Merge branch 'dev' into bmk/snmp/snmpc/OTP-9004

187 files changed, 8049 insertions, 4386 deletions

diff --git a/erts/configure.in b/erts/configure.in
index 6e983a07b0..627f734409 100644
--- a/erts/configure.in
+++ b/erts/configure.in
@@ -580,6 +580,11 @@ AC_SUBST(WFLAGS)
 AC_SUBST(CFLAG_RUNTIME_LIBRARY_PATH)
 
 AC_CHECK_SIZEOF(void *) # Needed for ARCH and smp checks below
+if test "x$ac_cv_sizeof_void_p" = x8; then
+  AC_SUBST(EXTERNAL_WORD_SIZE, 64)
+else
+  AC_SUBST(EXTERNAL_WORD_SIZE, 32)
+fi
 
 dnl
 dnl Figure out operating system and cpu architecture
diff --git a/erts/doc/src/driver_entry.xml b/erts/doc/src/driver_entry.xml
index dd949d4048..dfddbb18ea 100644
--- a/erts/doc/src/driver_entry.xml
+++ b/erts/doc/src/driver_entry.xml
@@ -4,7 +4,7 @@
 <cref>
   <header>
     <copyright>
-      <year>2001</year><year>2010</year>
+      <year>2001</year><year>2011</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -36,7 +36,7 @@
   <description>
     <p>As of erts version 5.5.3 the driver interface has been extended
       (see <seealso marker="driver_entry#extended_marker">extended marker</seealso>).
-      The extended interface introduce
+      The extended interface introduces
       <seealso marker="erl_driver#version_management">version management</seealso>,
       the possibility to pass capability flags
       (see <seealso marker="driver_entry#driver_flags">driver flags</seealso>)
@@ -45,21 +45,21 @@
     <note>
       <p>Old drivers (compiled with an <c>erl_driver.h</c> from an
         earlier erts version than 5.5.3) have to be recompiled
-        (but does not have to use the extended interface).</p>
+        (but do not have to use the extended interface).</p>
     </note>
     <p>The <c>driver_entry</c> structure is a C struct that all erlang
-      drivers defines. It contains entry points for the erlang driver
+      drivers define. It contains entry points for the erlang driver
       that are called by the erlang emulator when erlang code accesses
       the driver.</p>
     <p>      
       <marker id="emulator"></marker>
       The <seealso marker="driver_entry">erl_driver</seealso> driver
-      API functions needs a port handle
+      API functions need a port handle
       that identifies the driver instance (and the port in the
       emulator). This is only passed to the <c>start</c> function, but
       not to the other functions. The <c>start</c> function returns a
       driver-defined handle that is passed to the other functions. A
-      common practice is to have the <c>start</c> function allocating
+      common practice is to have the <c>start</c> function allocate
       some application-defined structure and stash the <c>port</c>
       handle in it, to use it later with the driver API functions.</p>
     <p>The driver call-back functions are called synchronously from the
@@ -219,6 +219,10 @@ typedef struct erl_drv_entry {
           completes, write to the pipe (use <c>SetEvent</c> on
           Windows), this will make the emulator call
           <c>ready_input</c> or <c>ready_output</c>.</p>
+          <p>Spurious events may happen. That is, calls to <c>ready_input</c>
+          or <c>ready_output</c> even though no real events are signaled. In
+          reality it should be rare (and OS dependant), but a robust driver
+          must nevertheless be able to handle such cases.</p>
       </item>
       <tag><marker id="driver_name"/>char *driver_name</tag>
       <item>
@@ -235,7 +239,7 @@ typedef struct erl_drv_entry {
       </item>
       <tag>void *handle</tag>
       <item>
-        <p>This field is reserved for the emulators internal use. The
+        <p>This field is reserved for the emulator's internal use. The
           emulator will modify this field; therefore, it is important
           that the <c>driver_entry</c> isn't declared <c>const</c>.</p> 
       </item>
@@ -399,7 +403,7 @@ typedef struct erl_drv_entry {
       <tag>void *handle2</tag>
       <item>
         <p>
-          This field is reserved for the emulators internal use. The
+          This field is reserved for the emulator's internal use. The
           emulator will modify this field; therefore, it is important
           that the <c>driver_entry</c> isn't declared <c>const</c>.
         </p>
diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml
index 77bd952d41..1e6e290f6b 100644
--- a/erts/doc/src/erl.xml
+++ b/erts/doc/src/erl.xml
@@ -231,7 +231,8 @@
       <tag><c><![CDATA[-detached]]></c></tag>
       <item>
         <p>Starts the Erlang runtime system detached from the system
-          console. Useful for running daemons and backgrounds processes.</p>
+          console. Useful for running daemons and backgrounds processes. Implies
+          <c><![CDATA[-noinput]]></c>.</p>
       </item>
       <tag><c><![CDATA[-emu_args]]></c></tag>
       <item>
diff --git a/erts/doc/src/erl_nif.xml b/erts/doc/src/erl_nif.xml
index 27887cbdf6..5987ddbd5e 100644
--- a/erts/doc/src/erl_nif.xml
+++ b/erts/doc/src/erl_nif.xml
@@ -4,7 +4,7 @@
 <cref>
   <header>
     <copyright>
-      <year>2001</year><year>2010</year>
+      <year>2001</year><year>2011</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -464,7 +464,7 @@ typedef enum {
   </section>
 
   <funcs>
-    <func><name><ret>void*</ret><nametext>enif_alloc(ErlNifEnv* env, size_t size)</nametext></name>
+    <func><name><ret>void*</ret><nametext>enif_alloc(size_t size)</nametext></name>
       <fsummary>Allocate dynamic memory.</fsummary>
       <desc><p>Allocate memory of <c>size</c> bytes. Return NULL if allocation failed.</p></desc>
     </func>
@@ -539,7 +539,7 @@ typedef enum {
     <desc><p>Same as <seealso marker="erl_driver#erl_drv_equal_tids">erl_drv_equal_tids</seealso>.
           </p></desc>
     </func>
-    <func><name><ret>void</ret><nametext>enif_free(ErlNifEnv* env, void* ptr)</nametext></name>
+    <func><name><ret>void</ret><nametext>enif_free(void* ptr)</nametext></name>
       <fsummary>Free dynamic memory</fsummary>
       <desc><p>Free memory allocated by <c>enif_alloc</c>.</p></desc>
     </func>
@@ -857,11 +857,6 @@ typedef enum {
       <seealso marker="#enif_release_resource">enif_release_resource</seealso>.</p>
       </desc>
     </func>
-    <func><name><ret>ErlNifPid*</ret><nametext>enif_self(ErlNifEnv* caller_env, ErlNifPid* pid)</nametext></name>
-      <fsummary>Get the pid of the calling process.</fsummary>
-      <desc><p>Initialize the pid variable <c>*pid</c> to represent the
-      calling process. Return <c>pid</c>.</p></desc>
-    </func>
     <func><name><ret>ERL_NIF_TERM</ret><nametext>enif_make_string(ErlNifEnv* env, const char* string, ErlNifCharEncoding encoding)</nametext></name>
       <fsummary>Create a string.</fsummary>
       <desc><p>Create a list containing the characters of the
@@ -980,11 +975,12 @@ typedef enum {
       <c>reload</c> or <c>upgrade</c>.</p>
       <p>Was previously named <c>enif_get_data</c>.</p></desc>
     </func>
-    <func><name><ret>void</ret><nametext>enif_realloc_binary(ErlNifBinary* bin, size_t size)</nametext></name>
+    <func><name><ret>int</ret><nametext>enif_realloc_binary(ErlNifBinary* bin, size_t size)</nametext></name>
       <fsummary>Change the size of a binary.</fsummary>
       <desc><p>Change the size of a binary <c>bin</c>. The source binary
       may be read-only, in which case it will be left untouched and
-      a mutable copy is allocated and assigned to <c>*bin</c>.</p></desc>
+      a mutable copy is allocated and assigned to <c>*bin</c>. Return true on success,
+      false if memory allocation failed.</p></desc>
     </func>
     <func><name><ret>void</ret><nametext>enif_release_binary(ErlNifBinary* bin)</nametext></name>
       <fsummary>Release a binary.</fsummary>
@@ -1041,7 +1037,12 @@ typedef enum {
     <desc><p>Same as <seealso marker="erl_driver#erl_drv_rwlock_tryrwlock">erl_drv_rwlock_tryrwlock</seealso>.
           </p></desc>
     </func>
-    <func><name><ret>unsigned</ret><nametext>enif_send(ErlNifEnv* env, ErlNifPid* to_pid, ErlNifEnv* msg_env, ERL_NIF_TERM msg)</nametext></name>
+    <func><name><ret>ErlNifPid*</ret><nametext>enif_self(ErlNifEnv* caller_env, ErlNifPid* pid)</nametext></name>
+      <fsummary>Get the pid of the calling process.</fsummary>
+      <desc><p>Initialize the pid variable <c>*pid</c> to represent the
+      calling process. Return <c>pid</c>.</p></desc>
+    </func>
+    <func><name><ret>int</ret><nametext>enif_send(ErlNifEnv* env, ErlNifPid* to_pid, ErlNifEnv* msg_env, ERL_NIF_TERM msg)</nametext></name>
       <fsummary>Send a message to a process.</fsummary>
       <desc><p>Send a message to a process.</p>
       <taglist>
diff --git a/erts/doc/src/erlang.xml b/erts/doc/src/erlang.xml
index 78d58a1e56..c3f06982f5 100644
--- a/erts/doc/src/erlang.xml
+++ b/erts/doc/src/erlang.xml
@@ -3980,7 +3980,8 @@ os_prompt%</pre>
           <tag><c>{status, Status}</c></tag>
           <item>
             <p><c>Status</c> is the status of the process. <c>Status</c>
-              is <c>waiting</c> (waiting for a message), <c>running</c>,
+              is <c>exiting</c>, <c>garbage_collecting</c>,
+              <c>waiting</c> (for a message), <c>running</c>,
               <c>runnable</c> (ready to run, but another process is
               running), or <c>suspended</c> (suspended on a "busy" port
               or by the <c>erlang:suspend_process/[1,2]</c> BIF).</p>
diff --git a/erts/doc/src/erlc.xml b/erts/doc/src/erlc.xml
index 1e8960c22c..ebf76a2afe 100644
--- a/erts/doc/src/erlc.xml
+++ b/erts/doc/src/erlc.xml
@@ -4,7 +4,7 @@
 <comref>
   <header>
     <copyright>
-      <year>1997</year><year>2010</year>
+      <year>1997</year><year>2011</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -141,6 +141,50 @@
           for compiling native code, which needs to be compiled with the same
           run-time system that it should be run on.</p>
       </item>
+      <tag>-M</tag>
+      <item>
+        <p>Produces a Makefile rule to track headers dependencies. The
+          rule is sent to stdout. No object file is produced.
+        </p>
+      </item>
+      <tag>-MF <em>Makefile</em></tag>
+      <item>
+        <p>Like the <c><![CDATA[-M]]></c> option above, except that the
+          Makefile is written to <em>Makefile</em>. No object
+          file is produced.
+        </p>
+      </item>
+      <tag>-MD</tag>
+      <item>
+        <p>Same as <c><![CDATA[-M -MF <File>.Pbeam]]></c>.
+        </p>
+      </item>
+      <tag>-MT <em>Target</em></tag>
+      <item>
+        <p>In conjunction with <c><![CDATA[-M]]></c> or
+          <c><![CDATA[-MF]]></c>, change the name of the rule emitted
+          to <em>Target</em>.
+        </p>
+      </item>
+      <tag>-MQ <em>Target</em></tag>
+      <item>
+        <p>Like the <c><![CDATA[-MT]]></c> option above, except that
+          characters special to make(1) are quoted.
+        </p>
+      </item>
+      <tag>-MP</tag>
+      <item>
+        <p>In conjunction with <c><![CDATA[-M]]></c> or
+          <c><![CDATA[-MF]]></c>, add a phony target for each dependency.
+        </p>
+      </item>
+      <tag>-MG</tag>
+      <item>
+        <p>In conjunction with <c><![CDATA[-M]]></c> or
+          <c><![CDATA[-MF]]></c>, consider missing headers as generated
+          files and add them to the dependencies.
+        </p>
+      </item>
       <tag>--</tag>
       <item>
         <p>Signals that no more options will follow.
diff --git a/erts/doc/src/escript.xml b/erts/doc/src/escript.xml
index 44c9a5ac68..588508aae6 100644
--- a/erts/doc/src/escript.xml
+++ b/erts/doc/src/escript.xml
@@ -153,7 +153,10 @@ halt(1).</pre>
         <p>Execution of interpreted code is slower than compiled code.
           If much of the execution takes place in interpreted code it
           may be worthwhile to compile it, even though the compilation
-          itself will take a little while.</p>
+          itself will take a little while. It is also possible to supply
+	  <c>native</c> instead of compile, this will compile the script 
+	  using the native flag, again depending on the characteristics 
+	  of the escript this could or could not be worth while.</p>
 
         <p>As mentioned earlier, it is possible to have a script which
           contains precompiled <c>beam</c> code. In a precompiled
@@ -397,6 +400,9 @@ ok
        Warnings and errors (if any) are written to the standard output, but
        the script will not be run. The exit status will be 0 if there were
        no errors, and 127 otherwise.</item>
+
+       <tag>-n</tag>
+      <item>Compile the escript using the +native flag.</item>
     </taglist>
   </section>
 </comref>
diff --git a/erts/emulator/Makefile.in b/erts/emulator/Makefile.in
index 6c33e2ca16..f04df354a8 100644
--- a/erts/emulator/Makefile.in
+++ b/erts/emulator/Makefile.in
@@ -505,8 +505,10 @@ ifdef HIPE_ENABLED
 OPCODE_TABLES += hipe/hipe_ops.tab
 endif
 
-$(TTF_DIR)/beam_opcodes.h $(TTF_DIR)/beam_opcodes.c: $(OPCODE_TABLES)
-	LANG=C $(PERL) utils/beam_makeops -outdir $(TTF_DIR) \
+$(TTF_DIR)/beam_opcodes.h $(TTF_DIR)/beam_opcodes.c: $(OPCODE_TABLES) utils/beam_makeops
+	LANG=C $(PERL) utils/beam_makeops \
+		-wordsize @EXTERNAL_WORD_SIZE@ \
+		-outdir $(TTF_DIR) \
 		-emulator $(OPCODE_TABLES)
 
 # bif and atom table
diff --git a/erts/emulator/beam/beam_debug.c b/erts/emulator/beam/beam_debug.c
index b0bf14b94f..2855241b91 100644
--- a/erts/emulator/beam/beam_debug.c
+++ b/erts/emulator/beam/beam_debug.c
@@ -48,7 +48,6 @@
 void dbg_bt(Process* p, Eterm* sp);
 void dbg_where(BeamInstr* addr, Eterm x0, Eterm* reg);
 
-static void print_big(int to, void *to_arg, Eterm* addr);
 static int print_op(int to, void *to_arg, int op, int size, BeamInstr* addr);
 Eterm
 erts_debug_same_2(Process* p, Eterm term1, Eterm term2)
@@ -157,6 +156,25 @@ void debug_dump_code(BeamInstr *I, int num)
 }
 #endif
 
+BIF_RETTYPE
+erts_debug_instructions_0(BIF_ALIST_0)
+{
+    int i = 0;
+    Uint needed = num_instructions * 2;
+    Eterm* hp;
+    Eterm res = NIL;
+
+    for (i = 0; i < num_instructions; i++) {
+	needed += 2*strlen(opc[i].name);
+    }
+    hp = HAlloc(BIF_P, needed);
+    for (i = num_instructions-1; i >= 0; i--) {
+	Eterm s = erts_bld_string_n(&hp, 0, opc[i].name, strlen(opc[i].name));
+	res = erts_bld_cons(&hp, 0, s, res);
+    }
+    return res;
+}
+
 Eterm
 erts_debug_disassemble_1(Process* p, Eterm addr)
 {
@@ -312,6 +330,7 @@ print_op(int to, void *to_arg, int op, int size, BeamInstr* addr)
     BeamInstr packed = 0;		/* Accumulator for packed operations. */
     BeamInstr args[8];		/* Arguments for this instruction. */
     BeamInstr* ap;			/* Pointer to arguments. */
+    BeamInstr* unpacked;		/* Unpacked arguments */
 
     start_prog = opc[op].pack;
 
@@ -360,6 +379,12 @@ print_op(int to, void *to_arg, int op, int size, BeamInstr* addr)
 		*ap++ = packed & BEAM_LOOSE_MASK;
 		packed >>= BEAM_LOOSE_SHIFT;
 		break;
+#ifdef ARCH_64
+	    case 'w':		/* Shift 32 steps */
+		*ap++ = packed & BEAM_WIDE_MASK;
+		packed >>= BEAM_WIDE_SHIFT;
+		break;
+#endif
 	    case 'p':
 		*sp++ = *--ap;
 		break;
@@ -386,7 +411,7 @@ print_op(int to, void *to_arg, int op, int size, BeamInstr* addr)
 	    break;
 	case 'x':		/* x(N) */
 	    if (reg_index(ap[0]) == 0) {
-		erts_print(to, to_arg, "X[0]");
+		erts_print(to, to_arg, "x[0]");
 	    } else {
 		erts_print(to, to_arg, "x(%d)", reg_index(ap[0]));
 	    }
@@ -506,6 +531,7 @@ print_op(int to, void *to_arg, int op, int size, BeamInstr* addr)
 	    ap++;
 	    break;
 	case 'P':	/* Byte offset into tuple (see beam_load.c) */
+	case 'Q':	/* Like 'P', but packable */
 	    erts_print(to, to_arg, "%d", (*ap / sizeof(Eterm)) - 1);
 	    ap++;
 	    break;
@@ -526,9 +552,12 @@ print_op(int to, void *to_arg, int op, int size, BeamInstr* addr)
      * Print more information about certain instructions.
      */
 
+    unpacked = ap;
     ap = addr + size;
     switch (op) {
-    case op_i_select_val_sfI:
+    case op_i_select_val_rfI:
+    case op_i_select_val_xfI:
+    case op_i_select_val_yfI:
 	{
 	    int n = ap[-1];
 
@@ -540,7 +569,24 @@ print_op(int to, void *to_arg, int op, int size, BeamInstr* addr)
 	    }
 	}
 	break;
-    case op_i_jump_on_val_sfII:
+    case op_i_select_tuple_arity_rfI:
+    case op_i_select_tuple_arity_xfI:
+    case op_i_select_tuple_arity_yfI:
+	{
+	    int n = ap[-1];
+
+	    while (n > 0) {
+		Uint arity = arityval(ap[0]);
+		erts_print(to, to_arg, " {%d} f(" HEXF ")", arity, ap[1]);
+		ap += 2;
+		size += 2;
+		n--;
+	    }
+	}
+	break;
+    case op_i_jump_on_val_rfII:
+    case op_i_jump_on_val_xfII:
+    case op_i_jump_on_val_yfII:
 	{
 	    int n;
 	    for (n = ap[-2]; n > 0; n--) {
@@ -550,39 +596,46 @@ print_op(int to, void *to_arg, int op, int size, BeamInstr* addr)
 	    }
 	}
 	break;
-    case op_i_select_big_sf:
-	while (ap[0]) {
-	    Eterm *bigp = (Eterm *) ap;
-	    int arity = thing_arityval(*bigp);
-	    print_big(to, to_arg, bigp);
-	    size += TermWords(arity+1);
-	    ap += TermWords(arity+1);
-	    erts_print(to, to_arg, " f(" HEXF ") ", ap[0]);
-	    ap++;
-	    size++;
+    case op_i_jump_on_val_zero_rfI:
+    case op_i_jump_on_val_zero_xfI:
+    case op_i_jump_on_val_zero_yfI:
+	{
+	    int n;
+	    for (n = ap[-1]; n > 0; n--) {
+		erts_print(to, to_arg, "f(" HEXF ") ", ap[0]);
+		ap++;
+		size++;
+	    }
+	}
+	break;
+    case op_i_put_tuple_rI:
+    case op_i_put_tuple_xI:
+    case op_i_put_tuple_yI:
+	{
+	    int n = unpacked[-1];
+
+	    while (n > 0) {
+		if (!is_header(ap[0])) {
+		    erts_print(to, to_arg, " %T", (Eterm) ap[0]);
+		} else {
+		    switch ((ap[0] >> 2) & 0x03) {
+		    case R_REG_DEF:
+			erts_print(to, to_arg, " x(0)");
+			break;
+		    case X_REG_DEF:
+			erts_print(to, to_arg, " x(%d)", ap[0] >> 4);
+			break;
+		    case Y_REG_DEF:
+			erts_print(to, to_arg, " y(%d)", ap[0] >> 4);
+			break;
+		    }
+		}
+		ap++, size++, n--;
+	    }
 	}
-	ap++;
-	size++;
 	break;
     }
     erts_print(to, to_arg, "\n");
 
     return size;
 }
-
-static void
-print_big(int to, void *to_arg, Eterm* addr)
-{
-    int i;
-    int k;
-
-    i = BIG_SIZE(addr);
-    if (BIG_SIGN(addr))
-	erts_print(to, to_arg, "-#integer(%d) = {", i);
-    else
-	erts_print(to, to_arg, "#integer(%d) = {", i);
-    erts_print(to, to_arg, "0x%x", BIG_DIGIT(addr, 0));
-    for (k = 1; k < i; k++)
-	erts_print(to, to_arg, ",0x%x", BIG_DIGIT(addr, k));
-    erts_print(to, to_arg, "}");
-}
diff --git a/erts/emulator/beam/beam_emu.c b/erts/emulator/beam/beam_emu.c
index 8a0e12dd4f..a4fb454481 100644
--- a/erts/emulator/beam/beam_emu.c
+++ b/erts/emulator/beam/beam_emu.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -321,6 +321,7 @@ extern int count_instructions;
 #  define POST_BIF_GC_SWAPIN_0(_p, _res)				\
      ERTS_SMP_REQ_PROC_MAIN_LOCK((_p));					\
      PROCESS_MAIN_CHK_LOCKS((_p));					\
+     ERTS_VERIFY_UNUSED_TEMP_ALLOC((_p));				\
      if (((_p)->mbuf) || (MSO(_p).overhead >= BIN_VHEAP_SZ(_p)) ) {	\
        _res = erts_gc_after_bif_call((_p), (_res), NULL, 0);		\
        E = (_p)->stop;							\
@@ -328,6 +329,7 @@ extern int count_instructions;
      HTOP = HEAP_TOP((_p))
 
 #  define POST_BIF_GC_SWAPIN(_p, _res, _regs, _arity)			\
+     ERTS_VERIFY_UNUSED_TEMP_ALLOC((_p));				\
      ERTS_SMP_REQ_PROC_MAIN_LOCK((_p));					\
      PROCESS_MAIN_CHK_LOCKS((_p));					\
      if (((_p)->mbuf) || (MSO(_p).overhead >= BIN_VHEAP_SZ(_p)) ) {	\
@@ -344,6 +346,8 @@ extern int count_instructions;
 #define xb(N) (*(Eterm *) (((unsigned char *)reg) + (N)))
 #define yb(N) (*(Eterm *) (((unsigned char *)E) + (N)))
 #define fb(N) (*(double *) (((unsigned char *)&(freg[0].fd)) + (N)))
+#define Qb(N) (N)
+#define Ib(N) (N)
 #define x(N) reg[N]
 #define y(N) E[N]
 #define r(N) x##N
@@ -365,6 +369,7 @@ extern int count_instructions;
            reg[0] = r(0); \
            PROCESS_MAIN_CHK_LOCKS(c_p); \
            FCALLS -= erts_garbage_collect(c_p, needed + (HeapNeed), reg, (M)); \
+           ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p); \
            PROCESS_MAIN_CHK_LOCKS(c_p); \
            r(0) = reg[0]; \
            SWAPIN; \
@@ -418,6 +423,7 @@ extern int count_instructions;
        reg[0] = r(0);                                           		\
        PROCESS_MAIN_CHK_LOCKS(c_p);                             		\
        FCALLS -= erts_garbage_collect(c_p, need, reg, (Live));  		\
+       ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);					\
        PROCESS_MAIN_CHK_LOCKS(c_p);                             		\
        r(0) = reg[0];                                           		\
        SWAPIN;                                                  		\
@@ -440,6 +446,7 @@ extern int count_instructions;
        reg[0] = r(0);                                           \
        PROCESS_MAIN_CHK_LOCKS(c_p);                             \
        FCALLS -= erts_garbage_collect(c_p, need, reg, (Live));  \
+       ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);			\
        PROCESS_MAIN_CHK_LOCKS(c_p);                             \
        r(0) = reg[0];                                           \
        SWAPIN;                                                  \
@@ -462,6 +469,7 @@ extern int count_instructions;
        reg[Live] = Extra;						\
        PROCESS_MAIN_CHK_LOCKS(c_p);					\
        FCALLS -= erts_garbage_collect(c_p, need, reg, (Live)+1);	\
+       ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);				\
        PROCESS_MAIN_CHK_LOCKS(c_p);					\
        if (Live > 0) {							\
 	   r(0) = reg[0];						\
@@ -472,6 +480,13 @@ extern int count_instructions;
     HEAP_SPACE_VERIFIED(need);                                      \
   } while (0)
 
+#define TestHeapPutList(Need, Reg)		\
+  do {						\
+     TestHeap((Need), 1);			\
+     PutList(Reg, r(0), r(0), StoreSimpleDest);	\
+     CHECK_TERM(r(0));				\
+  } while (0)
+
 #ifdef HYBRID
 #ifdef INCREMENTAL
 #define TestGlobalHeap(Nh, Live, hp)                                    \
@@ -516,6 +531,11 @@ extern int count_instructions;
      SWAPIN;							\
   } while (0)
 
+#define PutTuple(Dst, Arity)			\
+ do {						\
+   Dst = make_tuple(HTOP);			\
+   pt_arity = (Arity);				\
+ } while (0)
 
 /*
  * Check that we haven't used the reductions and jump to function pointed to by
@@ -674,6 +694,11 @@ extern int count_instructions;
     SET_I((BeamInstr *) CallDest);			\
     Dispatch();
 
+#define MoveJump(Src)				\
+     r(0) = (Src);				\
+     SET_I((BeamInstr *) Arg(0));		\
+     Goto(*I);
+
 #define GetList(Src, H, T) do {			\
    Eterm* tmp_ptr = list_val(Src);		\
    H = CAR(tmp_ptr);				\
@@ -723,16 +748,8 @@ extern int count_instructions;
      (Dest) = (* (Eterm *) EXPAND_POINTER(tmp_arg1));		\
   } while (0)
 
-#define PutTuple(Arity, Src, Dest)		\
-     ASSERT(is_arity_value(Arity));		\
-     Dest = make_tuple(HTOP);			\
-     HTOP[0] = (Arity);				\
-     HTOP[1] = (Src);				\
-     HTOP += 2
-
-#define Put(Word) *HTOP++ = (Word)
-
 #define EqualImmed(X, Y, Action) if (X != Y) { Action; }
+#define NotEqualImmed(X, Y, Action) if (X == Y) { Action; }
 
 #define IsFloat(Src, Fail) if (is_not_float(Src)) { Fail; }
 
@@ -984,8 +1001,41 @@ extern int count_instructions;
 #define IsPid(Src, Fail) if (is_not_pid(Src)) { Fail; }
 #define IsRef(Src, Fail) if (is_not_ref(Src)) { Fail; }
 
-static BifFunction translate_gc_bif(void* gcf);
-static BeamInstr* handle_error(Process* c_p, BeamInstr* pc, Eterm* reg, BifFunction bf);
+/*
+ * process_main() is already huge, so we want to avoid inlining
+ * into it. Especially functions that are seldom used.
+ */
+#ifdef __GNUC__
+#  define NOINLINE __attribute__((__noinline__))
+#else
+#  define NOINLINE
+#endif
+
+/*
+ * The following functions are called directly by process_main().
+ * Don't inline them.
+ */
+static BifFunction translate_gc_bif(void* gcf) NOINLINE;
+static BeamInstr* handle_error(Process* c_p, BeamInstr* pc,
+			       Eterm* reg, BifFunction bf) NOINLINE;
+static BeamInstr* call_error_handler(Process* p, BeamInstr* ip,
+				     Eterm* reg, Eterm func) NOINLINE;
+static BeamInstr* fixed_apply(Process* p, Eterm* reg, Uint arity) NOINLINE;
+static BeamInstr* apply(Process* p, Eterm module, Eterm function,
+			Eterm args, Eterm* reg) NOINLINE;
+static int hibernate(Process* c_p, Eterm module, Eterm function,
+		     Eterm args, Eterm* reg) NOINLINE;
+static BeamInstr* call_fun(Process* p, int arity,
+			   Eterm* reg, Eterm args) NOINLINE;
+static BeamInstr* apply_fun(Process* p, Eterm fun,
+			    Eterm args, Eterm* reg) NOINLINE;
+static Eterm new_fun(Process* p, Eterm* reg,
+		     ErlFunEntry* fe, int num_free) NOINLINE;
+
+
+/*
+ * Functions not directly called by process_main(). OK to inline.
+ */
 static BeamInstr* next_catch(Process* c_p, Eterm *reg);
 static void terminate_proc(Process* c_p, Eterm Value);
 static Eterm add_stacktrace(Process* c_p, Eterm Value, Eterm exc);
@@ -993,16 +1043,6 @@ static void save_stacktrace(Process* c_p, BeamInstr* pc, Eterm* reg,
 			     BifFunction bf, Eterm args);
 static struct StackTrace * get_trace_from_exc(Eterm exc);
 static Eterm make_arglist(Process* c_p, Eterm* reg, int a);
-static Eterm call_error_handler(Process* p, BeamInstr* ip, Eterm* reg);
-static Eterm call_breakpoint_handler(Process* p, BeamInstr* fi, Eterm* reg);
-static BeamInstr* fixed_apply(Process* p, Eterm* reg, Uint arity);
-static BeamInstr* apply(Process* p, Eterm module, Eterm function,
-		     Eterm args, Eterm* reg);
-static int hibernate(Process* c_p, Eterm module, Eterm function,
-		     Eterm args, Eterm* reg);
-static BeamInstr* call_fun(Process* p, int arity, Eterm* reg, Eterm args);
-static BeamInstr* apply_fun(Process* p, Eterm fun, Eterm args, Eterm* reg);
-static Eterm new_fun(Process* p, Eterm* reg, ErlFunEntry* fe, int num_free);
 
 #if defined(VXWORKS)
 static int init_done;
@@ -1146,6 +1186,8 @@ void process_main(void)
 
     Uint temp_bits; /* Temporary used by BsSkipBits2 & BsGetInteger2 */
 
+    Eterm pt_arity;		/* Used by do_put_tuple */
+
     ERL_BITS_DECLARE_STATEP; /* Has to be last declaration */
 
 
@@ -1178,7 +1220,12 @@ void process_main(void)
  do_schedule1:
     PROCESS_MAIN_CHK_LOCKS(c_p);
     ERTS_SMP_UNREQ_PROC_MAIN_LOCK(c_p);
+#if HALFWORD_HEAP
+    ASSERT(erts_get_scheduler_data()->num_tmp_heap_used == 0);
+#endif
+    ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
     c_p = schedule(c_p, reds_used);
+    ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 #ifdef DEBUG
     pid = c_p->id;
 #endif
@@ -1246,6 +1293,52 @@ void process_main(void)
 #define STORE_ARITH_RESULT(res) StoreBifResult(2, (res));
 #define ARITH_FUNC(name) erts_gc_##name
 
+	{
+	    Eterm increment_reg_val;
+	    Eterm increment_val;
+	    Uint live;
+	    Eterm result;
+
+	OpCase(i_increment_yIId):
+	    increment_reg_val = yb(Arg(0));
+	    goto do_increment;
+
+	OpCase(i_increment_xIId):
+	    increment_reg_val = xb(Arg(0));
+	    goto do_increment;
+
+	OpCase(i_increment_rIId):
+	    increment_reg_val = r(0);
+	    I--;
+
+	do_increment:
+	    increment_val = Arg(1);
+	    if (is_small(increment_reg_val)) {
+		Sint i = signed_val(increment_reg_val) + increment_val;
+		ASSERT(MY_IS_SSMALL(i) == IS_SSMALL(i));
+		if (MY_IS_SSMALL(i)) {
+		    result = make_small(i);
+		store_result:
+		    StoreBifResult(3, result);
+		}
+	    }
+
+	    live = Arg(2);
+	    SWAPOUT;
+	    reg[0] = r(0);
+	    reg[live] = increment_reg_val;
+	    reg[live+1] = make_small(increment_val);
+	    result = erts_gc_mixed_plus(c_p, reg, live);
+	    r(0) = reg[0];
+	    SWAPIN;
+	    ERTS_HOLE_CHECK(c_p);
+	    if (is_value(result)) {
+		goto store_result;
+	    }
+	    ASSERT(c_p->freason != BADMATCH || is_value(c_p->fvalue));
+	    goto find_func_info;
+	}
+	    
  OpCase(i_plus_jId):
  {
      Eterm result;
@@ -1309,6 +1402,52 @@ void process_main(void)
     }
     Next(1);
 
+    {
+	Eterm is_eq_exact_lit_val;
+
+    OpCase(i_is_eq_exact_literal_xfc):
+	is_eq_exact_lit_val = xb(Arg(0));
+	I++;
+	goto do_is_eq_exact_literal;
+
+    OpCase(i_is_eq_exact_literal_yfc):
+	is_eq_exact_lit_val = yb(Arg(0));
+	I++;
+	goto do_is_eq_exact_literal;
+
+    OpCase(i_is_eq_exact_literal_rfc):
+	is_eq_exact_lit_val = r(0);
+
+    do_is_eq_exact_literal:
+	if (!eq(Arg(1), is_eq_exact_lit_val)) {
+	    ClauseFail();
+	}
+	Next(2);
+    }
+
+    {
+	Eterm is_ne_exact_lit_val;
+
+    OpCase(i_is_ne_exact_literal_xfc):
+	is_ne_exact_lit_val = xb(Arg(0));
+	I++;
+	goto do_is_ne_exact_literal;
+
+    OpCase(i_is_ne_exact_literal_yfc):
+	is_ne_exact_lit_val = yb(Arg(0));
+	I++;
+	goto do_is_ne_exact_literal;
+
+    OpCase(i_is_ne_exact_literal_rfc):
+	is_ne_exact_lit_val = r(0);
+
+    do_is_ne_exact_literal:
+	if (eq(Arg(1), is_ne_exact_lit_val)) {
+	    ClauseFail();
+	}
+	Next(2);
+    }
+
  OpCase(i_move_call_only_fcr): {
      r(0) = Arg(1);
  }
@@ -1392,6 +1531,17 @@ void process_main(void)
      NextPF(1, next);
  }
 
+ OpCase(move_x1_c): {
+	x(1) = Arg(0);
+	Next(1);
+    }
+
+ OpCase(move_x2_c): {
+	x(2) = Arg(0);
+	Next(1);
+    }
+
+
  OpCase(return): {
     SET_I(c_p->cp);
     /*
@@ -1405,16 +1555,6 @@ void process_main(void)
     Goto(*I);
  }
 
- OpCase(test_heap_1_put_list_Iy): {
-     BeamInstr *next;
-
-     PreFetch(2, next);
-     TestHeap(Arg(0), 1);
-     PutList(yb(Arg(1)), r(0), r(0), StoreSimpleDest);
-     CHECK_TERM(r(0));
-     NextPF(2, next);
- }
-
     /*
      * Send is almost a standard call-BIF with two arguments, except for:
      *    1) It cannot be traced.
@@ -1447,24 +1587,36 @@ void process_main(void)
      goto find_func_info;
  }
 
- OpCase(i_element_jssd): {
-     Eterm index;
-     Eterm tuple;
-
-     /*
-      * Inlined version of element/2 for speed.
-      */
-     GetArg2(1, index, tuple);
-     if (is_small(index) && is_tuple(tuple)) {
-	 Eterm* tp = tuple_val(tuple);
-
-	 if ((signed_val(index) >= 1) &&
-	     (signed_val(index) <= arityval(*tp))) {
-	     Eterm result = tp[signed_val(index)];
-	     StoreBifResult(3, result);
-	 }
-     }
- }
+    {
+	Eterm element_index;
+	Eterm element_tuple;
+
+    OpCase(i_element_xjsd):
+	element_tuple = xb(Arg(0));
+	I++;
+	goto do_element;
+
+    OpCase(i_element_yjsd):
+	element_tuple = yb(Arg(0));
+	I++;
+	goto do_element;
+
+    OpCase(i_element_rjsd):
+	element_tuple = r(0);
+	/* Fall through */
+
+    do_element:
+	GetArg1(1, element_index);
+	if (is_small(element_index) && is_tuple(element_tuple)) {
+	    Eterm* tp = tuple_val(element_tuple);
+
+	    if ((signed_val(element_index) >= 1) &&
+		(signed_val(element_index) <= arityval(*tp))) {
+		Eterm result = tp[signed_val(element_index)];
+		StoreBifResult(2, result);
+	    }
+	}
+    }
  /* Fall through */
 
  OpCase(badarg_j):
@@ -1472,24 +1624,32 @@ void process_main(void)
     c_p->freason = BADARG;
     goto lb_Cl_error;
 
- OpCase(i_fast_element_jIsd): {
-     Eterm tuple;
-
-     /*
-      * Inlined version of element/2 for even more speed.
-      * The first argument is an untagged integer >= 1.
-      * The second argument is guaranteed to be a register operand.
-      */
-     GetArg1(2, tuple);
-     if (is_tuple(tuple)) {
-	 Eterm* tp = tuple_val(tuple);
-	 tmp_arg2 = Arg(1);
-	 if (tmp_arg2 <= arityval(*tp)) {
-	     Eterm result = tp[tmp_arg2];
-	     StoreBifResult(3, result);
-	 }
-     }
+    {
+	Eterm fast_element_tuple;
+
+    OpCase(i_fast_element_rjId):
+	fast_element_tuple = r(0);
+
+    do_fast_element:
+	if (is_tuple(fast_element_tuple)) {
+	    Eterm* tp = tuple_val(fast_element_tuple);
+	    Eterm pos = Arg(1);	/* Untagged integer >= 1 */
+	    if (pos <= arityval(*tp)) {
+		Eterm result = tp[pos];
+		StoreBifResult(2, result);
+	    }
+	}
      goto badarg;
+
+    OpCase(i_fast_element_xjId):
+     fast_element_tuple = xb(Arg(0));
+     I++;
+     goto do_fast_element;
+
+    OpCase(i_fast_element_yjId):
+     fast_element_tuple = yb(Arg(0));
+     I++;
+     goto do_fast_element;
  }
 
  OpCase(catch_yf):
@@ -1515,6 +1675,7 @@ void process_main(void)
 		 SWAPOUT;
 		 PROCESS_MAIN_CHK_LOCKS(c_p);
 		 FCALLS -= erts_garbage_collect(c_p, 3, reg+2, 1);
+		 ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 		 PROCESS_MAIN_CHK_LOCKS(c_p);
 		 SWAPIN;
 	     }
@@ -1633,6 +1794,7 @@ void process_main(void)
 				       PROCESS_MAIN_CHK_LOCKS(c_p);
 				   },
 				   {
+				       ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 				       PROCESS_MAIN_CHK_LOCKS(c_p);
 				       r(0) = reg[0];
 				       SWAPIN;
@@ -1691,6 +1853,7 @@ void process_main(void)
      CANCEL_TIMER(c_p);
      free_message(msgp);
 
+     ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
      PROCESS_MAIN_CHK_LOCKS(c_p);
 
      NextPF(0, next);
@@ -1842,8 +2005,87 @@ void process_main(void)
      NextPF(0, next);
  }
 
- OpCase(i_select_val_sfI):
-     GetArg1(0, tmp_arg1);
+
+ {
+     Eterm select_val2;
+
+ OpCase(i_select_tuple_arity2_yfAfAf):
+     select_val2 = yb(Arg(0));
+     goto do_select_tuple_arity2;
+
+ OpCase(i_select_tuple_arity2_xfAfAf):
+     select_val2 = xb(Arg(0));
+     goto do_select_tuple_arity2;
+
+ OpCase(i_select_tuple_arity2_rfAfAf):
+     select_val2 = r(0);
+     I--;
+
+ do_select_tuple_arity2:
+     if (is_not_tuple(select_val2)) {
+	 goto select_val2_fail;
+     }
+     select_val2 = *tuple_val(select_val2);
+     goto do_select_val2;
+
+ OpCase(i_select_val2_yfcfcf):
+     select_val2 = yb(Arg(0));
+     goto do_select_val2;
+
+ OpCase(i_select_val2_xfcfcf):
+     select_val2 = xb(Arg(0));
+     goto do_select_val2;
+
+ OpCase(i_select_val2_rfcfcf):
+     select_val2 = r(0);
+     I--;
+
+ do_select_val2:
+     if (select_val2 == Arg(2)) {
+	 I += 2;
+     } else if (select_val2 == Arg(4)) {
+	 I += 4;
+     }
+
+ select_val2_fail:
+     SET_I((BeamInstr *) Arg(1));
+     Goto(*I);
+ }
+
+ {
+     Eterm select_val;
+
+ OpCase(i_select_tuple_arity_xfI):
+     select_val = xb(Arg(0));
+     goto do_select_tuple_arity;
+
+ OpCase(i_select_tuple_arity_yfI):
+     select_val = yb(Arg(0));
+     goto do_select_tuple_arity;
+
+ OpCase(i_select_tuple_arity_rfI):
+     select_val = r(0);
+     I--;
+
+ do_select_tuple_arity:
+     if (is_tuple(select_val)) {
+	 select_val = *tuple_val(select_val);
+	 goto do_binary_search;
+     }
+     SET_I((BeamInstr *) Arg(1));
+     Goto(*I);
+
+ OpCase(i_select_val_xfI):
+     select_val = xb(Arg(0));
+     goto do_binary_search;
+
+ OpCase(i_select_val_yfI):
+     select_val = yb(Arg(0));
+     goto do_binary_search;
+     
+ OpCase(i_select_val_rfI):
+     select_val = r(0);
+     I--;
 
  do_binary_search:
  {
@@ -1880,9 +2122,9 @@ void process_main(void)
 	 unsigned int boffset = ((unsigned int)bdiff >> 1) & ~(sizeof(struct Pairs)-1);
 
 	 mid = (struct Pairs*)((char*)low + boffset);
-	 if (tmp_arg1 < mid->val) {
+	 if (select_val < mid->val) {
 	     high = mid;
-	 } else if (tmp_arg1 > mid->val) {
+	 } else if (select_val > mid->val) {
 	     low = mid + 1;
 	 } else {
 	     SET_I(mid->addr);
@@ -1892,16 +2134,28 @@ void process_main(void)
      SET_I((BeamInstr *) Arg(1));
      Goto(*I);
  }
+ }
 
- OpCase(i_jump_on_val_zero_sfI):
  {
-     Eterm index;
-
-     GetArg1(0, index);
-     if (is_small(index)) {
-	 index = signed_val(index);
-	 if (index < Arg(2)) {
-	     SET_I((BeamInstr *) (&Arg(3))[index]);
+     Eterm jump_on_val_zero_index;
+     
+ OpCase(i_jump_on_val_zero_yfI):
+     jump_on_val_zero_index = yb(Arg(0));
+     goto do_jump_on_val_zero_index;
+
+ OpCase(i_jump_on_val_zero_xfI):
+     jump_on_val_zero_index = xb(Arg(0));
+     goto do_jump_on_val_zero_index;
+
+ OpCase(i_jump_on_val_zero_rfI):
+     jump_on_val_zero_index = r(0);
+     I--;
+
+ do_jump_on_val_zero_index:
+     if (is_small(jump_on_val_zero_index)) {
+	 jump_on_val_zero_index = signed_val(jump_on_val_zero_index);
+	 if (jump_on_val_zero_index < Arg(2)) {
+	     SET_I((BeamInstr *) (&Arg(3))[jump_on_val_zero_index]);
 	     Goto(*I);
 	 }
      }
@@ -1909,15 +2163,27 @@ void process_main(void)
      Goto(*I);
  }
 
- OpCase(i_jump_on_val_sfII):
  {
-     Eterm index;
+     Eterm jump_on_val_index;
 
-     GetArg1(0, index);
-     if (is_small(index)) {
-	 index = (Uint) (signed_val(index) - Arg(3));
-	 if (index < Arg(2)) {
-	     SET_I((BeamInstr *) (&Arg(4))[index]);
+ 
+ OpCase(i_jump_on_val_yfII):
+     jump_on_val_index = yb(Arg(0));
+     goto do_jump_on_val_index;
+
+ OpCase(i_jump_on_val_xfII):
+     jump_on_val_index = xb(Arg(0));
+     goto do_jump_on_val_index;
+
+ OpCase(i_jump_on_val_rfII):
+     jump_on_val_index = r(0);
+     I--;
+
+ do_jump_on_val_index:
+     if (is_small(jump_on_val_index)) {
+	 jump_on_val_index = (Uint) (signed_val(jump_on_val_index) - Arg(3));
+	 if (jump_on_val_index < Arg(2)) {
+	     SET_I((BeamInstr *) (&Arg(4))[jump_on_val_index]);
 	     Goto(*I);
 	 }
      }
@@ -1925,6 +2191,32 @@ void process_main(void)
      Goto(*I);
  }
 
+ do_put_tuple: {
+     Eterm* hp = HTOP;
+
+     *hp++ = make_arityval(pt_arity);
+
+     do {
+	 Eterm term = *I++;
+	 switch (term & _TAG_IMMED1_MASK) {
+	 case (R_REG_DEF << _TAG_PRIMARY_SIZE) | TAG_PRIMARY_HEADER:
+	     *hp++ = r(0);
+	     break;
+	 case (X_REG_DEF << _TAG_PRIMARY_SIZE) | TAG_PRIMARY_HEADER:
+	     *hp++ = x(term >> _TAG_IMMED1_SIZE);
+	     break;
+	 case (Y_REG_DEF << _TAG_PRIMARY_SIZE) | TAG_PRIMARY_HEADER:
+	     *hp++ = y(term >> _TAG_IMMED1_SIZE);
+	     break;
+	 default:
+	     *hp++ = term;
+	     break;
+	 }
+     } while (--pt_arity != 0);
+     HTOP = hp;
+     Goto(*I);
+ }
+
     /*
      * All guards with zero arguments have special instructions:
      * 	self/0
@@ -1952,6 +2244,7 @@ void process_main(void)
 	ASSERT(!ERTS_PROC_IS_EXITING(c_p));
 	result = (*bf)(c_p, arg);
 	ASSERT(!ERTS_PROC_IS_EXITING(c_p) || is_non_value(result));
+	ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 	PROCESS_MAIN_CHK_LOCKS(c_p);
 	ERTS_HOLE_CHECK(c_p);
 	FCALLS = c_p->fcalls;
@@ -1980,6 +2273,7 @@ void process_main(void)
 	ASSERT(!ERTS_PROC_IS_EXITING(c_p));
 	result = (*bf)(c_p, arg);
 	ASSERT(!ERTS_PROC_IS_EXITING(c_p) || is_non_value(result));
+	ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 	PROCESS_MAIN_CHK_LOCKS(c_p);
 	ERTS_HOLE_CHECK(c_p);
 	FCALLS = c_p->fcalls;
@@ -2009,6 +2303,7 @@ void process_main(void)
 	PROCESS_MAIN_CHK_LOCKS(c_p);
 	ERTS_SMP_UNREQ_PROC_MAIN_LOCK(c_p);
 	result = (*bf)(c_p, reg, live);
+	ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 	ERTS_SMP_REQ_PROC_MAIN_LOCK(c_p);
 	PROCESS_MAIN_CHK_LOCKS(c_p);
 	SWAPIN;
@@ -2044,6 +2339,7 @@ void process_main(void)
 	PROCESS_MAIN_CHK_LOCKS(c_p);
 	ERTS_SMP_UNREQ_PROC_MAIN_LOCK(c_p);
 	result = (*bf)(c_p, reg, live);
+	ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 	ERTS_SMP_REQ_PROC_MAIN_LOCK(c_p);
 	PROCESS_MAIN_CHK_LOCKS(c_p);
 	SWAPIN;
@@ -2082,6 +2378,7 @@ void process_main(void)
 	PROCESS_MAIN_CHK_LOCKS(c_p);
 	ERTS_SMP_UNREQ_PROC_MAIN_LOCK(c_p);
 	result = (*bf)(c_p, reg, live);
+	ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 	ERTS_SMP_REQ_PROC_MAIN_LOCK(c_p);
 	PROCESS_MAIN_CHK_LOCKS(c_p);
 	SWAPIN;
@@ -2116,6 +2413,7 @@ void process_main(void)
 	ASSERT(!ERTS_PROC_IS_EXITING(c_p));
 	result = (*bf)(c_p, tmp_arg1, tmp_arg2);
 	ASSERT(!ERTS_PROC_IS_EXITING(c_p) || is_non_value(result));
+	ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 	PROCESS_MAIN_CHK_LOCKS(c_p);
 	ERTS_HOLE_CHECK(c_p);
 	FCALLS = c_p->fcalls;
@@ -2139,6 +2437,7 @@ void process_main(void)
 	ASSERT(!ERTS_PROC_IS_EXITING(c_p));
 	result = (*bf)(c_p, tmp_arg1, tmp_arg2);
 	ASSERT(!ERTS_PROC_IS_EXITING(c_p) || is_non_value(result));
+	ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 	PROCESS_MAIN_CHK_LOCKS(c_p);
 	ERTS_HOLE_CHECK(c_p);
 	if (is_value(result)) {
@@ -2562,23 +2861,25 @@ void process_main(void)
 
  OpCase(i_int_bnot_jsId):
  {
-     GetArg1(1, tmp_arg1);
-     if (is_small(tmp_arg1)) {
-	 tmp_arg1 = make_small(~signed_val(tmp_arg1));
+     Eterm bnot_val;
+
+     GetArg1(1, bnot_val);
+     if (is_small(bnot_val)) {
+	 bnot_val = make_small(~signed_val(bnot_val));
      } else {
 	 Uint live = Arg(2);
 	 SWAPOUT;
 	 reg[0] = r(0);
-	 reg[live] = tmp_arg1;
-	 tmp_arg1 = erts_gc_bnot(c_p, reg, live);
+	 reg[live] = bnot_val;
+	 bnot_val = erts_gc_bnot(c_p, reg, live);
 	 r(0) = reg[0];
 	 SWAPIN;
 	 ERTS_HOLE_CHECK(c_p);
-	 if (is_nil(tmp_arg1)) {
+	 if (is_nil(bnot_val)) {
 	     goto lb_Cl_error;
 	 }
      }
-     StoreBifResult(3, tmp_arg1);
+     StoreBifResult(3, bnot_val);
  }
 
  badarith:
@@ -2833,121 +3134,6 @@ void process_main(void)
      goto do_schedule1;
  }
 
- OpCase(i_select_tuple_arity_sfI):
- {
-     GetArg1(0, tmp_arg1);
-
-     if (is_tuple(tmp_arg1)) {
-	 tmp_arg1 = *tuple_val(tmp_arg1);
-	 goto do_binary_search;
-     }
-     SET_I((BeamInstr *) Arg(1));
-     Goto(*I);
- }     
-
- OpCase(i_select_big_sf):
-    {
-	Eterm* bigp;
-	Uint arity;
-	Eterm* given;
-	Uint given_arity;
-	Uint given_size;
-
-	GetArg1(0, tmp_arg1);
-	if (is_big(tmp_arg1)) {
-
-	    /*
-	     * The loader has sorted the bignumbers in descending order
-	     * on the arity word.  Therefore, we know that the search
-	     * has failed as soon as we encounter an arity word less than
-	     * the arity word of the given number.  There is a zero word
-	     * (less than any valid arity word) stored after the last bignumber.
-	     */
-
- 	    given = big_val(tmp_arg1);
-	    given_arity = given[0];
-	    given_size = thing_arityval(given_arity);
-	    bigp = (Eterm *) &Arg(2);
-	    while ((arity = bigp[0]) > given_arity) {
-		bigp += (TermWords(thing_arityval(arity) + 1) + 1) * (sizeof(BeamInstr)/sizeof(Eterm));
-	    }
-	    while (bigp[0] == given_arity) {
-		if (memcmp(bigp+1, given+1, sizeof(Eterm)*given_size) == 0) {
-		    BeamInstr *tmp =
-			((BeamInstr *) (UWord) bigp) + TermWords(given_size + 1);
-		    SET_I((BeamInstr *) *tmp);
-		    Goto(*I);
-		}
-		bigp += (TermWords(thing_arityval(arity) + 1) + 1) * (sizeof(BeamInstr)/sizeof(Eterm));
-	    }
-	}
-
-	/*
-	 * Failed.
-	 */
-
-	SET_I((BeamInstr *) Arg(1));
-	Goto(*I);
-    }
-
-#if defined(ARCH_64) && !HALFWORD_HEAP
- OpCase(i_select_float_sfI):
- {
-     Uint f;
-     int n;
-     struct ValLabel {
-	 Uint f;
-	 BeamInstr* addr;
-     };
-     struct ValLabel* ptr;
-
-     GetArg1(0, tmp_arg1);
-     ASSERT(is_float(tmp_arg1));
-     f = float_val(tmp_arg1)[1];
-     n = Arg(2);
-     ptr = (struct ValLabel *) &Arg(3);
-     while (n-- > 0) {
-	 if (ptr->f == f) {
-	     SET_I(ptr->addr);
-	     Goto(*I);
-	 }
-	 ptr++;
-     }
-     SET_I((Eterm *) Arg(1));
-     Goto(*I);
- }
-#else
- OpCase(i_select_float_sfI):
- {
-     Uint fpart1;
-     Uint fpart2;
-     int n;
-     struct ValLabel {
-	 Uint fpart1;
-	 Uint fpart2;
-	 BeamInstr* addr;
-     };
-     struct ValLabel* ptr;
-
-     GetArg1(0, tmp_arg1);
-     ASSERT(is_float(tmp_arg1));
-     fpart1 = float_val(tmp_arg1)[1];
-     fpart2 = float_val(tmp_arg1)[2];
-
-     n = Arg(2);
-     ptr = (struct ValLabel *) &Arg(3);
-     while (n-- > 0) {
-	 if (ptr->fpart1 == fpart1 && ptr->fpart2 == fpart2) {
-	     SET_I(ptr->addr);
-	     Goto(*I);
-	 }
-	 ptr++;
-     }
-     SET_I((BeamInstr *) Arg(1));
-     Goto(*I);
- }
-#endif
-
  OpCase(set_tuple_element_sdP): {
      Eterm element;
      Eterm tuple;
@@ -2993,15 +3179,17 @@ void process_main(void)
 	the first argument. We also handle atom tags in the first
 	argument for backwards compatibility.
      */
-     GetArg2(0, tmp_arg1, tmp_arg2);
-     c_p->fvalue = tmp_arg2;
+     Eterm raise_val1;
+     Eterm raise_val2;
+     GetArg2(0, raise_val1, raise_val2);
+     c_p->fvalue = raise_val2;
      if (c_p->freason == EXC_NULL) {
        /* a safety check for the R10-0 case; should not happen */
        c_p->ftrace = NIL;
        c_p->freason = EXC_ERROR;
      }
      /* for R10-0 code, keep existing c_p->ftrace and hope it's correct */
-     switch (tmp_arg1) {
+     switch (raise_val1) {
      case am_throw:
        c_p->freason = EXC_THROWN & ~EXF_SAVETRACE;
        break;
@@ -3017,8 +3205,8 @@ void process_main(void)
 	   passed from a user! Currently only expecting generated calls.
 	*/
 	 struct StackTrace *s;
-	 c_p->ftrace = tmp_arg1;
-	 s = get_trace_from_exc(tmp_arg1);
+	 c_p->ftrace = raise_val1;
+	 s = get_trace_from_exc(raise_val1);
 	 if (s == NULL) {
 	   c_p->freason = EXC_ERROR;
 	 } else {
@@ -3029,11 +3217,24 @@ void process_main(void)
      goto find_func_info;
  }
 
- OpCase(badmatch_s): {
-     GetArg1(0, tmp_arg1);
-     c_p->fvalue = tmp_arg1;
-     c_p->freason = BADMATCH;
- }
+    {
+	Eterm badmatch_val;
+
+    OpCase(badmatch_y):
+	badmatch_val = yb(Arg(0));
+	goto do_badmatch;
+
+    OpCase(badmatch_x):
+	badmatch_val = xb(Arg(0));
+	goto do_badmatch;
+
+    OpCase(badmatch_r):
+	badmatch_val = r(0);
+
+    do_badmatch:
+	c_p->fvalue = badmatch_val;
+	c_p->freason = BADMATCH;
+    }
  /* Fall through here */
 
  find_func_info: {
@@ -3056,12 +3257,11 @@ void process_main(void)
      */
     SWAPOUT;
     reg[0] = r(0);
-    tmp_arg1 = call_error_handler(c_p, I-3, reg);
+    I = call_error_handler(c_p, I-3, reg, am_undefined_function);
     r(0) = reg[0];
     SWAPIN;
-    if (tmp_arg1) {
-	SET_I(c_p->i);
-	Dispatch();
+    if (I) {
+	Goto(*I);
     }
 
  /* Fall through */
@@ -3084,128 +3284,149 @@ void process_main(void)
      }
  }
 
- OpCase(call_nif):
-     {
-          /*
-	   * call_nif is always first instruction in function:
-	   *
-	   * I[-3]: Module
-	   * I[-2]: Function
-	   * I[-1]: Arity
-	   * I[0]: &&call_nif
-	   * I[1]: Function pointer to NIF function
-	   * I[2]: Pointer to erl_module_nif
-	   */
-     	 BifFunction vbf;
-
-	 c_p->current = I-3; /* current and vbf set to please handle_error */ 
-	 SWAPOUT;
-	 c_p->fcalls = FCALLS - 1;
-	 PROCESS_MAIN_CHK_LOCKS(c_p);
-	 tmp_arg2 = I[-1];
-	 ERTS_SMP_UNREQ_PROC_MAIN_LOCK(c_p);
+    {
+	Eterm nif_bif_result;
+	Eterm bif_nif_arity;
 
-	 ASSERT(!ERTS_PROC_IS_EXITING(c_p));
-	 {
-	     typedef Eterm NifF(struct enif_environment_t*, int argc, Eterm argv[]);
-	     NifF* fp = vbf = (NifF*) I[1];
-	     struct enif_environment_t env;
-	     erts_pre_nif(&env, c_p, (struct erl_module_nif*)I[2]);
-	     reg[0] = r(0);
-	     tmp_arg1 = (*fp)(&env, tmp_arg2, reg);
-	     erts_post_nif(&env);
-	 }
-	 ASSERT(!ERTS_PROC_IS_EXITING(c_p) || is_non_value(tmp_arg1));
-	 PROCESS_MAIN_CHK_LOCKS(c_p);
-	 goto apply_bif_or_nif_epilogue;
-	 
- OpCase(apply_bif):
-	/*
-	 * At this point, I points to the code[3] in the export entry for
-	 * the BIF:
-	 *
-	 * code[0]: Module
-	 * code[1]: Function
-	 * code[2]: Arity
-	 * code[3]: &&apply_bif
-	 * code[4]: Function pointer to BIF function
-	 */
+    OpCase(call_nif):
+	{
+	    /*
+	     * call_nif is always first instruction in function:
+	     *
+	     * I[-3]: Module
+	     * I[-2]: Function
+	     * I[-1]: Arity
+	     * I[0]: &&call_nif
+	     * I[1]: Function pointer to NIF function
+	     * I[2]: Pointer to erl_module_nif
+	     */
+	    BifFunction vbf;
 
-	c_p->current = I-3;	/* In case we apply process_info/1,2 or load_nif/1 */
-	c_p->i = I;		/* In case we apply check_process_code/2. */
-	c_p->arity = 0;		/* To allow garbage collection on ourselves
-				 * (check_process_code/2).
-				 */
-	SWAPOUT;
-	c_p->fcalls = FCALLS - 1;
-	vbf = (BifFunction) Arg(0);
-	PROCESS_MAIN_CHK_LOCKS(c_p);
-	tmp_arg2 = I[-1];
-	ASSERT(tmp_arg2 <= 3);
-	ERTS_SMP_UNREQ_PROC_MAIN_LOCK(c_p);
-	switch (tmp_arg2) {
-	case 3:
+	    c_p->current = I-3; /* current and vbf set to please handle_error */ 
+	    SWAPOUT;
+	    c_p->fcalls = FCALLS - 1;
+	    PROCESS_MAIN_CHK_LOCKS(c_p);
+	    bif_nif_arity = I[-1];
+	    ERTS_SMP_UNREQ_PROC_MAIN_LOCK(c_p);
+	    ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
+
+	    ASSERT(!ERTS_PROC_IS_EXITING(c_p));
 	    {
-		Eterm (*bf)(Process*, Eterm, Eterm, Eterm, BeamInstr*) = vbf;
-		ASSERT(!ERTS_PROC_IS_EXITING(c_p));
-		tmp_arg1 = (*bf)(c_p, r(0), x(1), x(2), I);
-		ASSERT(!ERTS_PROC_IS_EXITING(c_p) || is_non_value(tmp_arg1));
-		PROCESS_MAIN_CHK_LOCKS(c_p);
+		typedef Eterm NifF(struct enif_environment_t*, int argc, Eterm argv[]);
+		NifF* fp = vbf = (NifF*) I[1];
+		struct enif_environment_t env;
+		erts_pre_nif(&env, c_p, (struct erl_module_nif*)I[2]);
+		reg[0] = r(0);
+		nif_bif_result = (*fp)(&env, bif_nif_arity, reg);
+		erts_post_nif(&env);
 	    }
-	    break;
-	case 2:
-	    {
-		Eterm (*bf)(Process*, Eterm, Eterm, BeamInstr*) = vbf;
-		ASSERT(!ERTS_PROC_IS_EXITING(c_p));
-		tmp_arg1 = (*bf)(c_p, r(0), x(1), I);
-		ASSERT(!ERTS_PROC_IS_EXITING(c_p) || is_non_value(tmp_arg1));
-		PROCESS_MAIN_CHK_LOCKS(c_p);
+	    ASSERT(!ERTS_PROC_IS_EXITING(c_p) || is_non_value(nif_bif_result));
+	    PROCESS_MAIN_CHK_LOCKS(c_p);
+	    ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
+	    goto apply_bif_or_nif_epilogue;
+	 
+	OpCase(apply_bif):
+	    /*
+	     * At this point, I points to the code[3] in the export entry for
+	     * the BIF:
+	     *
+	     * code[0]: Module
+	     * code[1]: Function
+	     * code[2]: Arity
+	     * code[3]: &&apply_bif
+	     * code[4]: Function pointer to BIF function
+	     */
+
+	    c_p->current = I-3;	/* In case we apply process_info/1,2 or load_nif/1 */
+	    c_p->i = I;		/* In case we apply check_process_code/2. */
+	    c_p->arity = 0;		/* To allow garbage collection on ourselves
+					 * (check_process_code/2).
+					 */
+	    SWAPOUT;
+	    c_p->fcalls = FCALLS - 1;
+	    vbf = (BifFunction) Arg(0);
+	    PROCESS_MAIN_CHK_LOCKS(c_p);
+	    bif_nif_arity = I[-1];
+	    ASSERT(bif_nif_arity <= 3);
+	    ERTS_SMP_UNREQ_PROC_MAIN_LOCK(c_p);
+	    ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
+	    switch (bif_nif_arity) {
+	    case 3:
+		{
+		    Eterm (*bf)(Process*, Eterm, Eterm, Eterm, BeamInstr*) = vbf;
+		    ASSERT(!ERTS_PROC_IS_EXITING(c_p));
+		    nif_bif_result = (*bf)(c_p, r(0), x(1), x(2), I);
+		    ASSERT(!ERTS_PROC_IS_EXITING(c_p) ||
+			   is_non_value(nif_bif_result));
+		    ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
+		    PROCESS_MAIN_CHK_LOCKS(c_p);
+		}
+		break;
+	    case 2:
+		{
+		    Eterm (*bf)(Process*, Eterm, Eterm, BeamInstr*) = vbf;
+		    ASSERT(!ERTS_PROC_IS_EXITING(c_p));
+		    nif_bif_result = (*bf)(c_p, r(0), x(1), I);
+		    ASSERT(!ERTS_PROC_IS_EXITING(c_p) ||
+			   is_non_value(nif_bif_result));
+		    ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
+		    PROCESS_MAIN_CHK_LOCKS(c_p);
+		}
+		break;
+	    case 1:
+		{
+		    Eterm (*bf)(Process*, Eterm, BeamInstr*) = vbf;
+		    ASSERT(!ERTS_PROC_IS_EXITING(c_p));
+		    nif_bif_result = (*bf)(c_p, r(0), I);
+		    ASSERT(!ERTS_PROC_IS_EXITING(c_p) ||
+			   is_non_value(nif_bif_result));
+		    ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
+		    PROCESS_MAIN_CHK_LOCKS(c_p);
+		}
+		break;
+	    case 0:
+		{
+		    Eterm (*bf)(Process*, BeamInstr*) = vbf;
+		    ASSERT(!ERTS_PROC_IS_EXITING(c_p));
+		    nif_bif_result = (*bf)(c_p, I);
+		    ASSERT(!ERTS_PROC_IS_EXITING(c_p) ||
+			   is_non_value(nif_bif_result));
+		    ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
+		    PROCESS_MAIN_CHK_LOCKS(c_p);
+		    break;
+		}
+	    default:
+		erl_exit(1, "apply_bif: invalid arity: %u\n",
+			 bif_nif_arity);
 	    }
-	    break;
-	case 1:
-	    {
-		Eterm (*bf)(Process*, Eterm, BeamInstr*) = vbf;
-		ASSERT(!ERTS_PROC_IS_EXITING(c_p));
-		tmp_arg1 = (*bf)(c_p, r(0), I);
-		ASSERT(!ERTS_PROC_IS_EXITING(c_p) || is_non_value(tmp_arg1));
-		PROCESS_MAIN_CHK_LOCKS(c_p);
+
+	apply_bif_or_nif_epilogue:
+	    ERTS_SMP_REQ_PROC_MAIN_LOCK(c_p);
+	    ERTS_HOLE_CHECK(c_p);
+	    if (c_p->mbuf) {
+		reg[0] = r(0);
+		nif_bif_result = erts_gc_after_bif_call(c_p, nif_bif_result,
+						  reg, bif_nif_arity);
+		r(0) = reg[0];
 	    }
-	    break;
-	case 0:
-	    {
-		Eterm (*bf)(Process*, BeamInstr*) = vbf;
-		ASSERT(!ERTS_PROC_IS_EXITING(c_p));
-		tmp_arg1 = (*bf)(c_p, I);
-		ASSERT(!ERTS_PROC_IS_EXITING(c_p) || is_non_value(tmp_arg1));
-		PROCESS_MAIN_CHK_LOCKS(c_p);
-		break;
+	    SWAPIN;  /* There might have been a garbage collection. */
+	    FCALLS = c_p->fcalls;
+	    if (is_value(nif_bif_result)) {
+		r(0) = nif_bif_result;
+		CHECK_TERM(r(0));
+		SET_I(c_p->cp);
+		Goto(*I);
+	    } else if (c_p->freason == TRAP) {
+		SET_I(*((BeamInstr **) (UWord) ((c_p)->def_arg_reg + 3)));
+		r(0) = c_p->def_arg_reg[0];
+		x(1) = c_p->def_arg_reg[1];
+		x(2) = c_p->def_arg_reg[2];
+		Dispatch();
 	    }
-	}
-apply_bif_or_nif_epilogue:
-	ERTS_SMP_REQ_PROC_MAIN_LOCK(c_p);
-	ERTS_HOLE_CHECK(c_p);
-	if (c_p->mbuf) {
 	    reg[0] = r(0);
-	    tmp_arg1 = erts_gc_after_bif_call(c_p, tmp_arg1, reg, tmp_arg2);
-	    r(0) = reg[0];
+	    I = handle_error(c_p, c_p->cp, reg, vbf);
+	    goto post_error_handling;
 	}
-	SWAPIN;			/* There might have been a garbage collection. */
-	FCALLS = c_p->fcalls;
-	if (is_value(tmp_arg1)) {
-	    r(0) = tmp_arg1;
-	    CHECK_TERM(r(0));
-	    SET_I(c_p->cp);
-	    Goto(*I);
-	} else if (c_p->freason == TRAP) {
-	    SET_I(*((BeamInstr **) (UWord) ((c_p)->def_arg_reg + 3)));
-	    r(0) = c_p->def_arg_reg[0];
-	    x(1) = c_p->def_arg_reg[1];
-	    x(2) = c_p->def_arg_reg[2];
-	    Dispatch();
-	}
-	reg[0] = r(0);
-	I = handle_error(c_p, c_p->cp, reg, vbf);
-	goto post_error_handling;
     }
 
  OpCase(i_get_sd):
@@ -3218,11 +3439,25 @@ apply_bif_or_nif_epilogue:
 	StoreBifResult(1, result);
     }
 
- OpCase(case_end_s):
-    GetArg1(0, tmp_arg1);
-    c_p->fvalue = tmp_arg1;
-    c_p->freason = EXC_CASE_CLAUSE;
-    goto find_func_info;
+    {
+	Eterm case_end_val;
+
+    OpCase(case_end_x):
+	case_end_val = xb(Arg(0));
+	goto do_case_end;
+
+    OpCase(case_end_y):
+	case_end_val = yb(Arg(0));
+	goto do_case_end;
+
+    OpCase(case_end_r):
+	case_end_val = r(0);
+
+    do_case_end:
+	c_p->fvalue = case_end_val;
+	c_p->freason = EXC_CASE_CLAUSE;
+	goto find_func_info;
+    }
 
  OpCase(if_end):
     c_p->freason = EXC_IF_CLAUSE;
@@ -3235,10 +3470,13 @@ apply_bif_or_nif_epilogue:
  }
 
  OpCase(try_case_end_s):
-    GetArg1(0, tmp_arg1);
-    c_p->fvalue = tmp_arg1;
-    c_p->freason = EXC_TRY_CLAUSE;
-    goto find_func_info;
+    {
+	Eterm try_case_end_val;
+	GetArg1(0, try_case_end_val);
+	c_p->fvalue = try_case_end_val;
+	c_p->freason = EXC_TRY_CLAUSE;
+	goto find_func_info;
+    }
 
  /*
   * Construction of binaries using new instructions.
@@ -3786,19 +4024,20 @@ apply_bif_or_nif_epilogue:
      Eterm header;
      BeamInstr *next;
      Uint slots;
+     Eterm context;
 
      OpCase(i_bs_start_match2_rfIId): {
-	 tmp_arg1 = r(0);
+	 context = r(0);
 
      do_start_match:
 	 slots = Arg(2);
-	 if (!is_boxed(tmp_arg1)) {
+	 if (!is_boxed(context)) {
 	     ClauseFail();
 	 }
 	 PreFetch(4, next);
-	 header = *boxed_val(tmp_arg1);
+	 header = *boxed_val(context);
 	 if (header_is_bin_matchstate(header)) {
-	     ErlBinMatchState* ms = (ErlBinMatchState *) boxed_val(tmp_arg1);
+	     ErlBinMatchState* ms = (ErlBinMatchState *) boxed_val(context);
 	     Uint actual_slots = HEADER_NUM_SLOTS(header);
 	     ms->save_offset[0] = ms->mb.offset;
 	     if (actual_slots < slots) {
@@ -3806,8 +4045,8 @@ apply_bif_or_nif_epilogue:
 		 Uint live = Arg(1);
 		 Uint wordsneeded = ERL_BIN_MATCHSTATE_SIZE(slots);
 
-		 TestHeapPreserve(wordsneeded, live, tmp_arg1);
-		 ms = (ErlBinMatchState *) boxed_val(tmp_arg1);
+		 TestHeapPreserve(wordsneeded, live, context);
+		 ms = (ErlBinMatchState *) boxed_val(context);
 		 dst = (ErlBinMatchState *) HTOP;
 		 *dst = *ms;
 		 *HTOP = HEADER_BIN_MATCHSTATE(slots);
@@ -3819,12 +4058,12 @@ apply_bif_or_nif_epilogue:
 	     Eterm result;
 	     Uint live = Arg(1);
 	     Uint wordsneeded = ERL_BIN_MATCHSTATE_SIZE(slots);
-	     TestHeapPreserve(wordsneeded, live, tmp_arg1);
+	     TestHeapPreserve(wordsneeded, live, context);
 	     HEAP_TOP(c_p) = HTOP;
 #ifdef DEBUG
 	     c_p->stop = E;	/* Needed for checking in HeapOnlyAlloc(). */
 #endif
-	     result = erts_bs_start_match_2(c_p, tmp_arg1, slots);
+	     result = erts_bs_start_match_2(c_p, context, slots);
 	     HTOP = HEAP_TOP(c_p);
 	     HEAP_SPACE_VERIFIED(0);
 	     if (is_non_value(result)) {
@@ -3838,12 +4077,12 @@ apply_bif_or_nif_epilogue:
 	 NextPF(4, next);
      }
      OpCase(i_bs_start_match2_xfIId): {
-	 tmp_arg1 = xb(Arg(0));
+	 context = xb(Arg(0));
 	 I++;
 	 goto do_start_match;
      }
      OpCase(i_bs_start_match2_yfIId): {
-	 tmp_arg1 = yb(Arg(0));
+	 context = yb(Arg(0));
 	 I++;
 	 goto do_start_match;
      }
@@ -3936,93 +4175,105 @@ apply_bif_or_nif_epilogue:
      NextPF(2, next);
  }
 
+ {
+     Eterm bs_get_integer8_context;
+
  OpCase(i_bs_get_integer_8_rfd): {
-     tmp_arg1 = r(0);
-     goto do_bs_get_integer_8;
- }
+	 bs_get_integer8_context = r(0);
+	 goto do_bs_get_integer_8;
+     }
 
  OpCase(i_bs_get_integer_8_xfd): {
-     tmp_arg1 = xb(Arg(0));
-     I++;
- }
+	 bs_get_integer8_context = xb(Arg(0));
+	 I++;
+     }
 
  do_bs_get_integer_8: {
-     ErlBinMatchBuffer *_mb;
-     Eterm _result;
-     _mb = ms_matchbuffer(tmp_arg1);
-     if (_mb->size - _mb->offset < 8) {
-	 ClauseFail();
-     }
-     if (BIT_OFFSET(_mb->offset) != 0) {
-	 _result = erts_bs_get_integer_2(c_p, 8, 0, _mb);
-     } else {
-	 _result = make_small(_mb->base[BYTE_OFFSET(_mb->offset)]);
-	 _mb->offset += 8;
+	 ErlBinMatchBuffer *_mb;
+	 Eterm _result;
+	 _mb = ms_matchbuffer(bs_get_integer8_context);
+	 if (_mb->size - _mb->offset < 8) {
+	     ClauseFail();
+	 }
+	 if (BIT_OFFSET(_mb->offset) != 0) {
+	     _result = erts_bs_get_integer_2(c_p, 8, 0, _mb);
+	 } else {
+	     _result = make_small(_mb->base[BYTE_OFFSET(_mb->offset)]);
+	     _mb->offset += 8;
+	 }
+	 StoreBifResult(1, _result);
      }
-     StoreBifResult(1, _result);
  }
 
- OpCase(i_bs_get_integer_16_rfd): {
-     tmp_arg1 = r(0);
+ {
+     Eterm bs_get_integer_16_context;
+
+ OpCase(i_bs_get_integer_16_rfd):
+     bs_get_integer_16_context = r(0);
      goto do_bs_get_integer_16;
- }
 
- OpCase(i_bs_get_integer_16_xfd): {
-     tmp_arg1 = xb(Arg(0));
+ OpCase(i_bs_get_integer_16_xfd):
+     bs_get_integer_16_context = xb(Arg(0));
      I++;
- }
 
- do_bs_get_integer_16: {
-     ErlBinMatchBuffer *_mb;
-     Eterm _result;
-     _mb = ms_matchbuffer(tmp_arg1);
-     if (_mb->size - _mb->offset < 16) {
-	 ClauseFail();
-     }
-     if (BIT_OFFSET(_mb->offset) != 0) {
-	 _result = erts_bs_get_integer_2(c_p, 16, 0, _mb);
-     } else {
-	 _result = make_small(get_int16(_mb->base+BYTE_OFFSET(_mb->offset)));
-	 _mb->offset += 16;
+ do_bs_get_integer_16:
+     {
+	 ErlBinMatchBuffer *_mb;
+	 Eterm _result;
+	 _mb = ms_matchbuffer(bs_get_integer_16_context);
+	 if (_mb->size - _mb->offset < 16) {
+	     ClauseFail(); 
+	 }
+	 if (BIT_OFFSET(_mb->offset) != 0) {
+	     _result = erts_bs_get_integer_2(c_p, 16, 0, _mb);
+	 } else {
+	     _result = make_small(get_int16(_mb->base+BYTE_OFFSET(_mb->offset)));
+	     _mb->offset += 16;
+	 }
+	 StoreBifResult(1, _result);
      }
-     StoreBifResult(1, _result);
  }
 
- OpCase(i_bs_get_integer_32_rfId): {
-     tmp_arg1 = r(0);
+ {
+     Eterm bs_get_integer_32_context;
+
+ OpCase(i_bs_get_integer_32_rfId):
+     bs_get_integer_32_context = r(0);
      goto do_bs_get_integer_32;
- }
+
      
- OpCase(i_bs_get_integer_32_xfId): {
-     tmp_arg1 = xb(Arg(0));
+ OpCase(i_bs_get_integer_32_xfId):
+     bs_get_integer_32_context = xb(Arg(0));
      I++;
- }
 
- do_bs_get_integer_32: {
-     ErlBinMatchBuffer *_mb;
-     Uint32 _integer;
-     Eterm _result;
-     _mb = ms_matchbuffer(tmp_arg1);
-     if (_mb->size - _mb->offset < 32) { ClauseFail(); }
-     if (BIT_OFFSET(_mb->offset) != 0) {
-	 _integer = erts_bs_get_unaligned_uint32(_mb);
-     } else {
-	 _integer = get_int32(_mb->base + _mb->offset/8);
-     }
-     _mb->offset += 32;
+
+ do_bs_get_integer_32:
+     {
+	 ErlBinMatchBuffer *_mb;
+	 Uint32 _integer;
+	 Eterm _result;
+	 _mb = ms_matchbuffer(bs_get_integer_32_context);
+	 if (_mb->size - _mb->offset < 32) { ClauseFail(); }
+	 if (BIT_OFFSET(_mb->offset) != 0) {
+	     _integer = erts_bs_get_unaligned_uint32(_mb);
+	 } else {
+	     _integer = get_int32(_mb->base + _mb->offset/8);
+	 }
+	 _mb->offset += 32;
 #if !defined(ARCH_64) || HALFWORD_HEAP
-     if (IS_USMALL(0, _integer)) {
+	 if (IS_USMALL(0, _integer)) {
 #endif
-	 _result = make_small(_integer);
+	     _result = make_small(_integer);
 #if !defined(ARCH_64) || HALFWORD_HEAP
-     } else {
-	 TestHeap(BIG_UINT_HEAP_SIZE, Arg(1));
-	 _result = uint_to_big((Uint) _integer, HTOP);
-	 HTOP += BIG_UINT_HEAP_SIZE;
-	 HEAP_SPACE_VERIFIED(0);
-     }
+	 } else {
+	     TestHeap(BIG_UINT_HEAP_SIZE, Arg(1));
+	     _result = uint_to_big((Uint) _integer, HTOP);
+	     HTOP += BIG_UINT_HEAP_SIZE;
+	     HEAP_SPACE_VERIFIED(0);
+	 }
 #endif
-     StoreBifResult(2, _result);
+	 StoreBifResult(2, _result);
+     }
  }
 
  /* Operands: Size Live Fail Flags Dst */
@@ -4120,54 +4371,64 @@ apply_bif_or_nif_epilogue:
      StoreBifResult(3, result);
  }
 
- /* Operands: MatchContext Fail Dst */
+ {
+     Eterm get_utf8_context;
+
+     /* Operands: MatchContext Fail Dst */
  OpCase(i_bs_get_utf8_rfd): {
-     tmp_arg1 = r(0);
-     goto do_bs_get_utf8;
- }
+	 get_utf8_context = r(0);
+	 goto do_bs_get_utf8;
+     }
 
  OpCase(i_bs_get_utf8_xfd): {
-     tmp_arg1 = xb(Arg(0));
-     I++;
- }
+	 get_utf8_context = xb(Arg(0));
+	 I++;
+     }
 
- /*
-  * tmp_arg1 = match_context
-  * Operands: Fail Dst
-  */
+     /*
+      * get_utf8_context = match_context
+      * Operands: Fail Dst
+      */
 
-    do_bs_get_utf8: {
-     Eterm result = erts_bs_get_utf8(ms_matchbuffer(tmp_arg1));
-     if (is_non_value(result)) {
-	 ClauseFail();
+ do_bs_get_utf8: {
+	 Eterm result = erts_bs_get_utf8(ms_matchbuffer(get_utf8_context));
+	 if (is_non_value(result)) {
+	     ClauseFail();
+	 }
+	 StoreBifResult(1, result);
      }
-     StoreBifResult(1, result);
  }
 
- /* Operands: MatchContext Fail Flags Dst */
+ {
+     Eterm get_utf16_context;
+
+     /* Operands: MatchContext Fail Flags Dst */
  OpCase(i_bs_get_utf16_rfId): {
-     tmp_arg1 = r(0);
-     goto do_bs_get_utf16;
- }
+	 get_utf16_context = r(0);
+	 goto do_bs_get_utf16;
+     }
 
  OpCase(i_bs_get_utf16_xfId): {
-     tmp_arg1 = xb(Arg(0));
-     I++;
- }
+	 get_utf16_context = xb(Arg(0));
+	 I++;
+     }
 
- /*
-  * tmp_arg1 = match_context
-  * Operands: Fail Flags Dst
-  */
-    do_bs_get_utf16: {
-     Eterm result = erts_bs_get_utf16(ms_matchbuffer(tmp_arg1), Arg(1));
-     if (is_non_value(result)) {
-	 ClauseFail();
+     /*
+      * get_utf16_context = match_context
+      * Operands: Fail Flags Dst
+      */
+ do_bs_get_utf16: {
+	 Eterm result = erts_bs_get_utf16(ms_matchbuffer(get_utf16_context),
+					  Arg(1));
+	 if (is_non_value(result)) {
+	     ClauseFail();
+	 }
+	 StoreBifResult(2, result);
      }
-     StoreBifResult(2, result);
  }
 
  {
+     Eterm context_to_binary_context;
      ErlBinMatchBuffer* mb;
      ErlSubBin* sb;
      Uint size;
@@ -4176,27 +4437,29 @@ apply_bif_or_nif_epilogue:
      Uint hole_size;
 
      OpCase(bs_context_to_binary_r): {
-	 tmp_arg1 = x0;
+	 context_to_binary_context = x0;
 	 I -= 2;
 	 goto do_context_to_binary;
      }
 
      /* Unfortunately, inlining can generate this instruction. */
      OpCase(bs_context_to_binary_y): {
-	 tmp_arg1 = yb(Arg(0));
+	 context_to_binary_context = yb(Arg(0));
 	 goto do_context_to_binary0;
      }
 
      OpCase(bs_context_to_binary_x): {
-	 tmp_arg1 = xb(Arg(0));
+	 context_to_binary_context = xb(Arg(0));
      
      do_context_to_binary0:
 	 I--;
      }
 
  do_context_to_binary:
-     if (is_boxed(tmp_arg1) && header_is_bin_matchstate(*boxed_val(tmp_arg1))) {
-	 ErlBinMatchState* ms = (ErlBinMatchState *) boxed_val(tmp_arg1);
+     if (is_boxed(context_to_binary_context) &&
+	 header_is_bin_matchstate(*boxed_val(context_to_binary_context))) {
+	 ErlBinMatchState* ms;
+	 ms = (ErlBinMatchState *) boxed_val(context_to_binary_context);
 	 mb = &ms->mb;
 	 offs = ms->save_offset[0];
 	 size = mb->size - offs;
@@ -4205,17 +4468,17 @@ apply_bif_or_nif_epilogue:
      Next(2);
 
      OpCase(i_bs_get_binary_all_reuse_rfI): {
-	 tmp_arg1 = x0;
+	 context_to_binary_context = x0;
 	 goto do_bs_get_binary_all_reuse;
      }
 
      OpCase(i_bs_get_binary_all_reuse_xfI): {
-	 tmp_arg1 = xb(Arg(0));
+	 context_to_binary_context = xb(Arg(0));
 	 I++;
      }
 
  do_bs_get_binary_all_reuse:
-     mb = ms_matchbuffer(tmp_arg1);
+     mb = ms_matchbuffer(context_to_binary_context);
      size = mb->size - mb->offset;
      if (size % Arg(1) != 0) {
 	 ClauseFail();
@@ -4224,7 +4487,7 @@ apply_bif_or_nif_epilogue:
 
  do_bs_get_binary_all_reuse_common:
      orig = mb->orig;
-     sb = (ErlSubBin *) boxed_val(tmp_arg1);
+     sb = (ErlSubBin *) boxed_val(context_to_binary_context);
      hole_size = 1 + header_arity(sb->thing_word) - ERL_SUB_BIN_SIZE;
      sb->thing_word = HEADER_SUB_BIN;
      sb->size = BYTE_OFFSET(size);
@@ -4240,12 +4503,14 @@ apply_bif_or_nif_epilogue:
  }
 
  {
+     Eterm match_string_context;
+
      OpCase(i_bs_match_string_rfII): {
-	 tmp_arg1 = r(0);
+	 match_string_context = r(0);
 	 goto do_bs_match_string;
      }
      OpCase(i_bs_match_string_xfII): {
-	 tmp_arg1 = xb(Arg(0));
+	 match_string_context = xb(Arg(0));
 	 I++;
      }
 
@@ -4260,7 +4525,7 @@ apply_bif_or_nif_epilogue:
 	 PreFetch(3, next);
 	 bits = Arg(1);
 	 bytes = (byte *) Arg(2);
-	 mb = ms_matchbuffer(tmp_arg1);
+	 mb = ms_matchbuffer(match_string_context);
 	 if (mb->size - mb->offset < bits) {
 	     ClauseFail();
 	 }
@@ -4353,6 +4618,7 @@ apply_bif_or_nif_epilogue:
 	 ERTS_SMP_UNREQ_PROC_MAIN_LOCK(c_p);
 	 flags = erts_call_trace(c_p, ep->code, ep->match_prog_set, reg,
 				 0, &c_p->tracer_proc);
+	 ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 	 ERTS_SMP_REQ_PROC_MAIN_LOCK(c_p);
 	 PROCESS_MAIN_CHK_LOCKS(c_p);
 	 ASSERT(!ERTS_PROC_IS_EXITING(c_p));
@@ -4364,6 +4630,7 @@ apply_bif_or_nif_epilogue:
 		 /* SWAPOUT, SWAPIN was done and r(0) was saved above */
 		 PROCESS_MAIN_CHK_LOCKS(c_p);
 		 FCALLS -= erts_garbage_collect(c_p, 3, reg, ep->code[2]);
+		 ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 		 PROCESS_MAIN_CHK_LOCKS(c_p);
 		 r(0) = reg[0];
 		 SWAPIN;
@@ -4453,6 +4720,7 @@ apply_bif_or_nif_epilogue:
 		 reg[0] = r(0);
 		 PROCESS_MAIN_CHK_LOCKS(c_p);
 		 FCALLS -= erts_garbage_collect(c_p, 2, reg, I[-1]);
+		 ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 		 PROCESS_MAIN_CHK_LOCKS(c_p);
 		 r(0) = reg[0];
 	     }
@@ -4556,6 +4824,7 @@ apply_bif_or_nif_epilogue:
 	     /* SWAPOUT was done and r(0) was saved above */
 	     PROCESS_MAIN_CHK_LOCKS(c_p);
 	     FCALLS -= erts_garbage_collect(c_p, need, reg, I[-1]);
+	     ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 	     PROCESS_MAIN_CHK_LOCKS(c_p);
 	     r(0) = reg[0];
 	     SWAPIN;
@@ -4723,7 +4992,7 @@ apply_bif_or_nif_epilogue:
      NextPF(2, next);
  }
 
- OpCase(fmove_new_ld): {
+ OpCase(fmove_ld): {
      Eterm fr = Arg(0);
      Eterm dest = make_float(HTOP);
 
@@ -4753,11 +5022,6 @@ apply_bif_or_nif_epilogue:
      NextPF(2, next);
  }
 
- /*
-  * Old allocating fmove.
-  */
-
-
 #ifdef NO_FPE_SIGNALS
      OpCase(fclearerror):
      OpCase(i_fcheckerror):
@@ -4969,12 +5233,11 @@ apply_bif_or_nif_epilogue:
  OpCase(i_debug_breakpoint): {
      SWAPOUT;
      reg[0] = r(0);
-     tmp_arg1 = call_breakpoint_handler(c_p, I-3, reg);
+     I = call_error_handler(c_p, I-3, reg, am_breakpoint);
      r(0) = reg[0];
      SWAPIN;
-     if (tmp_arg1) {
-	 SET_I(c_p->i);
-	 Dispatch();
+     if (I) {
+	 Goto(*I);
      }
      goto no_error_handler;
  }
@@ -5633,9 +5896,6 @@ build_stacktrace(Process* c_p, Eterm exc) {
     Eterm  args;
     int    depth;
     BeamInstr* current;
-#if HALFWORD_HEAP
-    BeamInstr current_buff[3];
-#endif
     Eterm  Where = NIL;
     Eterm *next_p = &Where;
 
@@ -5665,14 +5925,7 @@ build_stacktrace(Process* c_p, Eterm exc) {
      * (e.g. spawn_link(erlang, abs, [1])).
      */
     if (current == NULL) {
-#if HALFWORD_HEAP
-	current = current_buff;
-	current[0] = (BeamInstr) c_p->initial[0];
-	current[1] = (BeamInstr) c_p->initial[1];
-	current[2] = (BeamInstr) c_p->initial[2];
-#else
 	current = c_p->initial;
-#endif
 	args = am_true; /* Just in case */
     } else {
 	args = get_args_from_exc(exc);
@@ -5724,8 +5977,8 @@ build_stacktrace(Process* c_p, Eterm exc) {
 }
 
 
-static Eterm
-call_error_handler(Process* p, BeamInstr* fi, Eterm* reg)
+static BeamInstr*
+call_error_handler(Process* p, BeamInstr* fi, Eterm* reg, Eterm func)
 {
     Eterm* hp;
     Export* ep;
@@ -5737,62 +5990,12 @@ call_error_handler(Process* p, BeamInstr* fi, Eterm* reg)
     /*
      * Search for the error_handler module.
      */
-    ep = erts_find_function(erts_proc_get_error_handler(p),
-			    am_undefined_function, 3);
-    if (ep == NULL) {		/* No error handler */
-	p->current = fi;
-	p->freason = EXC_UNDEF;
-	return 0;
-    }
-    p->i = ep->address;
-
-    /*
-     * Create a list with all arguments in the x registers.
-     */
-
-    arity = fi[2];
-    sz = 2 * arity;
-    if (HeapWordsLeft(p) < sz) {
-	erts_garbage_collect(p, sz, reg, arity);
-    }
-    hp = HEAP_TOP(p);
-    HEAP_TOP(p) += sz;
-    args = NIL;
-    for (i = arity-1; i >= 0; i--) {
-	args = CONS(hp, reg[i], args);
-	hp += 2;
-    }
-
-    /*
-     * Set up registers for call to error_handler:undefined_function/3.
-     */
-    reg[0] = fi[0];
-    reg[1] = fi[1];
-    reg[2] = args;
-    return 1;
-}
-
-static Eterm
-call_breakpoint_handler(Process* p, BeamInstr* fi, Eterm* reg)
-{
-    Eterm* hp;
-    Export* ep;
-    int arity;
-    Eterm args;
-    Uint sz;
-    int i;
-
-    /*
-     * Search for error handler module.
-     */
-    ep = erts_find_function(erts_proc_get_error_handler(p),
-			    am_breakpoint, 3);
+    ep = erts_find_function(erts_proc_get_error_handler(p), func, 3);
     if (ep == NULL) {		/* No error handler */
 	p->current = fi;
 	p->freason = EXC_UNDEF;
 	return 0;
     }
-    p->i = ep->address;
 
     /*
      * Create a list with all arguments in the x registers.
@@ -5812,15 +6015,14 @@ call_breakpoint_handler(Process* p, BeamInstr* fi, Eterm* reg)
     }
 
     /*
-     * Set up registers for call to error_handler:breakpoint/3.
+     * Set up registers for call to error_handler:<func>/3.
      */
     reg[0] = fi[0];
     reg[1] = fi[1];
     reg[2] = args;
-    return 1;
+    return ep->address;
 }
 
-
 
 static Export*
 apply_setup_error_handler(Process* p, Eterm module, Eterm function, Uint arity, Eterm* reg)
@@ -6069,6 +6271,7 @@ hibernate(Process* c_p, Eterm module, Eterm function, Eterm args, Eterm* reg)
 	c_p->fvalue = NIL;
 	PROCESS_MAIN_CHK_LOCKS(c_p);
 	erts_garbage_collect_hibernate(c_p);
+	ERTS_VERIFY_UNUSED_TEMP_ALLOC(c_p);
 	PROCESS_MAIN_CHK_LOCKS(c_p);
 	erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_MSGQ|ERTS_PROC_LOCK_STATUS);
 	ASSERT(!ERTS_PROC_IS_EXITING(c_p));
@@ -6314,6 +6517,7 @@ new_fun(Process* p, Eterm* reg, ErlFunEntry* fe, int num_free)
     if (HEAP_LIMIT(p) - HEAP_TOP(p) <= needed) {
 	PROCESS_MAIN_CHK_LOCKS(p);
 	erts_garbage_collect(p, needed, reg, num_free);
+	ERTS_VERIFY_UNUSED_TEMP_ALLOC(p);
 	PROCESS_MAIN_CHK_LOCKS(p);
     }
     hp = p->htop;
diff --git a/erts/emulator/beam/beam_load.c b/erts/emulator/beam/beam_load.c
index df5602b040..788cb4209c 100644
--- a/erts/emulator/beam/beam_load.c
+++ b/erts/emulator/beam/beam_load.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -89,13 +89,12 @@ typedef struct {
 } Label;
 
 /*
- * Type for a operand for a generic instruction.
+ * Type for an operand for a generic instruction.
  */
 
 typedef struct {
     unsigned type;		/* Type of operand. */
-    BeamInstr val;			/* Value of operand. */
-    Uint bigarity;		/* Arity for bignumbers (only). */
+    BeamInstr val;		/* Value of operand. */
 } GenOpArg;
 
 /*
@@ -326,11 +325,6 @@ typedef struct {
     Literal* literals;		/* Array of literals. */
     LiteralPatch* literal_patches; /* Operands that need to be patched. */
     Uint total_literal_size;	/* Total heap size for all literals. */
-
-    /*
-     * Floating point.
-     */
-    int new_float_instructions;	/* New allocation scheme for floating point. */
 } LoaderState;
 
 typedef struct {
@@ -476,12 +470,14 @@ static int read_code_header(LoaderState* stp);
 static int load_code(LoaderState* stp);
 static GenOp* gen_element(LoaderState* stp, GenOpArg Fail, GenOpArg Index,
 			  GenOpArg Tuple, GenOpArg Dst);
-static GenOp* gen_split_values(LoaderState* stp, GenOpArg S, GenOpArg Fail,
+static GenOp* gen_split_values(LoaderState* stp, GenOpArg S,
+			       GenOpArg TypeFail, GenOpArg Fail,
 			       GenOpArg Size, GenOpArg* Rest);
 static GenOp* gen_select_val(LoaderState* stp, GenOpArg S, GenOpArg Fail,
 			     GenOpArg Size, GenOpArg* Rest);
-static GenOp* gen_select_big(LoaderState* stp, GenOpArg S, GenOpArg Fail,
-			     GenOpArg Size, GenOpArg* Rest);
+static GenOp* gen_select_literals(LoaderState* stp, GenOpArg S,
+				  GenOpArg Fail, GenOpArg Size,
+				  GenOpArg* Rest);
 static GenOp* const_select_val(LoaderState* stp, GenOpArg S, GenOpArg Fail,
 			       GenOpArg Size, GenOpArg* Rest);
 static GenOp* gen_func_info(LoaderState* stp, GenOpArg mod, GenOpArg Func,
@@ -818,7 +814,6 @@ init_state(LoaderState* stp)
     stp->total_literal_size = 0;
     stp->literal_patches = 0;
     stp->string_patches = 0;
-    stp->new_float_instructions = 0;
     stp->may_load_nif = 0;
     stp->on_load = 0;
 }
@@ -1618,7 +1613,6 @@ load_code(LoaderState* stp)
 			    BeamInstr val;
 			    BeamInstr words = 0;
 			    
-			    stp->new_float_instructions = 1;
 			    GetTagAndValue(stp, tag, n);
 			    VerifyTag(stp, tag, TAG_u);
 			    while (n-- > 0) {
@@ -1772,7 +1766,7 @@ load_code(LoaderState* stp)
 	    }
 
 	    stp->specific_op = specific;
-	    CodeNeed(opc[stp->specific_op].sz+2); /* Extra margin for packing */
+	    CodeNeed(opc[stp->specific_op].sz+16); /* Extra margin for packing */
 	    code[ci++] = BeamOpCode(stp->specific_op);
 	}
 	
@@ -1936,7 +1930,8 @@ load_code(LoaderState* stp)
 		}
 		code[ci++] = (BeamInstr) stp->import[i].bf;
 		break;
-	    case 'P':		/* Byte offset into tuple */
+	    case 'P':		/* Byte offset into tuple or stack */
+	    case 'Q':		/* Like 'P', but packable */
 		VerifyTag(stp, tag, TAG_u);
 		tmp = tmp_op->a[arg].val;
 		code[ci++] = (BeamInstr) ((tmp_op->a[arg].val+1) * sizeof(Eterm));
@@ -1957,84 +1952,6 @@ load_code(LoaderState* stp)
 	}
 
 	/*
-	 * Load any list arguments using the primitive tags.
-	 */
-
-	for ( ; arg < tmp_op->arity; arg++) {
-	    switch (tmp_op->a[arg].type) {
-	    case TAG_i:
-		CodeNeed(1);
-		code[ci++] = make_small(tmp_op->a[arg].val);
-		break;
-	    case TAG_u:
-	    case TAG_a:
-	    case TAG_v:
-		CodeNeed(1);
-		code[ci++] = tmp_op->a[arg].val;
-		break;
-	    case TAG_f:
-		CodeNeed(1);
-		code[ci] = stp->labels[tmp_op->a[arg].val].patches;
-		stp->labels[tmp_op->a[arg].val].patches = ci;
-		ci++;
-		break;
-	    case TAG_q:
-		{
-		    Eterm lit;
-
-		    lit = stp->literals[tmp_op->a[arg].val].term;
-		    if (is_big(lit)) {
-			Eterm* bigp;
-			Eterm *tmp;
-			Uint size;
-			Uint term_size;
-
-			bigp = big_val(lit);
-			term_size = bignum_header_arity(*bigp);
-			size = TermWords(term_size + 1);
-			CodeNeed(size);
-			tmp = (Eterm *) (code + ci);
-			*tmp++ = *bigp++;
-			while (term_size-- > 0) {
-			    *tmp++ = *bigp++;
-			}
-			ci +=size;
-		    } else if (is_float(lit)) {
-#if defined(ARCH_64) && !HALFWORD_HEAP
-			CodeNeed(1);
-			code[ci++] = float_val(stp->literals[tmp_op->a[arg].val].term)[1];
-#elif HALFWORD_HEAP
-			Eterm* fptr;
-			Uint size;
-			Eterm *tmp;
-
-			fptr = float_val(stp->literals[tmp_op->a[arg].val].term)+1;
-			size = TermWords(2);
-			CodeNeed(size);
-			tmp = (Eterm *) (code + ci);
-			*tmp++ = *fptr++;
-			*tmp = *fptr;
-			ci += size;
-#else
-			Eterm* fptr;
-
-			fptr = float_val(stp->literals[tmp_op->a[arg].val].term)+1;
-			CodeNeed(2);
-			code[ci++] = *fptr++;
-			code[ci++] = *fptr;
-#endif
-		    } else {
-			LoadError0(stp, "literal is neither float nor big");
-		    }
-		}
-		break;
-	    default:
-		LoadError1(stp, "unsupported primitive type '%c'",
-			   tag_to_letter[tmp_op->a[arg].type]);
-	    }
-	}
-
-	/*
 	 * The packing engine.
 	 */
 	if (opc[stp->specific_op].pack[0]) {
@@ -2057,6 +1974,11 @@ load_code(LoaderState* stp)
 		case '6':	/* Shift 16 steps */
 		    packed = (packed << BEAM_LOOSE_SHIFT) | code[--ci];
 		    break;
+#ifdef ARCH_64
+		case 'w':	/* Shift 32 steps */
+		    packed = (packed << BEAM_WIDE_SHIFT) | code[--ci];
+		    break;
+#endif
 		case 'p':	/* Put instruction (from stack). */
 		    code[ci++] = *--sp;
 		    break;
@@ -2072,6 +1994,58 @@ load_code(LoaderState* stp)
 	}
 
 	/*
+	 * Load any list arguments using the primitive tags.
+	 */
+
+	for ( ; arg < tmp_op->arity; arg++) {
+	    switch (tmp_op->a[arg].type) {
+	    case TAG_i:
+		CodeNeed(1);
+		code[ci++] = make_small(tmp_op->a[arg].val);
+		break;
+	    case TAG_u:
+	    case TAG_a:
+	    case TAG_v:
+		CodeNeed(1);
+		code[ci++] = tmp_op->a[arg].val;
+		break;
+	    case TAG_f:
+		CodeNeed(1);
+		code[ci] = stp->labels[tmp_op->a[arg].val].patches;
+		stp->labels[tmp_op->a[arg].val].patches = ci;
+		ci++;
+		break;
+	    case TAG_r:
+		CodeNeed(1);
+		code[ci++] = (R_REG_DEF << _TAG_PRIMARY_SIZE) |
+		    TAG_PRIMARY_HEADER;
+		break;
+	    case TAG_x:
+		CodeNeed(1);
+		code[ci++] = (tmp_op->a[arg].val << _TAG_IMMED1_SIZE) |
+		    (X_REG_DEF << _TAG_PRIMARY_SIZE) | TAG_PRIMARY_HEADER;
+		break;
+	    case TAG_y:
+		CodeNeed(1);
+		code[ci++] = (tmp_op->a[arg].val << _TAG_IMMED1_SIZE) |
+		    (Y_REG_DEF << _TAG_PRIMARY_SIZE) | TAG_PRIMARY_HEADER;
+		break;
+	    case TAG_n:
+		CodeNeed(1);
+		code[ci++] = NIL;
+		break;
+	    case TAG_q:
+		CodeNeed(1);
+		new_literal_patch(stp, ci);
+		code[ci++] = tmp_op->a[arg].val;
+		break;
+	    default:
+		LoadError1(stp, "unsupported primitive type '%c'",
+			   tag_to_letter[tmp_op->a[arg].type]);
+	    }
+	}
+
+	/*
 	 * Handle a few special cases.
 	 */
 	switch (stp->specific_op) {
@@ -2239,11 +2213,12 @@ use_jump_tab(LoaderState* stp, GenOpArg Size, GenOpArg* Rest)
 }
 
 /*
- * Predicate to test whether all values in a table are big numbers.
+ * Predicate to test whether all values in a table are either
+ * floats or bignums.
  */
 
 static int
-all_values_are_big(LoaderState* stp, GenOpArg Size, GenOpArg* Rest)
+floats_or_bignums(LoaderState* stp, GenOpArg Size, GenOpArg* Rest)
 {
     int i;
 
@@ -2255,9 +2230,6 @@ all_values_are_big(LoaderState* stp, GenOpArg Size, GenOpArg* Rest)
 	if (Rest[i].type != TAG_q) {
 	    return 0;
 	}
-	if (is_not_big(stp->literals[Rest[i].val].term)) {
-	    return 0;
-	}
 	if (Rest[i+1].type != TAG_f) {
 	    return 0;
 	}
@@ -2317,6 +2289,14 @@ mixed_types(LoaderState* stp, GenOpArg Size, GenOpArg* Rest)
     return 0;
 }
 
+static int
+same_label(LoaderState* stp, GenOpArg Target, GenOpArg Label)
+{
+    return Target.type = TAG_f && Label.type == TAG_u &&
+	Target.val == Label.val;
+}
+
+
 /*
  * Generate an instruction for element/2.
  */
@@ -2328,23 +2308,23 @@ gen_element(LoaderState* stp, GenOpArg Fail, GenOpArg Index,
     GenOp* op;
 
     NEW_GENOP(stp, op);
-    op->op = genop_i_element_4;
     op->arity = 4;
-    op->a[0] = Fail;
-    op->a[1] = Index;
-    op->a[2] = Tuple;
-    op->a[3] = Dst;
     op->next = NULL;
 
-    /*
-     * If safe, generate a faster instruction.
-     */
-
     if (Index.type == TAG_i && Index.val > 0 &&
 	(Tuple.type == TAG_r || Tuple.type == TAG_x || Tuple.type == TAG_y)) {
 	op->op = genop_i_fast_element_4;
-	op->a[1].type = TAG_u;
-	op->a[1].val = Index.val;
+	op->a[0] = Tuple;
+	op->a[1] = Fail;
+	op->a[2].type = TAG_u;
+	op->a[2].val = Index.val;
+	op->a[3] = Dst;
+    } else {
+	op->op = genop_i_element_4;
+	op->a[0] = Tuple;
+	op->a[1] = Fail;
+	op->a[2] = Index;
+	op->a[3] = Dst;
     }
 
     return op;
@@ -2595,8 +2575,6 @@ binary_too_big_bits(LoaderState* stp, GenOpArg Size)
     return Size.type == TAG_u && (((Size.val+7)/8) >> (8*sizeof(Uint)-3) != 0);
 }
 
-#define new_float_allocation(Stp) ((Stp)->new_float_instructions)
-
 static GenOp*
 gen_put_binary(LoaderState* stp, GenOpArg Fail,GenOpArg Size,
 	       GenOpArg Unit, GenOpArg Flags, GenOpArg Src)
@@ -2809,6 +2787,52 @@ gen_skip_bits2(LoaderState* stp, GenOpArg Fail, GenOpArg Ms,
     return op;
 }
 
+static GenOp*
+gen_increment(LoaderState* stp, GenOpArg Reg, GenOpArg Integer,
+	      GenOpArg Live, GenOpArg Dst)
+{
+    GenOp* op;
+
+    NEW_GENOP(stp, op);
+    op->op = genop_i_increment_4;
+    op->arity = 4;
+    op->next = NULL;
+    op->a[0] = Reg;
+    op->a[1].type = TAG_u;
+    op->a[1].val = Integer.val;
+    op->a[2] = Live;
+    op->a[3] = Dst;
+    return op;
+}
+
+static GenOp*
+gen_increment_from_minus(LoaderState* stp, GenOpArg Reg, GenOpArg Integer,
+			 GenOpArg Live, GenOpArg Dst)
+{
+    GenOp* op;
+
+    NEW_GENOP(stp, op);
+    op->op = genop_i_increment_4;
+    op->arity = 4;
+    op->next = NULL;
+    op->a[0] = Reg;
+    op->a[1].type = TAG_u;
+    op->a[1].val = -Integer.val;
+    op->a[2] = Live;
+    op->a[3] = Dst;
+    return op;
+}
+
+/*
+ * Test whether the negation of the given number is small.
+ */
+static int
+negation_is_small(LoaderState* stp, GenOpArg Int)
+{
+    return Int.type == TAG_i && IS_SSMALL(-Int.val);
+}
+
+
 static int
 smp(LoaderState* stp)
 {
@@ -3000,6 +3024,21 @@ gen_select_tuple_arity(LoaderState* stp, GenOpArg S, GenOpArg Fail,
 	ASSERT(op->a[i].val < op->a[i+2].val);
     }
 #endif
+
+    /*
+     * Use a special-cased instruction if there are only two values.
+     */
+    if (size == 2) {
+	op->op = genop_i_select_tuple_arity2_6;
+	op->arity--;
+	op->a[2].type = TAG_u;
+	op->a[2].val = arityval(op->a[3].val);
+	op->a[3] = op->a[4];
+	op->a[4].type = TAG_u;
+	op->a[4].val = arityval(op->a[5].val);
+	op->a[5] = op->a[6];
+    }
+
     return op;
 }
 
@@ -3009,18 +3048,24 @@ gen_select_tuple_arity(LoaderState* stp, GenOpArg S, GenOpArg Fail,
  */
 
 static GenOp*
-gen_split_values(LoaderState* stp, GenOpArg S, GenOpArg Fail,
-		 GenOpArg Size, GenOpArg* Rest)
+gen_split_values(LoaderState* stp, GenOpArg S, GenOpArg TypeFail,
+		 GenOpArg Fail, GenOpArg Size, GenOpArg* Rest)
 
 {
     GenOp* op1;
     GenOp* op2;
     GenOp* label;
-    Uint type;
+    GenOp* is_integer;
     int i;
 
     ASSERT(Size.val >= 2 && Size.val % 2 == 0);
 
+    NEW_GENOP(stp, is_integer);
+    is_integer->op = genop_is_integer_2;
+    is_integer->arity = 2;
+    is_integer->a[0] = TypeFail;
+    is_integer->a[1] = S;
+
     NEW_GENOP(stp, label);
     label->op = genop_label_1;
     label->arity = 1;
@@ -3046,15 +3091,13 @@ gen_split_values(LoaderState* stp, GenOpArg S, GenOpArg Fail,
     op2->a[2].type = TAG_u;
     op2->a[2].val = 0;
 
-    op1->next = label;
-    label->next = op2;
-    op2->next = NULL;
-
-    type = Rest[0].type;
+    /*
+     * Split the list.
+     */
 
     ASSERT(Size.type == TAG_u);
     for (i = 0; i < Size.val; i += 2) {
-	GenOp* op = (Rest[i].type == type) ? op1 : op2;
+	GenOp* op = (Rest[i].type == TAG_q) ? op2 : op1;
 	int dst = 3 + op->a[2].val;
 
 	ASSERT(Rest[i+1].type == TAG_f);
@@ -3063,13 +3106,36 @@ gen_split_values(LoaderState* stp, GenOpArg S, GenOpArg Fail,
 	op->arity += 2;
 	op->a[2].val += 2;
     }
+    ASSERT(op1->a[2].val > 0);
+    ASSERT(op2->a[2].val > 0);
 
     /*
-     * None of the instructions should have zero elements in the list.
+     * Order the instruction sequence appropriately.
      */
 
-    ASSERT(op1->a[2].val > 0);
-    ASSERT(op2->a[2].val > 0);
+    if (TypeFail.val == Fail.val) {
+	/*
+	 * select_val L1 S ... (small numbers)
+	 * label L1
+	 * is_integer Fail S
+	 * select_val Fail S ... (bignums)
+	 */
+	op1->next = label;
+	label->next = is_integer;
+	is_integer->next = op2;
+    } else {
+	/*
+	 * is_integer TypeFail S
+	 * select_val L1 S ... (small numbers)
+	 * label L1
+	 * select_val Fail S ... (bignums)
+	 */
+	is_integer->next = op1;
+	op1->next = label;
+	label->next = op2;
+	op1 = is_integer;
+    }
+    op2->next = NULL;
 
     return op1;
 }
@@ -3091,6 +3157,29 @@ gen_jump_tab(LoaderState* stp, GenOpArg S, GenOpArg Fail, GenOpArg Size, GenOpAr
     ASSERT(Size.val >= 2 && Size.val % 2 == 0);
 
     /*
+     * If there is only one choice, don't generate a jump table.
+     */
+    if (Size.val == 2) {
+	GenOp* jump;
+
+	NEW_GENOP(stp, op);
+	op->arity = 3;
+	op->op = genop_is_ne_exact_3;
+	op->a[0] = Rest[1];
+	op->a[1] = S;
+	op->a[2] = Rest[0];
+
+	NEW_GENOP(stp, jump);
+	jump->next = NULL;
+	jump->arity = 1;
+	jump->op = genop_jump_1;
+	jump->a[0] = Fail;
+
+	op->next = jump;
+	return op;
+    }
+
+    /*
      * Calculate the minimum and maximum values and size of jump table.
      */
 
@@ -3162,8 +3251,9 @@ genopargcompare(GenOpArg* a, GenOpArg* b)
 }
 
 /*
- * Generate a select_val instruction.  We know that a jump table is not suitable,
- * and that all values are of the same type (integer, atoms, floats; never bignums).
+ * Generate a select_val instruction.  We know that a jump table
+ * is not suitable, and that all values are of the same type
+ * (integer or atoms).
  */
 
 static GenOp*
@@ -3177,12 +3267,7 @@ gen_select_val(LoaderState* stp, GenOpArg S, GenOpArg Fail,
 
     NEW_GENOP(stp, op);
     op->next = NULL;
-    if (Rest[0].type != TAG_q) {
-	op->op = genop_i_select_val_3;
-    } else {
-	ASSERT(is_float(stp->literals[Rest[0].val].term));
-	op->op = genop_i_select_float_3;
-    }
+    op->op = genop_i_select_val_3;
     GENOP_ARITY(op, arity);
     op->a[0] = S;
     op->a[1] = Fail;
@@ -3204,19 +3289,19 @@ gen_select_val(LoaderState* stp, GenOpArg S, GenOpArg Fail,
     }
 #endif
 
-    return op;
-}
-
-/* 
- *  Compare function for qsort().
- */
+    /*
+     * Use a special-cased instruction if there are only two values.
+     */
+    if (size == 2) {
+	op->op = genop_i_select_val2_6;
+	op->arity--;
+	op->a[2] = op->a[3];
+	op->a[3] = op->a[4];
+	op->a[4] = op->a[5];
+	op->a[5] = op->a[6];
+    }
 
-static int
-genbigcompare(GenOpArg* a, GenOpArg* b)
-{
-    int val = (int)(b->bigarity - a->bigarity);
-    
-    return val != 0 ? val : ((int) (a->val - b->val));
+    return op;
 }
 
 /*
@@ -3224,37 +3309,35 @@ genbigcompare(GenOpArg* a, GenOpArg* b)
  */
 
 static GenOp*
-gen_select_big(LoaderState* stp, GenOpArg S, GenOpArg Fail,
+gen_select_literals(LoaderState* stp, GenOpArg S, GenOpArg Fail,
 	       GenOpArg Size, GenOpArg* Rest)
 {
     GenOp* op;
-    int arity = Size.val + 2 + 1;
-    int size = Size.val / 2;
+    GenOp* jump;
+    GenOp** prev_next = &op;
+
     int i;
 
-    NEW_GENOP(stp, op);
-    op->next = NULL;
-    op->op = genop_i_select_big_2;
-    GENOP_ARITY(op, arity);
-    op->a[0] = S;
-    op->a[1] = Fail;
     for (i = 0; i < Size.val; i += 2) {
+	GenOp* op;
 	ASSERT(Rest[i].type == TAG_q);
-	op->a[i+2] = Rest[i];
-	op->a[i+2].bigarity = *big_val(stp->literals[op->a[i+2].val].term);
-	op->a[i+3] = Rest[i+1];
-    }
-    ASSERT(i+2 == arity-1);
-    op->a[arity-1].type = TAG_u;
-    op->a[arity-1].val = 0;
-
-    /*
-     * Sort the values in descending arity order.
-     */
-
-    qsort(op->a+2, size, 2*sizeof(GenOpArg), 
-	  (int (*)(const void *, const void *)) genbigcompare);
 
+	NEW_GENOP(stp, op);
+	op->op = genop_is_ne_exact_3;
+	op->arity = 3;
+	op->a[0] = Rest[i+1];
+	op->a[1] = S;
+	op->a[2] = Rest[i];
+	*prev_next = op;
+	prev_next = &op->next;
+    }
+
+    NEW_GENOP(stp, jump);
+    jump->next = NULL;
+    jump->op = genop_jump_1;
+    jump->arity = 1;
+    jump->a[0] = Fail;
+    *prev_next = jump;
     return op;
 }
 
@@ -3272,7 +3355,6 @@ const_select_val(LoaderState* stp, GenOpArg S, GenOpArg Fail,
     int i;
 
     ASSERT(Size.type == TAG_u);
-    ASSERT(S.type == TAG_q);
 
     NEW_GENOP(stp, op);
     op->next = NULL;
@@ -3283,18 +3365,32 @@ const_select_val(LoaderState* stp, GenOpArg S, GenOpArg Fail,
      * Search for a literal matching the controlling expression.
      */
 
-    if (S.type == TAG_q) {
-	Eterm expr = stp->literals[S.val].term;
-	for (i = 0; i < Size.val; i += 2) {
-	    if (Rest[i].type == TAG_q) {
-		Eterm term = stp->literals[Rest[i].val].term;
-		if (eq(term, expr)) {
-		    ASSERT(Rest[i+1].type == TAG_f);
-		    op->a[0] = Rest[i+1];
-		    return op;
+    switch (S.type) {
+    case TAG_q:
+	{
+	    Eterm expr = stp->literals[S.val].term;
+	    for (i = 0; i < Size.val; i += 2) {
+		if (Rest[i].type == TAG_q) {
+		    Eterm term = stp->literals[Rest[i].val].term;
+		    if (eq(term, expr)) {
+			ASSERT(Rest[i+1].type == TAG_f);
+			op->a[0] = Rest[i+1];
+			return op;
+		    }
 		}
 	    }
 	}
+	break;
+    case TAG_i:
+    case TAG_a:
+	for (i = 0; i < Size.val; i += 2) {
+	    if (Rest[i].val == S.val && Rest[i].type == S.type) {
+		ASSERT(Rest[i+1].type == TAG_f);
+		op->a[0] = Rest[i+1];
+		return op;
+	    }
+	}
+	break;
     }
 
     /*
@@ -3477,6 +3573,56 @@ gen_guard_bif3(LoaderState* stp, GenOpArg Fail, GenOpArg Live, GenOpArg Bif,
     return op;
 }
 
+static GenOp*
+tuple_append_put5(LoaderState* stp, GenOpArg Arity, GenOpArg Dst,
+		  GenOpArg* Puts, GenOpArg S1, GenOpArg S2, GenOpArg S3,
+		  GenOpArg S4, GenOpArg S5)
+{
+    GenOp* op;
+    int arity = Arity.val;	/* Arity of tuple, not the instruction */
+    int i;
+
+    NEW_GENOP(stp, op);
+    op->next = NULL;
+    GENOP_ARITY(op, arity+2+5);
+    op->op = genop_i_put_tuple_2;
+    op->a[0] = Dst;
+    op->a[1].type = TAG_u;
+    op->a[1].val = arity + 5;
+    for (i = 0; i < arity; i++) {
+	op->a[i+2] = Puts[i];
+    }
+    op->a[arity+2] = S1;
+    op->a[arity+3] = S2;
+    op->a[arity+4] = S3;
+    op->a[arity+5] = S4;
+    op->a[arity+6] = S5;
+    return op;
+}
+
+static GenOp*
+tuple_append_put(LoaderState* stp, GenOpArg Arity, GenOpArg Dst,
+		 GenOpArg* Puts, GenOpArg S)
+{
+    GenOp* op;
+    int arity = Arity.val;	/* Arity of tuple, not the instruction */
+    int i;
+
+    NEW_GENOP(stp, op);
+    op->next = NULL;
+    GENOP_ARITY(op, arity+2+1);
+    op->op = genop_i_put_tuple_2;
+    op->a[0] = Dst;
+    op->a[1].type = TAG_u;
+    op->a[1].val = arity + 1;
+    for (i = 0; i < arity; i++) {
+	op->a[i+2] = Puts[i];
+    }
+    op->a[arity+2] = S;
+    return op;
+}
+
+
 
 /*
  * Freeze the code in memory, move the string table into place,
@@ -3624,25 +3770,32 @@ freeze_code(LoaderState* stp)
     CHKBLK(ERTS_ALC_T_CODE,code);
     if (compile_size) {
 	byte* compile_info = str_table + strtab_size + attr_size;
-    CHKBLK(ERTS_ALC_T_CODE,code);
+	CHKBLK(ERTS_ALC_T_CODE,code);
 	sys_memcpy(compile_info, stp->chunks[COMPILE_CHUNK].start,
 	       stp->chunks[COMPILE_CHUNK].size);
-    CHKBLK(ERTS_ALC_T_CODE,code);
+
+	CHKBLK(ERTS_ALC_T_CODE,code);
 	code[MI_COMPILE_PTR] = (BeamInstr) compile_info;
-    CHKBLK(ERTS_ALC_T_CODE,code);
+	CHKBLK(ERTS_ALC_T_CODE,code);
 	code[MI_COMPILE_SIZE] = (BeamInstr) stp->chunks[COMPILE_CHUNK].size;
-    CHKBLK(ERTS_ALC_T_CODE,code);
+	CHKBLK(ERTS_ALC_T_CODE,code);
 	decoded_size = erts_decode_ext_size(compile_info, compile_size, 0);
-    CHKBLK(ERTS_ALC_T_CODE,code);
+	CHKBLK(ERTS_ALC_T_CODE,code);
 	if (decoded_size < 0) {
  	    LoadError0(stp, "bad external term representation of compilation information");
  	}
-    CHKBLK(ERTS_ALC_T_CODE,code);
+	CHKBLK(ERTS_ALC_T_CODE,code);
 	code[MI_COMPILE_SIZE_ON_HEAP] = decoded_size;
     }
     CHKBLK(ERTS_ALC_T_CODE,code);
 
     /*
+     * Make sure that we have not overflowed the allocated code space.
+     */
+    ASSERT(str_table + strtab_size + attr_size + compile_size ==
+	   ((byte *) code) + size);
+
+    /*
      * Go through all i_new_bs_put_strings instructions, restore the pointer to
      * the instruction and convert string offsets to pointers (to the
      * FIRST character).
@@ -3876,11 +4029,23 @@ transform_engine(LoaderState* st)
 	    if (i == 0)
 		goto restart;
 	    break;
+#if defined(TOP_is_eq)
 	case TOP_is_eq:
 	    ASSERT(ap < instr->arity);
 	    if (*pc++ != instr->a[ap].val)
 		goto restart;
 	    break;
+#endif
+	case TOP_is_type_eq:
+	    mask = *pc++;
+
+	    ASSERT(ap < instr->arity);
+	    ASSERT(instr->a[ap].type < BEAM_NUM_TAGS);
+	    if (((1 << instr->a[ap].type) & mask) == 0)
+		goto restart;
+	    if (*pc++ != instr->a[ap].val)
+		goto restart;
+	    break;
 	case TOP_is_same_var:
 	    ASSERT(ap < instr->arity);
 	    i = *pc++;
@@ -4001,14 +4166,17 @@ transform_engine(LoaderState* st)
 	case TOP_rest_args:
 	    {
 		int n = *pc++;
+		int formal_arity = gen_opc[instr->op].arity;
+		int num_vars = n + (instr->arity - formal_arity);
+		int j = formal_arity;
+
 		var = erts_alloc(ERTS_ALC_T_LOADER_TMP,
-				 instr->arity * sizeof(GenOpArg));
+				 num_vars * sizeof(GenOpArg));
 		for (i = 0; i < n; i++) {
 		    var[i] = def_vars[i];
 		}
-		while (i < instr->arity) {
-		    var[i] = instr->a[i];
-		    i++;
+		while (i < num_vars) {
+		    var[i++] = instr->a[j++];
 		}
 	    }
 	    break;
@@ -5315,6 +5483,9 @@ erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info)
 	if (state.lambdas != state.def_lambdas) {
 	    erts_free(ERTS_ALC_T_LOADER_TMP, (void *) state.lambdas);
 	}
+	erts_free(ERTS_ALC_T_LOADER_TMP, (void *) state.labels);
+	erts_free(ERTS_ALC_T_LOADER_TMP, (void *) state.atom);
+	erts_free(ERTS_ALC_T_LOADER_TMP, (void *) state.export);
 	if (bin != NULL) {
 	    driver_free_binary(bin);
 	}
@@ -5326,9 +5497,18 @@ erts_make_stub_module(Process* p, Eterm Mod, Eterm Beam, Eterm Info)
     if (code != NULL) {
 	erts_free(ERTS_ALC_T_CODE, code);
     }
+    if (state.labels != NULL) {
+	erts_free(ERTS_ALC_T_LOADER_TMP, (void *) state.labels);
+    }
     if (state.lambdas != state.def_lambdas) {
 	erts_free(ERTS_ALC_T_LOADER_TMP, (void *) state.lambdas);
     }
+    if (state.atom != NULL) {
+	erts_free(ERTS_ALC_T_LOADER_TMP, (void *) state.atom);
+    }
+    if (state.export != NULL) {
+	erts_free(ERTS_ALC_T_LOADER_TMP, (void *) state.export);
+    }
     if (bin != NULL) {
 	driver_free_binary(bin);
     }
diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c
index d4a43f6e5f..bb237e378a 100644
--- a/erts/emulator/beam/bif.c
+++ b/erts/emulator/beam/bif.c
@@ -1351,9 +1351,10 @@ BIF_RETTYPE exit_2(BIF_ALIST_2)
 #ifdef ERTS_SMP
 	 if (rp == BIF_P)
 	     rp_locks &= ~ERTS_PROC_LOCK_MAIN;
-	 else
+	 if (rp_locks)
+	     erts_smp_proc_unlock(rp, rp_locks);
+	 if (rp != BIF_P)
 	     erts_smp_proc_dec_refc(rp);
-	 erts_smp_proc_unlock(rp, rp_locks);
 #endif
 	 /*
 	  * We may have exited ourselves and may have to take action.
diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab
index 60b4b1946b..d9dd80fa8b 100644
--- a/erts/emulator/beam/bif.tab
+++ b/erts/emulator/beam/bif.tab
@@ -660,6 +660,7 @@ bif erts_debug:display/1
 bif 'erl.system.debug':display/1 ebif_erts_debug_display_1
 bif erts_debug:dist_ext_to_term/2
 bif 'erl.system.debug':dist_ext_to_term/2 ebif_erts_debug_dist_ext_to_term_2
+bif erts_debug:instructions/0
 
 #
 # Monitor testing bif's...
diff --git a/erts/emulator/beam/big.c b/erts/emulator/beam/big.c
index ff15d834ab..f47f5a9c0c 100644
--- a/erts/emulator/beam/big.c
+++ b/erts/emulator/beam/big.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -1558,7 +1558,7 @@ Eterm erts_sint64_to_big(Sint64 x, Eterm **hpp)
 ** Convert a bignum to a double float
 */
 int
-big_to_double(Eterm x, double* resp)
+big_to_double(Wterm x, double* resp)
 {
     double d = 0.0;
     Eterm* xp = big_val(x);
@@ -1725,7 +1725,7 @@ static Eterm big_norm(Eterm *x, dsize_t xl, short sign)
 /*
 ** Compare bignums
 */
-int big_comp(Eterm x, Eterm y)
+int big_comp(Wterm x, Wterm y)
 {
     Eterm* xp = big_val(x);
     Eterm* yp = big_val(y);
@@ -2060,7 +2060,7 @@ static Eterm B_plus_minus(ErtsDigit *x, dsize_t xl, short xsgn,
 /*
 ** Add bignums
 */
-Eterm big_plus(Eterm x, Eterm y, Eterm *r)
+Eterm big_plus(Wterm x, Wterm y, Eterm *r)
 {
     Eterm* xp = big_val(x);
     Eterm* yp = big_val(y);
diff --git a/erts/emulator/beam/big.h b/erts/emulator/beam/big.h
index 25466cd3c2..f28a390aea 100644
--- a/erts/emulator/beam/big.h
+++ b/erts/emulator/beam/big.h
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -120,7 +120,7 @@ char *erts_big_to_string(Eterm x, char *buf, Uint buf_sz);
 
 Eterm small_times(Sint, Sint, Eterm*);
 
-Eterm big_plus(Eterm, Eterm, Eterm*);
+Eterm big_plus(Wterm, Wterm, Eterm*);
 Eterm big_minus(Eterm, Eterm, Eterm*);
 Eterm big_times(Eterm, Eterm, Eterm*);
 Eterm big_div(Eterm, Eterm, Eterm*);
@@ -137,9 +137,9 @@ Eterm big_bxor(Eterm, Eterm, Eterm*);
 Eterm big_bnot(Eterm, Eterm*);
 
 Eterm big_lshift(Eterm, Sint, Eterm*);
-int big_comp (Eterm, Eterm);
+int big_comp (Wterm, Wterm);
 int big_ucomp (Eterm, Eterm);
-int big_to_double(Eterm x, double* resp);
+int big_to_double(Wterm x, double* resp);
 Eterm small_to_big(Sint, Eterm*);
 Eterm uint_to_big(Uint, Eterm*);
 Eterm uword_to_big(UWord, Eterm*);
diff --git a/erts/emulator/beam/break.c b/erts/emulator/beam/break.c
index fd2ec91e65..d255cf3558 100644
--- a/erts/emulator/beam/break.c
+++ b/erts/emulator/beam/break.c
@@ -558,7 +558,7 @@ do_break(void)
 #endif
 #ifdef DEBUG
 	case 't':
-	    p_slpq();
+	    erts_p_slpq();
 	    return;
 	case 'b':
 	    bin_check();
diff --git a/erts/emulator/beam/copy.c b/erts/emulator/beam/copy.c
index 8bee47232e..243e8973cf 100644
--- a/erts/emulator/beam/copy.c
+++ b/erts/emulator/beam/copy.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -72,8 +72,11 @@ copy_object(Eterm obj, Process* to)
  * Return the "flat" size of the object.
  */
 
-Uint
-size_object(Eterm obj)
+#if HALFWORD_HEAP
+Uint size_object_rel(Eterm obj, Eterm* base)
+#else
+Uint size_object(Eterm obj)
+#endif
 {
     Uint sum = 0;
     Eterm* ptr;
@@ -84,7 +87,7 @@ size_object(Eterm obj)
 	switch (primary_tag(obj)) {
 	case TAG_PRIMARY_LIST:
 	    sum += 2;
-	    ptr = list_val(obj);
+	    ptr = list_val_rel(obj,base);
 	    obj = *ptr++;
 	    if (!IS_CONST(obj)) {
 		ESTACK_PUSH(s, obj);
@@ -93,11 +96,11 @@ size_object(Eterm obj)
 	    break;
 	case TAG_PRIMARY_BOXED:
 	    {
-		Eterm hdr = *boxed_val(obj);
+		Eterm hdr = *boxed_val_rel(obj,base);
 		ASSERT(is_header(hdr));
 		switch (hdr & _TAG_HEADER_MASK) {
 		case ARITYVAL_SUBTAG:
-		    ptr = tuple_val(obj);
+		    ptr = tuple_val_rel(obj,base);
 		    arity = header_arity(hdr);
 		    sum += arity + 1;
 		    if (arity == 0) { /* Empty tuple -- unusual. */
@@ -113,7 +116,7 @@ size_object(Eterm obj)
 		    break;
 		case FUN_SUBTAG:
 		    {
-			Eterm* bptr = fun_val(obj);
+			Eterm* bptr = fun_val_rel(obj,base);
 			ErlFunThing* funp = (ErlFunThing *) bptr;
 			unsigned eterms = 1 /* creator */ + funp->num_free;
 			unsigned sz = thing_arityval(hdr);
@@ -136,7 +139,7 @@ size_object(Eterm obj)
 			Uint bitoffs;
 			Uint extra_bytes;
 			Eterm hdr;
-			ERTS_GET_REAL_BIN(obj, real_bin, offset, bitoffs, bitsize);
+			ERTS_GET_REAL_BIN_REL(obj, real_bin, offset, bitoffs, bitsize, base);
 			if ((bitsize + bitoffs) > 8) {
 			    sum += ERL_SUB_BIN_SIZE;
 			    extra_bytes = 2;
@@ -146,11 +149,11 @@ size_object(Eterm obj)
 			} else {
 			    extra_bytes = 0;
 			}
-			hdr = *binary_val(real_bin);
+			hdr = *binary_val_rel(real_bin,base);
 			if (thing_subtag(hdr) == REFC_BINARY_SUBTAG) {
 			    sum += PROC_BIN_SIZE;
 			} else {
-			    sum += heap_bin_size(binary_size(obj)+extra_bytes);
+			    sum += heap_bin_size(binary_size_rel(obj,base)+extra_bytes);
 			}
 			goto pop_next;
 		    }
@@ -181,8 +184,12 @@ size_object(Eterm obj)
 /*
  *  Copy a structure to a heap.
  */
-Eterm
-copy_struct(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
+#if HALFWORD_HEAP
+Eterm copy_struct_rel(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap,
+                      Eterm* src_base, Eterm* dst_base)
+#else
+Eterm copy_struct(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
+#endif
 {
     char* hstart;
     Uint hsize;
@@ -214,7 +221,10 @@ copy_struct(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
 
     /* Copy the object onto the heap */
     switch (primary_tag(obj)) {
-    case TAG_PRIMARY_LIST: argp = &res; goto L_copy_list;
+    case TAG_PRIMARY_LIST:
+	argp = &res;
+	objp = list_val_rel(obj,src_base);
+	goto L_copy_list;
     case TAG_PRIMARY_BOXED: argp = &res; goto L_copy_boxed;
     default:
 	erl_exit(ERTS_ABORT_EXIT,
@@ -231,32 +241,46 @@ copy_struct(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
 	    hp++;
 	    break;
 	case TAG_PRIMARY_LIST:
-	    objp = list_val(obj);
+	    objp = list_val_rel(obj,src_base);
+	#if !HALFWORD_HEAP || defined(DEBUG)
 	    if (in_area(objp,hstart,hsize)) {
+		ASSERT(!HALFWORD_HEAP);
 		hp++;
 		break;
 	    }
+	#endif
 	    argp = hp++;
 	    /* Fall through */
 
 	L_copy_list:
 	    tailp = argp;
-	    while (is_list(obj)) {
-		objp = list_val(obj);
+	    for (;;) {
 		tp = tailp;
-		elem = *objp;
+		elem = CAR(objp);
 		if (IS_CONST(elem)) {
-		    *(hbot-2) = elem;
-		    tailp = hbot-1;
 		    hbot -= 2;
+		    CAR(hbot) = elem;
+		    tailp = &CDR(hbot);
 		}
 		else {
-		    *htop = elem;
-		    tailp = htop+1;
+		    CAR(htop) = elem;
+		#if HALFWORD_HEAP
+		    CDR(htop) = CDR(objp);
+		    *tailp = make_list_rel(htop,dst_base);
+		    htop += 2;
+		    goto L_copy;
+		#else
+		    tailp = &CDR(htop);
 		    htop += 2;
+		#endif
+		}
+		ASSERT(!HALFWORD_HEAP || tp < hp || tp >= hbot);
+		*tp = make_list_rel(tailp - 1, dst_base);
+		obj = CDR(objp);
+		if (!is_list(obj)) {
+		    break;
 		}
-		*tp = make_list(tailp - 1);
-		obj = *(objp+1);
+		objp = list_val_rel(obj,src_base);
 	    }
 	    switch (primary_tag(obj)) {
 	    case TAG_PRIMARY_IMMED1: *tailp = obj; goto L_copy;
@@ -268,21 +292,24 @@ copy_struct(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
 	    }
 	    
 	case TAG_PRIMARY_BOXED:
-	    if (in_area(boxed_val(obj),hstart,hsize)) {
+	#if !HALFWORD_HEAP || defined(DEBUG)
+	    if (in_area(boxed_val_rel(obj,src_base),hstart,hsize)) {
+		ASSERT(!HALFWORD_HEAP);
 		hp++;
 		break;
 	    }
+	#endif
 	    argp = hp++;
 
 	L_copy_boxed:
-	    objp = boxed_val(obj);
+	    objp = boxed_val_rel(obj, src_base);
 	    hdr = *objp;
 	    switch (hdr & _TAG_HEADER_MASK) {
 	    case ARITYVAL_SUBTAG:
 		{
 		    int const_flag = 1; /* assume constant tuple */
 		    i = arityval(hdr);
-		    *argp = make_tuple(htop);
+		    *argp = make_tuple_rel(htop, dst_base);
 		    tp = htop;	/* tp is pointer to new arity value */
 		    *htop++ = *objp++; /* copy arity value */
 		    while (i--) {
@@ -311,7 +338,7 @@ copy_struct(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
 		    while (i--)  {
 			*tp++ = *objp++;
 		    }
-		    *argp = make_binary(hbot);
+		    *argp = make_binary_rel(hbot, dst_base);
 		    pb = (ProcBin*) hbot;
 		    erts_refc_inc(&pb->val->refc, 2);
 		    pb->next = off_heap->first;
@@ -338,7 +365,7 @@ copy_struct(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
 			extra_bytes = 0;
 		    } 
 		    real_size = size+extra_bytes;
-		    objp = binary_val(real_bin);
+		    objp = binary_val_rel(real_bin,src_base);
 		    if (thing_subtag(*objp) == HEAP_BINARY_SUBTAG) {
 			ErlHeapBin* from = (ErlHeapBin *) objp;
 			ErlHeapBin* to;
@@ -368,7 +395,7 @@ copy_struct(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
 			off_heap->first = (struct erl_off_heap_header*) to;
 			OH_OVERHEAD(off_heap, to->size / sizeof(Eterm));
 		    }
-		    *argp = make_binary(hbot);
+		    *argp = make_binary_rel(hbot, dst_base);
 		    if (extra_bytes != 0) {
 			ErlSubBin* res;
 			hbot -= ERL_SUB_BIN_SIZE;
@@ -380,7 +407,7 @@ copy_struct(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
 			res->offs = 0;
 			res->is_writable = 0;
 			res->orig = *argp;
-			*argp = make_binary(hbot);
+			*argp = make_binary_rel(hbot, dst_base);
 		    }
 		    break;
 		}
@@ -400,7 +427,7 @@ copy_struct(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
 		    off_heap->first = (struct erl_off_heap_header*) funp;
 		    erts_refc_inc(&funp->fe->refc, 2);
 #endif
-		    *argp = make_fun(tp);
+		    *argp = make_fun_rel(tp, dst_base);
 		}
 		break;
 	    case EXTERNAL_PID_SUBTAG:
@@ -420,7 +447,7 @@ copy_struct(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
 		  off_heap->first = (struct erl_off_heap_header*)etp;
 		  erts_refc_inc(&etp->node->refc, 2);
 
-		  *argp = make_external(tp);
+		  *argp = make_external_rel(tp, dst_base);
 		}
 		break;
 	    case BIN_MATCHSTATE_SUBTAG:
@@ -430,7 +457,7 @@ copy_struct(Eterm obj, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
 		i = thing_arityval(hdr)+1;
 		hbot -= i;
 		tp = hbot;
-		*argp = make_boxed(hbot);
+		*argp = make_boxed_rel(hbot, dst_base);
 		while (i--) {
 		    *tp++ = *objp++;
 		}
@@ -885,12 +912,21 @@ Eterm copy_struct_lazy(Process *from, Eterm orig, Uint offs)
  *
  * NOTE: Assumes that term is a tuple (ptr is an untagged tuple ptr).
  */
-Eterm
-copy_shallow(Eterm* ptr, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
+#if HALFWORD_HEAP
+Eterm copy_shallow_rel(Eterm* ptr, Uint sz, Eterm** hpp, ErlOffHeap* off_heap,
+		       Eterm* src_base)
+#else
+Eterm copy_shallow(Eterm* ptr, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
+#endif
 {
     Eterm* tp = ptr;
     Eterm* hp = *hpp;
-    Sint offs = hp - tp;
+    const Eterm res = make_tuple(hp);
+#if HALFWORD_HEAP
+    const Sint offs = COMPRESS_POINTER(hp - (tp - src_base));
+#else
+    const Sint offs = (hp - tp) * sizeof(Eterm);
+#endif
 
     while (sz--) {
 	Eterm val = *tp++;
@@ -901,7 +937,7 @@ copy_shallow(Eterm* ptr, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
 	    break;
 	case TAG_PRIMARY_LIST:
 	case TAG_PRIMARY_BOXED:
-	    *hp++ = offset_ptr(val, offs);
+	    *hp++ = byte_offset_ptr(val, offs);
 	    break;
 	case TAG_PRIMARY_HEADER:
 	    *hp++ = val;
@@ -958,7 +994,8 @@ copy_shallow(Eterm* ptr, Uint sz, Eterm** hpp, ErlOffHeap* off_heap)
 	}
     }
     *hpp = hp;
-    return make_tuple(ptr + offs); 
+
+    return res;
 }
 
 /* Move all terms in heap fragments into heap. The terms must be guaranteed to 
diff --git a/erts/emulator/beam/dist.c b/erts/emulator/beam/dist.c
index 694460d702..02910fad90 100644
--- a/erts/emulator/beam/dist.c
+++ b/erts/emulator/beam/dist.c
@@ -917,6 +917,7 @@ int erts_net_message(Port *prt,
     Eterm token_size;
     ErtsMonitor *mon;
     ErtsLink *lnk;
+    Uint tuple_arity;
     int res;
 #ifdef ERTS_DIST_MSG_DBG
     int orig_len = len;
@@ -1003,29 +1004,23 @@ int erts_net_message(Port *prt,
 #endif
 
     if (is_not_tuple(arg) || 
-	(tuple = tuple_val(arg), arityval(*tuple) < 1) ||
+	(tuple = tuple_val(arg), (tuple_arity = arityval(*tuple)) < 1) ||
 	is_not_small(tuple[1])) {
-	erts_dsprintf_buf_t *dsbufp = erts_create_logger_dsbuf();
-	erts_dsprintf(dsbufp, "Invalid distribution message: %.200T", arg);
-	erts_send_error_to_logger_nogl(dsbufp);
-	goto data_error;
+ 	goto invalid_message;
     }
 
     token_size = 0;
 
     switch (type = unsigned_val(tuple[1])) {
     case DOP_LINK:
+	if (tuple_arity != 3) {
+	    goto invalid_message;
+	}
 	from = tuple[2];
 	to   = tuple[3];  /* local proc to link to */
 
 	if (is_not_pid(from) || is_not_pid(to)) {
-	    erts_dsprintf_buf_t *dsbufp = erts_create_logger_dsbuf();
-	    PURIFY_MSG("data error");
-	    erts_dsprintf(dsbufp,
-			  "Invalid DOP_LINK distribution message: %.200T",
-			  arg);
-	    erts_send_error_to_logger_nogl(dsbufp);
-	    goto data_error;
+	    goto invalid_message;
 	}
 
 	rp = erts_pid2proc_opt(NULL, 0,
@@ -1064,8 +1059,14 @@ int erts_net_message(Port *prt,
 
     case DOP_UNLINK: {
 	ErtsDistLinkData dld;
+	if (tuple_arity != 3) {
+	    goto invalid_message;
+	}
 	from = tuple[2];
 	to = tuple[3];
+	if (is_not_pid(from) || is_not_pid(to)) {
+	    goto invalid_message;
+	}
 	
 	rp = erts_pid2proc_opt(NULL, 0,
 			       to, ERTS_PROC_LOCK_LINK,
@@ -1092,11 +1093,19 @@ int erts_net_message(Port *prt,
 	/* A remote process wants to monitor us, we get:
 	   {DOP_MONITOR_P, Remote pid, local pid or name, ref} */
 	Eterm name;
+	
+	if (tuple_arity != 4) {
+	    goto invalid_message;
+	}
 
 	watcher = tuple[2];
 	watched = tuple[3];  /* local proc to monitor */
 	ref     = tuple[4];
 
+	if (is_not_ref(ref)) {
+	    goto invalid_message;
+	}
+
 	if (is_atom(watched)) {
 	    name = watched;
 	    rp = erts_whereis_process(NULL, 0,
@@ -1138,10 +1147,17 @@ int erts_net_message(Port *prt,
 	   We get {DOP_DEMONITOR_P, Remote pid, Local pid or name, ref},
 	   We need only the ref of course */
 
+	if (tuple_arity != 4) {
+	    goto invalid_message;
+	}
 	/* watcher = tuple[2]; */
 	/* watched = tuple[3]; May be an atom in case of monitor name */
 	ref = tuple[4];
 
+	if(is_not_ref(ref)) {
+	    goto invalid_message;
+	}
+
 	erts_smp_de_links_lock(dep);
 	mon = erts_remove_monitor(&(dep->monitors),ref);
 	erts_smp_de_links_unlock(dep);
@@ -1166,10 +1182,11 @@ int erts_net_message(Port *prt,
 	erts_destroy_monitor(mon);
 	break;
 
-    case DOP_NODE_LINK: /* XXX never sent ?? */
-	break;
-
     case DOP_REG_SEND_TT:
+	if (tuple_arity != 5) {
+	    goto invalid_message;
+	}
+
 	token_size = size_object(tuple[5]);
 	/* Fall through ... */
     case DOP_REG_SEND:
@@ -1180,12 +1197,19 @@ int erts_net_message(Port *prt,
 	 * There is intentionally no testing of the cookie (it is always '')
 	 * from R9B and onwards.
 	 */
+	if (type != DOP_REG_SEND_TT && tuple_arity != 4) {
+	    goto invalid_message;
+	}
+
 #ifdef ERTS_DIST_MSG_DBG
 	dist_msg_dbg(&ede, "MSG", buf, orig_len);
 #endif
 
 	from = tuple[2];
 	to = tuple[4];
+	if (is_not_pid(from) || is_not_atom(to)){
+	    goto invalid_message;
+	}
 	rp = erts_whereis_process(NULL, 0, to, 0, ERTS_P2P_FLG_SMP_INC_REFC);
 	if (rp) {
 	    Uint xsize = (type == DOP_REG_SEND
@@ -1217,6 +1241,10 @@ int erts_net_message(Port *prt,
 	break;
 
     case DOP_SEND_TT:
+	if (tuple_arity != 4) {
+	    goto invalid_message;
+	}
+	
 	token_size = size_object(tuple[4]);
 	/* Fall through ... */
     case DOP_SEND:
@@ -1227,8 +1255,13 @@ int erts_net_message(Port *prt,
 #ifdef ERTS_DIST_MSG_DBG
 	dist_msg_dbg(&ede, "MSG", buf, orig_len);
 #endif
-
+	if (type != DOP_SEND_TT && tuple_arity != 3) {
+	    goto invalid_message;
+	}
 	to = tuple[3];
+	if (is_not_pid(to)) {
+	    goto invalid_message;
+	}
 	rp = erts_pid2proc_opt(NULL, 0, to, 0, ERTS_P2P_FLG_SMP_INC_REFC);
 	if (rp) {
 	    Uint xsize = type == DOP_SEND ? 0 : ERTS_HEAP_FRAG_SIZE(token_size);
@@ -1266,11 +1299,19 @@ int erts_net_message(Port *prt,
 	Eterm sysname;
 	ErtsProcLocks rp_locks = ERTS_PROC_LOCKS_MSG_SEND|ERTS_PROC_LOCK_LINK;
 
+	if (tuple_arity != 5) {
+	    goto invalid_message;
+	}
+
 	/* watched = tuple[2]; */  /* remote proc which died */
 	/* watcher = tuple[3]; */
 	ref     = tuple[4];
 	reason  = tuple[5];
 
+	if(is_not_ref(ref)) {
+	    goto invalid_message;
+	}
+
 	erts_smp_de_links_lock(dep);
 	sysname = dep->sysname;
 	mon = erts_remove_monitor(&(dep->monitors), ref);
@@ -1317,24 +1358,25 @@ int erts_net_message(Port *prt,
 	ErtsProcLocks rp_locks = ERTS_PROC_LOCK_LINK|ERTS_PROC_LOCKS_XSIG_SEND;
 	/* 'from', which 'to' is linked to, died */
 	if (type == DOP_EXIT) {
-	   from = tuple[2];
-	   to = tuple[3];
-	   reason = tuple[4];
-	   token = NIL;
+	    if (tuple_arity != 4) {
+		goto invalid_message;
+	    }
+	    
+	    from = tuple[2];
+	    to = tuple[3];
+	    reason = tuple[4];
+	    token = NIL;
 	} else {
-	   from = tuple[2];
-	   to = tuple[3];
-	   token = tuple[4];
-	   reason = tuple[5];
+	    if (tuple_arity != 5) {
+		goto invalid_message;
+	    }
+	    from = tuple[2];
+	    to = tuple[3];
+	    token = tuple[4];
+	    reason = tuple[5];
 	}
-	if (is_not_internal_pid(to)) {
-	    erts_dsprintf_buf_t *dsbufp = erts_create_logger_dsbuf();
-	    PURIFY_MSG("data error");
-	    erts_dsprintf(dsbufp,
-			  "Invalid DOP_EXIT distribution message: %.200T",
-			  arg);
-	    erts_send_error_to_logger_nogl(dsbufp);
-	    goto data_error;
+	if (is_not_pid(from) || is_not_internal_pid(to)) {
+	    goto invalid_message;
 	}
 
 	rp = erts_pid2proc(NULL, 0, to, rp_locks);
@@ -1381,15 +1423,24 @@ int erts_net_message(Port *prt,
 	ErtsProcLocks rp_locks = ERTS_PROC_LOCKS_XSIG_SEND;
 	/* 'from' is send an exit signal to 'to' */
 	if (type == DOP_EXIT2) {
-	   from = tuple[2];
-	   to = tuple[3];
-	   reason = tuple[4];
-	   token = NIL;
+	    if (tuple_arity != 4) {
+		goto invalid_message;
+	    }
+	    from = tuple[2];
+	    to = tuple[3];
+	    reason = tuple[4];
+	    token = NIL;
 	} else {
-	   from = tuple[2];
-	   to = tuple[3];
-	   token = tuple[4];
-	   reason = tuple[5];
+	    if (tuple_arity != 5) {
+		goto invalid_message;
+	    }
+	    from = tuple[2];
+	    to = tuple[3];
+	    token = tuple[4];
+	    reason = tuple[5];
+	}
+	if (is_not_pid(from) || is_not_internal_pid(to)) {
+	    goto invalid_message;
 	}
 	rp = erts_pid2proc_opt(NULL, 0, to, rp_locks,
 			       ERTS_P2P_FLG_SMP_INC_REFC);
@@ -1408,10 +1459,14 @@ int erts_net_message(Port *prt,
 	break;
     }
     case DOP_GROUP_LEADER:
+	if (tuple_arity != 3) {
+	    goto invalid_message;
+	}
 	from = tuple[2];   /* Group leader  */
 	to = tuple[3];     /* new member */
-	if (is_not_pid(from))
-	    break;
+	if (is_not_pid(from) || is_not_pid(to)) {
+	    goto invalid_message;
+	}
 
 	rp = erts_pid2proc(NULL, 0, to, ERTS_PROC_LOCK_MAIN);
 	if (!rp)
@@ -1420,16 +1475,8 @@ int erts_net_message(Port *prt,
 	erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_MAIN);
 	break;
 
-    default: {
-	    erts_dsprintf_buf_t *dsbufp = erts_create_logger_dsbuf();
-	    erts_dsprintf(dsbufp,
-			  "Illegal value in distribution dispatch switch: "
-			  "%.200T",
-			  arg);
-	    erts_send_error_to_logger_nogl(dsbufp);
-	    PURIFY_MSG("data error");
-	    goto data_error;
-	}
+    default: 
+	goto invalid_message;
     }
 
     erts_cleanup_offheap(&off_heap);
@@ -1441,8 +1488,14 @@ int erts_net_message(Port *prt,
     UnUseTmpHeapNoproc(DIST_CTL_DEFAULT_SIZE);
     ERTS_SMP_CHK_NO_PROC_LOCKS;
     return 0;
-
+ invalid_message:
+    {
+	erts_dsprintf_buf_t *dsbufp = erts_create_logger_dsbuf();
+	erts_dsprintf(dsbufp, "Invalid distribution message: %.200T", arg);
+	erts_send_error_to_logger_nogl(dsbufp);
+    }
  data_error:
+    PURIFY_MSG("data error");
     erts_cleanup_offheap(&off_heap);
 #ifndef HYBRID /* FIND ME! */
     if (ctl != ctl_default) {
diff --git a/erts/emulator/beam/dist.h b/erts/emulator/beam/dist.h
index 9ccc3e5ba9..695a4fc3fe 100644
--- a/erts/emulator/beam/dist.h
+++ b/erts/emulator/beam/dist.h
@@ -52,7 +52,7 @@
 #define DOP_SEND		2
 #define DOP_EXIT		3
 #define DOP_UNLINK		4
-#define DOP_NODE_LINK		5
+/* Ancient DOP_NODE_LINK (5) was here, can be reused */
 #define DOP_REG_SEND		6
 #define DOP_GROUP_LEADER	7
 #define DOP_EXIT2		8
@@ -69,7 +69,6 @@
 /* distribution trap functions */
 extern Export* dsend2_trap;
 extern Export* dsend3_trap;
-/*extern Export* dsend_nosuspend_trap;*/
 extern Export* dlink_trap;
 extern Export* dunlink_trap;
 extern Export* dmonitor_node_trap;
diff --git a/erts/emulator/beam/erl_alloc.c b/erts/emulator/beam/erl_alloc.c
index 7793f60f4f..775f4435a9 100644
--- a/erts/emulator/beam/erl_alloc.c
+++ b/erts/emulator/beam/erl_alloc.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2002-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2002-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -1411,6 +1411,33 @@ void erts_alloc_reg_scheduler_id(Uint id)
     erts_tsd_set(thr_ix_key, (void *)(long) ix);
 }
 
+static void
+no_verify(Allctr_t *allctr)
+{
+
+}
+
+erts_alloc_verify_func_t
+erts_alloc_get_verify_unused_temp_alloc(Allctr_t **allctr)
+{
+    if (erts_allctrs_info[ERTS_ALC_A_TEMPORARY].alloc_util
+	&& erts_allctrs_info[ERTS_ALC_A_TEMPORARY].thr_spec) {
+	ErtsAllocatorThrSpec_t *tspec;
+	tspec = &erts_allctr_thr_spec[ERTS_ALC_A_TEMPORARY];
+	if (!tspec->all_thr_safe) {
+	    int ix = erts_alc_get_thr_ix();
+
+	    if (ix < tspec->size) {
+		*allctr = tspec->allctr[ix];
+		return erts_alcu_verify_unused;
+	    }
+	}
+    }
+
+    *allctr = NULL;
+    return no_verify;
+}
+
 __decl_noreturn void
 erts_alc_fatal_error(int error, int func, ErtsAlcType_t n, ...)
 {
@@ -1568,7 +1595,6 @@ erts_memory(int *print_to_p, void *print_to_arg, void *proc, Eterm earg)
     Eterm atoms[sizeof(size)/sizeof(Uint)];
     Uint *uintps[sizeof(size)/sizeof(Uint)];
     Eterm euints[sizeof(size)/sizeof(Uint)];
-    int need_atom;
     int want_tot_or_sys;
     int length;
     Eterm res = THE_NON_VALUE;
@@ -1756,7 +1782,6 @@ erts_memory(int *print_to_p, void *print_to_arg, void *proc, Eterm earg)
     /* Calculate values needed... */
 
     want_tot_or_sys = want.total || want.system;
-    need_atom = ERTS_MEM_NEED_ALL_ALCU || want.atom;
 
     if (ERTS_MEM_NEED_ALL_ALCU) {
 	size.total = 0;
diff --git a/erts/emulator/beam/erl_alloc.h b/erts/emulator/beam/erl_alloc.h
index 3e96c76dbf..17ff9c3b03 100644
--- a/erts/emulator/beam/erl_alloc.h
+++ b/erts/emulator/beam/erl_alloc.h
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2002-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2002-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -236,6 +236,11 @@ void *erts_realloc_fnf(ErtsAlcType_t type, void *ptr, Uint size)
 
 #endif /* #if ERTS_ALC_DO_INLINE || defined(ERTS_ALC_INTERNAL__) */
 
+typedef void (*erts_alloc_verify_func_t)(Allctr_t *);
+
+erts_alloc_verify_func_t
+erts_alloc_get_verify_unused_temp_alloc(Allctr_t **allctr);
+
 #ifndef ERTS_CACHE_LINE_SIZE
 /* Assume a cache line size of 64 bytes */
 #  define ERTS_CACHE_LINE_SIZE ((UWord) 64)
diff --git a/erts/emulator/beam/erl_alloc.types b/erts/emulator/beam/erl_alloc.types
index 408ffd12f7..ca71798917 100644
--- a/erts/emulator/beam/erl_alloc.types
+++ b/erts/emulator/beam/erl_alloc.types
@@ -1,7 +1,7 @@
 #
 # %CopyrightBegin%
 #
-# Copyright Ericsson AB 2003-2010. All Rights Reserved.
+# Copyright Ericsson AB 2003-2011. All Rights Reserved.
 #
 # The contents of this file are subject to the Erlang Public License,
 # Version 1.1, (the "License"); you may not use this file except in
@@ -193,6 +193,7 @@ type	DB_FIXATION	SHORT_LIVED	ETS		db_fixation
 type	DB_FIX_DEL	SHORT_LIVED	ETS		fixed_del
 type	DB_TABLES	LONG_LIVED	ETS		db_tabs
 type    DB_NTAB_ENT	STANDARD	ETS		db_named_table_entry
+type	DB_HEIR_DATA	STANDARD	ETS		db_heir_data
 type	DB_TMP		TEMPORARY	ETS		db_tmp
 type	DB_MC_STK	TEMPORARY	ETS		db_mc_stack
 type	DB_MS_PSDO_PROC	LONG_LIVED	ETS		db_match_pseudo_proc
@@ -263,6 +264,8 @@ type	XPORTS_LIST	SHORT_LIVED	SYSTEM		extra_port_list
 type	PROC_LCK_WTR	LONG_LIVED	SYSTEM		proc_lock_waiter
 type	PROC_LCK_QS	LONG_LIVED	SYSTEM		proc_lock_queues
 type	RUNQ_BLNS	LONG_LIVED	SYSTEM		run_queue_balancing
+type	MISC_AUX_WORK_Q	LONG_LIVED	SYSTEM		misc_aux_work_q
+type	MISC_AUX_WORK	SHORT_LIVED	SYSTEM		misc_aux_work
 +endif
 
 #
diff --git a/erts/emulator/beam/erl_alloc_util.c b/erts/emulator/beam/erl_alloc_util.c
index 8b184899c9..1394b7e829 100644
--- a/erts/emulator/beam/erl_alloc_util.c
+++ b/erts/emulator/beam/erl_alloc_util.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2002-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2002-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -3368,6 +3368,38 @@ erts_alcu_test(unsigned long op, unsigned long a1, unsigned long a2)
  * Debug functions                                                           *
 \*                                                                           */
 
+void
+erts_alcu_verify_unused(Allctr_t *allctr)
+{
+    UWord no;
+
+    no = allctr->sbcs.curr_mseg.no;
+    no += allctr->sbcs.curr_sys_alloc.no;
+    no += allctr->mbcs.blocks.curr.no;
+
+    if (no) {
+	UWord sz = allctr->sbcs.blocks.curr.size;
+	sz += allctr->mbcs.blocks.curr.size;
+	erl_exit(ERTS_ABORT_EXIT,
+		 "%salloc() used when expected to be unused!\n"
+		 "Total amount of blocks allocated: %bpu\n"
+		 "Total amount of bytes allocated: %bpu\n",
+		 allctr->name_prefix, no, sz);
+    }
+}
+
+void
+erts_alcu_verify_unused_ts(Allctr_t *allctr)
+{
+#ifdef USE_THREADS
+    erts_mtx_lock(&allctr->mutex);
+#endif
+    erts_alcu_verify_unused(allctr);
+#ifdef USE_THREADS
+    erts_mtx_unlock(&allctr->mutex);
+#endif
+}
+
 #ifdef ERTS_ALLOC_UTIL_HARD_DEBUG
 
 static void
diff --git a/erts/emulator/beam/erl_alloc_util.h b/erts/emulator/beam/erl_alloc_util.h
index f2b951bca6..d296081714 100644
--- a/erts/emulator/beam/erl_alloc_util.h
+++ b/erts/emulator/beam/erl_alloc_util.h
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2002-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2002-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -333,6 +333,9 @@ struct Allctr_t_ {
 int	erts_alcu_start(Allctr_t *, AllctrInit_t *);
 void	erts_alcu_stop(Allctr_t *);
 
+void	erts_alcu_verify_unused(Allctr_t *);
+void	erts_alcu_verify_unused_ts(Allctr_t *allctr);
+
 unsigned long	erts_alcu_test(unsigned long, unsigned long, unsigned long);
 
 
diff --git a/erts/emulator/beam/erl_bif_lists.c b/erts/emulator/beam/erl_bif_lists.c
index ce13469801..47c48e74d6 100644
--- a/erts/emulator/beam/erl_bif_lists.c
+++ b/erts/emulator/beam/erl_bif_lists.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1999-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1999-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -378,7 +378,7 @@ keyfind(int Bif, Process* p, Eterm Key, Eterm Pos, Eterm List)
 		Eterm *tuple_ptr = tuple_val(term);
 		if (pos <= arityval(*tuple_ptr)) {
 		    Eterm element = tuple_ptr[pos];
-		    if (cmp(Key, element) == 0) {
+		    if (CMP(Key, element) == 0) {
 			return term;
 		    }
 		}
diff --git a/erts/emulator/beam/erl_bif_timer.c b/erts/emulator/beam/erl_bif_timer.c
index 4ae2f6ebf4..db771bd216 100644
--- a/erts/emulator/beam/erl_bif_timer.c
+++ b/erts/emulator/beam/erl_bif_timer.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2005-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2005-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -478,7 +478,7 @@ setup_bif_timer(Uint32 xflags,
     tab_insert(btm);
     ASSERT(btm == tab_find(ref));
     btm->tm.active = 0; /* MUST be initalized */
-    erl_set_timer(&btm->tm,
+    erts_set_timer(&btm->tm,
 		  (ErlTimeoutProc) bif_timer_timeout,
 		  (ErlCancelProc) bif_timer_cleanup,
 		  (void *) btm,
@@ -550,7 +550,7 @@ BIF_RETTYPE cancel_timer_1(BIF_ALIST_1)
 	res = am_false;
     }
     else {
-	Uint left = time_left(&btm->tm);
+	Uint left = erts_time_left(&btm->tm);
 	if (!(btm->flags & BTM_FLG_BYNAME)) {
 	    erts_smp_proc_lock(btm->receiver.proc.ess, ERTS_PROC_LOCK_MSGQ);
 	    unlink_proc(btm);
@@ -558,7 +558,7 @@ BIF_RETTYPE cancel_timer_1(BIF_ALIST_1)
 	}
 	tab_remove(btm);
 	ASSERT(!tab_find(BIF_ARG_1));
-	erl_cancel_timer(&btm->tm);
+	erts_cancel_timer(&btm->tm);
 	erts_smp_btm_rwunlock();
 	res = erts_make_integer(left, BIF_P);
     }
@@ -587,7 +587,7 @@ BIF_RETTYPE read_timer_1(BIF_ALIST_1)
 	res = am_false;
     }
     else {
-	Uint left = time_left(&btm->tm);
+	Uint left = erts_time_left(&btm->tm);
 	res = erts_make_integer(left, BIF_P);
     }
 
@@ -613,7 +613,8 @@ erts_print_bif_timer_info(int to, void *to_arg)
 			      : btm->receiver.proc.ess->id);
 	    erts_print(to, to_arg, "=timer:%T\n", receiver);
 	    erts_print(to, to_arg, "Message: %T\n", btm->message);
-	    erts_print(to, to_arg, "Time left: %d ms\n", time_left(&btm->tm));
+	    erts_print(to, to_arg, "Time left: %u ms\n",
+		       erts_time_left(&btm->tm));
 	}
     }
 
@@ -640,7 +641,7 @@ erts_cancel_bif_timers(Process *p, ErtsProcLocks plocks)
 	tab_remove(btm);
 	tmp_btm = btm;
 	btm = btm->receiver.proc.next;
-	erl_cancel_timer(&tmp_btm->tm);
+	erts_cancel_timer(&tmp_btm->tm);
     }
 
     p->bif_timers = NULL;
diff --git a/erts/emulator/beam/erl_binary.h b/erts/emulator/beam/erl_binary.h
index bdf0fe23fc..506c4813fa 100644
--- a/erts/emulator/beam/erl_binary.h
+++ b/erts/emulator/beam/erl_binary.h
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2000-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2000-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -71,6 +71,7 @@ typedef struct erl_heap_bin {
  */
 
 #define binary_size(Bin) (binary_val(Bin)[1])
+#define binary_size_rel(Bin,BasePtr) (binary_val_rel(Bin,BasePtr)[1])
 
 #define binary_bitsize(Bin)			\
   ((*binary_val(Bin) == HEADER_SUB_BIN) ?	\
@@ -93,9 +94,12 @@ typedef struct erl_heap_bin {
  * Bitsize: output variable (Uint)
  */
 
-#define ERTS_GET_BINARY_BYTES(Bin,Bytep,Bitoffs,Bitsize)		\
+#define ERTS_GET_BINARY_BYTES(Bin,Bytep,Bitoffs,Bitsize) \
+     ERTS_GET_BINARY_BYTES_REL(Bin,Bytep,Bitoffs,Bitsize,NULL)
+
+#define ERTS_GET_BINARY_BYTES_REL(Bin,Bytep,Bitoffs,Bitsize,BasePtr)    \
 do {									\
-    Eterm* _real_bin = binary_val(Bin);					\
+    Eterm* _real_bin = binary_val_rel(Bin,BasePtr);			\
     Uint _offs = 0;							\
     Bitoffs = Bitsize = 0;						\
     if (*_real_bin == HEADER_SUB_BIN) {					\
@@ -103,7 +107,7 @@ do {									\
 	_offs = _sb->offs;						\
         Bitoffs = _sb->bitoffs;						\
         Bitsize = _sb->bitsize;						\
-	_real_bin = binary_val(_sb->orig);				\
+	_real_bin = binary_val_rel(_sb->orig,BasePtr);			\
     }									\
     if (*_real_bin == HEADER_PROC_BIN) {				\
 	Bytep = ((ProcBin *) _real_bin)->bytes + _offs;			\
@@ -125,9 +129,12 @@ do {									\
  * BitSize: Extra bit size (Uint)
  */
 
-#define ERTS_GET_REAL_BIN(Bin, RealBin, ByteOffset, BitOffset, BitSize)	\
+#define ERTS_GET_REAL_BIN(Bin, RealBin, ByteOffset, BitOffset, BitSize) \
+     ERTS_GET_REAL_BIN_REL(Bin, RealBin, ByteOffset, BitOffset, BitSize, NULL)
+
+#define ERTS_GET_REAL_BIN_REL(Bin, RealBin, ByteOffset, BitOffset, BitSize, BasePtr) \
   do {									\
-    ErlSubBin* _sb = (ErlSubBin *) binary_val(Bin);			\
+    ErlSubBin* _sb = (ErlSubBin *) binary_val_rel(Bin,BasePtr);	        \
     if (_sb->thing_word == HEADER_SUB_BIN) {				\
       RealBin = _sb->orig;						\
       ByteOffset = _sb->offs;						\
diff --git a/erts/emulator/beam/erl_bits.c b/erts/emulator/beam/erl_bits.c
index 88d2c06246..6f8a7436d5 100644
--- a/erts/emulator/beam/erl_bits.c
+++ b/erts/emulator/beam/erl_bits.c
@@ -555,10 +555,11 @@ fmt_int(byte *buf, Uint sz, Eterm val, Uint size, Uint flags)
 {
     unsigned long offs;
 
-    ASSERT(size != 0);
     offs = BIT_OFFSET(size);
     if (is_small(val)) {
 	Sint v = signed_val(val);
+
+	ASSERT(size != 0);	  /* Tested by caller */
 	if (flags & BSF_LITTLE) { /* Little endian */
 	    sz--;
 	    COPY_VAL(buf,1,v,sz);
@@ -578,6 +579,9 @@ fmt_int(byte *buf, Uint sz, Eterm val, Uint size, Uint flags)
 	ErtsDigit* dp = big_v(val);
 	int n = MIN(sz,ds);
 
+	if (size == 0) {
+	    return 0;
+	}
 	if (flags & BSF_LITTLE) {
 	    sz -= n;                       /* pad with this amount */
 	    if (sign) {
@@ -729,15 +733,13 @@ erts_new_bs_put_integer(ERL_BITS_PROTO_3(Eterm arg, Uint num_bits, unsigned flag
     Uint b;
     byte *iptr;
 
-    if (num_bits == 0) {
-	return 1;
-    }
-
     bit_offset = BIT_OFFSET(bin_offset);
     if (is_small(arg)) {
 	Uint rbits = 8 - bit_offset;
 
-	if (bit_offset + num_bits <= 8) {
+	if (num_bits == 0) {
+	    return 1;
+	} else if (bit_offset + num_bits <= 8) {
 	    /*
 	     * All bits are in the same byte.
 	     */ 
diff --git a/erts/emulator/beam/erl_cpu_topology.c b/erts/emulator/beam/erl_cpu_topology.c
index 8a6b4d8d6c..bcf8bcf270 100644
--- a/erts/emulator/beam/erl_cpu_topology.c
+++ b/erts/emulator/beam/erl_cpu_topology.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2010. All Rights Reserved.
+ * Copyright Ericsson AB 2010-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -630,13 +630,13 @@ write_schedulers_bind_change(erts_cpu_topology_t *cpudata, int size)
 int
 erts_init_scheduler_bind_type_string(char *how)
 {
-    if (erts_bind_to_cpu(cpuinfo, -1) == -ENOTSUP)
+    if (sys_strcmp(how, "u") == 0)
+	cpu_bind_order = ERTS_CPU_BIND_NONE;
+    else if (erts_bind_to_cpu(cpuinfo, -1) == -ENOTSUP)
 	return ERTS_INIT_SCHED_BIND_TYPE_NOT_SUPPORTED;
-
-    if (!system_cpudata && !user_cpudata)
+    else if (!system_cpudata && !user_cpudata)
 	return ERTS_INIT_SCHED_BIND_TYPE_ERROR_NO_CPU_TOPOLOGY;
-
-    if (sys_strcmp(how, "db") == 0)
+    else if (sys_strcmp(how, "db") == 0)
 	cpu_bind_order = ERTS_CPU_BIND_DEFAULT_BIND;
     else if (sys_strcmp(how, "s") == 0)
 	cpu_bind_order = ERTS_CPU_BIND_SPREAD;
@@ -652,11 +652,8 @@ erts_init_scheduler_bind_type_string(char *how)
 	cpu_bind_order = ERTS_CPU_BIND_NO_NODE_THREAD_SPREAD;
     else if (sys_strcmp(how, "ns") == 0)
 	cpu_bind_order = ERTS_CPU_BIND_NO_SPREAD;
-    else if (sys_strcmp(how, "u") == 0)
-	cpu_bind_order = ERTS_CPU_BIND_NONE;
     else
 	return ERTS_INIT_SCHED_BIND_TYPE_ERROR_NO_BAD_TYPE;
-
     return ERTS_INIT_SCHED_BIND_TYPE_SUCCESS;
 }
 
@@ -724,6 +721,11 @@ erts_bind_schedulers(Process *c_p, Eterm how)
     erts_smp_rwmtx_rwlock(&cpuinfo_rwmtx);
 
     if (erts_bind_to_cpu(cpuinfo, -1) == -ENOTSUP) {
+	if (cpu_bind_order == ERTS_CPU_BIND_NONE
+	    && ERTS_IS_ATOM_STR("unbound", how)) {
+	    res = bound_schedulers_term(ERTS_CPU_BIND_NONE);
+	    goto done;
+	}
 	ERTS_BIF_PREP_ERROR(res, c_p, EXC_NOTSUP);
     }
     else {
diff --git a/erts/emulator/beam/erl_db.c b/erts/emulator/beam/erl_db.c
index 65565cf3c7..5b74240cc3 100644
--- a/erts/emulator/beam/erl_db.c
+++ b/erts/emulator/beam/erl_db.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -219,47 +219,68 @@ Export ets_select_continue_exp;
  * Static traps
  */
 static Export ets_delete_continue_exp;
-
-static ERTS_INLINE DbTable* db_ref(DbTable* tb, db_lock_kind_t kind)
-{
-    if (tb != NULL && kind != LCK_READ) {
-	erts_refc_inc(&tb->common.ref, 2);
-    }
-    return tb;
-}
-
-static ERTS_INLINE DbTable* db_unref(DbTable* tb, db_lock_kind_t kind)
+	
+static void
+free_dbtable(DbTable* tb)
 {
-    if (kind != LCK_READ && !erts_refc_dectest(&tb->common.ref, 0)) {
 #ifdef HARDDEBUG
 	if (erts_smp_atomic_read(&tb->common.memory_size) != sizeof(DbTable)) {
-	    erts_fprintf(stderr, "ets: db_unref memory remain=%ld fix=%x\n",
-			 erts_smp_atomic_read(&tb->common.memory_size)-sizeof(DbTable), 
+	    erts_fprintf(stderr, "ets: free_dbtable memory remain=%ld fix=%x\n",
+			 erts_smp_atomic_read(&tb->common.memory_size)-sizeof(DbTable),
 			 tb->common.fixations);
 	}
-	erts_fprintf(stderr, "ets: db_unref(%T) deleted!!!\r\n", 
+	erts_fprintf(stderr, "ets: free_dbtable(%T) deleted!!!\r\n",
 		     tb->common.id);
 
-	erts_fprintf(stderr, "ets: db_unref: meta_pid_to_tab common.memory_size = %ld\n",
+	erts_fprintf(stderr, "ets: free_dbtable: meta_pid_to_tab common.memory_size = %ld\n",
 		     erts_smp_atomic_read(&meta_pid_to_tab->common.memory_size));
 	print_table(ERTS_PRINT_STDOUT, NULL, 1, meta_pid_to_tab);
 
 
-	erts_fprintf(stderr, "ets: db_unref: meta_pid_to_fixed_tab common.memory_size = %ld\n",
+	erts_fprintf(stderr, "ets: free_dbtable: meta_pid_to_fixed_tab common.memory_size = %ld\n",
 		     erts_smp_atomic_read(&meta_pid_to_fixed_tab->common.memory_size));
 	print_table(ERTS_PRINT_STDOUT, NULL, 1, meta_pid_to_fixed_tab);
-	
 #endif
 #ifdef ERTS_SMP
 	erts_smp_rwmtx_destroy(&tb->common.rwlock);
 	erts_smp_mtx_destroy(&tb->common.fixlock);
 #endif
 	ASSERT(is_immed(tb->common.heir_data));
-	erts_db_free(ERTS_ALC_T_DB_TABLE, tb, (void *) tb, sizeof(DbTable));		     
+	erts_db_free(ERTS_ALC_T_DB_TABLE, tb, (void *) tb, sizeof(DbTable));
 	ERTS_ETS_MISC_MEM_ADD(-sizeof(DbTable));
-	return NULL;
-    }
-    return tb;
+}
+
+#ifdef ERTS_SMP
+static void
+chk_free_dbtable(void *vtb)
+{
+    DbTable * tb = (DbTable *) vtb;
+    ERTS_THR_MEMORY_BARRIER;
+    if (erts_refc_dectest(&tb->common.ref, 0) == 0)
+	free_dbtable(tb);
+}
+#endif
+
+static void schedule_free_dbtable(DbTable* tb)
+{
+    /*
+     * NON-SMP case: Caller is *not* allowed to access the *tb
+     *               structure after this function has returned!          
+     * SMP case:     Caller is allowed to access the *tb structure
+     *               until the bif has returned (we typically
+     *               need to unlock the table lock after this
+     *               function has returned).
+     */
+#ifdef ERTS_SMP
+    int scheds = erts_get_max_no_executing_schedulers();
+    ASSERT(scheds >= 1);
+    ASSERT(erts_refc_read(&tb->common.ref, 0) == 0);
+    erts_refc_init(&tb->common.ref, scheds);
+    ERTS_THR_MEMORY_BARRIER;
+    erts_smp_schedule_misc_aux_work(0, scheds, chk_free_dbtable, tb);
+#else
+    free_dbtable(tb);
+#endif
 }
 
 static ERTS_INLINE void db_init_lock(DbTable* tb, int use_frequent_read_lock,
@@ -270,8 +291,6 @@ static ERTS_INLINE void db_init_lock(DbTable* tb, int use_frequent_read_lock,
     if (use_frequent_read_lock)
 	rwmtx_opt.type = ERTS_SMP_RWMTX_TYPE_FREQUENT_READ;
 #endif
-    erts_refc_init(&tb->common.ref, 1);
-    erts_refc_init(&tb->common.fixref, 0);
 #ifdef ERTS_SMP
     erts_smp_rwmtx_init_opt_x(&tb->common.rwlock, &rwmtx_opt,
 			      rwname, tb->common.the_name);
@@ -280,7 +299,7 @@ static ERTS_INLINE void db_init_lock(DbTable* tb, int use_frequent_read_lock,
 #endif
 }
 
-static ERTS_INLINE void db_lock_take_over_ref(DbTable* tb, db_lock_kind_t kind)
+static ERTS_INLINE void db_lock(DbTable* tb, db_lock_kind_t kind)
 {
 #ifdef ERTS_SMP
     ASSERT(tb != meta_pid_to_tab && tb != meta_pid_to_fixed_tab);
@@ -308,16 +327,13 @@ static ERTS_INLINE void db_lock_take_over_ref(DbTable* tb, db_lock_kind_t kind)
 #endif
 }
 
-static ERTS_INLINE void db_lock(DbTable* tb, db_lock_kind_t kind)
-{
-    (void) db_ref(tb, kind);
-#ifdef ERTS_SMP
-    db_lock_take_over_ref(tb, kind);
-#endif
-}
-
 static ERTS_INLINE void db_unlock(DbTable* tb, db_lock_kind_t kind)
 {
+    /*
+     * In NON-SMP case tb may refer to an already deallocated
+     * DbTable structure. That is, ONLY the SMP case is allowed
+     * to follow the tb pointer!
+     */
 #ifdef ERTS_SMP
     ASSERT(tb != meta_pid_to_tab && tb != meta_pid_to_fixed_tab);
 
@@ -344,7 +360,6 @@ static ERTS_INLINE void db_unlock(DbTable* tb, db_lock_kind_t kind)
 	}
     }
 #endif
-    (void) db_unref(tb, kind); /* May delete table... */
 }
 
 
@@ -371,6 +386,13 @@ DbTable* db_get_table_aux(Process *p,
     DbTable *tb = NULL;
     erts_smp_rwmtx_t *mtl = NULL;
 
+    /*
+     * IMPORTANT: Only scheduler threads are allowed
+     *            to access tables. Memory management
+     *            depend on it.
+     */
+    ASSERT(erts_get_scheduler_data());
+
     if (is_small(id)) {
 	Uint slot = unsigned_val(id) & meta_main_tab_slot_mask;
 	if (!meta_already_locked) {
@@ -384,12 +406,8 @@ DbTable* db_get_table_aux(Process *p,
 			       || erts_lc_rwmtx_is_rwlocked(test_mtl));
 	}
 #endif
-	if (slot < db_max_tabs && IS_SLOT_ALIVE(slot)) {
-	    /* SMP: inc to prevent race, between unlock of meta_main_tab_lock
-	     * and the table locking outside the meta_main_tab_lock
-	     */
-	    tb = db_ref(meta_main_tab[slot].u.tb, kind);
-	}
+	if (slot < db_max_tabs && IS_SLOT_ALIVE(slot))
+	    tb = meta_main_tab[slot].u.tb;
     }
     else if (is_atom(id)) {
 	struct meta_name_tab_entry* bucket = meta_name_tab_bucket(id,&mtl);
@@ -403,16 +421,15 @@ DbTable* db_get_table_aux(Process *p,
 
 	if (bucket->pu.tb != NULL) {
 	    if (is_atom(bucket->u.name_atom)) { /* single */
-		if (bucket->u.name_atom == id) {
-		    tb = db_ref(bucket->pu.tb, kind);
-		}
+		if (bucket->u.name_atom == id)
+		    tb = bucket->pu.tb;
 	    }
 	    else { /* multi */
 		Uint cnt = unsigned_val(bucket->u.mcnt);
 		Uint i;
 		for (i=0; i<cnt; i++) {
 		    if (bucket->pu.mvec[i].u.name_atom == id) {
-			tb = db_ref(bucket->pu.mvec[i].pu.tb, kind);
+			tb = bucket->pu.mvec[i].pu.tb;
 			break;
 		    }
 		}
@@ -420,7 +437,7 @@ DbTable* db_get_table_aux(Process *p,
 	}
     }
     if (tb) {
-	db_lock_take_over_ref(tb, kind);
+	db_lock(tb, kind);
 	if (tb->common.id != id
 	    || ((tb->common.status & what) == 0 && p->id != tb->common.owner)) {
 	    db_unlock(tb, kind);
@@ -594,11 +611,11 @@ done:
 */
 static ERTS_INLINE void local_fix_table(DbTable* tb)
 {
-    erts_refc_inc(&tb->common.fixref, 1);
+    erts_refc_inc(&tb->common.ref, 1);
 }	    
 static ERTS_INLINE void local_unfix_table(DbTable* tb)
 {	
-    if (erts_refc_dectest(&tb->common.fixref, 0) == 0) {
+    if (erts_refc_dectest(&tb->common.ref, 0) == 0) {
 	ASSERT(IS_HASH_TABLE(tb->common.status));
 	db_unfix_table_hash(&(tb->hash));
     }
@@ -893,7 +910,8 @@ BIF_RETTYPE ets_update_counter_3(BIF_ALIST_3)
 	Eterm upop;
 	Eterm* tpl;
 	Sint position;
-	Eterm incr, warp, oldcnt;
+	Eterm incr, warp;
+	Wterm oldcnt;
 
 	if (is_not_list(iter)) {
 	    goto finalize;
@@ -968,7 +986,7 @@ BIF_RETTYPE ets_update_counter_3(BIF_ALIST_3)
 	Eterm* tpl = tuple_val(CAR(list_val(iter)));
 	Sint position = signed_val(tpl[1]);
 	Eterm incr = tpl[2];
-	Eterm oldcnt = handle.dbterm->tpl[position];
+	Wterm oldcnt = db_do_read_element(&handle,position);
 	Eterm newcnt = db_add_counter(&htop, oldcnt, incr);
 
 	if (newcnt == NIL) {
@@ -981,9 +999,9 @@ BIF_RETTYPE ets_update_counter_3(BIF_ALIST_3)
 
 	if (arityval(*tpl) == 4) { /* Maybe warp it */
 	    Eterm threshold = tpl[3];
-	    if ((cmp(incr,make_small(0)) < 0) ? /* negative increment? */
-		(cmp(newcnt,threshold) < 0) :  /* if negative, check if below */
-		(cmp(newcnt,threshold) > 0)) { /* else check if above threshold */
+	    if ((CMP(incr,make_small(0)) < 0) ? /* negative increment? */
+		(CMP(newcnt,threshold) < 0) :  /* if negative, check if below */
+		(CMP(newcnt,threshold) > 0)) { /* else check if above threshold */
 
 		newcnt = tpl[4];
 	    }
@@ -1414,6 +1432,7 @@ BIF_RETTYPE ets_new_2(BIF_ALIST_2)
     tb->common.type = status & ERTS_ETS_TABLE_TYPES;
     /* Note, 'type' is *read only* from now on... */
 #endif
+    erts_refc_init(&tb->common.ref, 0);
     db_init_lock(tb, status & (DB_FINE_LOCKED|DB_FREQ_READ),
 		 "db_tab", "db_tab_fix");
     tb->common.keypos = keypos;
@@ -1436,8 +1455,7 @@ BIF_RETTYPE ets_new_2(BIF_ALIST_2)
 				      "** Too many db tables **\n");
 	free_heir_data(tb);
 	tb->common.meth->db_free_table(tb);
-	erts_db_free(ERTS_ALC_T_DB_TABLE, tb, (void *) tb, sizeof(DbTable));
-	ERTS_ETS_MISC_MEM_ADD(-sizeof(DbTable));
+	free_dbtable(tb);
 	BIF_ERROR(BIF_P, SYSTEM_LIMIT);
     }
 
@@ -1471,9 +1489,10 @@ BIF_RETTYPE ets_new_2(BIF_ALIST_2)
 	free_slot(slot);
 	erts_smp_rwmtx_rwunlock(mmtl);
 
-	db_lock_take_over_ref(tb,LCK_WRITE);
+	db_lock(tb,LCK_WRITE);
 	free_heir_data(tb);
 	tb->common.meth->db_free_table(tb);
+	schedule_free_dbtable(tb);
 	db_unlock(tb,LCK_WRITE);
 	BIF_ERROR(BIF_P, BADARG);
     }
@@ -2694,7 +2713,6 @@ BIF_RETTYPE ets_match_spec_run_r_3(BIF_ALIST_3)
     Binary *mp;
     Eterm res;
     Uint32 dummy;
-    Uint sz;
 
     if (!(is_list(BIF_ARG_1) || BIF_ARG_1 == NIL) || !is_binary(BIF_ARG_2)) {
     error:
@@ -2719,11 +2737,10 @@ BIF_RETTYPE ets_match_spec_run_r_3(BIF_ALIST_3)
 	    BIF_TRAP3(bif_export[BIF_ets_match_spec_run_r_3],
 		      BIF_P,lst,BIF_ARG_2,ret);
 	}
-	res = db_prog_match(BIF_P, mp, CAR(list_val(lst)), NULL, 0, &dummy);
+	res = db_prog_match(BIF_P, mp, CAR(list_val(lst)), NULL, NULL, 0,
+			    ERTS_PAM_COPY_RESULT, &dummy);
 	if (is_value(res)) {
-	    sz = size_object(res);
-	    hp = HAlloc(BIF_P, sz + 2);
-	    res = copy_struct(res, sz, &hp, &MSO(BIF_P));
+	    hp = HAlloc(BIF_P, 2);
 	    ret = CONS(hp,res,ret);
 	    /*hp += 2;*/
 	} 
@@ -2845,8 +2862,7 @@ void init_db(void)
     meta_pid_to_tab->common.meth   = &db_hash;
     meta_pid_to_tab->common.compress = 0;
 
-    erts_refc_init(&meta_pid_to_tab->common.ref, 1);
-    erts_refc_init(&meta_pid_to_tab->common.fixref, 0);
+    erts_refc_init(&meta_pid_to_tab->common.ref, 0);
     /* Neither rwlock or fixlock used
     db_init_lock(meta_pid_to_tab, "meta_pid_to_tab", "meta_pid_to_tab_FIX");*/
 
@@ -2878,8 +2894,7 @@ void init_db(void)
     meta_pid_to_fixed_tab->common.meth   = &db_hash;
     meta_pid_to_fixed_tab->common.compress = 0;
 
-    erts_refc_init(&meta_pid_to_fixed_tab->common.ref, 1);
-    erts_refc_init(&meta_pid_to_fixed_tab->common.fixref, 0);
+    erts_refc_init(&meta_pid_to_fixed_tab->common.ref, 0);
     /* Neither rwlock or fixlock used
     db_init_lock(meta_pid_to_fixed_tab, "meta_pid_to_fixed_tab", "meta_pid_to_fixed_tab_FIX");*/
 
@@ -3037,12 +3052,10 @@ retry:
 				to_pid, to_locks,
 				ERTS_P2P_FLG_TRY_LOCK);
     if (to_proc == ERTS_PROC_LOCK_BUSY) {
-	db_ref(tb, LCK_NONE); /* while unlocked */
 	db_unlock(tb,LCK_WRITE);    
 	to_proc = erts_pid2proc(p, ERTS_PROC_LOCK_MAIN,
 				to_pid, to_locks);    
 	db_lock(tb,LCK_WRITE);
-	tb = db_unref(tb, LCK_NONE);
 	ASSERT(tb != NULL);
     
 	if (tb->common.owner != p->id) {
@@ -3153,13 +3166,13 @@ erts_db_process_exiting(Process *c_p, ErtsProcLocks c_p_locks)
 		erts_smp_rwmtx_t *mmtl = get_meta_main_tab_lock(ix);
 		erts_smp_rwmtx_rlock(mmtl);
 		if (!IS_SLOT_FREE(ix)) {
-		    tb = db_ref(GET_ANY_SLOT_TAB(ix), LCK_WRITE);
+		    tb = GET_ANY_SLOT_TAB(ix);
 		    ASSERT(tb);
 		}
 		erts_smp_rwmtx_runlock(mmtl);
 		if (tb) {
 		    int do_yield;
-		    db_lock_take_over_ref(tb, LCK_WRITE);
+		    db_lock(tb, LCK_WRITE);
 		    /* Ownership may have changed since
 		       we looked up the table. */
 		    if (tb->common.owner != pid) {
@@ -3241,7 +3254,7 @@ erts_db_process_exiting(Process *c_p, ErtsProcLocks c_p_locks)
 		erts_smp_rwmtx_t *mmtl = get_meta_main_tab_lock(ix);
 		erts_smp_rwmtx_rlock(mmtl);
 		if (IS_SLOT_ALIVE(ix)) {
-		    tb = db_ref(meta_main_tab[ix].u.tb, LCK_WRITE_REC);
+		    tb = meta_main_tab[ix].u.tb;
 		    ASSERT(tb);
 		}
 		erts_smp_rwmtx_runlock(mmtl);
@@ -3249,7 +3262,7 @@ erts_db_process_exiting(Process *c_p, ErtsProcLocks c_p_locks)
 		    int reds;
 		    DbFixation** pp;
 
-		    db_lock_take_over_ref(tb, LCK_WRITE_REC);
+		    db_lock(tb, LCK_WRITE_REC);
 		    #ifdef ERTS_SMP
 		    erts_smp_mtx_lock(&tb->common.fixlock);
 		    #endif
@@ -3260,7 +3273,7 @@ erts_db_process_exiting(Process *c_p, ErtsProcLocks c_p_locks)
 			if ((*pp)->pid == pid) {
 			    DbFixation* fix = *pp;
 			    erts_aint_t diff = -((erts_aint_t) fix->counter);
-			    erts_refc_add(&tb->common.fixref,diff,0);
+			    erts_refc_add(&tb->common.ref,diff,0);
 			    *pp = fix->next;
 			    erts_db_free(ERTS_ALC_T_DB_FIXATION,
 					 tb, fix, sizeof(DbFixation));
@@ -3335,7 +3348,7 @@ static void fix_table_locked(Process* p, DbTable* tb)
 #ifdef ERTS_SMP
     erts_smp_mtx_lock(&tb->common.fixlock);
 #endif
-    erts_refc_inc(&tb->common.fixref,1);
+    erts_refc_inc(&tb->common.ref,1);
     fix = tb->common.fixations;
     if (fix == NULL) { 
 	get_now(&(tb->common.megasec),
@@ -3389,7 +3402,7 @@ static void unfix_table_locked(Process* p,  DbTable* tb,
     for (pp = &tb->common.fixations; *pp != NULL; pp = &(*pp)->next) {
 	if ((*pp)->pid == p->id) {
 	    DbFixation* fix = *pp;
-	    erts_refc_dec(&tb->common.fixref,0);
+	    erts_refc_dec(&tb->common.ref,0);
 	    --(fix->counter);
 	    ASSERT(fix->counter >= 0);
 	    if (fix->counter > 0) {
@@ -3419,7 +3432,6 @@ unlocked:
 #ifdef ERTS_SMP
 	if (*kind_p == LCK_READ && tb->common.is_thread_safe) {
 	    /* Must have write lock while purging pseudo-deleted (OTP-8166) */
-	    db_ref(tb, LCK_WRITE); /* LCK_WRITE need it, but not LCK_READ */
 	    erts_smp_rwmtx_runlock(&tb->common.rwlock);
 	    erts_smp_rwmtx_rwlock(&tb->common.rwlock);
 	    *kind_p = LCK_WRITE;
@@ -3438,6 +3450,8 @@ static void free_fixations_locked(DbTable *tb)
 
     fix = tb->common.fixations;
     while (fix != NULL) {
+	erts_aint_t diff = -((erts_aint_t) fix->counter);
+	erts_refc_add(&tb->common.ref,diff,0);
 	next_fix = fix->next;
 	db_meta_lock(meta_pid_to_fixed_tab, LCK_WRITE_REC);
 	db_erase_bag_exact2(meta_pid_to_fixed_tab,
@@ -3475,11 +3489,24 @@ static void set_heir(Process* me, DbTable* tb, Eterm heir, UWord heir_data)
 
     if (!is_immed(heir_data)) {
 	DeclareTmpHeap(tmp,2,me);
+	Eterm wrap_tpl;
+	int size;
+	DbTerm* dbterm;
+	Eterm* top;
+	ErlOffHeap tmp_offheap;
 
 	UseTmpHeap(2,me);
-	/* Make a dummy 1-tuple around data to use db_get_term() */
-	heir_data = (UWord) db_store_term(&tb->common, NULL, 0,
-					  TUPLE1(tmp,heir_data));
+	/* Make a dummy 1-tuple around data to use DbTerm */
+	wrap_tpl = TUPLE1(tmp,heir_data);
+	size = size_object(wrap_tpl);
+	dbterm = erts_db_alloc(ERTS_ALC_T_DB_HEIR_DATA, (DbTable *)tb,
+			       (sizeof(DbTerm) + sizeof(Eterm)*(size-1)));
+	dbterm->size = size;
+	top = dbterm->tpl;
+	tmp_offheap.first  = NULL;
+	copy_struct(wrap_tpl, size, &top, &tmp_offheap);
+	dbterm->first_oh = tmp_offheap.first;
+	heir_data = (UWord)dbterm;
 	UnUseTmpHeap(2,me);
 	ASSERT(!is_immed(heir_data));
     }
@@ -3491,7 +3518,7 @@ static void free_heir_data(DbTable* tb)
     if (tb->common.heir != am_none && !is_immed(tb->common.heir_data)) {
 	DbTerm* p = (DbTerm*) tb->common.heir_data;
 	db_cleanup_offheap_comp(p);
-	erts_db_free(ERTS_ALC_T_DB_TERM, tb, (void *)p,
+	erts_db_free(ERTS_ALC_T_DB_HEIR_DATA, tb, (void *)p,
 		     sizeof(DbTerm) + (p->size-1)*sizeof(Eterm));
     }
     #ifdef DEBUG
@@ -3561,10 +3588,6 @@ static int free_table_cont(Process *p,
 	mmtl = get_meta_main_tab_lock(tb->common.slot);
 #ifdef ERTS_SMP
 	if (erts_smp_rwmtx_tryrwlock(mmtl) == EBUSY) {
-	    /*
-	     * We keep our increased refc over this op in order to
-	     * prevent the table from disapearing.
-	     */
 	    erts_smp_rwmtx_rwunlock(&tb->common.rwlock);
 	    erts_smp_rwmtx_rwlock(mmtl);
 	    erts_smp_rwmtx_rwlock(&tb->common.rwlock);
@@ -3579,7 +3602,7 @@ static int free_table_cont(Process *p,
 				make_small(tb->common.slot));
 	    db_meta_unlock(meta_pid_to_tab, LCK_WRITE_REC);
 	}
-	db_unref(tb, LCK_NONE);
+	schedule_free_dbtable(tb);
 	BUMP_REDS(p, 100);
 	return 0;
     }
diff --git a/erts/emulator/beam/erl_db_hash.c b/erts/emulator/beam/erl_db_hash.c
index 1e50fee554..9ef990cc4f 100644
--- a/erts/emulator/beam/erl_db_hash.c
+++ b/erts/emulator/beam/erl_db_hash.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1998-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1998-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -258,12 +258,6 @@ static ERTS_INLINE Sint next_slot_w(DbTableHash* tb, Uint ix,
 }
 
 
-/* 
- * tplp is an untagged pointer to a tuple we know is large enough 
- * and dth is a pointer to a DbTableHash.   
- */
-#define GETKEY(dth, tplp)   (*((tplp) +  (dth)->common.keypos))
-
 /*
  * Some special binary flags
  */
@@ -434,6 +428,9 @@ static ERTS_INLINE void try_shrink(DbTableHash* tb)
     }
 }	
 
+#define EQ_REL(x,y,y_base) \
+    (is_same(x,NULL,y,y_base) || (is_not_both_immed((x),(y)) && eq_rel((x),NULL,(y),y_base)))
+
 /* Is this a live object (not pseodo-deleted) with the specified key? 
 */
 static ERTS_INLINE int has_live_key(DbTableHash* tb, HashDbTerm* b,
@@ -443,7 +440,7 @@ static ERTS_INLINE int has_live_key(DbTableHash* tb, HashDbTerm* b,
     else {
 	Eterm itemKey = GETKEY(tb, b->dbterm.tpl);
 	ASSERT(!is_header(itemKey));
-	return EQ(key,itemKey);
+	return EQ_REL(key, itemKey, b->dbterm.tpl);
     }
 }
 
@@ -456,7 +453,7 @@ static ERTS_INLINE int has_key(DbTableHash* tb, HashDbTerm* b,
     else {
 	Eterm itemKey = GETKEY(tb, b->dbterm.tpl);
 	ASSERT(!is_header(itemKey));
-	return EQ(key,itemKey);
+	return EQ_REL(key, itemKey, b->dbterm.tpl);
     }
 }
 
@@ -696,9 +693,7 @@ static int db_first_hash(Process *p, DbTable *tbl, Eterm *ret)
 	}
     }
     if (list != NULL) {
-	Eterm key = GETKEY(tb, list->dbterm.tpl);
-	
-	COPY_OBJECT(key, p, ret);
+	*ret = db_copy_key(p, tbl, &list->dbterm);
 	RUNLOCK_HASH(lck);
     }
     else {
@@ -746,7 +741,7 @@ static int db_next_hash(Process *p, DbTable *tbl, Eterm key, Eterm *ret)
 	*ret = am_EOT;
     }
     else {
-	COPY_OBJECT(GETKEY(tb, b->dbterm.tpl), p, ret);
+	*ret = db_copy_key(p, tbl, &b->dbterm);
 	RUNLOCK_HASH(lck);
     }    
     return DB_ERROR_NONE;
@@ -1308,8 +1303,8 @@ static int db_select_continue_hash(Process *p,
     }	  
     for(;;) {
 	if (current->hvalue != INVALID_HASH && 
-	    (match_res = db_prog_match_and_copy(&tb->common, p, mp, all_objects,
-						&current->dbterm, &hp, 2),
+	    (match_res = db_match_dbterm(&tb->common, p, mp, all_objects,
+					 &current->dbterm, &hp, 2),
 	     is_value(match_res))) {
 
 	    match_list = CONS(hp, match_res, match_list);
@@ -1473,8 +1468,8 @@ static int db_select_chunk_hash(Process *p, DbTable *tbl,
     for(;;) {
 	if (current != NULL) {
 	    if (current->hvalue != INVALID_HASH) {
-		match_res = db_prog_match_and_copy(&tb->common, p, mpi.mp, 0,
-						   &current->dbterm, &hp, 2);
+		match_res = db_match_dbterm(&tb->common, p, mpi.mp, 0,
+					    &current->dbterm, &hp, 2);
 		if (is_value(match_res)) {
 		    match_list = CONS(hp, match_res, match_list);
 		    ++got;
@@ -1639,8 +1634,8 @@ static int db_select_count_hash(Process *p,
     for(;;) {
 	if (current != NULL) {
 	    if (current->hvalue != INVALID_HASH) {
-		if (db_prog_match_and_copy(&tb->common, p, mpi.mp, 0,
-					   &current->dbterm, NULL,0) == am_true) {
+		if (db_match_dbterm(&tb->common, p, mpi.mp, 0,
+				    &current->dbterm, NULL,0) == am_true) {
 		    ++got;
 		}
 		--num_left;
@@ -1788,8 +1783,8 @@ static int db_select_delete_hash(Process *p,
 	} 
 	else {
 	    int did_erase = 0;
-	    if (db_prog_match_and_copy(&tb->common, p, mpi.mp, 0,
-				       &(*current)->dbterm, NULL, 0) == am_true) {
+	    if (db_match_dbterm(&tb->common, p, mpi.mp, 0,
+				&(*current)->dbterm, NULL, 0) == am_true) {
 		if (NFIXED(tb) > fixated_by_me) { /* fixated by others? */
 		    if (slot_ix != last_pseudo_delete) {
 			add_fixed_deletion(tb, slot_ix);
@@ -1899,8 +1894,8 @@ static int db_select_delete_continue_hash(Process *p,
 	} 
 	else {
 	    int did_erase = 0;
-	    if (db_prog_match_and_copy(&tb->common, p, mp, 0,
-				       &(*current)->dbterm, NULL, 0) == am_true) {
+	    if (db_match_dbterm(&tb->common, p, mp, 0,
+				&(*current)->dbterm, NULL, 0) == am_true) {
 		if (NFIXED(tb) > fixated_by_me) { /* fixated by others? */
 		    if (slot_ix != last_pseudo_delete) {
 			add_fixed_deletion(tb, slot_ix);
@@ -1999,8 +1994,8 @@ static int db_select_count_continue_hash(Process *p,
 		current = current->next;
 		continue;
 	    }
-	    if (db_prog_match_and_copy(&tb->common, p, mp, 0, &current->dbterm,
-				       NULL, 0) == am_true) {
+	    if (db_match_dbterm(&tb->common, p, mp, 0, &current->dbterm,
+				NULL, 0) == am_true) {
 		++got;
 	    }
 	    --num_left;
@@ -2179,7 +2174,7 @@ static int analyze_pattern(DbTableHash *tb, Eterm pattern,
     HashValue hval = NIL;      
     int num_heads = 0;
     int i;
-    
+
     mpi->lists = mpi->dlists;
     mpi->num_lists = 0;
     mpi->key_given = 1;
@@ -2695,6 +2690,9 @@ static int db_lookup_dbterm_hash(DbTable *tbl, Eterm key, DbUpdateHandle* handle
 	    handle->dbterm = &b->dbterm;
 	    handle->mustResize = 0;
 	    handle->new_size = b->dbterm.size;
+	#if HALFWORD_HEAP
+	    handle->abs_vec = NULL;
+	#endif
 	    handle->lck = lck;
 	    /* KEEP hval WLOCKED, db_finalize_dbterm_hash will WUNLOCK */
 	    return 1;
diff --git a/erts/emulator/beam/erl_db_tree.c b/erts/emulator/beam/erl_db_tree.c
index 8108494fc5..6cdbec3213 100644
--- a/erts/emulator/beam/erl_db_tree.c
+++ b/erts/emulator/beam/erl_db_tree.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1998-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1998-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -48,9 +48,6 @@
 
 #include "erl_db_tree.h"
 
-
-
-#define GETKEY(dtt, tplp)   (*((tplp) +  (dtt)->common.keypos))
 #define GETKEY_WITH_POS(Keypos, Tplp) (*((Tplp) + Keypos))
 #define NITEMS(tb) ((int)erts_smp_atomic_read(&(tb)->common.nitems))
 
@@ -282,7 +279,7 @@ struct select_delete_context {
 /*
 ** Forward declarations 
 */
-static TreeDbTerm *linkout_tree(DbTableTree *tb, Eterm key);
+static TreeDbTerm *linkout_tree(DbTableTree *tb, Eterm key, Eterm* key_base);
 static TreeDbTerm *linkout_object_tree(DbTableTree *tb, 
 				       Eterm object);
 static int do_free_tree_cont(DbTableTree *tb, int num_left);
@@ -293,15 +290,15 @@ static int delsub(TreeDbTerm **this);
 static TreeDbTerm *slot_search(Process *p, DbTableTree *tb, Sint slot);
 static TreeDbTerm *find_node(DbTableTree *tb, Eterm key);
 static TreeDbTerm **find_node2(DbTableTree *tb, Eterm key);
-static TreeDbTerm *find_next(DbTableTree *tb, DbTreeStack*, Eterm key);
-static TreeDbTerm *find_prev(DbTableTree *tb, DbTreeStack*, Eterm key);
+static TreeDbTerm *find_next(DbTableTree *tb, DbTreeStack*, Eterm key, Eterm* kbase);
+static TreeDbTerm *find_prev(DbTableTree *tb, DbTreeStack*, Eterm key, Eterm* kbase);
 static TreeDbTerm *find_next_from_pb_key(DbTableTree *tb, DbTreeStack*,
 					 Eterm key);
 static TreeDbTerm *find_prev_from_pb_key(DbTableTree *tb, DbTreeStack*,
 					 Eterm key);
 static void traverse_backwards(DbTableTree *tb,
 			       DbTreeStack*,
-			       Eterm lastkey,
+			       Eterm lastkey, Eterm* lk_base,
 			       int (*doit)(DbTableTree *tb,
 					   TreeDbTerm *,
 					   void *,
@@ -309,7 +306,7 @@ static void traverse_backwards(DbTableTree *tb,
 			       void *context); 
 static void traverse_forward(DbTableTree *tb,
 			     DbTreeStack*,
-			     Eterm lastkey,
+			     Eterm lastkey, Eterm* lk_base,
 			     int (*doit)(DbTableTree *tb,
 					 TreeDbTerm *,
 					 void *,
@@ -317,8 +314,8 @@ static void traverse_forward(DbTableTree *tb,
 			     void *context); 
 static int key_given(DbTableTree *tb, Eterm pattern, TreeDbTerm **ret,
 		     Eterm *partly_bound_key);
-static Sint cmp_partly_bound(Eterm partly_bound_key, Eterm bound_key);
-static Sint do_cmp_partly_bound(Eterm a, Eterm b, int *done);
+static Sint cmp_partly_bound(Eterm partly_bound_key, Eterm bound_key, Eterm* bk_base);
+static Sint do_cmp_partly_bound(Eterm a, Eterm b, Eterm* b_base, int *done);
 
 static int analyze_pattern(DbTableTree *tb, Eterm pattern, 
 			   struct mp_info *mpi);
@@ -338,7 +335,6 @@ static int doit_select_delete(DbTableTree *tb,
 			      TreeDbTerm *this,
 			      void *ptr,
 			      int forward);
-static void do_dump_tree(int to, void *to_arg, TreeDbTerm *t);
 
 static int partly_bound_can_match_lesser(Eterm partly_bound_1, 
 					 Eterm partly_bound_2);
@@ -492,9 +488,6 @@ static int db_first_tree(Process *p, DbTable *tbl, Eterm *ret)
     DbTableTree *tb = &tbl->tree;
     DbTreeStack* stack;
     TreeDbTerm *this;
-    Eterm e;
-    Eterm *hp;
-    Uint sz;
 
     if (( this = tb->root ) == NULL) {
 	*ret = am_EOT;
@@ -513,13 +506,7 @@ static int db_first_tree(Process *p, DbTable *tbl, Eterm *ret)
 	stack->slot = 1;
 	release_stack(tb,stack);
     }
-    e = GETKEY(tb, this->dbterm.tpl);
-    sz = size_object(e);
-
-    hp = HAlloc(p, sz);
-
-    *ret = copy_struct(e,sz,&hp,&MSO(p));
-    
+    *ret = db_copy_key(p, tbl, &this->dbterm);
     return DB_ERROR_NONE;
 }
 
@@ -528,26 +515,17 @@ static int db_next_tree(Process *p, DbTable *tbl, Eterm key, Eterm *ret)
     DbTableTree *tb = &tbl->tree;
     DbTreeStack* stack;
     TreeDbTerm *this;
-    Eterm e;
-    Eterm *hp;
-    Uint sz;
 
     if (is_atom(key) && key == am_EOT)
 	return DB_ERROR_BADKEY;
     stack = get_any_stack(tb);
-    this = find_next(tb, stack, key);
+    this = find_next(tb, stack, key, NULL);
     release_stack(tb,stack);
     if (this == NULL) {
 	*ret = am_EOT;
 	return DB_ERROR_NONE;
     }
-    e = GETKEY(tb, this->dbterm.tpl);
-    sz = size_object(e);
-
-    hp = HAlloc(p, sz);
-
-    *ret = copy_struct(e,sz,&hp,&MSO(p));
-    
+    *ret = db_copy_key(p, tbl, &this->dbterm);
     return DB_ERROR_NONE;
 }
 
@@ -556,9 +534,6 @@ static int db_last_tree(Process *p, DbTable *tbl, Eterm *ret)
     DbTableTree *tb = &tbl->tree;
     TreeDbTerm *this;
     DbTreeStack* stack;
-    Eterm e;
-    Eterm *hp;
-    Uint sz;
 
     if (( this = tb->root ) == NULL) {
 	*ret = am_EOT;
@@ -577,13 +552,7 @@ static int db_last_tree(Process *p, DbTable *tbl, Eterm *ret)
 	stack->slot = NITEMS(tb);
 	release_stack(tb,stack);
     }
-    e = GETKEY(tb, this->dbterm.tpl);
-    sz = size_object(e);
-
-    hp = HAlloc(p, sz);
-
-    *ret = copy_struct(e,sz,&hp,&MSO(p));
-    
+    *ret = db_copy_key(p, tbl, &this->dbterm);
     return DB_ERROR_NONE;
 }
 
@@ -592,27 +561,33 @@ static int db_prev_tree(Process *p, DbTable *tbl, Eterm key, Eterm *ret)
     DbTableTree *tb = &tbl->tree;
     TreeDbTerm *this;
     DbTreeStack* stack;
-    Eterm e;
-    Eterm *hp;
-    Uint sz;
 
     if (is_atom(key) && key == am_EOT)
 	return DB_ERROR_BADKEY;
     stack = get_any_stack(tb);
-    this = find_prev(tb, stack, key);
+    this = find_prev(tb, stack, key, NULL);
     release_stack(tb,stack);
     if (this == NULL) {
 	*ret = am_EOT;
 	return DB_ERROR_NONE;
     }
-    e = GETKEY(tb, this->dbterm.tpl);
-    sz = size_object(e);
+    *ret = db_copy_key(p, tbl, &this->dbterm);
+    return DB_ERROR_NONE;
+}
 
-    hp = HAlloc(p, sz);
+static ERTS_INLINE int cmp_key(DbTableTree* tb, Eterm key, Eterm* key_base,
+			       TreeDbTerm* obj)
+{
+    return cmp_rel(key, key_base,
+		   GETKEY(tb,obj->dbterm.tpl), obj->dbterm.tpl);
+}
 
-    *ret = copy_struct(e,sz,&hp,&MSO(p));
-    
-    return DB_ERROR_NONE;
+static ERTS_INLINE int cmp_key_eq(DbTableTree* tb, Eterm key, Eterm* key_base,
+				  TreeDbTerm* obj)
+{
+    Eterm obj_key = GETKEY(tb,obj->dbterm.tpl);
+    return is_same(key, key_base, obj_key, obj->dbterm.tpl)
+	|| cmp_rel(key, key_base, obj_key, obj->dbterm.tpl) == 0;
 }
 
 static int db_put_tree(DbTable *tbl, Eterm obj, int key_clash_fail)
@@ -646,8 +621,8 @@ static int db_put_tree(DbTable *tbl, Eterm obj, int key_clash_fail)
 	    (*this)->balance = 0;
 	    (*this)->left = (*this)->right = NULL;
 	    break;
-	} else if ((c = cmp(key,GETKEY(tb,(*this)->dbterm.tpl))) < 0) { 
-	    /* go left */
+	} else if ((c = cmp_key(tb, key, NULL, *this)) < 0) {
+	    /* go lefts */
 	    dstack[dpos++] = DIR_LEFT;
 	    tstack[tpos++] = this;
 	    this = &((*this)->left);
@@ -801,7 +776,7 @@ static int db_erase_tree(DbTable *tbl, Eterm key, Eterm *ret)
 
     *ret = am_true;
 
-    if ((res = linkout_tree(tb, key)) != NULL) {
+    if ((res = linkout_tree(tb, key, NULL)) != NULL) {
 	free_term(tb, res);
     }
     return DB_ERROR_NONE;
@@ -993,15 +968,15 @@ static int db_select_continue_tree(Process *p,
     stack = get_any_stack(tb);
     if (chunk_size) {
 	if (reverse) {
-	    traverse_backwards(tb, stack, lastkey, &doit_select_chunk, &sc); 
+	    traverse_backwards(tb, stack, lastkey, NULL, &doit_select_chunk, &sc);
 	} else {
-	    traverse_forward(tb, stack, lastkey, &doit_select_chunk, &sc); 
+	    traverse_forward(tb, stack, lastkey, NULL, &doit_select_chunk, &sc);
 	}
     } else {
 	if (reverse) {
-	    traverse_forward(tb, stack, lastkey, &doit_select, &sc);
+	    traverse_forward(tb, stack, lastkey, NULL, &doit_select, &sc);
 	} else {
-	    traverse_backwards(tb, stack, lastkey, &doit_select, &sc);
+	    traverse_backwards(tb, stack, lastkey, NULL, &doit_select, &sc);
 	}
     }
     release_stack(tb,stack);
@@ -1026,10 +1001,9 @@ static int db_select_continue_tree(Process *p,
 	    }
 
 	    key = GETKEY(tb, sc.lastobj);
-
-	    sz = size_object(key);
+	    sz = size_object_rel(key,sc.lastobj);
 	    hp = HAlloc(p, 9 + sz);
-	    key = copy_struct(key, sz, &hp, &MSO(p));
+	    key = copy_struct_rel(key, sz, &hp, &MSO(p), sc.lastobj, NULL);
 	    continuation = TUPLE8
 		(hp,
 		 tptr[1],
@@ -1050,8 +1024,8 @@ static int db_select_continue_tree(Process *p,
     key = GETKEY(tb, sc.lastobj);
     if (chunk_size) {
 	if (end_condition != NIL && 
-	    ((!reverse && cmp_partly_bound(end_condition,key) < 0) ||
-	     (reverse && cmp_partly_bound(end_condition,key) > 0))) { 
+	    ((!reverse && cmp_partly_bound(end_condition,key,sc.lastobj) < 0) ||
+	     (reverse && cmp_partly_bound(end_condition,key,sc.lastobj) > 0))) {
 	    /* done anyway */
 	    if (!sc.got) {
 		RET_TO_BIF(am_EOT, DB_ERROR_NONE);
@@ -1063,16 +1037,16 @@ static int db_select_continue_tree(Process *p,
 	}
     } else {
 	if (end_condition != NIL && 
-	    ((!reverse && cmp_partly_bound(end_condition,key) > 0) ||
-	     (reverse && cmp_partly_bound(end_condition,key) < 0))) { 
+	    ((!reverse && cmp_partly_bound(end_condition,key,sc.lastobj) > 0) ||
+	     (reverse && cmp_partly_bound(end_condition,key,sc.lastobj) < 0))) {
 	    /* done anyway */
 	    RET_TO_BIF(sc.accum,DB_ERROR_NONE);
 	}
     }
     /* Not done yet, let's trap. */
-    sz = size_object(key);
+    sz = size_object_rel(key,sc.lastobj);
     hp = HAlloc(p, 9 + sz);
-    key = copy_struct(key, sz, &hp, &MSO(p));
+    key = copy_struct_rel(key, sz, &hp, &MSO(p), sc.lastobj, NULL);
     continuation = TUPLE8
 	(hp,
 	 tptr[1],
@@ -1099,6 +1073,7 @@ static int db_select_tree(Process *p, DbTable *tbl,
     struct select_context sc;
     struct mp_info mpi;
     Eterm lastkey = THE_NON_VALUE;
+    Eterm* lk_base = NULL;
     Eterm key;
     Eterm continuation;
     unsigned sz;
@@ -1140,7 +1115,7 @@ static int db_select_tree(Process *p, DbTable *tbl,
     sc.all_objects = mpi.all_objects;
 
     if (!mpi.got_partial && mpi.some_limitation && 
-	cmp(mpi.least,mpi.most) == 0) {
+	CMP(mpi.least,mpi.most) == 0) {
 	doit_select(tb,mpi.save_term,&sc,0 /* direction doesn't matter */);
 	RET_TO_BIF(sc.accum,DB_ERROR_NONE);
     }
@@ -1150,20 +1125,20 @@ static int db_select_tree(Process *p, DbTable *tbl,
 	if (mpi.some_limitation) {
 	    if ((this = find_prev_from_pb_key(tb, stack, mpi.least)) != NULL) {
 		lastkey = GETKEY(tb, this->dbterm.tpl);
+		lk_base = this->dbterm.tpl;
 	    }
 	    sc.end_condition = mpi.most;
 	}
-	
-	traverse_forward(tb, stack, lastkey, &doit_select, &sc);
+	traverse_forward(tb, stack, lastkey, lk_base, &doit_select, &sc);
     } else {
 	if (mpi.some_limitation) {
 	    if ((this = find_next_from_pb_key(tb, stack, mpi.most)) != NULL) {
 		lastkey = GETKEY(tb, this->dbterm.tpl);
+		lk_base = this->dbterm.tpl;
 	    }
 	    sc.end_condition = mpi.least;
 	}
-	
-	traverse_backwards(tb, stack, lastkey, &doit_select, &sc);
+	traverse_backwards(tb, stack, lastkey, lk_base, &doit_select, &sc);
     }
     release_stack(tb,stack);
 #ifdef HARDDEBUG
@@ -1176,9 +1151,9 @@ static int db_select_tree(Process *p, DbTable *tbl,
     }
 
     key = GETKEY(tb, sc.lastobj);
-    sz = size_object(key);
+    sz = size_object_rel(key, sc.lastobj);
     hp = HAlloc(p, 9 + sz + PROC_BIN_SIZE);
-    key = copy_struct(key, sz, &hp, &MSO(p));
+    key = copy_struct_rel(key, sz, &hp, &MSO(p), sc.lastobj, NULL);
     if (mpi.all_objects)
 	(mpi.mp)->flags |= BIN_FLAG_ALL_OBJECTS;
     mpb=db_make_mp_binary(p,mpi.mp,&hp);
@@ -1259,7 +1234,7 @@ static int db_select_count_continue_tree(Process *p,
     }
 
     stack = get_any_stack(tb);
-    traverse_backwards(tb, stack, lastkey, &doit_select_count, &sc);
+    traverse_backwards(tb, stack, lastkey, NULL, &doit_select_count, &sc);
     release_stack(tb,stack);
 
     BUMP_REDS(p, 1000 - sc.max);
@@ -1269,12 +1244,12 @@ static int db_select_count_continue_tree(Process *p,
     }	
     key = GETKEY(tb, sc.lastobj);
     if (end_condition != NIL && 
-	(cmp_partly_bound(end_condition,key) > 0)) { 
+	(cmp_partly_bound(end_condition,key,sc.lastobj) > 0)) {
 	/* done anyway */
 	RET_TO_BIF(make_small(sc.got),DB_ERROR_NONE);
     }
     /* Not done yet, let's trap. */
-    sz = size_object(key);
+    sz = size_object_rel(key, sc.lastobj);
     if (IS_USMALL(0, sc.got)) {
 	hp = HAlloc(p, sz + 6);
 	egot = make_small(sc.got);
@@ -1284,7 +1259,7 @@ static int db_select_count_continue_tree(Process *p,
 	egot = uint_to_big(sc.got, hp);
 	hp += BIG_UINT_HEAP_SIZE;
     }
-    key = copy_struct(key, sz, &hp, &MSO(p));
+    key = copy_struct_rel(key, sz, &hp, &MSO(p), sc.lastobj, NULL);
     continuation = TUPLE5
 	(hp,
 	 tptr[1],
@@ -1307,6 +1282,7 @@ static int db_select_count_tree(Process *p, DbTable *tbl,
     struct select_count_context sc;
     struct mp_info mpi;
     Eterm lastkey = THE_NON_VALUE;
+    Eterm* lk_base = NULL;
     Eterm key;
     Eterm continuation;
     unsigned sz;
@@ -1347,7 +1323,7 @@ static int db_select_count_tree(Process *p, DbTable *tbl,
     sc.all_objects = mpi.all_objects;
 
     if (!mpi.got_partial && mpi.some_limitation && 
-	cmp(mpi.least,mpi.most) == 0) {
+	CMP(mpi.least,mpi.most) == 0) {
 	doit_select_count(tb,mpi.save_term,&sc,0 /* dummy */);
 	RET_TO_BIF(erts_make_integer(sc.got,p),DB_ERROR_NONE);
     }
@@ -1356,11 +1332,12 @@ static int db_select_count_tree(Process *p, DbTable *tbl,
     if (mpi.some_limitation) {
 	if ((this = find_next_from_pb_key(tb, stack, mpi.most)) != NULL) {
 	    lastkey = GETKEY(tb, this->dbterm.tpl);
+	    lk_base = this->dbterm.tpl;
 	}
 	sc.end_condition = mpi.least;
     }
     
-    traverse_backwards(tb, stack, lastkey, &doit_select_count, &sc);
+    traverse_backwards(tb, stack, lastkey, lk_base, &doit_select_count, &sc);
     release_stack(tb,stack);
     BUMP_REDS(p, 1000 - sc.max);
     if (sc.max > 0) {
@@ -1368,7 +1345,7 @@ static int db_select_count_tree(Process *p, DbTable *tbl,
     }
 
     key = GETKEY(tb, sc.lastobj);
-    sz = size_object(key);
+    sz = size_object_rel(key, sc.lastobj);
     if (IS_USMALL(0, sc.got)) {
 	hp = HAlloc(p, sz + PROC_BIN_SIZE + 6);
 	egot = make_small(sc.got);
@@ -1378,7 +1355,7 @@ static int db_select_count_tree(Process *p, DbTable *tbl,
 	egot = uint_to_big(sc.got, hp);
 	hp += BIG_UINT_HEAP_SIZE;
     }
-    key = copy_struct(key, sz, &hp, &MSO(p));
+    key = copy_struct_rel(key, sz, &hp, &MSO(p), sc.lastobj, NULL);
     if (mpi.all_objects)
 	(mpi.mp)->flags |= BIN_FLAG_ALL_OBJECTS;
     mpb = db_make_mp_binary(p,mpi.mp,&hp);
@@ -1409,6 +1386,7 @@ static int db_select_chunk_tree(Process *p, DbTable *tbl,
     struct select_context sc;
     struct mp_info mpi;
     Eterm lastkey = THE_NON_VALUE;
+    Eterm* lk_base = NULL;
     Eterm key;
     Eterm continuation;
     unsigned sz;
@@ -1450,7 +1428,7 @@ static int db_select_chunk_tree(Process *p, DbTable *tbl,
     sc.all_objects = mpi.all_objects;
 
     if (!mpi.got_partial && mpi.some_limitation && 
-	cmp(mpi.least,mpi.most) == 0) {
+	CMP(mpi.least,mpi.most) == 0) {
 	doit_select(tb,mpi.save_term,&sc, 0 /* direction doesn't matter */);
 	if (sc.accum != NIL) {
 	    hp=HAlloc(p, 3);
@@ -1465,20 +1443,20 @@ static int db_select_chunk_tree(Process *p, DbTable *tbl,
 	if (mpi.some_limitation) {
 	    if ((this = find_next_from_pb_key(tb, stack, mpi.most)) != NULL) {
 		lastkey = GETKEY(tb, this->dbterm.tpl);
+		lk_base = this->dbterm.tpl;
 	    }
 	    sc.end_condition = mpi.least;
 	}
-
-	traverse_backwards(tb, stack, lastkey, &doit_select_chunk, &sc);
+	traverse_backwards(tb, stack, lastkey, lk_base, &doit_select_chunk, &sc);
     } else {
 	if (mpi.some_limitation) {
 	    if ((this = find_prev_from_pb_key(tb, stack, mpi.least)) != NULL) {
 		lastkey = GETKEY(tb, this->dbterm.tpl);
+		lk_base = this->dbterm.tpl;
 	    }
 	    sc.end_condition = mpi.most;
 	}
-
-	traverse_forward(tb, stack, lastkey, &doit_select_chunk, &sc);
+	traverse_forward(tb, stack, lastkey, lk_base, &doit_select_chunk, &sc);
     }
     release_stack(tb,stack);
 
@@ -1503,9 +1481,9 @@ static int db_select_chunk_tree(Process *p, DbTable *tbl,
 	}
 
 	key = GETKEY(tb, sc.lastobj);
-	sz = size_object(key);
+	sz = size_object_rel(key, sc.lastobj);
 	hp = HAlloc(p, 9 + sz + PROC_BIN_SIZE);
-	key = copy_struct(key, sz, &hp, &MSO(p));
+	key = copy_struct_rel(key, sz, &hp, &MSO(p), sc.lastobj, NULL);
 	if (mpi.all_objects)
 	    (mpi.mp)->flags |= BIN_FLAG_ALL_OBJECTS;
 	mpb = db_make_mp_binary(p,mpi.mp,&hp);
@@ -1528,9 +1506,9 @@ static int db_select_chunk_tree(Process *p, DbTable *tbl,
     }
 
     key = GETKEY(tb, sc.lastobj);
-    sz = size_object(key);
+    sz = size_object_rel(key, sc.lastobj);
     hp = HAlloc(p, 9 + sz + PROC_BIN_SIZE);
-    key = copy_struct(key, sz, &hp, &MSO(p));
+    key = copy_struct_rel(key, sz, &hp, &MSO(p), sc.lastobj, NULL);
 
     if (mpi.all_objects)
 	(mpi.mp)->flags |= BIN_FLAG_ALL_OBJECTS;
@@ -1606,7 +1584,7 @@ static int db_select_delete_continue_tree(Process *p,
     sc.keypos = tb->common.keypos;
 
     ASSERT(!erts_smp_atomic_read(&tb->is_stack_busy));
-    traverse_backwards(tb, &tb->static_stack, lastkey, &doit_select_delete, &sc);
+    traverse_backwards(tb, &tb->static_stack, lastkey, NULL, &doit_select_delete, &sc);
 
     BUMP_REDS(p, 1000 - sc.max);
 
@@ -1615,11 +1593,11 @@ static int db_select_delete_continue_tree(Process *p,
     }	
     key = GETKEY(tb, (sc.lastterm)->dbterm.tpl);
     if (end_condition != NIL && 
-	cmp_partly_bound(end_condition,key) > 0) { /* done anyway */
+	cmp_partly_bound(end_condition,key,sc.lastterm->dbterm.tpl) > 0) { /* done anyway */
 	RET_TO_BIF(erts_make_integer(sc.accum,p),DB_ERROR_NONE);
     }
     /* Not done yet, let's trap. */
-    sz = size_object(key);
+    sz = size_object_rel(key, sc.lastterm->dbterm.tpl);
     if (IS_USMALL(0, sc.accum)) {
 	hp = HAlloc(p, sz + 6);
 	eaccsum = make_small(sc.accum);
@@ -1629,7 +1607,7 @@ static int db_select_delete_continue_tree(Process *p,
 	eaccsum = uint_to_big(sc.accum, hp);
 	hp += BIG_UINT_HEAP_SIZE;
     }
-    key = copy_struct(key, sz, &hp, &MSO(p));
+    key = copy_struct_rel(key, sz, &hp, &MSO(p), sc.lastterm->dbterm.tpl, NULL);
     continuation = TUPLE5
 	(hp,
 	 tptr[1],
@@ -1650,6 +1628,7 @@ static int db_select_delete_tree(Process *p, DbTable *tbl,
     struct select_delete_context sc;
     struct mp_info mpi;
     Eterm lastkey = THE_NON_VALUE;
+    Eterm* lk_base = NULL;
     Eterm key;
     Eterm continuation;
     unsigned sz;
@@ -1693,7 +1672,7 @@ static int db_select_delete_tree(Process *p, DbTable *tbl,
     sc.mp = mpi.mp;
 
     if (!mpi.got_partial && mpi.some_limitation && 
-	cmp(mpi.least,mpi.most) == 0) {
+	CMP(mpi.least,mpi.most) == 0) {
 	doit_select_delete(tb,mpi.save_term,&sc, 0 /* direction doesn't 
 						      matter */);
 	RET_TO_BIF(erts_make_integer(sc.accum,p),DB_ERROR_NONE);
@@ -1702,11 +1681,12 @@ static int db_select_delete_tree(Process *p, DbTable *tbl,
     if (mpi.some_limitation) {
 	if ((this = find_next_from_pb_key(tb, &tb->static_stack, mpi.most)) != NULL) {
 	    lastkey = GETKEY(tb, this->dbterm.tpl);
+	    lk_base = this->dbterm.tpl;
 	}
 	sc.end_condition = mpi.least;
     }
 
-    traverse_backwards(tb, &tb->static_stack, lastkey, &doit_select_delete, &sc);
+    traverse_backwards(tb, &tb->static_stack, lastkey, lk_base, &doit_select_delete, &sc);
     BUMP_REDS(p, 1000 - sc.max);
 
     if (sc.max > 0) {
@@ -1714,7 +1694,7 @@ static int db_select_delete_tree(Process *p, DbTable *tbl,
     }
 
     key = GETKEY(tb, (sc.lastterm)->dbterm.tpl);
-    sz = size_object(key);
+    sz = size_object_rel(key, sc.lastterm->dbterm.tpl);
     if (IS_USMALL(0, sc.accum)) {
 	hp = HAlloc(p, sz + PROC_BIN_SIZE + 6);
 	eaccsum = make_small(sc.accum);
@@ -1724,7 +1704,7 @@ static int db_select_delete_tree(Process *p, DbTable *tbl,
 	eaccsum = uint_to_big(sc.accum, hp);
 	hp += BIG_UINT_HEAP_SIZE;
     }
-    key = copy_struct(key, sz, &hp, &MSO(p));
+    key = copy_struct_rel(key, sz, &hp, &MSO(p), sc.lastterm->dbterm.tpl, NULL);
     mpb = db_make_mp_binary(p,mpi.mp,&hp);
     
     continuation = TUPLE5
@@ -1766,7 +1746,6 @@ static void db_print_tree(int to, void *to_arg,
 		   "------------------------------------------------\n");
 #else
     erts_print(to, to_arg, "Ordered set (AVL tree), Elements: %d\n", NITEMS(tb));
-    do_dump_tree(to, to_arg, tb->root);
 #endif
 }
 
@@ -1842,7 +1821,7 @@ do_db_tree_foreach_offheap(TreeDbTerm *tdbt,
 }
 
 static TreeDbTerm *linkout_tree(DbTableTree *tb, 
-				Eterm key)
+				Eterm key, Eterm* key_base)
 {
     TreeDbTerm **tstack[STACK_NEED];
     int tpos = 0;
@@ -1865,7 +1844,7 @@ static TreeDbTerm *linkout_tree(DbTableTree *tb,
     for (;;) {
 	if (!*this) { /* Failure */
 	    return NULL;
-	} else if ((c = cmp(key,GETKEY(tb,(*this)->dbterm.tpl))) < 0) { 
+	} else if ((c = cmp_key(tb, key, key_base, *this)) < 0) {
 	    dstack[dpos++] = DIR_LEFT;
 	    tstack[tpos++] = this;
 	    this = &((*this)->left);
@@ -1929,7 +1908,7 @@ static TreeDbTerm *linkout_object_tree(DbTableTree *tb,
     for (;;) {
 	if (!*this) { /* Failure */
 	    return NULL;
-	} else if ((c = cmp(key,GETKEY(tb,(*this)->dbterm.tpl))) < 0) { 
+	} else if ((c = cmp_key(tb,key,NULL,*this)) < 0) {
 	    dstack[dpos++] = DIR_LEFT;
 	    tstack[tpos++] = this;
 	    this = &((*this)->left);
@@ -2082,15 +2061,6 @@ static int analyze_pattern(DbTableTree *tb, Eterm pattern,
     return DB_ERROR_NONE;
 }
 
-static void do_dump_tree(int to, void *to_arg, TreeDbTerm *t)
-{
-    if (t != NULL) {
-	do_dump_tree(to, to_arg, t->left);
-	erts_print(to, to_arg, "%T\n", make_tuple(t->dbterm.tpl));
-	do_dump_tree(to, to_arg, t->right); 
-    }
-}
-
 static int do_free_tree_cont(DbTableTree *tb, int num_left)
 {
     TreeDbTerm *root;
@@ -2324,14 +2294,15 @@ done:
  * Find next and previous in sort order
  */
 
-static TreeDbTerm *find_next(DbTableTree *tb, DbTreeStack* stack, Eterm key)
+static TreeDbTerm *find_next(DbTableTree *tb, DbTreeStack* stack,
+			     Eterm key, Eterm* key_base)
 {
     TreeDbTerm *this;
     TreeDbTerm *tmp;
     Sint c;
 
     if(( this = TOP_NODE(stack)) != NULL) {
-	if (!CMP_EQ(GETKEY(tb, this->dbterm.tpl),key)) {
+	if (!cmp_key_eq(tb,key,key_base,this)) {
 	    /* Start from the beginning */
 	    stack->pos = stack->slot = 0;
 	}
@@ -2341,14 +2312,14 @@ static TreeDbTerm *find_next(DbTableTree *tb, DbTreeStack* stack, Eterm key)
 	    return NULL;
 	for (;;) {
 	    PUSH_NODE(stack, this);
-	    if (( c = cmp(GETKEY(tb, this->dbterm.tpl),key) ) < 0) {
+	    if (( c = cmp_key(tb,key,key_base,this) ) > 0) {
 		if (this->right == NULL) /* We are at the previos 
 					    and the element does
 					    not exist */
 		    break;
 		else
 		    this = this->right;
-	    } else if (c > 0) {
+	    } else if (c < 0) {
 		if (this->left == NULL) /* Done */
 		    return this;
 		else
@@ -2381,14 +2352,15 @@ static TreeDbTerm *find_next(DbTableTree *tb, DbTreeStack* stack, Eterm key)
     return this;
 }
 
-static TreeDbTerm *find_prev(DbTableTree *tb, DbTreeStack* stack, Eterm key)
+static TreeDbTerm *find_prev(DbTableTree *tb, DbTreeStack* stack,
+			     Eterm key, Eterm* key_base)
 {
     TreeDbTerm *this;
     TreeDbTerm *tmp;
     Sint c;
 
     if(( this = TOP_NODE(stack)) != NULL) {
-	if (!CMP_EQ(GETKEY(tb, this->dbterm.tpl),key)) {
+	if (!cmp_key_eq(tb,key,key_base,this)) {
 	    /* Start from the beginning */
 	    stack->pos = stack->slot = 0;
 	}
@@ -2398,14 +2370,14 @@ static TreeDbTerm *find_prev(DbTableTree *tb, DbTreeStack* stack, Eterm key)
 	    return NULL;
 	for (;;) {
 	    PUSH_NODE(stack, this);
-	    if (( c = cmp(GETKEY(tb, this->dbterm.tpl),key) ) > 0) {
+	    if (( c = cmp_key(tb,key,key_base,this) ) < 0) {
 		if (this->left == NULL) /* We are at the next 
 					   and the element does
 					   not exist */
 		    break;
 		else
 		    this = this->left;
-	    } else if (c < 0) {
+	    } else if (c > 0) {
 		if (this->right == NULL) /* Done */
 		    return this;
 		else
@@ -2451,7 +2423,8 @@ static TreeDbTerm *find_next_from_pb_key(DbTableTree *tb, DbTreeStack* stack,
 	return NULL;
     for (;;) {
 	PUSH_NODE(stack, this);
-	if (( c = cmp_partly_bound(key,GETKEY(tb, this->dbterm.tpl)) ) >= 0) {
+	if (( c = cmp_partly_bound(key,GETKEY(tb, this->dbterm.tpl),
+				   this->dbterm.tpl) ) >= 0) {
 	    if (this->right == NULL) {
 		do {
 		    tmp = POP_NODE(stack);
@@ -2484,7 +2457,8 @@ static TreeDbTerm *find_prev_from_pb_key(DbTableTree *tb, DbTreeStack* stack,
 	return NULL;
     for (;;) {
 	PUSH_NODE(stack, this);
-	if (( c = cmp_partly_bound(key,GETKEY(tb, this->dbterm.tpl)) ) <= 0) {
+	if (( c = cmp_partly_bound(key,GETKEY(tb, this->dbterm.tpl),
+				   this->dbterm.tpl) ) <= 0) {
 	    if (this->left == NULL) {
 		do {
 		    tmp = POP_NODE(stack);
@@ -2514,12 +2488,11 @@ static TreeDbTerm *find_node(DbTableTree *tb, Eterm key)
     Sint res;
     DbTreeStack* stack = get_static_stack(tb);
 
-    if(!stack || EMPTY_NODE(stack) 
-       || !CMP_EQ(GETKEY(tb, ( this = TOP_NODE(stack) )->dbterm.tpl), key)) {
+    if(!stack || EMPTY_NODE(stack)
+       || !cmp_key_eq(tb, key, NULL, (this=TOP_NODE(stack)))) {
 
 	this = tb->root;
-	while (this != NULL && 
-	       ( res = cmp(key, GETKEY(tb, this->dbterm.tpl)) ) != 0) {
+	while (this != NULL && (res = cmp_key(tb,key,NULL,this)) != 0) {
 	    if (res < 0)
 		this = this->left;
 	    else
@@ -2541,8 +2514,7 @@ static TreeDbTerm **find_node2(DbTableTree *tb, Eterm key)
     Sint res;
 
     this = &tb->root;
-    while ((*this) != NULL && 
-	   ( res = cmp(key, GETKEY(tb, (*this)->dbterm.tpl)) ) != 0) {
+    while ((*this) != NULL && (res = cmp_key(tb, key, NULL, *this)) != 0) {
 	if (res < 0)
 	    this = &((*this)->left);
 	else
@@ -2565,6 +2537,9 @@ static int db_lookup_dbterm_tree(DbTable *tbl, Eterm key, DbUpdateHandle* handle
     handle->mustResize = 0;
     handle->bp = (void**) pp;
     handle->new_size = (*pp)->dbterm.size;
+#if HALFWORD_HEAP
+    handle->abs_vec = NULL;
+#endif
     return 1;
 }
 
@@ -2589,7 +2564,7 @@ static void db_finalize_dbterm_tree(DbUpdateHandle* handle)
  */
 static void traverse_backwards(DbTableTree *tb,
 			       DbTreeStack* stack,
-			       Eterm lastkey,
+			       Eterm lastkey, Eterm* lk_base,
 			       int (*doit)(DbTableTree *,
 					   TreeDbTerm *,
 					   void *,
@@ -2608,15 +2583,16 @@ static void traverse_backwards(DbTableTree *tb,
 	    this = this->right;
 	}
 	this = TOP_NODE(stack);
-	next = find_prev(tb, stack, GETKEY(tb, this->dbterm.tpl));
+	next = find_prev(tb, stack, GETKEY(tb, this->dbterm.tpl),
+			 this->dbterm.tpl);
 	if (!((*doit)(tb, this, context, 0)))
 	    return;
     } else {
-	next = find_prev(tb, stack, lastkey);
+	next = find_prev(tb, stack, lastkey, lk_base);
     }
 
     while ((this = next) != NULL) {
-	next = find_prev(tb, stack, GETKEY(tb, this->dbterm.tpl));
+	next = find_prev(tb, stack, GETKEY(tb, this->dbterm.tpl), this->dbterm.tpl);
 	if (!((*doit)(tb, this, context, 0)))
 	    return;
     }
@@ -2627,7 +2603,7 @@ static void traverse_backwards(DbTableTree *tb,
  */
 static void traverse_forward(DbTableTree *tb,
 			     DbTreeStack* stack,
-			     Eterm lastkey,
+			     Eterm lastkey, Eterm* lk_base,
 			     int (*doit)(DbTableTree *,
 					 TreeDbTerm *,
 					 void *,
@@ -2646,15 +2622,15 @@ static void traverse_forward(DbTableTree *tb,
 	    this = this->left;
 	}
 	this = TOP_NODE(stack);
-	next = find_next(tb, stack, GETKEY(tb, this->dbterm.tpl));
+	next = find_next(tb, stack, GETKEY(tb, this->dbterm.tpl), this->dbterm.tpl);
 	if (!((*doit)(tb, this, context, 1)))
 	    return;
     } else {
-	next = find_next(tb, stack, lastkey);
+	next = find_next(tb, stack, lastkey, lk_base);
     }
 
     while ((this = next) != NULL) {
-	next = find_next(tb, stack, GETKEY(tb, this->dbterm.tpl));
+	next = find_next(tb, stack, GETKEY(tb, this->dbterm.tpl), this->dbterm.tpl);
 	if (!((*doit)(tb, this, context, 1)))
 	    return;
     }
@@ -2680,7 +2656,7 @@ static int key_given(DbTableTree *tb, Eterm pattern, TreeDbTerm **ret,
 	if (( this = find_node(tb, key) ) == NULL) {
 	    return -1;
 	}
-	*ret = this; 
+	*ret = this;
 	return 1;
     } else if (partly_bound != NULL && key != am_Underscore && 
 	       db_is_variable(key) < 0)
@@ -2691,7 +2667,7 @@ static int key_given(DbTableTree *tb, Eterm pattern, TreeDbTerm **ret,
 
 
 
-static Sint do_cmp_partly_bound(Eterm a, Eterm b, int *done)
+static Sint do_cmp_partly_bound(Eterm a, Eterm b, Eterm* b_base, int *done)
 {
     Eterm* aa;
     Eterm* bb;
@@ -2705,44 +2681,44 @@ static Sint do_cmp_partly_bound(Eterm a, Eterm b, int *done)
 	*done = 1;
 	return 0;
     }
-    if (a == b)
+    if (is_same(a,NULL,b,b_base))
 	return 0;
     
     switch (a & _TAG_PRIMARY_MASK) {
     case TAG_PRIMARY_LIST:
 	if (!is_list(b)) {
-	    return cmp(a,b);
+	    return cmp_rel(a,NULL,b,b_base);
 	}
 	aa = list_val(a);
-	bb = list_val(b);
+	bb = list_val_rel(b,b_base);
 	while (1) {
-	    if ((j = do_cmp_partly_bound(*aa++, *bb++, done)) != 0 || *done) 
+	    if ((j = do_cmp_partly_bound(*aa++, *bb++, b_base, done)) != 0 || *done)
 		return j;
 	    if (*aa==*bb)
 		return 0;
 	    if (is_not_list(*aa) || is_not_list(*bb))
-		return do_cmp_partly_bound(*aa, *bb, done);
+		return do_cmp_partly_bound(*aa, *bb, b_base, done);
 	    aa = list_val(*aa);
-	    bb = list_val(*bb);
+	    bb = list_val_rel(*bb,b_base);
 	}
     case TAG_PRIMARY_BOXED:
 	if ((b & _TAG_PRIMARY_MASK) != TAG_PRIMARY_BOXED) {
-	    return cmp(a,b);
+	    return cmp_rel(a,NULL,b,b_base);
 	}
 	a_hdr = ((*boxed_val(a)) & _TAG_HEADER_MASK) >> _TAG_PRIMARY_SIZE;
-	b_hdr = ((*boxed_val(b)) & _TAG_HEADER_MASK) >> _TAG_PRIMARY_SIZE;
+	b_hdr = ((*boxed_val_rel(b,b_base)) & _TAG_HEADER_MASK) >> _TAG_PRIMARY_SIZE;
 	if (a_hdr != b_hdr) {
-	    return cmp(a, b);
+	    return cmp_rel(a, NULL, b, b_base);
 	}
 	if (a_hdr == (_TAG_HEADER_ARITYVAL >> _TAG_PRIMARY_SIZE)) {
 	    aa = tuple_val(a);
-	    bb = tuple_val(b);
+	    bb = tuple_val_rel(b, b_base);
 	    /* compare the arities */
 	    i = arityval(*aa);	/* get the arity*/
 	    if (i < arityval(*bb)) return(-1);
 	    if (i > arityval(*bb)) return(1);
 	    while (i--) {
-		if ((j = do_cmp_partly_bound(*++aa, *++bb, done)) != 0 
+		if ((j = do_cmp_partly_bound(*++aa, *++bb, b_base, done)) != 0
 		    || *done) 
 		    return j;
 	    }
@@ -2750,14 +2726,14 @@ static Sint do_cmp_partly_bound(Eterm a, Eterm b, int *done)
 	}
 	/* Drop through */
       default:
-	  return cmp(a, b);
+	  return cmp_rel(a, NULL, b, b_base);
     }
 }
 
-static Sint cmp_partly_bound(Eterm partly_bound_key, Eterm bound_key) 
+static Sint cmp_partly_bound(Eterm partly_bound_key, Eterm bound_key, Eterm* bk_base)
 {
     int done = 0;
-    Sint ret = do_cmp_partly_bound(partly_bound_key, bound_key, &done);
+    Sint ret = do_cmp_partly_bound(partly_bound_key, bound_key, bk_base, &done);
 #ifdef HARDDEBUG
     erts_fprintf(stderr,"\ncmp_partly_bound: %T", partly_bound_key);
     if (ret < 0)
@@ -2766,7 +2742,7 @@ static Sint cmp_partly_bound(Eterm partly_bound_key, Eterm bound_key)
 	erts_fprintf(stderr," > ");
     else
 	erts_fprintf(stderr," == ");
-    erts_fprintf(stderr,"%T\n",bound_key);
+    erts_fprintf(stderr,"%T\n",bound_key);  // HALFWORD BUG: printing rterm
 #endif
     return ret;
 }
@@ -2853,7 +2829,7 @@ static int do_partly_bound_can_match_lesser(Eterm a, Eterm b,
 
     if (not_eq_tags(a,b)) {
 	*done = 1;
-	return (cmp(a, b) < 0) ? 1 : 0;
+	return (CMP(a, b) < 0) ? 1 : 0;
     }
 
     /* we now know that tags are the same */
@@ -2889,7 +2865,7 @@ static int do_partly_bound_can_match_lesser(Eterm a, Eterm b,
 	    bb = list_val(*bb);
 	}
     default:
-	if((i = cmp(a, b)) != 0) {
+	if((i = CMP(a, b)) != 0) {
 	    *done = 1;
 	}
 	return (i < 0) ? 1 : 0;
@@ -2924,7 +2900,7 @@ static int do_partly_bound_can_match_greater(Eterm a, Eterm b,
 
     if (not_eq_tags(a,b)) {
 	*done = 1;
-	return (cmp(a, b) > 0) ? 1 : 0;
+	return (CMP(a, b) > 0) ? 1 : 0;
     }
 
     /* we now know that tags are the same */
@@ -2960,7 +2936,7 @@ static int do_partly_bound_can_match_greater(Eterm a, Eterm b,
 	    bb = list_val(*bb);
 	}
     default:
-	if((i = cmp(a, b)) != 0) {
+	if((i = CMP(a, b)) != 0) {
 	    *done = 1;
 	}
 	return (i > 0) ? 1 : 0;
@@ -2983,16 +2959,16 @@ static int doit_select(DbTableTree *tb, TreeDbTerm *this, void *ptr,
     if (sc->end_condition != NIL && 
 	((forward && 
 	  cmp_partly_bound(sc->end_condition, 
-			   GETKEY_WITH_POS(sc->keypos, 
-					   this->dbterm.tpl)) < 0) ||
+			   GETKEY_WITH_POS(sc->keypos, this->dbterm.tpl),
+			   this->dbterm.tpl) < 0) ||
 	 (!forward && 
 	  cmp_partly_bound(sc->end_condition, 
-			   GETKEY_WITH_POS(sc->keypos, 
-					   this->dbterm.tpl)) > 0))) {
+			   GETKEY_WITH_POS(sc->keypos, this->dbterm.tpl),
+			   this->dbterm.tpl) > 0))) {
 	return 0;
     }
-    ret = db_prog_match_and_copy(&tb->common,sc->p,sc->mp,sc->all_objects,
-				 &this->dbterm, &hp, 2);
+    ret = db_match_dbterm(&tb->common,sc->p,sc->mp,sc->all_objects,
+			  &this->dbterm, &hp, 2);
     if (is_value(ret)) {
 	sc->accum = CONS(hp, ret, sc->accum);
     }
@@ -3020,12 +2996,12 @@ static int doit_select_count(DbTableTree *tb, TreeDbTerm *this, void *ptr,
     /* Always backwards traversing */
     if (sc->end_condition != NIL && 
 	(cmp_partly_bound(sc->end_condition, 
-			  GETKEY_WITH_POS(sc->keypos, 
-					  this->dbterm.tpl)) > 0)) {
+			  GETKEY_WITH_POS(sc->keypos, this->dbterm.tpl),
+			  this->dbterm.tpl) > 0)) {
 	return 0;
     }
-    ret = db_prog_match_and_copy(&tb->common, sc->p, sc->mp, 0,
-				 &this->dbterm, NULL, 0);
+    ret = db_match_dbterm(&tb->common, sc->p, sc->mp, 0,
+			  &this->dbterm, NULL, 0);
     if (ret == am_true) {
 	++(sc->got);
     }
@@ -3047,17 +3023,17 @@ static int doit_select_chunk(DbTableTree *tb, TreeDbTerm *this, void *ptr,
     if (sc->end_condition != NIL && 
 	((forward && 
 	  cmp_partly_bound(sc->end_condition, 
-			   GETKEY_WITH_POS(sc->keypos, 
-					   this->dbterm.tpl)) < 0) ||
+			   GETKEY_WITH_POS(sc->keypos, this->dbterm.tpl),
+			   this->dbterm.tpl) < 0) ||
 	 (!forward && 
 	  cmp_partly_bound(sc->end_condition, 
-			   GETKEY_WITH_POS(sc->keypos, 
-					   this->dbterm.tpl)) > 0))) {
+			   GETKEY_WITH_POS(sc->keypos, this->dbterm.tpl),
+			   this->dbterm.tpl) > 0))) {
 	return 0;
     }
 
-    ret = db_prog_match_and_copy(&tb->common, sc->p, sc->mp, sc->all_objects,
-				 &this->dbterm, &hp, 2);
+    ret = db_match_dbterm(&tb->common, sc->p, sc->mp, sc->all_objects,
+			  &this->dbterm, &hp, 2);
     if (is_value(ret)) {
 	++(sc->got);
 	sc->accum = CONS(hp, ret, sc->accum);
@@ -3090,14 +3066,14 @@ static int doit_select_delete(DbTableTree *tb, TreeDbTerm *this, void *ptr,
     
     if (sc->end_condition != NIL && 
 	cmp_partly_bound(sc->end_condition, 
-			 GETKEY_WITH_POS(sc->keypos, 
-					 this->dbterm.tpl)) > 0)
+			 GETKEY_WITH_POS(sc->keypos, this->dbterm.tpl),
+			 this->dbterm.tpl) > 0)
 	return 0;
-    ret = db_prog_match_and_copy(&tb->common, sc->p, sc->mp, 0,
-				 &this->dbterm, NULL, 0);
+    ret = db_match_dbterm(&tb->common, sc->p, sc->mp, 0,
+			  &this->dbterm, NULL, 0);
     if (ret == am_true) {
 	key = GETKEY(sc->tb, this->dbterm.tpl);
-	linkout_tree(sc->tb, key);
+	linkout_tree(sc->tb, key, this->dbterm.tpl);
 	sc->erase_lastterm = 1;
 	++sc->accum;
     }
diff --git a/erts/emulator/beam/erl_db_util.c b/erts/emulator/beam/erl_db_util.c
index 2852fb93fe..d3e31da413 100644
--- a/erts/emulator/beam/erl_db_util.c
+++ b/erts/emulator/beam/erl_db_util.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1998-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1998-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -57,6 +57,7 @@
 DBIF_TABLE_GUARD | DBIF_TABLE_BODY | DBIF_TRACE_GUARD | DBIF_TRACE_BODY
 
 
+#define HEAP_XTRA 100
 
 /*
 ** Some convenience macros for stacks (DMC == db_match_compile)
@@ -229,6 +230,11 @@ typedef enum {
     matchCall2,
     matchCall3,
     matchPushV,
+#if HALFWORD_HEAP
+    matchPushVGuard,    /* First guard-only variable reference */
+#endif
+    matchPushVResult, /* First variable reference in result, or (if HALFWORD)
+                         in guard if also referenced in result */
     matchPushExpr, /* Push the whole expression we're matching ('$_') */
     matchPushArrayAsList, /* Only when parameter is an Array and 
 			     not an erlang term  (DCOMP_TRACE) */
@@ -292,11 +298,19 @@ DMC_DECLARE_STACK_TYPE(unsigned);
 ** Data about the heap during compilation
 */
 
+typedef struct DMCVariable {
+    int is_bound;
+    int is_in_body;
+#if HALFWORD_HEAP
+    int first_guard_label;  /* to maybe change from PushVGuard to PushVResult */
+#endif
+} DMCVariable;
+
 typedef struct DMCHeap {
     int size;
-    unsigned def[DMC_DEFAULT_SIZE];
-    unsigned *data;
-    int used;
+    DMCVariable vars_def[DMC_DEFAULT_SIZE];
+    DMCVariable* vars;
+    int vars_used;
 } DMCHeap;
 
 /*
@@ -323,7 +337,6 @@ typedef struct dmc_context {
     Eterm *bodyexpr;
     int num_match;
     int current_match;
-    int eheap_need;
     Uint cflags;
     int is_guard; /* 1 if in guard, 0 if in body */
     int special; /* 1 if the head in the match was a single expression */ 
@@ -346,9 +359,22 @@ typedef struct dmc_context {
 
 #define ERTS_DEFAULT_MS_HEAP_SIZE 128
 
+/* Runtime info about a $-variable
+*/
+typedef struct MatchVariable {
+    Eterm term;
+#ifdef DEBUG
+    Process* proc;
+    Eterm* base;
+#endif
+} MatchVariable;
+
 typedef struct {
     Process process;
-    Eterm *heap;
+    union {
+	Eterm* heap;
+	MatchVariable* variables;   /* first on "heap" */
+    }u;
     Eterm default_heap[ERTS_DEFAULT_MS_HEAP_SIZE];
 } ErtsMatchPseudoProcess;
 
@@ -371,10 +397,10 @@ cleanup_match_pseudo_process(ErtsMatchPseudoProcess *mpsp, int keep_heap)
     }
 #endif
     if (!keep_heap) {
-	if (mpsp->heap != &mpsp->default_heap[0]) {
+	if (mpsp->u.heap != mpsp->default_heap) {
 	    /* Have to be done *after* call to erts_cleanup_empty_process() */
-	    erts_free(ERTS_ALC_T_DB_MS_RUN_HEAP, (void *) mpsp->heap);
-	    mpsp->heap = &mpsp->default_heap[0];
+	    erts_free(ERTS_ALC_T_DB_MS_RUN_HEAP, (void *) mpsp->u.heap);
+	    mpsp->u.heap = mpsp->default_heap;
 	}
 #ifdef DEBUG
 	else {
@@ -398,7 +424,7 @@ create_match_pseudo_process(void)
     mpsp = (ErtsMatchPseudoProcess *)erts_alloc(ERTS_ALC_T_DB_MS_PSDO_PROC,
 						sizeof(ErtsMatchPseudoProcess));
     erts_init_empty_process(&mpsp->process);
-    mpsp->heap = &mpsp->default_heap[0];
+    mpsp->u.heap = mpsp->default_heap;
     return mpsp;
 }
 
@@ -422,11 +448,11 @@ get_match_pseudo_process(Process *c_p, Uint heap_size)
     mpsp = match_pseudo_process;
     cleanup_match_pseudo_process(mpsp, 0);
 #endif
-    if (heap_size > ERTS_DEFAULT_MS_HEAP_SIZE)
-	mpsp->heap = (Eterm *) erts_alloc(ERTS_ALC_T_DB_MS_RUN_HEAP,
-					  heap_size*sizeof(Uint));
+    if (heap_size > ERTS_DEFAULT_MS_HEAP_SIZE*sizeof(Eterm)) {
+	mpsp->u.heap = (Eterm*) erts_alloc(ERTS_ALC_T_DB_MS_RUN_HEAP, heap_size);
+    }
     else {
-	ASSERT(mpsp->heap == &mpsp->default_heap[0]);
+	ASSERT(mpsp->u.heap == mpsp->default_heap);
     }
     return mpsp;
 }
@@ -467,23 +493,6 @@ erts_match_set_release_result(Process* c_p)
 
 static erts_smp_atomic_t trace_control_word;
 
-
-Eterm
-erts_ets_copy_object(Eterm obj, Process* to)
-{
-    Uint size = size_object(obj);
-    Eterm* hp = HAlloc(to, size);
-    Eterm res;
-
-    res = copy_struct(obj, size, &hp, &MSO(to));
-#ifdef DEBUG
-    if (eq(obj, res) == 0) {
-	erl_exit(1, "copy not equal to source\n");
-    }
-#endif
-    return res;
-}
-
 /* This needs to be here, before the bif table... */
 
 static Eterm db_set_trace_control_word_fake_1(Process *p, Eterm val);
@@ -869,9 +878,9 @@ static DMCRet dmc_one_term(DMCContext *context,
 
 #ifdef DMC_DEBUG
 static int test_disassemble_next = 0;
-static void db_match_dis(Binary *prog);
+void db_match_dis(Binary *prog);
 #define TRACE erts_fprintf(stderr,"Trace: %s:%d\n",__FILE__,__LINE__)
-#define FENCE_PATTERN_SIZE 1
+#define FENCE_PATTERN_SIZE (1*sizeof(Uint))
 #define FENCE_PATTERN 0xDEADBEEFUL
 #else
 #define TRACE /* Nothing */
@@ -1179,14 +1188,14 @@ done:
 }
     
 Eterm erts_match_set_run(Process *p, Binary *mpsp, 
-			 Eterm *args, int num_args, 
+			 Eterm *args, int num_args,
+			 enum erts_pam_run_flags in_flags,
 			 Uint32 *return_flags) 
 {
     Eterm ret;
 
-    ret = db_prog_match(p, mpsp,
-			NIL, args,
-			num_args, return_flags);
+    ret = db_prog_match(p, mpsp, NIL, NULL, args, num_args,
+			in_flags, return_flags);
 #if defined(HARDDEBUG)
     if (is_non_value(ret)) {
 	erts_fprintf(stderr, "Failed\n");
@@ -1210,9 +1219,9 @@ static Eterm erts_match_set_run_ets(Process *p, Binary *mpsp,
 {
     Eterm ret;
 
-    ret = db_prog_match(p, mpsp,
-			args, NULL,
-			num_args, return_flags);
+    ret = db_prog_match(p, mpsp, args, NULL, NULL, num_args,
+			ERTS_PAM_CONTIGUOUS_TUPLE | ERTS_PAM_COPY_RESULT,
+			return_flags);
 #if defined(HARDDEBUG)
     if (is_non_value(ret)) {
 	erts_fprintf(stderr, "Failed\n");
@@ -1280,7 +1289,6 @@ Binary *db_match_compile(Eterm *matchexpr,
     int structure_checked;
     DMCRet res;
     int current_try_label;
-    Uint max_eheap_need;
     Binary *bp = NULL;
     unsigned clause_start;
 
@@ -1293,27 +1301,24 @@ Binary *db_match_compile(Eterm *matchexpr,
     context.matchexpr = matchexpr;
     context.guardexpr = guards;
     context.bodyexpr = body;
-    context.eheap_need = 0;
     context.err_info = err_info;
     context.cflags = flags;
 
     heap.size = DMC_DEFAULT_SIZE;
-    heap.data = heap.def;
+    heap.vars = heap.vars_def;
 
     /*
     ** Compile the match expression
     */
 restart:
-    heap.used = 0;
-    max_eheap_need = 0;
+    heap.vars_used = 0;
     for (context.current_match = 0; 
 	 context.current_match < num_progs; 
 	 ++context.current_match) { /* This loop is long, 
 				       too long */
-	memset(heap.data, 0, heap.size * sizeof(*heap.data));
+	memset(heap.vars, 0, heap.size * sizeof(*heap.vars));
 	t = context.matchexpr[context.current_match];
 	context.stack_used = 0;
-	context.eheap_need = 0;
 	structure_checked = 0;
 	if (context.current_match < num_progs - 1) {
 	    DMC_PUSH(text,matchTryMeElse);
@@ -1485,10 +1490,6 @@ restart:
 	if (current_try_label >= 0) {
 	    DMC_POKE(text, current_try_label, DMC_STACK_NUM(text));
 	}
-	/* So, how much eheap did this part of the match program need? */
-	if (context.eheap_need > max_eheap_need) {
-	    max_eheap_need = context.eheap_need;
-	}
     } /* for (context.current_match = 0 ...) */
 
 
@@ -1524,16 +1525,13 @@ restart:
     ret->saved_program_buf = NULL;
     ret->saved_program = NIL;
     ret->term_save = context.save;
-    ret->num_bindings = heap.used;
+    ret->num_bindings = heap.vars_used;
     ret->single_variable = context.special;
     sys_memcpy(ret->text, DMC_STACK_DATA(text), 
 	       DMC_STACK_NUM(text) * sizeof(UWord));
-    ret->heap_size = ((heap.used * sizeof(Eterm)) +
-		      (max_eheap_need * sizeof(Eterm)) +
-		      (context.stack_need * sizeof(Eterm *)) +
-		      (3 * (FENCE_PATTERN_SIZE * sizeof(Eterm *))));
-    ret->eheap_offset = heap.used + FENCE_PATTERN_SIZE;
-    ret->stack_offset = ret->eheap_offset + max_eheap_need + FENCE_PATTERN_SIZE;
+    ret->stack_offset = heap.vars_used*sizeof(MatchVariable) + FENCE_PATTERN_SIZE;
+    ret->heap_size = ret->stack_offset + context.stack_need * sizeof(Eterm*) + FENCE_PATTERN_SIZE;
+
 #ifdef DMC_DEBUG
     ret->prog_end = ret->text + DMC_STACK_NUM(text);
 #endif
@@ -1551,8 +1549,8 @@ error: /* Here is were we land when compilation failed. */
     DMC_FREE(text);
     if (context.copy != NULL) 
 	free_message_buffer(context.copy);
-    if (heap.data != heap.def)
-	erts_free(ERTS_ALC_T_DB_MS_CMPL_HEAP, (void *) heap.data);
+    if (heap.vars != heap.vars_def)
+	erts_free(ERTS_ALC_T_DB_MS_CMPL_HEAP, (void *) heap.vars);
     return bp;
 }
 
@@ -1597,7 +1595,7 @@ erts_match_prog_foreach_offheap(Binary *bprog,
 */
 static Eterm dpm_array_to_list(Process *psp, Eterm *arr, int arity)
 {
-    Eterm *hp = HAlloc(psp, arity * 2);
+    Eterm *hp = HAllocX(psp, arity * 2, HEAP_XTRA);
     Eterm ret = NIL;
     while (--arity >= 0) {
 	ret = CONS(hp, arr[arity], ret);
@@ -1606,15 +1604,82 @@ static Eterm dpm_array_to_list(Process *psp, Eterm *arr, int arity)
     return ret;
 }
 
+
+#if HALFWORD_HEAP
+struct heap_checkpoint_t
+{
+    Process *p;
+    Eterm* htop;
+    ErlHeapFragment* mbuf;
+    unsigned used_size;
+    ErlOffHeap off_heap;
+};
+
+static void heap_checkpoint_init(Process* p, struct heap_checkpoint_t* hcp)
+{
+    hcp->p = p;
+    hcp->htop = HEAP_TOP(p);
+    hcp->mbuf = MBUF(p);
+    hcp->used_size = hcp->mbuf ? hcp->mbuf->used_size : 0;
+    hcp->off_heap = MSO(p);
+}
+
+static void heap_checkpoint_revert(struct heap_checkpoint_t* hcp)
+{
+    struct erl_off_heap_header* oh = MSO(hcp->p).first;
+
+    if (oh != hcp->off_heap.first) {
+	ASSERT(oh != NULL);
+	if (hcp->off_heap.first) {
+	    while (oh->next != hcp->off_heap.first) {
+		oh = oh->next;
+	    }
+	    oh->next = NULL;
+	}
+	erts_cleanup_offheap(&MSO(hcp->p));
+	MSO(hcp->p) = hcp->off_heap;
+    }
+    if (MBUF(hcp->p) != hcp->mbuf) {
+	ErlHeapFragment* hf = MBUF(hcp->p);
+	ASSERT(hf != NULL);
+	if (hcp->mbuf) {
+	    while (hf->next != hcp->mbuf) {
+		hf = hf->next;
+	    }
+	    hf->next = NULL;
+	}
+	free_message_buffer(MBUF(hcp->p));
+	MBUF(hcp->p) = hcp->mbuf;
+    }
+    if (hcp->mbuf != NULL && hcp->mbuf->used_size != hcp->used_size) {
+	hcp->mbuf->used_size = hcp->used_size;
+    }
+    HEAP_TOP(hcp->p) = hcp->htop;
+}
+#endif /* HALFWORD_HEAP */
+
+static ERTS_INLINE Eterm copy_object_rel(Process* p, Eterm term, Eterm* base)
+{
+    if (!is_immed(term)) {
+	Uint sz = size_object_rel(term, base);
+	Eterm* top = HAllocX(p, sz, HEAP_XTRA);
+	return copy_struct_rel(term, sz, &top, &MSO(p), base, NULL);
+    }
+    return term;
+}
+
+
 /*
 ** Execution of the match program, this is Pam.
 ** May return THE_NON_VALUE, which is a bailout.
-** the para meter 'arity' is only used if 'term' is actually an array,
+** the parameter 'arity' is only used if 'term' is actually an array,
 ** i.e. 'DCOMP_TRACE' was specified 
 */
-Eterm db_prog_match(Process *c_p, Binary *bprog, Eterm term, 
+Eterm db_prog_match(Process *c_p, Binary *bprog,
+		    Eterm term, Eterm* base,
 		    Eterm *termp,
 		    int arity,
+		    enum erts_pam_run_flags in_flags,
 		    Uint32 *return_flags)
 {
     MatchProg *prog = Binary2MatchProg(bprog);
@@ -1623,7 +1688,7 @@ Eterm db_prog_match(Process *c_p, Binary *bprog, Eterm term,
     Eterm t;
     Eterm **sp;
     Eterm *esp;
-    Eterm *hp;
+    MatchVariable* variables;
     BeamInstr *cp;
     UWord *pc = prog->text;
     Eterm *ehp;
@@ -1633,19 +1698,24 @@ Eterm db_prog_match(Process *c_p, Binary *bprog, Eterm term,
     unsigned do_catch;
     ErtsMatchPseudoProcess *mpsp;
     Process *psp;
+    Process* build_proc;
     Process *tmpp;
     Process *current_scheduled;
     ErtsSchedulerData *esdp;
     Eterm (*bif)(Process*, ...);
     int fail_label;
     int atomic_trace;
+#if HALFWORD_HEAP
+    struct heap_checkpoint_t c_p_checkpoint = {};
+#endif
 #ifdef DMC_DEBUG
     Uint *heap_fence;
-    Uint *eheap_fence;
     Uint *stack_fence;
     Uint save_op;
 #endif /* DMC_DEBUG */
 
+    ASSERT(base==NULL || HALFWORD_HEAP);
+
     mpsp = get_match_pseudo_process(c_p, prog->heap_size);
     psp = &mpsp->process;
 
@@ -1655,7 +1725,6 @@ Eterm db_prog_match(Process *c_p, Binary *bprog, Eterm term,
     esdp = ERTS_GET_SCHEDULER_DATA_FROM_PROC(c_p);
     ASSERT(esdp != NULL);
     current_scheduled = esdp->current_process;
-    esdp->current_process = psp;
     /* SMP: psp->scheduler_data is set by get_match_pseudo_process */
 
     atomic_trace = 0;
@@ -1678,11 +1747,9 @@ Eterm db_prog_match(Process *c_p, Binary *bprog, Eterm term,
 
 #ifdef DMC_DEBUG
     save_op = 0;
-    heap_fence =  (Uint *) mpsp->heap + prog->eheap_offset - 1;
-    eheap_fence = (Uint *) mpsp->heap + prog->stack_offset - 1;
-    stack_fence = (Uint *) mpsp->heap + prog->heap_size - 1;
+    heap_fence = (Eterm*)((char*) mpsp->u.heap + prog->stack_offset) - 1;
+    stack_fence = (Eterm*)((char*) mpsp->u.heap + prog->heap_size) - 1;
     *heap_fence = FENCE_PATTERN;
-    *eheap_fence = FENCE_PATTERN;
     *stack_fence = FENCE_PATTERN;
 #endif /* DMC_DEBUG */
 
@@ -1696,36 +1763,48 @@ Eterm db_prog_match(Process *c_p, Binary *bprog, Eterm term,
 
     *return_flags = 0U;
 
+    variables = mpsp->u.variables;
+#if HALFWORD_HEAP
+    c_p_checkpoint.p = NULL;
+#endif
+
 restart:
     ep = &term;
-    esp = mpsp->heap + prog->stack_offset;
+    esp = (Eterm*)((char*)mpsp->u.heap + prog->stack_offset);
     sp = (Eterm **) esp;
-    hp = mpsp->heap;
-    ehp = mpsp->heap + prog->eheap_offset;
     ret = am_true;
     do_catch = 0;
     fail_label = -1;
+    build_proc = psp;
+    esdp->current_process = psp;
+    ASSERT_HALFWORD(!c_p_checkpoint.p);
+
+#ifdef DEBUG
+    ASSERT(variables == mpsp->u.variables);
+    for (i=0; i<prog->num_bindings; i++) {
+	variables[i].term = THE_NON_VALUE;
+	variables[i].proc = NULL;
+	variables[i].base = base;
+    }
+#endif
 
     for (;;) {
-#ifdef DMC_DEBUG
+
+    #ifdef DMC_DEBUG
 	if (*heap_fence != FENCE_PATTERN) {
 	    erl_exit(1, "Heap fence overwritten in db_prog_match after op "
 		     "0x%08x, overwritten with 0x%08x.", save_op, *heap_fence);
 	}
-	if (*eheap_fence != FENCE_PATTERN) {
-	    erl_exit(1, "Eheap fence overwritten in db_prog_match after op "
-		     "0x%08x, overwritten with 0x%08x.", save_op, 
-		     *eheap_fence);
-	}
 	if (*stack_fence != FENCE_PATTERN) {
 	    erl_exit(1, "Stack fence overwritten in db_prog_match after op "
 		     "0x%08x, overwritten with 0x%08x.", save_op, 
 		     *stack_fence);
 	}
 	save_op = *pc;
-#endif
+    #endif
 	switch (*pc++) {
 	case matchTryMeElse:
+	    ASSERT(fail_label == -1);
 	    fail_label = *pc++;
 	    break;
 	case matchArray: /* only when DCOMP_TRACE, is always first
@@ -1736,13 +1815,14 @@ restart:
 	    ep = termp;
 	    break;
 	case matchArrayBind: /* When the array size is unknown. */
+	    ASSERT(termp);
 	    n = *pc++;
-	    hp[n] = dpm_array_to_list(psp, termp, arity);
+	    variables[n].term = dpm_array_to_list(psp, termp, arity);
 	    break;
 	case matchTuple: /* *ep is a tuple of arity n */
-	    if (!is_tuple(*ep))
+	    if (!is_tuple_rel(*ep,base))
 		FAIL();
-	    ep = tuple_val(*ep);
+	    ep = tuple_val_rel(*ep,base);
 	    n = *pc++;
 	    if (arityval(*ep) != n)
 		FAIL();
@@ -1750,9 +1830,9 @@ restart:
 	    break;
 	case matchPushT: /* *ep is a tuple of arity n, 
 			    push ptr to first element */
-	    if (!is_tuple(*ep))
+	    if (!is_tuple_rel(*ep,base))
 		FAIL();
-	    tp = tuple_val(*ep);
+	    tp = tuple_val_rel(*ep,base);
 	    n = *pc++;
 	    if (arityval(*tp) != n)
 		FAIL();
@@ -1762,12 +1842,12 @@ restart:
 	case matchList:
 	    if (!is_list(*ep))
 		FAIL();
-	    ep = list_val(*ep);
+	    ep = list_val_rel(*ep,base);
 	    break;
 	case matchPushL:
 	    if (!is_list(*ep))
 		FAIL();
-	    *sp++ = list_val(*ep);
+	    *sp++ = list_val_rel(*ep,base);
 	    ++ep;
 	    break;
 	case matchPop:
@@ -1775,41 +1855,44 @@ restart:
 	    break;
 	case matchBind:
 	    n = *pc++;
-	    hp[n] = *ep++;
+	    variables[n].term = *ep++;
 	    break;
 	case matchCmp:
 	    n = *pc++;
-	    if (!eq(hp[n],*ep))
+	    if (!eq_rel(variables[n].term, base, *ep, base))
 		FAIL();
 	    ++ep;
 	    break;
 	case matchEqBin:
 	    t = (Eterm) *pc++;
-	    if (!eq(*ep,t))
+	    if (!eq_rel(t,NULL,*ep,base))
 		FAIL();
 	    ++ep;
 	    break;
 	case matchEqFloat:
-	    if (!is_float(*ep))
+	    if (!is_float_rel(*ep,base))
 		FAIL();
-	    if (memcmp(float_val(*ep) + 1, pc, sizeof(double)))
+	    if (memcmp(float_val_rel(*ep,base) + 1, pc, sizeof(double)))
 		FAIL();
 	    pc += TermWords(2);
 	    ++ep;
 	    break;
-	case matchEqRef:
-	    if (!is_ref(*ep))
+	case matchEqRef: {
+	    Eterm* epc = (Eterm*)pc;
+	    if (!is_ref_rel(*ep,base))
 		FAIL();
-	    if (!eq(*ep, make_internal_ref((Uint *) pc)))
+	    if (!eq_rel(make_internal_ref_rel(epc, epc), epc, *ep, base)) {
 		FAIL();
-	    i = thing_arityval(*((Uint *) pc));
+	    }
+	    i = thing_arityval(*epc);
 	    pc += TermWords(i+1);
 	    ++ep;
 	    break;
+	}
 	case matchEqBig:
-	    if (!is_big(*ep))
+	    if (!is_big_rel(*ep,base))
 		FAIL();
-	    tp = big_val(*ep);
+	    tp = big_val_rel(*ep,base);
 	    {
 		Eterm *epc = (Eterm *) pc;
 		if (*tp != *epc)
@@ -1825,7 +1908,8 @@ restart:
 	    ++ep;
 	    break;
 	case matchEq:
-	    t = (Eterm) *pc++; 
+	    t = (Eterm) *pc++;
+	    ASSERT(is_immed(t));
 	    if (t != *ep++)
 		FAIL();
 	    break;
@@ -1833,25 +1917,32 @@ restart:
 	    ++ep;
 	    break;
 	/* 
-	 * Here comes guard instructions 
+	 * Here comes guard & body instructions
 	 */
 	case matchPushC: /* Push constant */
-	    *esp++ = *pc++;
+	    if ((in_flags & ERTS_PAM_COPY_RESULT)
+		&& do_catch && !is_immed(*pc)) {
+		*esp++ = copy_object(*pc++, c_p);
+	    }
+	    else {
+		*esp++ = *pc++;
+	    }
 	    break;
 	case matchConsA:
-	    ehp[1] = *--esp;
-	    ehp[0] = esp[-1];
+	    ehp = HAllocX(build_proc, 2, HEAP_XTRA);
+	    CDR(ehp) = *--esp;
+	    CAR(ehp) = esp[-1];
 	    esp[-1] = make_list(ehp);
-	    ehp += 2;
 	    break;
 	case matchConsB:
-	    ehp[0] = *--esp;
-	    ehp[1] = esp[-1];
+	    ehp = HAllocX(build_proc, 2, HEAP_XTRA);
+	    CAR(ehp) = *--esp;
+	    CDR(ehp) = esp[-1];
 	    esp[-1] = make_list(ehp);
-	    ehp += 2;
 	    break;
 	case matchMkTuple:
 	    n = *pc++;
+	    ehp = HAllocX(build_proc, n+1, HEAP_XTRA);
 	    t = make_tuple(ehp);
 	    *ehp++ = make_arityval(n);
 	    while (n--) {
@@ -1861,7 +1952,7 @@ restart:
 	    break;
 	case matchCall0:
 	    bif = (Eterm (*)(Process*, ...)) *pc++;
-	    t = (*bif)(psp);
+	    t = (*bif)(build_proc);
 	    if (is_non_value(t)) {
 		if (do_catch)
 		    t = FAIL_TERM;
@@ -1872,7 +1963,7 @@ restart:
 	    break;
 	case matchCall1:
 	    bif = (Eterm (*)(Process*, ...)) *pc++;
-	    t = (*bif)(psp, esp[-1]);
+	    t = (*bif)(build_proc, esp[-1]);
 	    if (is_non_value(t)) {
 		if (do_catch)
 		    t = FAIL_TERM;
@@ -1883,7 +1974,7 @@ restart:
 	    break;
 	case matchCall2:
 	    bif = (Eterm (*)(Process*, ...)) *pc++;
-	    t = (*bif)(psp, esp[-1], esp[-2]);
+	    t = (*bif)(build_proc, esp[-1], esp[-2]);
 	    if (is_non_value(t)) {
 		if (do_catch)
 		    t = FAIL_TERM;
@@ -1895,7 +1986,7 @@ restart:
 	    break;
 	case matchCall3:
 	    bif = (Eterm (*)(Process*, ...)) *pc++;
-	    t = (*bif)(psp, esp[-1], esp[-2], esp[-3]);
+	    t = (*bif)(build_proc, esp[-1], esp[-2], esp[-3]);
 	    if (is_non_value(t)) {
 		if (do_catch)
 		    t = FAIL_TERM;
@@ -1905,15 +1996,73 @@ restart:
 	    esp -= 2;
 	    esp[-1] = t;
 	    break;
+
+	#if HALFWORD_HEAP
+	case matchPushVGuard:
+	    if (!base) goto case_matchPushV;
+	    /* Build NULL-based copy on pseudo heap for easy disposal */
+	    n = *pc++;
+	    ASSERT(is_value(variables[n].term));
+	    ASSERT(!variables[n].proc);
+	    variables[n].term = copy_object_rel(psp, variables[n].term, base);
+	    *esp++ = variables[n].term;
+	    #ifdef DEBUG
+	    variables[n].proc = psp;
+	    variables[n].base = NULL;
+	    #endif
+	    break;
+	#endif
+	case matchPushVResult:
+	    if (!(in_flags & ERTS_PAM_COPY_RESULT)) goto case_matchPushV;
+
+	    /* Build (NULL-based) copy on callers heap */
+	#if HALFWORD_HEAP
+	    if (!do_catch && !c_p_checkpoint.p) {
+		heap_checkpoint_init(c_p, &c_p_checkpoint);
+	    }
+        #endif
+	    n = *pc++;
+	    ASSERT(is_value(variables[n].term));
+	    ASSERT(!variables[n].proc);
+	    variables[n].term = copy_object_rel(c_p, variables[n].term, base);
+	    *esp++ = variables[n].term;
+	    #ifdef DEBUG
+	    variables[n].proc = c_p;
+	    variables[n].base = NULL;
+	    #endif
+	    break;
 	case matchPushV:
-	    *esp++ = hp[*pc++];
+	case_matchPushV:
+	    n = *pc++;
+	    ASSERT(is_value(variables[n].term));
+	    ASSERT(!variables[n].base);
+	    *esp++ = variables[n].term;
 	    break;
 	case matchPushExpr:
-	    *esp++ = term;
+	    if (in_flags & ERTS_PAM_COPY_RESULT) {
+		Uint sz;
+		Eterm* top;
+		sz = size_object_rel(term, base);
+		top = HAllocX(build_proc, sz, HEAP_XTRA);
+		if (in_flags & ERTS_PAM_CONTIGUOUS_TUPLE) {
+		    ASSERT(is_tuple_rel(term,base));
+		    *esp++ = copy_shallow_rel(tuple_val_rel(term,base), sz,
+					      &top, &MSO(build_proc), base);
+		}
+		else {
+		    *esp++ = copy_struct_rel(term, sz, &top, &MSO(build_proc),
+					     base, NULL);
+		}
+	    }
+	    else {
+		*esp = term;
+	    }
 	    break;
 	case matchPushArrayAsList:
+	    ASSERT_HALFWORD(base == NULL);
 	    n = arity; /* Only happens when 'term' is an array */
 	    tp = termp;
+	    ehp = HAllocX(build_proc, n*2, HEAP_XTRA);
 	    *esp++  = make_list(ehp);
 	    while (n--) {
 		*ehp++ = *tp++;
@@ -1926,7 +2075,8 @@ restart:
 	    break;
 	case matchPushArrayAsListU:
 	    /* This instruction is NOT efficient. */
-	    *esp++  = dpm_array_to_list(psp, termp, arity);
+	    ASSERT_HALFWORD(base == NULL);
+	    *esp++  = dpm_array_to_list(build_proc, termp, arity);
 	    break;
 	case matchTrue:
 	    if (*--esp != am_true)
@@ -2012,7 +2162,7 @@ restart:
 	case matchProcessDump: {
 	    erts_dsprintf_buf_t *dsbufp = erts_create_tmp_dsbuf(0);
 	    print_process_info(ERTS_PRINT_DSBUF, (void *) dsbufp, c_p);
-	    *esp++ = new_binary(psp, (byte *)dsbufp->str, (int)dsbufp->str_len);
+	    *esp++ = new_binary(build_proc, (byte *)dsbufp->str, (int)dsbufp->str_len);
 	    erts_destroy_tmp_dsbuf(dsbufp);
 	    break;
 	}
@@ -2056,29 +2206,24 @@ restart:
 	    if (SEQ_TRACE_TOKEN(c_p) == NIL) 
 		*esp++ = NIL;
 	    else {
+		Eterm sender = SEQ_TRACE_TOKEN_SENDER(c_p);
+		Uint sender_sz = is_immed(sender) ? 0 : size_object(sender);
+		ehp = HAllocX(build_proc, 6 + sender_sz, HEAP_XTRA);
+		if (sender_sz) {
+		    sender = copy_struct(sender, sender_sz, &ehp, &MSO(build_proc));
+		}
  		*esp++ = make_tuple(ehp);
  		ehp[0] = make_arityval(5);
  		ehp[1] = SEQ_TRACE_TOKEN_FLAGS(c_p);
  		ehp[2] = SEQ_TRACE_TOKEN_LABEL(c_p);
  		ehp[3] = SEQ_TRACE_TOKEN_SERIAL(c_p);
- 		ehp[4] = SEQ_TRACE_TOKEN_SENDER(c_p);
+		ehp[4] = sender;
  		ehp[5] = SEQ_TRACE_TOKEN_LASTCNT(c_p);
 		ASSERT(SEQ_TRACE_TOKEN_ARITY(c_p) == 5);
 		ASSERT(is_immed(ehp[1]));
 		ASSERT(is_immed(ehp[2]));
 		ASSERT(is_immed(ehp[3]));
 		ASSERT(is_immed(ehp[5]));
-		if(!is_immed(ehp[4])) {
-		    Eterm *sender = &ehp[4];
-		    ehp += 6;
-		    *sender = copy_struct(*sender,
-					  size_object(*sender),
-					  &ehp,
-					  &MSO(psp));
-		}
-		else
-		    ehp += 6;
-
 	    } 
 	    break;
 	case matchEnableTrace:
@@ -2127,12 +2272,12 @@ restart:
 	    if (!(c_p->cp) || !(cp = find_function_from_pc(c_p->cp))) {
  		*esp++ = am_undefined;
  	    } else {
+		ehp = HAllocX(build_proc, 4, HEAP_XTRA);
  		*esp++ = make_tuple(ehp);
 		ehp[0] = make_arityval(3);
 		ehp[1] = cp[0];
 		ehp[2] = cp[1];
 		ehp[3] = make_small((Uint) cp[2]);
-		ehp += 4;
 	    }
 	    break;
 	case matchSilent:
@@ -2209,8 +2354,12 @@ restart:
 		}
 	    }
 	    break;
-	case matchCatch:
+	case matchCatch:  /* Match success, now build result */
 	    do_catch = 1;
+	    if (in_flags & ERTS_PAM_COPY_RESULT) {
+		build_proc = c_p;
+		esdp->current_process = c_p;
+	    }
 	    break;
 	case matchHalt:
 	    goto success;
@@ -2219,9 +2368,16 @@ restart:
 	}
     }
 fail:
+#if HALFWORD_HEAP
+    if (c_p_checkpoint.p) {
+	/* Dispose garbage built by guards on caller heap */
+	heap_checkpoint_revert(&c_p_checkpoint);
+	c_p_checkpoint.p = NULL;
+    }
+#endif
     *return_flags = 0U;
-    if (fail_label >= 0) { /* We failed during a "TryMeElse", 
-			      lets restart, with the next match 
+    if (fail_label >= 0) { /* We failed during a "TryMeElse",
+			      lets restart, with the next match
 			      program */
 	pc = (prog->text) + fail_label;
 	cleanup_match_pseudo_process(mpsp, 1);
@@ -2235,11 +2391,6 @@ success:
 	erl_exit(1, "Heap fence overwritten in db_prog_match after op "
 		 "0x%08x, overwritten with 0x%08x.", save_op, *heap_fence);
     }
-    if (*eheap_fence != FENCE_PATTERN) {
-	erl_exit(1, "Eheap fence overwritten in db_prog_match after op "
-		 "0x%08x, overwritten with 0x%08x.", save_op, 
-		 *eheap_fence);
-    }
     if (*stack_fence != FENCE_PATTERN) {
 	erl_exit(1, "Stack fence overwritten in db_prog_match after op "
 		 "0x%08x, overwritten with 0x%08x.", save_op, 
@@ -2250,6 +2401,7 @@ success:
     esdp->current_process = current_scheduled;
 
     END_ATOMIC_TRACE(c_p);
+
     return ret;
 #undef FAIL
 #undef FAIL_TERM
@@ -2261,7 +2413,8 @@ success:
 /*
  * Convert a match program to a "magic" binary to return up to erlang
  */
-Eterm db_make_mp_binary(Process *p, Binary *mp, Eterm **hpp) {
+Eterm db_make_mp_binary(Process *p, Binary *mp, Eterm **hpp)
+{
     return erts_mk_magic_binary_term(hpp, &MSO(p), mp);
 }
 
@@ -2327,13 +2480,13 @@ void db_free_dmc_err_info(DMCErrInfo *ei){
 ** Store bignum in *hpp and increase *hpp accordingly.
 ** *hpp is assumed to be large enough to hold the result.
 */
-Eterm db_add_counter(Eterm** hpp, Eterm counter, Eterm incr)
+Eterm db_add_counter(Eterm** hpp, Wterm counter, Eterm incr)
 {
     DeclareTmpHeapNoproc(big_tmp,2);
     Eterm res;
     Sint ires;
-    Eterm arg1;
-    Eterm arg2;
+    Wterm arg1;
+    Wterm arg2;
 
     if (is_both_small(counter,incr)) {
 	ires = signed_val(counter) + signed_val(incr);
@@ -2374,6 +2527,34 @@ Eterm db_add_counter(Eterm** hpp, Eterm counter, Eterm incr)
     }
 }
 
+/* Must be called to read elements after db_lookup_dbterm.
+** Will decompress if needed.
+** HEALFWORD_HEAP:
+** 	Will convert from relative to Wterm format if needed.
+**      (but only on top level, tuples and lists will still contain rterms)
+*/
+Wterm db_do_read_element(DbUpdateHandle* handle, Sint position)
+{
+    Eterm elem = handle->dbterm->tpl[position];
+    if (!is_header(elem)) {
+#if HALFWORD_HEAP
+	if (!is_immed(elem)
+	    && !handle->tb->common.compress
+	    && !(handle->abs_vec && handle->abs_vec[position])) {
+	    return rterm2wterm(elem, handle->dbterm->tpl);
+	}
+#endif
+	return elem;
+    }
+
+    ASSERT(((DbTableCommon*)handle->tb)->compress);
+    ASSERT(!handle->mustResize);
+    handle->dbterm = db_alloc_tmp_uncompressed(&handle->tb->common,
+					       handle->dbterm);
+    handle->mustResize = 1;
+    return handle->dbterm->tpl[position];
+}
+
 /*
 ** Update one element:
 ** handle:   Initialized by db_lookup_dbterm()
@@ -2390,14 +2571,17 @@ void db_do_update_element(DbUpdateHandle* handle,
     Eterm* oldp;
     Uint newval_sz;
     Uint oldval_sz;
+#if HALFWORD_HEAP
+    Eterm* old_base;
+#endif
 
     if (is_both_immed(newval,oldval)) {
 	handle->dbterm->tpl[position] = newval;
-#ifdef DEBUG_CLONE
+    #ifdef DEBUG_CLONE
 	if (handle->dbterm->debug_clone) {
 	    handle->dbterm->debug_clone[position] = newval;
 	}
-#endif
+    #endif
 	return;
     }
     if (!handle->mustResize) {
@@ -2406,49 +2590,78 @@ void db_do_update_element(DbUpdateHandle* handle,
 						       handle->dbterm);
 	    handle->mustResize = 1;
 	    oldval = handle->dbterm->tpl[position];
+        #if HALFWORD_HEAP
+	    old_base = NULL;
+	#endif
 	}
-	else if (is_boxed(newval)) {
-	    newp = boxed_val(newval);
-	    switch (*newp & _TAG_HEADER_MASK) {
-	    case _TAG_HEADER_POS_BIG:
-	    case _TAG_HEADER_NEG_BIG:
-	    case _TAG_HEADER_FLOAT:
-	    case _TAG_HEADER_HEAP_BIN:
-		newval_sz = header_arity(*newp) + 1;
-		if (is_boxed(oldval)) {
-		    oldp = boxed_val(oldval);
-		    switch (*oldp & _TAG_HEADER_MASK) {
-		    case _TAG_HEADER_POS_BIG:
-		    case _TAG_HEADER_NEG_BIG:
-		    case _TAG_HEADER_FLOAT:
-		    case _TAG_HEADER_HEAP_BIN:
-			oldval_sz = header_arity(*oldp) + 1;
-			if (oldval_sz == newval_sz) {
-			    /* "self contained" terms of same size, do memcpy */
-				sys_memcpy(oldp, newp, newval_sz*sizeof(Eterm));
-			    return;
+	else {
+	#if HALFWORD_HEAP
+	    ASSERT(!handle->abs_vec);
+	    old_base = handle->dbterm->tpl;
+	#endif
+	    if (is_boxed(newval)) {
+		newp = boxed_val(newval);
+		switch (*newp & _TAG_HEADER_MASK) {
+		case _TAG_HEADER_POS_BIG:
+		case _TAG_HEADER_NEG_BIG:
+		case _TAG_HEADER_FLOAT:
+		case _TAG_HEADER_HEAP_BIN:
+		    newval_sz = header_arity(*newp) + 1;
+		    if (is_boxed(oldval)) {
+			oldp = boxed_val_rel(oldval,old_base);
+			switch (*oldp & _TAG_HEADER_MASK) {
+			case _TAG_HEADER_POS_BIG:
+			case _TAG_HEADER_NEG_BIG:
+			case _TAG_HEADER_FLOAT:
+			case _TAG_HEADER_HEAP_BIN:
+			    oldval_sz = header_arity(*oldp) + 1;
+			    if (oldval_sz == newval_sz) {
+				/* "self contained" terms of same size, do memcpy */
+				    sys_memcpy(oldp, newp, newval_sz*sizeof(Eterm));
+				return;
+			    }
+			    goto both_size_set;
 			}
-			goto both_size_set;
 		    }
+		    goto new_size_set;
 		}
-		goto new_size_set;
 	    }
 	}
     }
+#if HALFWORD_HEAP
+    else {
+	old_base = (handle->tb->common.compress
+		    || (handle->abs_vec && handle->abs_vec[position])) ?
+	    NULL : handle->dbterm->tpl;
+    }
+#endif
     /* Not possible for simple memcpy or dbterm is already non-contiguous, */
     /* need to realloc... */
 
     newval_sz = is_immed(newval) ? 0 : size_object(newval);
 new_size_set:
-	
-    oldval_sz = is_immed(oldval) ? 0 : size_object(oldval);
+
+    oldval_sz = is_immed(oldval) ? 0 : size_object_rel(oldval,old_base);
 both_size_set:
 
     handle->new_size = handle->new_size - oldval_sz + newval_sz;
 
-    /* write new value in old dbterm, finalize will make a flat copy */	
+    /* write new value in old dbterm, finalize will make a flat copy */
     handle->dbterm->tpl[position] = newval;
     handle->mustResize = 1;
+
+#if HALFWORD_HEAP
+    if (old_base && newval_sz > 0) {
+	ASSERT(!handle->tb->common.compress);
+	if (!handle->abs_vec) {
+	    int i = header_arity(handle->dbterm->tpl[0]);
+	    handle->abs_vec = erts_alloc(ERTS_ALC_T_TMP, (i+1)*sizeof(char));
+	    sys_memset(handle->abs_vec, 0, i+1);
+	    /* abs_vec[0] not used */
+	}
+	handle->abs_vec[position] = 1;
+    }
+#endif
 }
 
 static ERTS_INLINE byte* db_realloc_term(DbTableCommon* tb, void* old,
@@ -2547,7 +2760,7 @@ static void* copy_to_comp(DbTableCommon* tb, Eterm obj, DbTerm* dest,
     tpl[arity + 1] = alloc_size;
 
     tmp_offheap.first = NULL;
-    tpl[tb->keypos] = copy_struct(key, size_object(key), &top.ep, &tmp_offheap);
+    tpl[tb->keypos] = copy_struct_rel(key, size_object(key), &top.ep, &tmp_offheap, NULL, tpl);
     dest->first_oh = tmp_offheap.first;
     for (i=1; i<=arity; i++) {
 	if (i != tb->keypos) {
@@ -2566,7 +2779,7 @@ static void* copy_to_comp(DbTableCommon* tb, Eterm obj, DbTerm* dest,
 	Eterm* dbg_top = erts_alloc(ERTS_ALC_T_DB_TERM, dest->size * sizeof(Eterm));
 	dest->debug_clone = dbg_top;
 	tmp_offheap.first = dest->first_oh;
-	copy_struct(obj, dest->size, &dbg_top, &tmp_offheap);
+	copy_struct_rel(obj, dest->size, &dbg_top, &tmp_offheap, NULL, dbg_top);
 	dest->first_oh = tmp_offheap.first;
 	ASSERT(dbg_top == dest->debug_clone + dest->size);
     }
@@ -2613,7 +2826,7 @@ void* db_store_term(DbTableCommon *tb, DbTerm* old, Uint offset, Eterm obj)
     newp->size = size;
     top = newp->tpl;
     tmp_offheap.first  = NULL;
-    copy_struct(obj, size, &top, &tmp_offheap);
+    copy_struct_rel(obj, size, &top, &tmp_offheap, NULL, top);
     newp->first_oh = tmp_offheap.first;
 #ifdef DEBUG_CLONE
     newp->debug_clone = NULL;
@@ -2652,7 +2865,7 @@ void* db_store_term_comp(DbTableCommon *tb, DbTerm* old, Uint offset, Eterm obj)
     top = copy_to_comp(tb, obj, newp, new_sz);
     ASSERT(top <= basep + new_sz);
 
-    // SVERK: realloc?
+    /* ToDo: Maybe realloc if ((basep+new_sz) - top) > WASTED_SPACE_LIMIT */
 
     return basep;
 }
@@ -2673,6 +2886,9 @@ void db_finalize_resize(DbUpdateHandle* handle, Uint offset)
     *(handle->bp) = newp;
     newDbTerm = (DbTerm*) (newp + offset);
     newDbTerm->size = handle->new_size;
+#ifdef DEBUG_CLONE
+    newDbTerm->debug_clone = NULL;
+#endif
 
     /* make a flat copy */
 
@@ -2682,17 +2898,38 @@ void db_finalize_resize(DbUpdateHandle* handle, Uint offset)
 	db_free_tmp_uncompressed(handle->dbterm);
     }
     else {
-	Eterm* top;
 	ErlOffHeap tmp_offheap;
+	Eterm* tpl = handle->dbterm->tpl;
+	Eterm* top = newDbTerm->tpl;
+
 	tmp_offheap.first = NULL;
-	top = newDbTerm->tpl;
-	copy_struct(make_tuple(handle->dbterm->tpl), handle->new_size,
-		    &top, &tmp_offheap);
-	newDbTerm->first_oh = tmp_offheap.first;
-#ifdef DEBUG_CLONE
-	newDbTerm->debug_clone = NULL;
-#endif
-	ASSERT((byte*)top <= (newp + alloc_sz));
+
+    #if HALFWORD_HEAP
+	if (handle->abs_vec) {
+	    int i, arity = header_arity(handle->dbterm->tpl[0]);
+
+	    top[0] = tpl[0];
+	    top += arity + 1;
+	    for (i=1; i<=arity; i++) {
+		Eterm* src_base = handle->abs_vec[i] ? NULL : tpl;
+
+		newDbTerm->tpl[i] = copy_struct_rel(tpl[i],
+						    size_object_rel(tpl[i],src_base),
+						    &top, &tmp_offheap, src_base,
+						    newDbTerm->tpl);
+	    }
+	    newDbTerm->first_oh = tmp_offheap.first;
+	    ASSERT((byte*)top <= (newp + alloc_sz));
+	    erts_free(ERTS_ALC_T_TMP, handle->abs_vec);
+	}
+	else
+    #endif /* HALFWORD_HEAP */
+	{
+	    copy_struct_rel(make_tuple_rel(tpl,tpl), handle->new_size, &top,
+			    &tmp_offheap, tpl, top);
+	    newDbTerm->first_oh = tmp_offheap.first;
+	    ASSERT((byte*)top == (newp + alloc_sz));
+	}
     }
 }
 
@@ -2705,9 +2942,9 @@ Eterm db_copy_from_comp(DbTableCommon* tb, DbTerm* bp, Eterm** hpp,
     hp[0] = bp->tpl[0];
     *hpp += arity + 1;
 
-    hp[tb->keypos] = copy_struct(bp->tpl[tb->keypos],
-				 size_object(bp->tpl[tb->keypos]),
-				 hpp, off_heap);
+    hp[tb->keypos] = copy_struct_rel(bp->tpl[tb->keypos],
+				     size_object_rel(bp->tpl[tb->keypos], bp->tpl),
+				     hpp, off_heap, bp->tpl, NULL);
     for (i=arity; i>0; i--) {
 	if (i != tb->keypos) {
 	    if (is_immed(bp->tpl[i])) {
@@ -2721,7 +2958,7 @@ Eterm db_copy_from_comp(DbTableCommon* tb, DbTerm* bp, Eterm** hpp,
     }
     ASSERT((*hpp - hp) <= bp->size);
 #ifdef DEBUG_CLONE
-    ASSERT(eq(make_tuple(hp),make_tuple(bp->debug_clone)));
+    ASSERT(eq_rel(make_tuple(hp),make_tuple(bp->debug_clone),bp->debug_clone));
 #endif
     return make_tuple(hp);
 }
@@ -2744,14 +2981,14 @@ Eterm db_copy_element_from_ets(DbTableCommon* tb, Process* p,
 	hp += extra;
 	HRelease(p, endp, hp);
 #ifdef DEBUG_CLONE
-	ASSERT(eq(copy,obj->debug_clone[pos]));
+	ASSERT(eq_rel(copy, obj->debug_clone[pos], obj->debug_clone));
 #endif
 	return copy;
     }
     else {
-	Uint sz = size_object(obj->tpl[pos]);
+	Uint sz = size_object_rel(obj->tpl[pos], obj->tpl);
 	*hpp = HAlloc(p, sz + extra);
-	return copy_struct(obj->tpl[pos], sz, hpp, &MSO(p));
+	return copy_struct_rel(obj->tpl[pos], sz, hpp, &MSO(p), obj->tpl, NULL);
     }
 }
 
@@ -2765,7 +3002,7 @@ void db_cleanup_offheap_comp(DbTerm* obj)
     ProcBin tmp;
 
     for (u.hdr = obj->first_oh; u.hdr; u.hdr = u.hdr->next) {
-	if ((UWord)u.voidp % sizeof(UWord) != 0) { /* unaligned ptr */
+	if ((UWord)u.voidp % sizeof(Uint) != 0) { /* unaligned ptr */
 	    sys_memcpy(&tmp, u.voidp, sizeof(tmp));
 	    /* Warning, must pass (void*)-variable to memcpy. Otherwise it will
 	       cause Bus error on Sparc due to false compile time assumptions
@@ -2961,7 +3198,7 @@ static DMCRet dmc_one_term(DMCContext *context,
 		** Ouch, big integer in match variable.
 		*/
 		Eterm *save_hp;
-		ASSERT(heap->data == heap->def);
+		ASSERT(heap->vars == heap->vars_def);
 		sz = sz2 = sz3 = 0;
 		for (j = 0; j < context->num_match; ++j) {
 		    sz += size_object(context->matchexpr[j]);
@@ -2999,24 +3236,23 @@ static DMCRet dmc_one_term(DMCContext *context,
 		       may be atoms that changed */
 		    context->matchexpr[j] = context->copy->mem[j];
 		}
-		heap->data = erts_alloc(ERTS_ALC_T_DB_MS_CMPL_HEAP,
-					heap->size*sizeof(unsigned));
-		sys_memset(heap->data, 0, 
-			   heap->size * sizeof(unsigned));
+		heap->vars = erts_alloc(ERTS_ALC_T_DB_MS_CMPL_HEAP,
+					heap->size*sizeof(DMCVariable));
+		sys_memset(heap->vars, 0, heap->size * sizeof(DMCVariable));
 		DMC_CLEAR(*stack);
 		/*DMC_PUSH(*stack,NIL);*/
 		DMC_CLEAR(*text);
 		return retRestart;
 	    }
-	    if (heap->data[n]) { /* already bound ? */
+	    if (heap->vars[n].is_bound) {
 		DMC_PUSH(*text,matchCmp);
 		DMC_PUSH(*text,n);
 	    } else { /* Not bound, bind! */
-		if (n >= heap->used)
-		    heap->used = n + 1;
+		if (n >= heap->vars_used)
+		    heap->vars_used = n + 1;
 		DMC_PUSH(*text,matchBind);
 		DMC_PUSH(*text,n);
-		heap->data[n] = 1;
+		heap->vars[n].is_bound = 1;
 	    }
 	} else if (c == am_Underscore) {
 	    DMC_PUSH(*text, matchSkip);
@@ -3041,6 +3277,8 @@ static DMCRet dmc_one_term(DMCContext *context,
 	    DMC_PUSH(*stack, c);
 	    break;
 	case (_TAG_HEADER_REF >> _TAG_PRIMARY_SIZE):
+	{
+	    Eterm* ref_val = internal_ref_val(c);
 	    DMC_PUSH(*text, matchEqRef);
 #if HALFWORD_HEAP
 	    {
@@ -3048,25 +3286,27 @@ static DMCRet dmc_one_term(DMCContext *context,
 		    UWord u;
 		    Uint t[2];
 		} fiddle;
-		ASSERT(thing_arityval(*internal_ref_val(c)) == 3);
-		fiddle.t[0] = *internal_ref_val(c);
-		fiddle.t[1] = (Uint) internal_ref_val(c)[1];
+		ASSERT(thing_arityval(ref_val[0]) == 3);
+		fiddle.t[0] = ref_val[0];
+		fiddle.t[1] = ref_val[1];
 		DMC_PUSH(*text, fiddle.u);
-		fiddle.t[0] = (Uint) internal_ref_val(c)[2];
-		fiddle.t[1] = (Uint) internal_ref_val(c)[3];
+		fiddle.t[0] = ref_val[2];
+		fiddle.t[1] = ref_val[3];
 		DMC_PUSH(*text, fiddle.u);
 	    }
 #else
-	    n = thing_arityval(*internal_ref_val(c));
-	    DMC_PUSH(*text, *internal_ref_val(c));
-	    for (i = 1; i <= n; ++i) {
-		DMC_PUSH(*text, (Uint) internal_ref_val(c)[i]);
+	    n = thing_arityval(ref_val[0]);
+	    for (i = 0; i <= n; ++i) {
+		DMC_PUSH(*text, ref_val[i]);
 	    }
 #endif
 	    break;
+	}
 	case (_TAG_HEADER_POS_BIG >> _TAG_PRIMARY_SIZE):
 	case (_TAG_HEADER_NEG_BIG >> _TAG_PRIMARY_SIZE):
-	    n = thing_arityval(*big_val(c));
+	{
+	    Eterm* bval = big_val(c);
+	    n = thing_arityval(bval[0]);
 	    DMC_PUSH(*text, matchEqBig);
 #if HALFWORD_HEAP
 	    {
@@ -3075,13 +3315,13 @@ static DMCRet dmc_one_term(DMCContext *context,
 		    Uint t[2];
 		} fiddle;
 		ASSERT(n >= 1);
-		fiddle.t[0] = *big_val(c);
-		fiddle.t[1] = big_val(c)[1];
+		fiddle.t[0] = bval[0];
+		fiddle.t[1] = bval[1];
 		DMC_PUSH(*text, fiddle.u);
 		for (i = 2; i <= n; ++i) {
-		    fiddle.t[0] = big_val(c)[i];
+		    fiddle.t[0] = bval[i];
 		    if (++i <= n) {
-			fiddle.t[1] = big_val(c)[i];
+			fiddle.t[1] = bval[i];
 		    } else {
 			fiddle.t[1] = (Uint) 0;
 		    }
@@ -3089,12 +3329,12 @@ static DMCRet dmc_one_term(DMCContext *context,
 		}
 	    }
 #else
-	    DMC_PUSH(*text, *big_val(c));
-	    for (i = 1; i <= n; ++i) {
-		DMC_PUSH(*text, (Uint) big_val(c)[i]);
+	    for (i = 0; i <= n; ++i) {
+		DMC_PUSH(*text, (Uint) bval[i]);
 	    }
 #endif
 	    break;
+	}
 	case (_TAG_HEADER_FLOAT >> _TAG_PRIMARY_SIZE):
 	    DMC_PUSH(*text,matchEqFloat);
 #if HALFWORD_HEAP
@@ -3227,7 +3467,6 @@ static DMCRet dmc_list(DMCContext *context,
 	DMC_PUSH(*text, matchConsB);
     }
     --context->stack_used; /* Two objects on stack becomes one */
-    context->eheap_need += 2;
     return retOk;
 }
 
@@ -3286,7 +3525,6 @@ static DMCRet dmc_tuple(DMCContext *context,
     DMC_PUSH(*text, matchMkTuple);
     DMC_PUSH(*text, nelems);
     context->stack_used -= (nelems - 1);
-    context->eheap_need += (nelems + 1);
     *constant = 0;
     return retOk;
 }
@@ -3304,9 +3542,6 @@ static DMCRet dmc_whole_expression(DMCContext *context,
 	} else { 
 	    ASSERT(is_tuple(context->matchexpr
 			    [context->current_match]));
-	    context->eheap_need += 
-		arityval(*(tuple_val(context->matchexpr
-				     [context->current_match]))) * 2;
 	    DMC_PUSH(*text, matchPushArrayAsList);
 	}
     } else {
@@ -3319,6 +3554,41 @@ static DMCRet dmc_whole_expression(DMCContext *context,
     return retOk;
 }
 
+/* Figure out which PushV instruction to use.
+*/
+static void dmc_add_pushv_variant(DMCContext *context, DMCHeap *heap,
+				  DMC_STACK_TYPE(UWord) *text, Uint n)
+{
+    DMCVariable* v = &heap->vars[n];
+    MatchOps instr = matchPushV;
+
+    ASSERT(n < heap->vars_used && v->is_bound);
+    if (context->is_guard) {
+	#if HALFWORD_HEAP
+	if (!v->first_guard_label) {
+	    v->first_guard_label = DMC_STACK_NUM(*text);
+	    ASSERT(v->first_guard_label);
+	    instr = matchPushVGuard; /* may be changed to PushVResult below */
+	}
+	#endif
+    }
+    else { /* body */
+	#if HALFWORD_HEAP
+	if (v->first_guard_label) {
+	    /* Avoid double-copy, copy to result heap at first encounter in guard */
+	    DMC_POKE(*text, v->first_guard_label, matchPushVResult);
+	    v->is_in_body = 1;
+	}
+	#endif
+	if (!v->is_in_body) {
+	    instr = matchPushVResult;
+	    v->is_in_body = 1;
+	}
+    }
+    DMC_PUSH(*text, instr);
+    DMC_PUSH(*text, n);
+}
+
 static DMCRet dmc_variable(DMCContext *context,
 			   DMCHeap *heap,
 			   DMC_STACK_TYPE(UWord) *text,
@@ -3326,13 +3596,13 @@ static DMCRet dmc_variable(DMCContext *context,
 			   int *constant)
 {
     Uint n = db_is_variable(t);
-    ASSERT(n >= 0);
-    if (n >= heap->used) 
-	RETURN_VAR_ERROR("Variable $%d is unbound.", n, context, *constant);
-    if (heap->data[n] == 0U)
+
+    if (n >= heap->vars_used || !heap->vars[n].is_bound) {
 	RETURN_VAR_ERROR("Variable $%d is unbound.", n, context, *constant);
-    DMC_PUSH(*text, matchPushV);
-    DMC_PUSH(*text, n);
+    }
+
+    dmc_add_pushv_variant(context, heap, text, n);
+
     ++context->stack_used;
     if (context->stack_used > context->stack_need)
 	context->stack_need = context->stack_used;
@@ -3351,10 +3621,9 @@ static DMCRet dmc_all_bindings(DMCContext *context,
 
     DMC_PUSH(*text, matchPushC);
     DMC_PUSH(*text, NIL);
-    for (i = heap->used - 1; i >= 0; --i) { 
-	if (heap->data[i]) {
-	    DMC_PUSH(*text, matchPushV);
-	    DMC_PUSH(*text, i);
+    for (i = heap->vars_used - 1; i >= 0; --i) {
+	if (heap->vars[i].is_bound) {
+	    dmc_add_pushv_variant(context, heap, text, i);
 	    DMC_PUSH(*text, matchConsB);
 	    heap_used += 2;
 	}
@@ -3362,7 +3631,6 @@ static DMCRet dmc_all_bindings(DMCContext *context,
     ++context->stack_used;
     if ((context->stack_used + 1) > context->stack_need)
 	context->stack_need = (context->stack_used + 1);
-    context->eheap_need += heap_used;
     *constant = 0;
     return retOk;
 }
@@ -3765,10 +4033,6 @@ static DMCRet dmc_get_seq_token(DMCContext *context,
 
     *constant = 0;
     DMC_PUSH(*text, matchGetSeqToken);
-    context->eheap_need += (6 /* A 5-tuple is built */
-			    + EXTERNAL_THING_HEAD_SIZE + 2 /* Sender can
-							      be an external
-							      pid */);
     if (++context->stack_used > context->stack_need)
  	context->stack_need = context->stack_used;
     return retOk;
@@ -4065,7 +4329,6 @@ static DMCRet dmc_caller(DMCContext *context,
     }
     *constant = 0;
     DMC_PUSH(*text, matchCaller); /* Creates binary */
-    context->eheap_need += 4;     /* A 3-tuple is built */
     if (++context->stack_used > context->stack_need)
  	context->stack_need = context->stack_used;
     return retOk;
@@ -4663,7 +4926,8 @@ static Eterm match_spec_test(Process *p, Eterm against, Eterm spec, int trace)
 	    }
 	    save_cp = p->cp;
 	    p->cp = NULL;
-	    res = erts_match_set_run(p, mps, arr, n, &ret_flags);
+	    res = erts_match_set_run(p, mps, arr, n,
+				     ERTS_PAM_COPY_RESULT, &ret_flags);
 	    p->cp = save_cp;
 	} else {
 	    n = 0;
@@ -4676,11 +4940,10 @@ static Eterm match_spec_test(Process *p, Eterm against, Eterm spec, int trace)
 	if (is_non_value(res)) {
 	    res = am_false;
 	}
-	sz = size_object(res);
+	sz = 0;
 	if (ret_flags & MATCH_SET_EXCEPTION_TRACE) sz += 2;
 	if (ret_flags & MATCH_SET_RETURN_TRACE) sz += 2;
 	hp = HAlloc(p, 5 + sz);
-	res = copy_struct(res, sz, &hp, &MSO(p));
 	flg = NIL;
 	if (ret_flags & MATCH_SET_EXCEPTION_TRACE) {
 	    flg = CONS(hp, am_exception_trace, flg);
@@ -4735,28 +4998,24 @@ void db_free_tmp_uncompressed(DbTerm* obj)
     erts_free(ERTS_ALC_T_TMP, obj);
 }
 
-Eterm db_prog_match_and_copy(DbTableCommon* tb, Process* c_p, Binary* bprog,
+Eterm db_match_dbterm(DbTableCommon* tb, Process* c_p, Binary* bprog,
 			     int all, DbTerm* obj, Eterm** hpp, Uint extra)
 {
     Uint32 dummy;
+    Eterm* base;
     Eterm res;
 
     if (tb->compress) {
 	obj = db_alloc_tmp_uncompressed(tb, obj);
+	base = NULL;
     }
+    else base = HALFWORD_HEAP ? obj->tpl : NULL;
 
-    res = db_prog_match(c_p, bprog, make_tuple(obj->tpl), NULL, 0, &dummy);
+    res = db_prog_match(c_p, bprog, make_tuple_rel(obj->tpl,base), base, NULL, 0,
+			ERTS_PAM_COPY_RESULT|ERTS_PAM_CONTIGUOUS_TUPLE, &dummy);
 
     if (is_value(res) && hpp!=NULL) {
-	if (all) {
-	    *hpp = HAlloc(c_p, obj->size + extra);
-	    res = copy_shallow(obj->tpl, obj->size, hpp, &MSO(c_p));
-	}
-	else {
-	    Uint sz = size_object(res);
-	    *hpp = HAlloc(c_p, sz + extra);
-	    res = copy_struct(res, sz, hpp, &MSO(c_p));
-	}
+	*hpp = HAlloc(c_p, extra);
     }
 
     if (tb->compress) {
@@ -4767,10 +5026,11 @@ Eterm db_prog_match_and_copy(DbTableCommon* tb, Process* c_p, Binary* bprog,
 
 
 #ifdef DMC_DEBUG
+
 /*
 ** Disassemble match program
 */
-static void db_match_dis(Binary *bp)
+void db_match_dis(Binary *bp)
 {
     MatchProg *prog = Binary2MatchProg(bp);
     UWord *t = prog->text;
@@ -4985,6 +5245,18 @@ static void db_match_dis(Binary *bp)
 	    ++t;
 	    erts_printf("PushV\t%bpu\n", n);
 	    break;
+    #if HALFWORD_HEAP
+	case matchPushVGuard:
+	    n = (Uint) *++t;
+	    ++t;
+	    erts_printf("PushVGuard\t%bpu\n", n);
+	    break;
+    #endif
+	case matchPushVResult:
+	    n = (Uint) *++t;
+	    ++t;
+	    erts_printf("PushVResult\t%bpu\n", n);
+	    break;
 	case matchTrue:
 	    ++t;
 	    erts_printf("True\n");
@@ -5095,7 +5367,6 @@ static void db_match_dis(Binary *bp)
     erts_printf("}\n");
     erts_printf("num_bindings: %d\n", prog->num_bindings);
     erts_printf("heap_size: %bpu\n", prog->heap_size);
-    erts_printf("eheap_offset: %bpu\n", prog->eheap_offset);
     erts_printf("stack_offset: %bpu\n", prog->stack_offset);
     erts_printf("text: 0x%08x\n", (unsigned long) prog->text);
     erts_printf("stack_size: %d (words)\n", prog->heap_size-prog->stack_offset);
diff --git a/erts/emulator/beam/erl_db_util.h b/erts/emulator/beam/erl_db_util.h
index 10ba755e80..bb1751d309 100644
--- a/erts/emulator/beam/erl_db_util.h
+++ b/erts/emulator/beam/erl_db_util.h
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1998-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1998-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -86,6 +86,9 @@ typedef struct {
     Uint new_size;
     int mustResize;
     void* lck;
+#if HALFWORD_HEAP
+    unsigned char* abs_vec;  /* [i] true if dbterm->tpl[i] is absolute Eterm */
+#endif
 } DbUpdateHandle;
 
 
@@ -206,8 +209,7 @@ typedef struct db_fixation {
  */
 
 typedef struct db_table_common {
-    erts_refc_t ref;
-    erts_refc_t fixref;       /* fixation counter */
+    erts_refc_t ref;          /* fixation counter and delete counter */
 #ifdef ERTS_SMP
     erts_smp_rwmtx_t rwlock;  /* rw lock on table */
     erts_smp_mtx_t fixlock;   /* Protects fixations,megasec,sec,microsec */
@@ -253,10 +255,17 @@ typedef struct db_table_common {
 				  (DB_BAG | DB_SET | DB_DUPLICATE_BAG)))
 #define IS_TREE_TABLE(Status) (!!((Status) & \
 				  DB_ORDERED_SET))
-#define NFIXED(T) (erts_refc_read(&(T)->common.fixref,0))
+#define NFIXED(T) (erts_refc_read(&(T)->common.ref,0))
 #define IS_FIXED(T) (NFIXED(T) != 0) 
 
-Eterm erts_ets_copy_object(Eterm, Process*);
+/*
+ * tplp is an untagged pointer to a tuple we know is large enough
+ * and dth is a pointer to a DbTableHash.
+ */
+#define GETKEY(dth, tplp)   (*((tplp) + ((DbTableCommon*)(dth))->keypos))
+
+
+ERTS_GLB_INLINE Eterm db_copy_key(Process* p, DbTable* tb, DbTerm* obj);
 Eterm db_copy_from_comp(DbTableCommon* tb, DbTerm* bp, Eterm** hpp,
 			ErlOffHeap* off_heap);
 int db_eq_comp(DbTableCommon* tb, Eterm a, DbTerm* b);
@@ -265,9 +274,23 @@ DbTerm* db_alloc_tmp_uncompressed(DbTableCommon* tb, DbTerm* org);
 ERTS_GLB_INLINE Eterm db_copy_object_from_ets(DbTableCommon* tb, DbTerm* bp,
 					      Eterm** hpp, ErlOffHeap* off_heap);
 ERTS_GLB_INLINE int db_eq(DbTableCommon* tb, Eterm a, DbTerm* b);
-ERTS_GLB_INLINE Eterm db_do_read_element(DbUpdateHandle* handle, Sint position);
+Wterm db_do_read_element(DbUpdateHandle* handle, Sint position);
 
 #if ERTS_GLB_INLINE_INCL_FUNC_DEF
+
+ERTS_GLB_INLINE Eterm db_copy_key(Process* p, DbTable* tb, DbTerm* obj)
+{
+    Eterm key = GETKEY(tb, obj->tpl);
+    if IS_CONST(key) return key;
+    else {
+	Uint size = size_object_rel(key, obj->tpl);
+	Eterm* hp = HAlloc(p, size);
+	Eterm res = copy_struct_rel(key, size, &hp, &MSO(p), obj->tpl, NULL);
+	ASSERT(eq_rel(res,NULL,key,obj->tpl));
+	return res;
+    }
+}
+
 ERTS_GLB_INLINE Eterm db_copy_object_from_ets(DbTableCommon* tb, DbTerm* bp,
 					      Eterm** hpp, ErlOffHeap* off_heap)
 {
@@ -275,49 +298,27 @@ ERTS_GLB_INLINE Eterm db_copy_object_from_ets(DbTableCommon* tb, DbTerm* bp,
 	return db_copy_from_comp(tb, bp, hpp, off_heap);
     }
     else {
-	return copy_shallow(bp->tpl, bp->size, hpp, off_heap);
+	return copy_shallow_rel(bp->tpl, bp->size, hpp, off_heap, bp->tpl);
     }
 }
 
 ERTS_GLB_INLINE int db_eq(DbTableCommon* tb, Eterm a, DbTerm* b)
 {
     if (!tb->compress) {
-	return eq(a, make_tuple(b->tpl));
+	return eq_rel(a, NULL, make_tuple_rel(b->tpl,b->tpl), b->tpl);
     }
     else {
 	return db_eq_comp(tb, a, b);
     }
 }
 
-/* Must be called to read elements after db_lookup_dbterm.
-** Will decompress if needed. */
-ERTS_GLB_INLINE Eterm db_do_read_element(DbUpdateHandle* handle, Sint position)
-{
-    Eterm elem = handle->dbterm->tpl[position];
-    if (!is_header(elem)) {
-	return elem;
-    }
-    ASSERT(((DbTableCommon*)handle->tb)->compress);
-    ASSERT(!handle->mustResize);
-    handle->dbterm = db_alloc_tmp_uncompressed((DbTableCommon*)handle->tb, handle->dbterm);
-    handle->mustResize = 1;
-    return handle->dbterm->tpl[position];
-}
-
 #endif /* ERTS_GLB_INLINE_INCL_FUNC_DEF */
 
-/* optimised version of copy_object (normal case? atomic object) */
-#define COPY_OBJECT(obj, p, objp) \
-   if (IS_CONST(obj)) { *(objp) = (obj); } \
-   else { *objp = erts_ets_copy_object(obj, p); }
 
 #define DB_READ  (DB_PROTECTED|DB_PUBLIC)
 #define DB_WRITE DB_PUBLIC
 #define DB_INFO  (DB_PROTECTED|DB_PUBLIC|DB_PRIVATE)
 
-/* tb is an DbTableCommon and obj is an Eterm (tagged) */
-#define TERM_GETKEY(tb, obj) db_getkey((tb)->common.keypos, (obj)) 
-
 #define ONLY_WRITER(P,T) (((T)->common.status & (DB_PRIVATE|DB_PROTECTED)) \
 			  && (T)->common.owner == (P)->id)
 
@@ -338,12 +339,11 @@ Eterm db_copy_element_from_ets(DbTableCommon* tb, Process* p, DbTerm* obj,
 			       Uint pos, Eterm** hpp, Uint extra);
 int db_has_variable(Eterm obj);
 int db_is_variable(Eterm obj);
-Eterm db_do_read_element(DbUpdateHandle* handle, Sint position);
 void db_do_update_element(DbUpdateHandle* handle,
 			  Sint position,
 			  Eterm newval);
 void db_finalize_resize(DbUpdateHandle* handle, Uint offset);
-Eterm db_add_counter(Eterm** hpp, Eterm counter, Eterm incr);
+Eterm db_add_counter(Eterm** hpp, Wterm counter, Eterm incr);
 Eterm db_match_set_lint(Process *p, Eterm matchexpr, Uint flags);
 Binary *db_match_set_compile(Process *p, Eterm matchexpr, 
 			     Uint flags);
@@ -360,7 +360,6 @@ typedef struct match_prog {
     struct erl_heap_fragment *saved_program_buf;
     Eterm saved_program;
     Uint heap_size;          /* size of: heap + eheap + stack */
-    Uint eheap_offset;
     Uint stack_offset;
 #ifdef DMC_DEBUG
     UWord* prog_end;		/* End of program */
@@ -424,11 +423,16 @@ Binary *db_match_compile(Eterm *matchexpr, Eterm *guards,
 			 Eterm *body, int num_matches, 
 			 Uint flags, 
 			 DMCErrInfo *err_info);
-Eterm db_prog_match_and_copy(DbTableCommon* tb, Process* c_p, Binary* bprog,
-			     int all, DbTerm* obj, Eterm** hpp, Uint extra);
 /* Returns newly allocated MatchProg binary with refc == 0*/
-Eterm db_prog_match(Process *p, Binary *prog, Eterm term, Eterm *termp, int arity,
+
+Eterm db_match_dbterm(DbTableCommon* tb, Process* c_p, Binary* bprog,
+		      int all, DbTerm* obj, Eterm** hpp, Uint extra);
+
+Eterm db_prog_match(Process *p, Binary *prog, Eterm term, Eterm* base,
+		    Eterm *termp, int arity,
+		    enum erts_pam_run_flags in_flags,
 		    Uint32 *return_flags /* Zeroed on enter */);
+
 /* returns DB_ERROR_NONE if matches, 1 if not matches and some db error on 
    error. */
 DMCErrInfo *db_new_dmc_err_info(void);
diff --git a/erts/emulator/beam/erl_drv_thread.c b/erts/emulator/beam/erl_drv_thread.c
index 17b08a71d4..39bbe9633b 100644
--- a/erts/emulator/beam/erl_drv_thread.c
+++ b/erts/emulator/beam/erl_drv_thread.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2007-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2007-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -24,6 +24,10 @@
 #include "global.h"
 #include <string.h>
 
+#if defined(__APPLE__) && defined(__MACH__) && !defined(__DARWIN__)
+#define __DARWIN__ 1
+#endif
+
 #define ERL_DRV_THR_OPTS_SIZE(LAST_FIELD) \
   (((size_t) &((ErlDrvThreadOpts *) 0)->LAST_FIELD) \
    + sizeof(((ErlDrvThreadOpts *) 0)->LAST_FIELD))
@@ -692,3 +696,57 @@ erl_drv_thread_join(ErlDrvTid tid, void **respp)
 #endif
 }
 
+#if defined(__DARWIN__) && defined(USE_THREADS) && defined(ERTS_SMP)
+extern int erts_darwin_main_thread_pipe[2];
+extern int erts_darwin_main_thread_result_pipe[2];
+
+
+int
+erl_drv_stolen_main_thread_join(ErlDrvTid tid, void **respp)
+{
+    void *dummy;
+    void **x;
+    if (respp == NULL)
+	x = &dummy;
+    else
+	x = respp;
+    read(erts_darwin_main_thread_result_pipe[0],x,sizeof(void *));
+    return 0;
+}
+
+int
+erl_drv_steal_main_thread(char *name,
+			  ErlDrvTid *tid,
+			  void* (*func)(void*),
+			  void* arg,
+			  ErlDrvThreadOpts *opts)
+{
+    char buff[sizeof(void* (*)(void*)) + sizeof(void *)];
+    int buff_sz = sizeof(void* (*)(void*)) + sizeof(void *);
+    /*struct ErlDrvTid_ *dtid;
+
+    dtid = erts_alloc_fnf(ERTS_ALC_T_DRV_TID,
+			  (sizeof(struct ErlDrvTid_)
+			   + (name ? sys_strlen(name) + 1 : 0)));
+    if (!dtid)
+	return ENOMEM;
+    memset(dtid,0,sizeof(ErlDrvTid_));
+    dtid->tid = (void * ) -1;
+    dtid->drv_thr = 1;
+    dtid->func = func;
+    dtid->arg = arg;
+    dtid->tsd = NULL;
+    dtid->tsd_len = 0;
+    dtid->name = no_name;
+    *tid = (ErlDrvTid) dtid;
+    */
+    *tid = NULL;
+    /* Ignore options and name... */
+    
+    memcpy(buff,&func,sizeof(void* (*)(void*)));
+    memcpy(buff + sizeof(void* (*)(void*)),&arg,sizeof(void *));
+    write(erts_darwin_main_thread_pipe[1],buff,buff_sz);
+    return 0;
+}
+
+#endif
diff --git a/erts/emulator/beam/erl_init.c b/erts/emulator/beam/erl_init.c
index f4e0717d30..0a57eb6d88 100644
--- a/erts/emulator/beam/erl_init.c
+++ b/erts/emulator/beam/erl_init.c
@@ -250,7 +250,7 @@ erl_init(int ncpu)
 
     erts_init_monitors();
     erts_init_gc();
-    init_time();
+    erts_init_time();
     erts_init_sys_common_misc();
     erts_init_process(ncpu);
     erts_init_scheduling(use_multi_run_queue,
@@ -289,7 +289,7 @@ erl_init(int ncpu)
     erts_delay_trap = erts_export_put(am_erlang, am_delay_trap, 2);
     erts_late_init_process();
 #if HAVE_ERTS_MSEG
-    erts_mseg_late_init(); /* Must be after timer (init_time()) and thread
+    erts_mseg_late_init(); /* Must be after timer (erts_init_time()) and thread
 			      initializations */
 #endif
 #ifdef HIPE
diff --git a/erts/emulator/beam/erl_lock_check.c b/erts/emulator/beam/erl_lock_check.c
index 7a6aaa6bbe..9e18997890 100644
--- a/erts/emulator/beam/erl_lock_check.c
+++ b/erts/emulator/beam/erl_lock_check.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2005-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2005-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -155,7 +155,7 @@ static erts_lc_lock_order_t erts_lock_order[] = {
     {	"alcu_allocator",			"index"			},
     {	"alcu_delayed_free",			"index"			},
     {	"mseg",					NULL			},
-#ifdef HALFWORD_HEAP
+#if HALFWORD_HEAP
     {	"pmmap",				NULL			},
 #endif
 #ifdef ERTS_SMP
@@ -177,6 +177,8 @@ static erts_lc_lock_order_t erts_lock_order[] = {
     {	"async_id",				NULL			},
     {	"pix_lock",				"address"		},
     {	"run_queues_lists",			NULL			},
+    {	"misc_aux_work_queue",			"index"			},
+    {	"misc_aux_work_pre_alloc_lock",		"address"		},
     {	"sched_stat",				NULL			},
     {	"run_queue_sleep_list",			"address"		},
 #endif
diff --git a/erts/emulator/beam/erl_monitors.c b/erts/emulator/beam/erl_monitors.c
index d873c7a701..9751b5d77c 100644
--- a/erts/emulator/beam/erl_monitors.c
+++ b/erts/emulator/beam/erl_monitors.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  * 
- * Copyright Ericsson AB 2004-2009. All Rights Reserved.
+ * Copyright Ericsson AB 2004-2011. All Rights Reserved.
  * 
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -85,7 +85,7 @@ static ERTS_INLINE int cmp_mon_ref(Eterm ref1, Eterm ref2)
     if (is_ref_thing_header(*b2)) {
 	return 1;
     }
-    return cmp(ref1,ref2);
+    return CMP(ref1,ref2);
 }
 	    
 #define CP_LINK_VAL(To, Hp, From)				\
@@ -380,7 +380,7 @@ int erts_add_link(ErtsLink **root, Uint type, Eterm pid)
 	    state = 1;
 	    *this = create_link(type,pid);
 	    break;
-	} else if ((c = cmp(pid,(*this)->pid)) < 0) { 
+	} else if ((c = CMP(pid,(*this)->pid)) < 0) {
 	    /* go left */
 	    dstack[dpos++] = DIR_LEFT;
 	    tstack[tpos++] = this;
@@ -415,7 +415,7 @@ erts_add_or_lookup_suspend_monitor(ErtsSuspendMonitor **root, Eterm pid)
 	    state = 1;
 	    res = *this = create_suspend_monitor(pid);
 	    break;
-	} else if ((c = cmp(pid,(*this)->pid)) < 0) { 
+	} else if ((c = CMP(pid,(*this)->pid)) < 0) {
 	    /* go left */
 	    dstack[dpos++] = DIR_LEFT;
 	    tstack[tpos++] = this;
@@ -453,7 +453,7 @@ ErtsLink *erts_add_or_lookup_link(ErtsLink **root, Uint type, Eterm pid)
 	    *this = create_link(type,pid);
 	    ret = *this;
 	    break;
-	} else if ((c = cmp(pid,(*this)->pid)) < 0) { 
+	} else if ((c = CMP(pid,(*this)->pid)) < 0) {
 	    /* go left */
 	    dstack[dpos++] = DIR_LEFT;
 	    tstack[tpos++] = this;
@@ -663,7 +663,7 @@ ErtsLink *erts_remove_link(ErtsLink **root, Eterm pid)
     for (;;) {
 	if (!*this) { /* Failure */
 	    return NULL;
-	} else if ((c = cmp(pid,(*this)->pid)) < 0) { 
+	} else if ((c = CMP(pid,(*this)->pid)) < 0) {
 	    dstack[dpos++] = DIR_LEFT;
 	    tstack[tpos++] = this;
 	    this = &((*this)->left);
@@ -715,7 +715,7 @@ erts_delete_suspend_monitor(ErtsSuspendMonitor **root, Eterm pid)
     for (;;) {
 	if (!*this) { /* Nothing found */
 	    return;
-	} else if ((c = cmp(pid,(*this)->pid)) < 0) { 
+	} else if ((c = CMP(pid,(*this)->pid)) < 0) {
 	    dstack[dpos++] = DIR_LEFT;
 	    tstack[tpos++] = this;
 	    this = &((*this)->left);
@@ -771,7 +771,7 @@ ErtsLink *erts_lookup_link(ErtsLink *root, Eterm pid)
     Sint c;
 
     for (;;) {
-	if (root == NULL || (c = cmp(pid,root->pid)) == 0) {
+	if (root == NULL || (c = CMP(pid,root->pid)) == 0) {
 	    return root;
 	} else if (c < 0) { 
 	    root = root->left;
@@ -787,7 +787,7 @@ erts_lookup_suspend_monitor(ErtsSuspendMonitor *root, Eterm pid)
     Sint c;
 
     for (;;) {
-	if (root == NULL || (c = cmp(pid,root->pid)) == 0) {
+	if (root == NULL || (c = CMP(pid,root->pid)) == 0) {
 	    return root;
 	} else if (c < 0) { 
 	    root = root->left;
diff --git a/erts/emulator/beam/erl_nif.c b/erts/emulator/beam/erl_nif.c
index a680097c2d..135c6b0ccc 100644
--- a/erts/emulator/beam/erl_nif.c
+++ b/erts/emulator/beam/erl_nif.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2009-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2009-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -81,7 +81,6 @@ static ERTS_INLINE Eterm* alloc_heap(ErlNifEnv* env, unsigned need)
 
 static Eterm* alloc_heap_heavy(ErlNifEnv* env, unsigned need, Eterm* hp)
 {    
-    unsigned frag_sz;
     env->hp = hp;
     if (env->heap_frag == NULL) {       
 	ASSERT(HEAP_LIMIT(env->proc) == env->hp_end);
@@ -91,11 +90,11 @@ static Eterm* alloc_heap_heavy(ErlNifEnv* env, unsigned need, Eterm* hp)
 	env->heap_frag->used_size = hp - env->heap_frag->mem;
 	ASSERT(env->heap_frag->used_size <= env->heap_frag->alloc_size);
     }
-    frag_sz = need + MIN_HEAP_FRAG_SZ;
-    hp = erts_heap_alloc(env->proc, frag_sz);
-    env->hp = hp + need;
-    env->hp_end = hp + frag_sz;
+    hp = erts_heap_alloc(env->proc, need, MIN_HEAP_FRAG_SZ);
     env->heap_frag = MBUF(env->proc);
+    env->hp = hp + need;
+    env->hp_end = env->heap_frag->mem + env->heap_frag->alloc_size;
+
     return hp;
 }
 
@@ -574,7 +573,7 @@ int enif_is_identical(Eterm lhs, Eterm rhs)
 
 int enif_compare(Eterm lhs, Eterm rhs)
 {
-    return cmp(lhs,rhs);
+    return CMP(lhs,rhs);
 }
 
 int enif_get_tuple(ErlNifEnv* env, Eterm tpl, int* arity, const Eterm** array)
@@ -939,21 +938,26 @@ ERL_NIF_TERM enif_make_list_cell(ErlNifEnv* env, Eterm car, Eterm cdr)
 
 ERL_NIF_TERM enif_make_list(ErlNifEnv* env, unsigned cnt, ...)
 {
-    Eterm* hp = alloc_heap(env,cnt*2);
-    Eterm ret = make_list(hp);
-    Eterm* last = &ret;
-    va_list ap;
-
-    va_start(ap,cnt);
-    while (cnt--) {
-	*last = make_list(hp);
-	*hp = va_arg(ap,Eterm);
-	last = ++hp;
-	++hp;
+    if (cnt == 0) {
+	return NIL;
+    }
+    else {
+	Eterm* hp = alloc_heap(env,cnt*2);
+	Eterm ret = make_list(hp);
+	Eterm* last = &ret;
+	va_list ap;
+
+	va_start(ap,cnt);
+	while (cnt--) {
+	    *last = make_list(hp);
+	    *hp = va_arg(ap,Eterm);
+	    last = ++hp;
+	    ++hp;
+	}
+	va_end(ap);
+	*last = NIL;
+	return ret;
     }
-    va_end(ap);
-    *last = NIL;
-    return ret;
 }
 
 ERL_NIF_TERM enif_make_list_from_array(ErlNifEnv* env, const ERL_NIF_TERM arr[], unsigned cnt)
@@ -1474,7 +1478,13 @@ BIF_RETTYPE load_nif_2(BIF_ALIST_2)
 	
 	ret = load_nif_error(BIF_P, bad_lib, "Library version (%d.%d) not compatible (with %d.%d).",
 			     entry->major, entry->minor, ERL_NIF_MAJOR_VERSION, ERL_NIF_MINOR_VERSION);
-    }    
+    }   
+    else if (entry->minor >= 1
+	     && sys_strcmp(entry->vm_variant, ERL_NIF_VM_VARIANT) != 0) {
+	ret = load_nif_error(BIF_P, bad_lib, "Library (%s) not compiled for "
+			     "this vm variant (%s).",
+			     entry->vm_variant, ERL_NIF_VM_VARIANT);
+    }
     else if (!erts_is_atom_str((char*)entry->name, mod_atom)) {
 	ret = load_nif_error(BIF_P, bad_lib, "Library module name '%s' does not"
 			     " match calling module '%T'", entry->name, mod_atom);
diff --git a/erts/emulator/beam/erl_nif.h b/erts/emulator/beam/erl_nif.h
index ee3a7cd5f4..8050b3640a 100644
--- a/erts/emulator/beam/erl_nif.h
+++ b/erts/emulator/beam/erl_nif.h
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2009-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2009-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -30,9 +30,10 @@
 ** 0.1: R13B03
 ** 1.0: R13B04
 ** 2.0: R14A
+** 2.1: R14B02 "vm_variant"
 */
 #define ERL_NIF_MAJOR_VERSION 2
-#define ERL_NIF_MINOR_VERSION 0
+#define ERL_NIF_MINOR_VERSION 1
 
 #include <stdlib.h>
 
@@ -80,8 +81,10 @@ typedef long long ErlNifSInt64;
 #endif
 
 #ifdef HALFWORD_HEAP_EMULATOR
+#  define ERL_NIF_VM_VARIANT "beam.halfword" 
 typedef unsigned int ERL_NIF_TERM;
 #else
+#  define ERL_NIF_VM_VARIANT "beam.vanilla" 
 typedef unsigned long ERL_NIF_TERM;
 #endif
 
@@ -105,7 +108,8 @@ typedef struct enif_entry_t
     int  (*load)   (ErlNifEnv*, void** priv_data, ERL_NIF_TERM load_info);
     int  (*reload) (ErlNifEnv*, void** priv_data, ERL_NIF_TERM load_info);
     int  (*upgrade)(ErlNifEnv*, void** priv_data, void** old_priv_data, ERL_NIF_TERM load_info);
-    void (*unload) (ErlNifEnv*, void* priv_data);    
+    void (*unload) (ErlNifEnv*, void* priv_data);
+    const char* vm_variant;
 }ErlNifEntry;
 
 
@@ -198,6 +202,7 @@ extern TWinDynNifCallbacks WinDynNifCallbacks;
 #define ERL_NIF_INIT(NAME, FUNCS, LOAD, RELOAD, UPGRADE, UNLOAD) \
 ERL_NIF_INIT_PROLOGUE                   \
 ERL_NIF_INIT_GLOB                       \
+ERL_NIF_INIT_DECL(NAME);		\
 ERL_NIF_INIT_DECL(NAME)			\
 {					\
     static ErlNifEntry entry = 		\
@@ -207,7 +212,8 @@ ERL_NIF_INIT_DECL(NAME)			\
 	#NAME,				\
 	sizeof(FUNCS) / sizeof(*FUNCS),	\
 	FUNCS,				\
-	LOAD, RELOAD, UPGRADE, UNLOAD	\
+	LOAD, RELOAD, UPGRADE, UNLOAD,	\
+	ERL_NIF_VM_VARIANT		\
     };                                  \
     ERL_NIF_INIT_BODY;                  \
     return &entry;			\
diff --git a/erts/emulator/beam/erl_node_container_utils.h b/erts/emulator/beam/erl_node_container_utils.h
index ae1316eba2..2c67e781e0 100644
--- a/erts/emulator/beam/erl_node_container_utils.h
+++ b/erts/emulator/beam/erl_node_container_utils.h
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2001-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2001-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -255,19 +255,32 @@ extern int erts_use_r9_pids_ports;
 
 #define internal_ref_no_of_numbers(x)					\
   (internal_ref_data((x))[0])
+#define internal_thing_ref_no_of_numbers(thing)			        \
+  (internal_thing_ref_data(thing)[0])
 #define internal_ref_numbers(x)						\
   (&internal_ref_data((x))[1])
+#define internal_thing_ref_numbers(thing)				\
+  (&internal_thing_ref_data(thing)[1])
 #define external_ref_no_of_numbers(x)					\
   (external_ref_data((x))[0])
+#define external_thing_ref_no_of_numbers(thing)			        \
+  (external_thing_ref_data(thing)[0])
 #define external_ref_numbers(x)						\
   (&external_ref_data((x))[1])
+#define external_thing_ref_numbers(thing)				\
+  (&external_thing_ref_data(thing)[1])
+
 
 #else
 
 #define internal_ref_no_of_numbers(x)	(internal_ref_data_words((x)))
+#define internal_thing_ref_no_of_numbers(t) (internal_thing_ref_data_words(t))
 #define internal_ref_numbers(x)		(internal_ref_data((x)))
+#define internal_thing_ref_numbers(t)   (internal_thing_ref_data(t))
 #define external_ref_no_of_numbers(x)	(external_ref_data_words((x)))
+#define external_thing_ref_no_of_numbers(t) (external_thing_ref_data_words((t)))
 #define external_ref_numbers(x)		(external_ref_data((x)))
+#define external_thing_ref_numbers(t)   (external_thing_ref_data((t)))
 
 #endif
 
@@ -311,6 +324,8 @@ extern int erts_use_r9_pids_ports;
 					 : external_ref_channel_no((x)))
 #define is_ref(x)			(is_internal_ref((x))		\
 					 || is_external_ref((x)))
+#define is_ref_rel(x,Base)		(is_internal_ref_rel((x),Base)	\
+					 || is_external_ref_rel((x),Base))
 #define is_not_ref(x)			(!is_ref(x))
 
 #endif
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index 77ee1d6ac5..4d6e982325 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -590,6 +590,122 @@ erts_sched_finish_poke(ErtsSchedulerSleepInfo *ssi, erts_aint32_t flags)
     }
 }
 
+typedef struct erts_misc_aux_work_t_ erts_misc_aux_work_t;
+struct erts_misc_aux_work_t_ {
+    erts_misc_aux_work_t *next;
+    void (*func)(void *);
+    void *arg;
+};
+
+typedef struct {
+    erts_smp_mtx_t mtx;
+    erts_misc_aux_work_t *first;
+    erts_misc_aux_work_t *last;
+} erts_misc_aux_work_q_t;
+
+typedef union {
+    erts_misc_aux_work_q_t data;
+    char align[ERTS_ALC_CACHE_LINE_ALIGN_SIZE(sizeof(erts_misc_aux_work_q_t))];
+} erts_algnd_misc_aux_work_q_t;
+
+static erts_algnd_misc_aux_work_q_t *misc_aux_work_queues;
+
+ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(misc_aux_work,
+				 erts_misc_aux_work_t,
+				 200,
+				 ERTS_ALC_T_MISC_AUX_WORK)
+
+static void
+init_misc_aux_work(void)
+{
+    int ix;
+
+    init_misc_aux_work_alloc();
+
+    misc_aux_work_queues = erts_alloc(ERTS_ALC_T_MISC_AUX_WORK_Q,
+				      (sizeof(erts_algnd_misc_aux_work_q_t)
+				       *(erts_no_schedulers+1)));
+    if ((((UWord) misc_aux_work_queues) & ERTS_CACHE_LINE_MASK) != 0)
+	misc_aux_work_queues = ((erts_algnd_misc_aux_work_q_t *)
+				   ((((UWord) misc_aux_work_queues)
+				     & ~ERTS_CACHE_LINE_MASK)
+				    + ERTS_CACHE_LINE_SIZE));
+
+    for (ix = 0; ix < erts_no_schedulers; ix++) {
+	erts_smp_mtx_init_x(&misc_aux_work_queues[ix].data.mtx,
+			    "misc_aux_work_queue",
+			    make_small(ix + 1));
+	misc_aux_work_queues[ix].data.first = NULL;
+	misc_aux_work_queues[ix].data.last = NULL;
+    }
+}
+
+static void
+handle_misc_aux_work(ErtsSchedulerData *esdp)
+{
+    int ix = (int) esdp->no - 1;
+    erts_misc_aux_work_t *mawp;
+
+    erts_smp_mtx_lock(&misc_aux_work_queues[ix].data.mtx);
+    mawp = misc_aux_work_queues[ix].data.first;
+    misc_aux_work_queues[ix].data.first = NULL;
+    misc_aux_work_queues[ix].data.last = NULL;
+    erts_smp_mtx_unlock(&misc_aux_work_queues[ix].data.mtx);
+
+    while (mawp) {
+	erts_misc_aux_work_t *free_mawp;
+	mawp->func(mawp->arg);
+	free_mawp = mawp;
+	mawp = mawp->next;
+	misc_aux_work_free(free_mawp);
+    }
+}
+
+void
+erts_smp_schedule_misc_aux_work(int ignore_self,
+				int max_sched,
+				void (*func)(void *),
+				void *arg)
+{
+    int ix, ignore_ix = -1;
+
+    if (ignore_self) {
+	ErtsSchedulerData *esdp = erts_get_scheduler_data();
+	if (esdp)
+	    ignore_ix = (int) esdp->no - 1;
+    }
+
+    ASSERT(0 <= max_sched && max_sched <= erts_no_schedulers);
+
+    for (ix = 0; ix < max_sched; ix++) {
+	erts_aint32_t aux_work;
+	erts_misc_aux_work_t *mawp;
+	ErtsSchedulerSleepInfo *ssi;
+	if (ix == ignore_ix)
+	    continue;
+
+	mawp = misc_aux_work_alloc();
+
+	mawp->func = func;
+	mawp->arg = arg;
+	mawp->next = NULL;
+
+	erts_smp_mtx_lock(&misc_aux_work_queues[ix].data.mtx);
+	if (!misc_aux_work_queues[ix].data.last)
+	    misc_aux_work_queues[ix].data.first = mawp;
+	else
+	    misc_aux_work_queues[ix].data.last->next = mawp;
+	misc_aux_work_queues[ix].data.last = mawp;
+	erts_smp_mtx_unlock(&misc_aux_work_queues[ix].data.mtx);
+
+	ssi = ERTS_SCHED_SLEEP_INFO_IX(ix);
+	aux_work = erts_smp_atomic32_bor(&ssi->aux_work,
+					 ERTS_SSI_AUX_WORK_MISC);
+	if ((aux_work & ERTS_SSI_AUX_WORK_MISC) == 0)
+	    erts_sched_poke(ssi);
+   }
+}
+
 #ifdef ERTS_SMP_SCHEDULERS_NEED_TO_CHECK_CHILDREN
 void
 erts_smp_notify_check_children_needed(void)
@@ -615,6 +731,12 @@ blockable_aux_work(ErtsSchedulerData *esdp,
 		   erts_aint32_t aux_work)
 {
     if (aux_work & ERTS_SSI_BLOCKABLE_AUX_WORK_MASK) {
+	if (aux_work & ERTS_SSI_AUX_WORK_MISC) {
+	    aux_work = erts_smp_atomic32_band(&ssi->aux_work,
+					      ~ERTS_SSI_AUX_WORK_MISC);
+	    aux_work &= ~ERTS_SSI_AUX_WORK_MISC;
+	    handle_misc_aux_work(esdp);
+	}
 #ifdef ERTS_SMP_SCHEDULERS_NEED_TO_CHECK_CHILDREN
 	if (aux_work & ERTS_SSI_AUX_WORK_CHECK_CHILDREN) {
 	    aux_work = erts_smp_atomic32_band(&ssi->aux_work,
@@ -997,8 +1119,8 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq)
 
 	    erl_sys_schedule(1); /* Might give us something to do */
 
-	    dt = do_time_read_and_reset();
-	    if (dt) bump_timer(dt);
+	    dt = erts_do_time_read_and_reset();
+	    if (dt) erts_bump_timer(dt);
 
 	sys_aux_work:
 
@@ -1094,8 +1216,8 @@ scheduler_wait(int *fcalls, ErtsSchedulerData *esdp, ErtsRunQueue *rq)
 
 	    erl_sys_schedule(0);
 
-	    dt = do_time_read_and_reset();
-	    if (dt) bump_timer(dt);
+	    dt = erts_do_time_read_and_reset();
+	    if (dt) erts_bump_timer(dt);
 
 	    flgs = sched_prep_cont_spin_wait(ssi);
 	    if (flgs & ERTS_SSI_FLG_WAITING)
@@ -2612,6 +2734,8 @@ erts_init_scheduling(int mrq, int no_schedulers, int no_schedulers_online)
 
     erts_smp_atomic32_init(&doing_sys_schedule, 0);
 
+    init_misc_aux_work();
+
 #else /* !ERTS_SMP */
     {
 	ErtsSchedulerData *esdp;
@@ -2628,6 +2752,15 @@ erts_init_scheduling(int mrq, int no_schedulers, int no_schedulers_online)
 
     /* init port tasks */
     erts_port_task_init();
+
+#ifndef ERTS_SMP
+#ifdef ERTS_DO_VERIFY_UNUSED_TEMP_ALLOC
+    erts_scheduler_data->verify_unused_temp_alloc
+	= erts_alloc_get_verify_unused_temp_alloc(
+	    &erts_scheduler_data->verify_unused_temp_alloc_data);
+    ERTS_VERIFY_UNUSED_TEMP_ALLOC(NULL);
+#endif
+#endif
 }
 
 ErtsRunQueue *
@@ -2739,6 +2872,19 @@ resume_process(Process *p)
     p->rstatus = P_FREE;    
 }
 
+int
+erts_get_max_no_executing_schedulers(void)
+{
+#ifdef ERTS_SMP
+    if (erts_smp_atomic32_read(&schdlr_sspnd.changing))
+	return (int) erts_no_schedulers;
+    ERTS_THR_MEMORY_BARRIER;
+    return (int) erts_smp_atomic32_read(&schdlr_sspnd.active);
+#else
+    return 1;
+#endif
+}
+
 #ifdef ERTS_SMP
 
 static void
@@ -3574,6 +3720,13 @@ sched_thread_func(void *vesdp)
     }
     erts_smp_mtx_unlock(&schdlr_sspnd.mtx);
 
+#ifdef ERTS_DO_VERIFY_UNUSED_TEMP_ALLOC
+    ((ErtsSchedulerData *) vesdp)->verify_unused_temp_alloc
+	= erts_alloc_get_verify_unused_temp_alloc(
+	    &((ErtsSchedulerData *) vesdp)->verify_unused_temp_alloc_data);
+    ERTS_VERIFY_UNUSED_TEMP_ALLOC(NULL);
+#endif
+
     process_main();
     /* No schedulers should *ever* terminate */
     erl_exit(ERTS_ABORT_EXIT, "Scheduler thread number %bpu terminated\n",
@@ -5070,10 +5223,10 @@ Process *schedule(Process *p, int calls)
 
 	ERTS_SMP_CHK_NO_PROC_LOCKS;
 
-	dt = do_time_read_and_reset();
+	dt = erts_do_time_read_and_reset();
 	if (dt) {
 	    erts_smp_runq_unlock(rq);
-	    bump_timer(dt);
+	    erts_bump_timer(dt);
 	    erts_smp_runq_lock(rq);
 	}
 	BM_STOP_TIMER(system);
@@ -5214,8 +5367,8 @@ Process *schedule(Process *p, int calls)
 #endif
 	    erts_smp_runq_unlock(rq);
 	    erl_sys_schedule(runnable);
-	    dt = do_time_read_and_reset();
-	    if (dt) bump_timer(dt);
+	    dt = erts_do_time_read_and_reset();
+	    if (dt) erts_bump_timer(dt);
 #ifdef ERTS_SMP
 	    erts_smp_runq_lock(rq);
 	    erts_smp_atomic32_set(&doing_sys_schedule, 0);
@@ -6931,11 +7084,11 @@ static void doit_exit_monitor(ErtsMonitor *mon, void *vpcontext)
 	    DeclareTmpHeapNoproc(lhp,3);
 	    ErtsProcLocks rp_locks = (ERTS_PROC_LOCK_LINK
 				      | ERTS_PROC_LOCKS_MSG_SEND);
-	    UseTmpHeapNoproc(3);
 	    rp = erts_pid2proc(NULL, 0, mon->pid, rp_locks);
 	    if (rp == NULL) {
 		goto done;
 	    }
+	    UseTmpHeapNoproc(3);
 	    rmon = erts_remove_monitor(&(rp->monitors),mon->ref);
 	    if (rmon) {
 		erts_destroy_monitor(rmon);
@@ -7476,7 +7629,7 @@ cancel_timer(Process* p)
 #ifdef ERTS_SMP
     erts_cancel_smp_ptimer(p->u.ptimer);
 #else
-    erl_cancel_timer(&p->u.tm);
+    erts_cancel_timer(&p->u.tm);
 #endif
 }
 
@@ -7502,7 +7655,7 @@ set_timer(Process* p, Uint timeout)
 			   (ErlTimeoutProc) timeout_proc,
 			   timeout);
 #else
-    erl_set_timer(&p->u.tm,
+    erts_set_timer(&p->u.tm,
 		  (ErlTimeoutProc) timeout_proc,
 		  NULL,
 		  (void*) p,
diff --git a/erts/emulator/beam/erl_process.h b/erts/emulator/beam/erl_process.h
index 8e32121a68..e871a9834a 100644
--- a/erts/emulator/beam/erl_process.h
+++ b/erts/emulator/beam/erl_process.h
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -28,6 +28,12 @@
 #define ERTS_INCLUDE_SCHEDULER_INTERNALS
 #endif
 
+/* #define ERTS_DO_VERIFY_UNUSED_TEMP_ALLOC */
+
+#if !defined(ERTS_DO_VERIFY_UNUSED_TEMP_ALLOC) && defined(DEBUG)
+#  define ERTS_DO_VERIFY_UNUSED_TEMP_ALLOC
+#endif
+
 typedef struct process Process;
 
 #include "sys.h"
@@ -236,16 +242,14 @@ typedef enum {
   | ERTS_SSI_FLG_WAITING				\
   | ERTS_SSI_FLG_SUSPENDED)
 
-
-#if !defined(ERTS_SCHED_NEED_BLOCKABLE_AUX_WORK) \
-    && defined(ERTS_SMP_SCHEDULERS_NEED_TO_CHECK_CHILDREN)
 #define ERTS_SCHED_NEED_BLOCKABLE_AUX_WORK
-#endif
 
 #define ERTS_SSI_AUX_WORK_CHECK_CHILDREN	(((erts_aint32_t) 1) << 0)
+#define ERTS_SSI_AUX_WORK_MISC			(((erts_aint32_t) 1) << 1)
 
 #define ERTS_SSI_BLOCKABLE_AUX_WORK_MASK \
-  (ERTS_SSI_AUX_WORK_CHECK_CHILDREN)
+  (ERTS_SSI_AUX_WORK_CHECK_CHILDREN \
+   | ERTS_SSI_AUX_WORK_MISC)
 #define ERTS_SSI_NONBLOCKABLE_AUX_WORK_MASK \
   (0)
 
@@ -423,6 +427,11 @@ struct ErtsSchedulerData_ {
     /* NOTE: These fields are modified under held mutexes by other threads */
     erts_smp_atomic32_t chk_cpu_bind; /* Only used when common run queue */
 #endif
+
+#ifdef ERTS_DO_VERIFY_UNUSED_TEMP_ALLOC
+    erts_alloc_verify_func_t verify_unused_temp_alloc;
+    Allctr_t *verify_unused_temp_alloc_data;
+#endif
 };
 
 typedef union {
@@ -826,7 +835,7 @@ ERTS_GLB_INLINE void erts_heap_frag_shrink(Process* p, Eterm* hp)
 }	
 #endif /* inline */
 
-Eterm* erts_heap_alloc(Process* p, Uint need);
+Eterm* erts_heap_alloc(Process* p, Uint need, Uint xtra);
 #ifdef CHECK_FOR_HOLES
 Eterm* erts_set_hole_marker(Eterm* ptr, Uint sz);
 #endif
@@ -1034,6 +1043,7 @@ int erts_sched_set_wakeup_limit(char *str);
 #ifdef DEBUG
 void erts_dbg_multi_scheduling_return_trap(Process *, Eterm);
 #endif
+int erts_get_max_no_executing_schedulers(void);
 #ifdef ERTS_SMP
 ErtsSchedSuspendResult
 erts_schedulers_state(Uint *, Uint *, Uint *, int);
@@ -1048,6 +1058,11 @@ int erts_is_multi_scheduling_blocked(void);
 Eterm erts_multi_scheduling_blockers(Process *);
 void erts_start_schedulers(void);
 void erts_smp_notify_check_children_needed(void);
+void
+erts_smp_schedule_misc_aux_work(int ignore_self,
+				int max_sched,
+				void (*func)(void *),
+				void *arg);
 #endif
 void erts_sched_notify_check_cpu_bind(void);
 Uint erts_active_schedulers(void);
@@ -1141,6 +1156,20 @@ Uint erts_debug_nbalance(void);
 #  define ERTS_PROC_GET_SCHDATA(PROC) (erts_scheduler_data)
 #endif
 
+#ifdef ERTS_DO_VERIFY_UNUSED_TEMP_ALLOC
+#  define ERTS_VERIFY_UNUSED_TEMP_ALLOC(P)					\
+do {										\
+    ErtsSchedulerData *esdp__ = ((P)						\
+				 ? ERTS_PROC_GET_SCHDATA((Process *) (P))	\
+				 : erts_get_scheduler_data());			\
+    if (esdp__)									\
+	esdp__->verify_unused_temp_alloc(					\
+	    esdp__->verify_unused_temp_alloc_data);				\
+} while (0)
+#else
+#  define ERTS_VERIFY_UNUSED_TEMP_ALLOC(ESDP)
+#endif
+
 #if defined(ERTS_SMP) || defined(USE_THREADS)
 ErtsSchedulerData *erts_get_scheduler_data(void);
 #else
diff --git a/erts/emulator/beam/erl_process_dump.c b/erts/emulator/beam/erl_process_dump.c
index 7a7042abe4..68fda01597 100644
--- a/erts/emulator/beam/erl_process_dump.c
+++ b/erts/emulator/beam/erl_process_dump.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2003-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2003-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -261,139 +261,139 @@ print_function_from_pc(int to, void *to_arg, BeamInstr* x)
 static void
 heap_dump(int to, void *to_arg, Eterm x)
 {
+    DeclareTmpHeapNoproc(last,1);
+    Eterm* next = last;
     Eterm* ptr;
-    Eterm last = OUR_NIL;
-    Eterm* next = &last;
 
     if (is_immed(x) || is_CP(x)) {
 	return;
     }
-
- again:
-    if (x == OUR_NIL) {	/* We are done. */
-	return;
-    } if (is_CP(x)) {
-	next = (Eterm *) EXPAND_POINTER(x);
-    } else if (is_list(x)) {
-	ptr = list_val(x);
-	if (ptr[0] != OUR_NIL) {
-	    erts_print(to, to_arg, ADDR_FMT ":l", ptr);
-	    dump_element(to, to_arg, ptr[0]);
-	    erts_putc(to, to_arg, '|');
-	    dump_element(to, to_arg, ptr[1]);
-	    erts_putc(to, to_arg, '\n');
-	    if (is_immed(ptr[1])) {
-		ptr[1] = make_small(0);
-	    }
-	    x = ptr[0];
-	    ptr[0] = (Eterm) COMPRESS_POINTER(next);
-	    next = ptr + 1;
-	    goto again;
-	}
-    } else if (is_boxed(x)) {
-	Eterm hdr;
-	
-	ptr = boxed_val(x);
-	hdr = *ptr;
-	if (hdr != OUR_NIL) {	/* If not visited */
-	    erts_print(to, to_arg, ADDR_FMT ":", ptr);
-	    if (is_arity_value(hdr)) {
-		Uint i;
-		Uint arity = arityval(hdr);
-
-		erts_print(to, to_arg, "t" WORD_FMT ":", arity);
-		for (i = 1; i <= arity; i++) {
-		    dump_element(to, to_arg, ptr[i]);
-		    if (is_immed(ptr[i])) {
-			ptr[i] = make_small(0);
-		    }
-		    if (i < arity) {
-			erts_putc(to, to_arg, ',');
-		    }
-		}
+    UseTmpHeapNoproc(1);
+    *last = OUR_NIL;
+
+    while (x != OUR_NIL) {
+	if (is_CP(x)) {
+	    next = (Eterm *) EXPAND_POINTER(x);
+	} else if (is_list(x)) {
+	    ptr = list_val(x);
+	    if (ptr[0] != OUR_NIL) {
+		erts_print(to, to_arg, ADDR_FMT ":l", ptr);
+		dump_element(to, to_arg, ptr[0]);
+		erts_putc(to, to_arg, '|');
+		dump_element(to, to_arg, ptr[1]);
 		erts_putc(to, to_arg, '\n');
-		if (arity == 0) {
-		    ptr[0] = OUR_NIL;
-		} else {
-		    x = ptr[arity];
-		    ptr[0] = (Eterm) COMPRESS_POINTER(next);
-		    next = ptr + arity - 1;
-		    goto again;
+		if (is_immed(ptr[1])) {
+		    ptr[1] = make_small(0);
 		}
-	    } else if (hdr == HEADER_FLONUM) {
-		FloatDef f;
-		char sbuf[31];
-		int i;
-
-		GET_DOUBLE_DATA((ptr+1), f);
-		i = sys_double_to_chars(f.fd, (char*) sbuf);
-		sys_memset(sbuf+i, 0, 31-i);
-		erts_print(to, to_arg, "F%X:%s\n", i, sbuf);
-		*ptr = OUR_NIL;
-	    } else if (_is_bignum_header(hdr)) {
-		erts_print(to, to_arg, "B%T\n", x);
-		*ptr = OUR_NIL;
-	    } else if (is_binary_header(hdr)) {
-		Uint tag = thing_subtag(hdr);
-		Uint size = binary_size(x);
-		Uint i;
-
-		if (tag == HEAP_BINARY_SUBTAG) {
-		    byte* p;
-
-		    erts_print(to, to_arg, "Yh%X:", size);
-		    p = binary_bytes(x);
-		    for (i = 0; i < size; i++) {
-			erts_print(to, to_arg, "%02X", p[i]);
+		x = ptr[0];
+		ptr[0] = (Eterm) COMPRESS_POINTER(next);
+		next = ptr + 1;
+		continue;
+	    }
+	} else if (is_boxed(x)) {
+	    Eterm hdr;
+
+	    ptr = boxed_val(x);
+	    hdr = *ptr;
+	    if (hdr != OUR_NIL) {	/* If not visited */
+		erts_print(to, to_arg, ADDR_FMT ":", ptr);
+	        if (is_arity_value(hdr)) {
+		    Uint i;
+		    Uint arity = arityval(hdr);
+
+		    erts_print(to, to_arg, "t" WORD_FMT ":", arity);
+		    for (i = 1; i <= arity; i++) {
+			dump_element(to, to_arg, ptr[i]);
+			if (is_immed(ptr[i])) {
+			    ptr[i] = make_small(0);
+			}
+			if (i < arity) {
+			    erts_putc(to, to_arg, ',');
+			}
 		    }
-		} else if (tag == REFC_BINARY_SUBTAG) {
-		    ProcBin* pb = (ProcBin *) binary_val(x);
-		    Binary* val = pb->val;
-
-		    if (erts_smp_atomic_xchg(&val->refc, 0) != 0) {
-			val->flags = (UWord) all_binaries;
-			all_binaries = val;
+		    erts_putc(to, to_arg, '\n');
+		    if (arity == 0) {
+			ptr[0] = OUR_NIL;
+		    } else {
+			x = ptr[arity];
+			ptr[0] = (Eterm) COMPRESS_POINTER(next);
+			next = ptr + arity - 1;
+			continue;
 		    }
-		    erts_print(to, to_arg, "Yc%X:%X:%X", val,
-			       pb->bytes - (byte *)val->orig_bytes,
-			       size);
-		} else if (tag == SUB_BINARY_SUBTAG) {
-		    ErlSubBin* Sb = (ErlSubBin *) binary_val(x);
-		    Eterm* real_bin = binary_val(Sb->orig);
-		    void* val;
-
-		    if (thing_subtag(*real_bin) == REFC_BINARY_SUBTAG) {
-			ProcBin* pb = (ProcBin *) real_bin;
-			val = pb->val;
-		    } else {	/* Heap binary */
-			val = real_bin;
+		} else if (hdr == HEADER_FLONUM) {
+		    FloatDef f;
+		    char sbuf[31];
+		    int i;
+
+		    GET_DOUBLE_DATA((ptr+1), f);
+		    i = sys_double_to_chars(f.fd, (char*) sbuf);
+		    sys_memset(sbuf+i, 0, 31-i);
+		    erts_print(to, to_arg, "F%X:%s\n", i, sbuf);
+		    *ptr = OUR_NIL;
+		} else if (_is_bignum_header(hdr)) {
+		    erts_print(to, to_arg, "B%T\n", x);
+		    *ptr = OUR_NIL;
+		} else if (is_binary_header(hdr)) {
+		    Uint tag = thing_subtag(hdr);
+		    Uint size = binary_size(x);
+		    Uint i;
+
+		    if (tag == HEAP_BINARY_SUBTAG) {
+			byte* p;
+
+			erts_print(to, to_arg, "Yh%X:", size);
+			p = binary_bytes(x);
+			for (i = 0; i < size; i++) {
+			    erts_print(to, to_arg, "%02X", p[i]);
+			}
+		    } else if (tag == REFC_BINARY_SUBTAG) {
+			ProcBin* pb = (ProcBin *) binary_val(x);
+			Binary* val = pb->val;
+
+			if (erts_smp_atomic_xchg(&val->refc, 0) != 0) {
+			    val->flags = (UWord) all_binaries;
+			    all_binaries = val;
+			}
+			erts_print(to, to_arg, "Yc%X:%X:%X", val,
+				   pb->bytes - (byte *)val->orig_bytes,
+				   size);
+		    } else if (tag == SUB_BINARY_SUBTAG) {
+			ErlSubBin* Sb = (ErlSubBin *) binary_val(x);
+			Eterm* real_bin = binary_val(Sb->orig);
+			void* val;
+
+			if (thing_subtag(*real_bin) == REFC_BINARY_SUBTAG) {
+			    ProcBin* pb = (ProcBin *) real_bin;
+			    val = pb->val;
+			} else {	/* Heap binary */
+			    val = real_bin;
+			}
+			erts_print(to, to_arg, "Ys%X:%X:%X", val, Sb->offs, size);
 		    }
-		    erts_print(to, to_arg, "Ys%X:%X:%X", val, Sb->offs, size);
+		    erts_putc(to, to_arg, '\n');
+		    *ptr = OUR_NIL;
+		} else if (is_external_pid_header(hdr)) {
+		    erts_print(to, to_arg, "P%T\n", x);
+		    *ptr = OUR_NIL;
+		} else if (is_external_port_header(hdr)) {
+		    erts_print(to, to_arg, "p<%bpu.%bpu>\n",
+			       port_channel_no(x), port_number(x));
+		    *ptr = OUR_NIL;
+		} else {
+		    /*
+		     * All other we dump in the external term format.
+		     */
+			dump_externally(to, to_arg, x);
+		    erts_putc(to, to_arg, '\n');
+		    *ptr = OUR_NIL;
 		}
-		erts_putc(to, to_arg, '\n');
-		*ptr = OUR_NIL;
-	    } else if (is_external_pid_header(hdr)) {
-		erts_print(to, to_arg, "P%T\n", x);
-		*ptr = OUR_NIL;
-	    } else if (is_external_port_header(hdr)) {
-		erts_print(to, to_arg, "p<%bpu.%bpu>\n",
-			   port_channel_no(x), port_number(x));
-		*ptr = OUR_NIL;
-	    } else {
-		/*
-		 * All other we dump in the external term format.
-		 */
-		dump_externally(to, to_arg, x);
-		erts_putc(to, to_arg, '\n');
-		*ptr = OUR_NIL;
 	    }
 	}
+	x = *next;
+	*next = OUR_NIL;
+	next--;
     }
-
-    x = *next;
-    *next = OUR_NIL;
-    next--;
-    goto again;
+    UnUseTmpHeapNoproc(1);
 }
 
 static void
diff --git a/erts/emulator/beam/erl_term.c b/erts/emulator/beam/erl_term.c
index c6458a0e45..f77e8b798f 100644
--- a/erts/emulator/beam/erl_term.c
+++ b/erts/emulator/beam/erl_term.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2000-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2000-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -58,9 +58,9 @@ do { \
 #endif
 
 #if ET_DEBUG
-unsigned tag_val_def_debug(Eterm x, const char *file, unsigned line)
+unsigned tag_val_def_debug(Wterm x, const char *file, unsigned line)
 #else
-unsigned tag_val_def(Eterm x)
+unsigned tag_val_def(Wterm x)
 #define file __FILE__
 #define line __LINE__
 #endif
@@ -125,10 +125,10 @@ FUNTY checked_##FUN(ARGTY x, const char *file, unsigned line) \
 
 ET_DEFINE_CHECKED(Eterm,make_boxed,Eterm*,_is_taggable_pointer);
 ET_DEFINE_CHECKED(int,is_boxed,Eterm,!is_header);
-ET_DEFINE_CHECKED(Eterm*,boxed_val,Eterm,_boxed_precond);
+ET_DEFINE_CHECKED(Eterm*,boxed_val,Wterm,_boxed_precond);
 ET_DEFINE_CHECKED(Eterm,make_list,Eterm*,_is_taggable_pointer);
 ET_DEFINE_CHECKED(int,is_not_list,Eterm,!is_header);
-ET_DEFINE_CHECKED(Eterm*,list_val,Eterm,_list_precond);
+ET_DEFINE_CHECKED(Eterm*,list_val,Wterm,_list_precond);
 ET_DEFINE_CHECKED(Uint,unsigned_val,Eterm,is_small);
 ET_DEFINE_CHECKED(Sint,signed_val,Eterm,is_small);
 ET_DEFINE_CHECKED(Uint,atom_val,Eterm,is_atom);
@@ -136,34 +136,35 @@ ET_DEFINE_CHECKED(Uint,header_arity,Eterm,is_header);
 ET_DEFINE_CHECKED(Uint,arityval,Eterm,is_arity_value);
 ET_DEFINE_CHECKED(Uint,thing_arityval,Eterm,is_thing);
 ET_DEFINE_CHECKED(Uint,thing_subtag,Eterm,is_thing);
-ET_DEFINE_CHECKED(Eterm*,binary_val,Eterm,is_binary);
-ET_DEFINE_CHECKED(Eterm*,fun_val,Eterm,is_fun);
+ET_DEFINE_CHECKED(Eterm*,binary_val,Wterm,is_binary);
+ET_DEFINE_CHECKED(Eterm*,fun_val,Wterm,is_fun);
 ET_DEFINE_CHECKED(int,bignum_header_is_neg,Eterm,_is_bignum_header);
 ET_DEFINE_CHECKED(Eterm,bignum_header_neg,Eterm,_is_bignum_header);
 ET_DEFINE_CHECKED(Uint,bignum_header_arity,Eterm,_is_bignum_header);
-ET_DEFINE_CHECKED(Eterm*,big_val,Eterm,is_big);
-ET_DEFINE_CHECKED(Eterm*,float_val,Eterm,is_float);
-ET_DEFINE_CHECKED(Eterm*,tuple_val,Eterm,is_tuple);
+ET_DEFINE_CHECKED(Eterm*,big_val,Wterm,is_big);
+ET_DEFINE_CHECKED(Eterm*,float_val,Wterm,is_float);
+ET_DEFINE_CHECKED(Eterm*,tuple_val,Wterm,is_tuple);
 ET_DEFINE_CHECKED(Uint,internal_pid_data,Eterm,is_internal_pid);
 ET_DEFINE_CHECKED(struct erl_node_*,internal_pid_node,Eterm,is_internal_pid);
 ET_DEFINE_CHECKED(Uint,internal_port_data,Eterm,is_internal_port);
 ET_DEFINE_CHECKED(struct erl_node_*,internal_port_node,Eterm,is_internal_port);
-ET_DEFINE_CHECKED(Eterm*,internal_ref_val,Eterm,is_internal_ref);
-ET_DEFINE_CHECKED(Uint,internal_ref_data_words,Eterm,is_internal_ref);
-ET_DEFINE_CHECKED(Uint32*,internal_ref_data,Eterm,is_internal_ref);
+ET_DEFINE_CHECKED(Eterm*,internal_ref_val,Wterm,is_internal_ref);
+ET_DEFINE_CHECKED(Uint,internal_ref_data_words,Wterm,is_internal_ref);
+ET_DEFINE_CHECKED(Uint32*,internal_ref_data,Wterm,is_internal_ref);
 ET_DEFINE_CHECKED(struct erl_node_*,internal_ref_node,Eterm,is_internal_ref);
-ET_DEFINE_CHECKED(Eterm*,external_val,Eterm,is_external);
-ET_DEFINE_CHECKED(Uint,external_data_words,Eterm,is_external);
-ET_DEFINE_CHECKED(Uint,external_pid_data_words,Eterm,is_external_pid);
-ET_DEFINE_CHECKED(Uint,external_pid_data,Eterm,is_external_pid);
-ET_DEFINE_CHECKED(struct erl_node_*,external_pid_node,Eterm,is_external_pid);
-ET_DEFINE_CHECKED(Uint,external_port_data_words,Eterm,is_external_port);
-ET_DEFINE_CHECKED(Uint,external_port_data,Eterm,is_external_port);
-ET_DEFINE_CHECKED(struct erl_node_*,external_port_node,Eterm,is_external_port);
-ET_DEFINE_CHECKED(Uint,external_ref_data_words,Eterm,is_external_ref);
-ET_DEFINE_CHECKED(Uint32*,external_ref_data,Eterm,is_external_ref);
+ET_DEFINE_CHECKED(Eterm*,external_val,Wterm,is_external);
+ET_DEFINE_CHECKED(Uint,external_data_words,Wterm,is_external);
+ET_DEFINE_CHECKED(Uint,external_pid_data_words,Wterm,is_external_pid);
+ET_DEFINE_CHECKED(Uint,external_pid_data,Wterm,is_external_pid);
+ET_DEFINE_CHECKED(struct erl_node_*,external_pid_node,Wterm,is_external_pid);
+ET_DEFINE_CHECKED(Uint,external_port_data_words,Wterm,is_external_port);
+ET_DEFINE_CHECKED(Uint,external_port_data,Wterm,is_external_port);
+ET_DEFINE_CHECKED(struct erl_node_*,external_port_node,Wterm,is_external_port);
+ET_DEFINE_CHECKED(Uint,external_ref_data_words,Wterm,is_external_ref);
+ET_DEFINE_CHECKED(Uint32*,external_ref_data,Wterm,is_external_ref);
 ET_DEFINE_CHECKED(struct erl_node_*,external_ref_node,Eterm,is_external_ref);
-ET_DEFINE_CHECKED(Eterm*,export_val,Eterm,is_export);
+ET_DEFINE_CHECKED(Eterm*,export_val,Wterm,is_export);
+ET_DEFINE_CHECKED(Uint,external_thing_data_words,ExternalThing*,is_thing_ptr);
 
 ET_DEFINE_CHECKED(Eterm,make_cp,UWord *,_is_taggable_pointer);
 ET_DEFINE_CHECKED(UWord *,cp_val,Eterm,is_CP);
diff --git a/erts/emulator/beam/erl_term.h b/erts/emulator/beam/erl_term.h
index b8e4473141..1d75fa313c 100644
--- a/erts/emulator/beam/erl_term.h
+++ b/erts/emulator/beam/erl_term.h
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2000-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2000-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -22,6 +22,8 @@
 
 #include "sys.h" /* defines HALFWORD_HEAP */
 
+typedef UWord Wterm;  /* Full word terms */
+
 #if HALFWORD_HEAP
 #  define HEAP_ON_C_STACK 0
 #  if HALFWORD_ASSERT
@@ -193,7 +195,7 @@ struct erl_node_; /* Declared in erl_node_tables.h */
 #endif
 #define _is_aligned(x)		(((Uint)(x) & 0x3) == 0)
 #define _unchecked_make_boxed(x) ((Uint) COMPRESS_POINTER(x) + TAG_PRIMARY_BOXED)
-_ET_DECLARE_CHECKED(Eterm,make_boxed,Eterm*);
+_ET_DECLARE_CHECKED(Eterm,make_boxed,Eterm*)
 #define make_boxed(x)		_ET_APPLY(make_boxed,(x))
 #if 1
 #define _is_not_boxed(x)	((x) & (_TAG_PRIMARY_MASK-TAG_PRIMARY_BOXED))
@@ -204,12 +206,12 @@ _ET_DECLARE_CHECKED(int,is_boxed,Eterm)
 #define is_boxed(x)		(((x) & _TAG_PRIMARY_MASK) == TAG_PRIMARY_BOXED)
 #endif
 #define _unchecked_boxed_val(x) ((Eterm*) EXPAND_POINTER(((x) - TAG_PRIMARY_BOXED)))
-_ET_DECLARE_CHECKED(Eterm*,boxed_val,Eterm);
+_ET_DECLARE_CHECKED(Eterm*,boxed_val,Wterm)
 #define boxed_val(x)		_ET_APPLY(boxed_val,(x))
 
 /* cons cell ("list") access methods */
 #define _unchecked_make_list(x)	((Uint) COMPRESS_POINTER(x) + TAG_PRIMARY_LIST)
-_ET_DECLARE_CHECKED(Eterm,make_list,Eterm*);
+_ET_DECLARE_CHECKED(Eterm,make_list,Eterm*)
 #define make_list(x)		_ET_APPLY(make_list,(x))
 #if 1
 #define _unchecked_is_not_list(x) ((x) & (_TAG_PRIMARY_MASK-TAG_PRIMARY_LIST))
@@ -226,7 +228,7 @@ _ET_DECLARE_CHECKED(int,is_not_list,Eterm)
 #define _list_precond(x)       (is_list(x))
 #endif
 #define _unchecked_list_val(x) ((Eterm*) EXPAND_POINTER((x) - TAG_PRIMARY_LIST))
-_ET_DECLARE_CHECKED(Eterm*,list_val,Eterm);
+_ET_DECLARE_CHECKED(Eterm*,list_val,Wterm)
 #define list_val(x)		_ET_APPLY(list_val,(x))
 
 #define CONS(hp, car, cdr) \
@@ -240,6 +242,8 @@ _ET_DECLARE_CHECKED(Eterm*,list_val,Eterm);
 #define ptr_val(x)		_unchecked_ptr_val((x))	/*XXX*/
 #define _unchecked_offset_ptr(x,offs)	((x)+((offs)*sizeof(Eterm)))
 #define offset_ptr(x,offs)	_unchecked_offset_ptr(x,offs)	/*XXX*/
+#define _unchecked_byte_offset_ptr(x,byte_offs)	((x)+(offs))
+#define byte_offset_ptr(x,offs) _unchecked_byte_offset_ptr(x,offs)  /*XXX*/
 
 /* fixnum ("small") access methods */
 #if defined(ARCH_64) && !HALFWORD_HEAP
@@ -305,6 +309,7 @@ _ET_DECLARE_CHECKED(Uint,arityval,Eterm)
 
 /* thing access methods */
 #define is_thing(x)	(is_header((x)) && header_is_thing((x)))
+#define is_thing_ptr(t) (is_thing((t)->header))
 #define _unchecked_thing_arityval(x)	_unchecked_header_arity((x))
 _ET_DECLARE_CHECKED(Uint,thing_arityval,Eterm)
 #define thing_arityval(x)	_ET_APPLY(thing_arityval,(x))
@@ -339,7 +344,7 @@ _ET_DECLARE_CHECKED(Uint,thing_subtag,Eterm)
 #define is_binary(x)	(is_boxed((x)) && is_binary_header(*boxed_val((x))))
 #define is_not_binary(x) (!is_binary((x)))
 #define _unchecked_binary_val(x) _unchecked_boxed_val((x))
-_ET_DECLARE_CHECKED(Eterm*,binary_val,Eterm)
+_ET_DECLARE_CHECKED(Eterm*,binary_val,Wterm)
 #define binary_val(x)	_ET_APPLY(binary_val,(x))
 
 /* process binaries stuff (special case of binaries) */
@@ -356,7 +361,7 @@ _ET_DECLARE_CHECKED(Eterm*,binary_val,Eterm)
 #define is_fun(x)		(is_boxed((x)) && is_fun_header(*boxed_val((x))))
 #define is_not_fun(x)		(!is_fun((x)))
 #define _unchecked_fun_val(x)   _unchecked_boxed_val((x))
-_ET_DECLARE_CHECKED(Eterm*,fun_val,Eterm)
+_ET_DECLARE_CHECKED(Eterm*,fun_val,Wterm)
 #define fun_val(x)		_ET_APPLY(fun_val,(x))
 
 /* export access methods */
@@ -364,7 +369,7 @@ _ET_DECLARE_CHECKED(Eterm*,fun_val,Eterm)
 #define is_export(x)     (is_boxed((x)) && is_export_header(*boxed_val((x))))
 #define is_not_export(x) (!is_export((x)))
 #define _unchecked_export_val(x)   _unchecked_boxed_val(x)
-_ET_DECLARE_CHECKED(Eterm*,export_val,Eterm)
+_ET_DECLARE_CHECKED(Eterm*,export_val,Wterm)
 #define export_val(x)	_ET_APPLY(export_val,(x))
 #define is_export_header(x)	((x) == HEADER_EXPORT)
 #if HALFWORD_HEAP
@@ -391,7 +396,7 @@ _ET_DECLARE_CHECKED(Uint,bignum_header_arity,Eterm)
 #define is_big(x)	(is_boxed((x)) && _is_bignum_header(*boxed_val((x))))
 #define is_not_big(x)	(!is_big((x)))
 #define _unchecked_big_val(x)	_unchecked_boxed_val((x))
-_ET_DECLARE_CHECKED(Eterm*,big_val,Eterm)
+_ET_DECLARE_CHECKED(Eterm*,big_val,Wterm)
 #define big_val(x)		_ET_APPLY(big_val,(x))
 
 /* flonum ("float") access methods */
@@ -404,7 +409,7 @@ _ET_DECLARE_CHECKED(Eterm*,big_val,Eterm)
 #define is_float(x)	(is_boxed((x)) && *boxed_val((x)) == HEADER_FLONUM)
 #define is_not_float(x)	(!is_float(x))
 #define _unchecked_float_val(x)	_unchecked_boxed_val((x))
-_ET_DECLARE_CHECKED(Eterm*,float_val,Eterm)
+_ET_DECLARE_CHECKED(Eterm*,float_val,Wterm)
 #define float_val(x)	_ET_APPLY(float_val,(x))
 
 /* Float definition for byte and word access */
@@ -422,15 +427,16 @@ typedef union float_def
 } FloatDef;
 
 #if defined(ARCH_64) && !HALFWORD_HEAP
-#define GET_DOUBLE(x, f) (f).fdw = *(float_val(x)+1)
+
+#define FLOAT_VAL_GET_DOUBLE(fval, f) (f).fdw = *((fval)+1)
 
 #define PUT_DOUBLE(f, x)  *(x) = HEADER_FLONUM, \
                           *((x)+1) = (f).fdw
 #define GET_DOUBLE_DATA(p, f) (f).fdw = *((Uint *) (p))
 #define PUT_DOUBLE_DATA(f,p) *((Uint *) (p)) = (f).fdw
 #else
-#define GET_DOUBLE(x, f) (f).fw[0] = *(float_val(x)+1), \
-                         (f).fw[1] = *(float_val(x)+2)
+#define FLOAT_VAL_GET_DOUBLE(fval, f) (f).fw[0] = *((fval)+1), \
+				      (f).fw[1] = *((fval)+2)
 
 #define PUT_DOUBLE(f, x)  *(x) = HEADER_FLONUM, \
                           *((x)+1) = (f).fw[0], \
@@ -440,6 +446,9 @@ typedef union float_def
 #define PUT_DOUBLE_DATA(f,p) *((Uint *) (p)) = (f).fw[0],\
                              *(((Uint *) (p))+1) = (f).fw[1]
 #endif
+
+#define GET_DOUBLE(x, f) FLOAT_VAL_GET_DOUBLE(float_val(x), f)
+
 #define DOUBLE_DATA_WORDS (sizeof(ieee754_8)/sizeof(Eterm))
 #define FLOAT_SIZE_OBJECT (DOUBLE_DATA_WORDS+1)
 
@@ -451,7 +460,7 @@ typedef union float_def
    (is_boxed((x)) && *boxed_val((x)) == make_arityval((a)))
 #define is_not_tuple_arity(x, a) (!is_tuple_arity((x),(a)))
 #define _unchecked_tuple_val(x)	_unchecked_boxed_val(x)
-_ET_DECLARE_CHECKED(Eterm*,tuple_val,Eterm)
+_ET_DECLARE_CHECKED(Eterm*,tuple_val,Wterm)
 #define tuple_val(x)	_ET_APPLY(tuple_val,(x))
 
 #define TUPLE0(t) \
@@ -790,21 +799,24 @@ do {									\
   ((RefThing*) internal_ref_val(x))
 
 #define is_internal_ref(x) \
-  (_unchecked_is_boxed((x)) && is_ref_thing_header(*boxed_val((x))))
+    (_unchecked_is_boxed((x)) && is_ref_thing_header(*boxed_val((x))))
+
 #define is_not_internal_ref(x) \
   (!is_internal_ref((x)))
 
 #define _unchecked_internal_ref_val(x) _unchecked_boxed_val((x))
-_ET_DECLARE_CHECKED(Eterm*,internal_ref_val,Eterm)
+_ET_DECLARE_CHECKED(Eterm*,internal_ref_val,Wterm)
 #define internal_ref_val(x) _ET_APPLY(internal_ref_val,(x))
 
+#define internal_thing_ref_data_words(t) (thing_arityval(*(Eterm*)(t)))
 #define _unchecked_internal_ref_data_words(x) \
  (_unchecked_thing_arityval(*_unchecked_internal_ref_val(x)))
-_ET_DECLARE_CHECKED(Uint,internal_ref_data_words,Eterm)
+_ET_DECLARE_CHECKED(Uint,internal_ref_data_words,Wterm)
 #define internal_ref_data_words(x) _ET_APPLY(internal_ref_data_words,(x))
 
-#define _unchecked_internal_ref_data(x) (_unchecked_ref_thing_ptr(x)->data.ui32)
-_ET_DECLARE_CHECKED(Uint32*,internal_ref_data,Eterm)
+#define internal_thing_ref_data(thing) ((thing)->data.ui32)
+#define _unchecked_internal_ref_data(x) (internal_thing_ref_data(_unchecked_ref_thing_ptr(x)))
+_ET_DECLARE_CHECKED(Uint32*,internal_ref_data,Wterm)
 #define internal_ref_data(x) _ET_APPLY(internal_ref_data,(x))
 
 #define _unchecked_internal_ref_node(x) erts_this_node
@@ -889,14 +901,14 @@ typedef struct external_thing_ {
 #define is_external_header(x) \
   (((x) & (_TAG_HEADER_MASK-_BINARY_XXX_MASK)) == _TAG_HEADER_EXTERNAL_PID)
 
-#define is_external(x) \
-  (is_boxed((x)) && is_external_header(*boxed_val((x))))
+#define is_external(x) (is_boxed((x)) && is_external_header(*boxed_val((x))))
+
 #define is_external_pid(x) \
   (is_boxed((x)) && is_external_pid_header(*boxed_val((x))))
 #define is_external_port(x) \
-  (is_boxed((x)) && is_external_port_header(*boxed_val((x))))
-#define is_external_ref(x) \
-  (_unchecked_is_boxed((x)) && is_external_ref_header(*boxed_val((x))))
+    (is_boxed((x)) && is_external_port_header(*boxed_val((x))))
+
+#define is_external_ref(x) (_unchecked_is_boxed((x)) && is_external_ref_header(*boxed_val((x))))
 
 #define _unchecked_is_external(x) \
   (_unchecked_is_boxed((x)) && is_external_header(*_unchecked_boxed_val((x))))
@@ -914,17 +926,21 @@ typedef struct external_thing_ {
 #define make_external_ref		make_external
 
 #define _unchecked_external_val(x) _unchecked_boxed_val((x))
-_ET_DECLARE_CHECKED(Eterm*,external_val,Eterm)
+_ET_DECLARE_CHECKED(Eterm*,external_val,Wterm)
 #define external_val(x) _ET_APPLY(external_val,(x))
 
 #define external_thing_ptr(x) ((ExternalThing *) external_val((x)))
 #define _unchecked_external_thing_ptr(x) \
   ((ExternalThing *) _unchecked_external_val((x)))
 
+#define _unchecked_external_thing_data_words(thing) \
+    (_unchecked_thing_arityval((thing)->header) + (1 - EXTERNAL_THING_HEAD_SIZE))
+_ET_DECLARE_CHECKED(Uint,external_thing_data_words,ExternalThing*)
+#define external_thing_data_words(thing) _ET_APPLY(external_thing_data_words,(thing))
+
 #define _unchecked_external_data_words(x) \
-  (_unchecked_thing_arityval(_unchecked_external_thing_ptr((x))->header) \
-   + (1 - EXTERNAL_THING_HEAD_SIZE))
-_ET_DECLARE_CHECKED(Uint,external_data_words,Eterm)
+    _unchecked_external_thing_data_words(_unchecked_external_thing_ptr((x)))
+_ET_DECLARE_CHECKED(Uint,external_data_words,Wterm)
 #define external_data_words(x) _ET_APPLY(external_data_words,(x))
 
 #define _unchecked_external_data(x) (_unchecked_external_thing_ptr((x))->data.ui)
@@ -935,15 +951,15 @@ _ET_DECLARE_CHECKED(Uint,external_data_words,Eterm)
 
 #define _unchecked_external_pid_data_words(x) \
   _unchecked_external_data_words((x))
-_ET_DECLARE_CHECKED(Uint,external_pid_data_words,Eterm)
+_ET_DECLARE_CHECKED(Uint,external_pid_data_words,Wterm)
 #define external_pid_data_words(x) _ET_APPLY(external_pid_data_words,(x))
 
 #define _unchecked_external_pid_data(x) _unchecked_external_data((x))[0]
-_ET_DECLARE_CHECKED(Uint,external_pid_data,Eterm)
+_ET_DECLARE_CHECKED(Uint,external_pid_data,Wterm)
 #define external_pid_data(x) _ET_APPLY(external_pid_data,(x))
 
 #define _unchecked_external_pid_node(x) _unchecked_external_node((x))
-_ET_DECLARE_CHECKED(struct erl_node_*,external_pid_node,Eterm)
+_ET_DECLARE_CHECKED(struct erl_node_*,external_pid_node,Wterm)
 #define external_pid_node(x) _ET_APPLY(external_pid_node,(x))
 
 #define external_pid_number(x) _GET_PID_NUM(external_pid_data((x)))
@@ -951,27 +967,29 @@ _ET_DECLARE_CHECKED(struct erl_node_*,external_pid_node,Eterm)
 
 #define _unchecked_external_port_data_words(x) \
   _unchecked_external_data_words((x))
-_ET_DECLARE_CHECKED(Uint,external_port_data_words,Eterm)
+_ET_DECLARE_CHECKED(Uint,external_port_data_words,Wterm)
 #define external_port_data_words(x) _ET_APPLY(external_port_data_words,(x))
 
 #define _unchecked_external_port_data(x) _unchecked_external_data((x))[0]
-_ET_DECLARE_CHECKED(Uint,external_port_data,Eterm)
+_ET_DECLARE_CHECKED(Uint,external_port_data,Wterm)
 #define external_port_data(x) _ET_APPLY(external_port_data,(x))
 
 #define _unchecked_external_port_node(x) _unchecked_external_node((x))
-_ET_DECLARE_CHECKED(struct erl_node_*,external_port_node,Eterm)
+_ET_DECLARE_CHECKED(struct erl_node_*,external_port_node,Wterm)
 #define external_port_node(x) _ET_APPLY(external_port_node,(x))
 
 #define external_port_number(x) _GET_PORT_NUM(external_port_data((x)))
 
 #define _unchecked_external_ref_data_words(x) \
   _unchecked_external_data_words((x))
-_ET_DECLARE_CHECKED(Uint,external_ref_data_words,Eterm)
+_ET_DECLARE_CHECKED(Uint,external_ref_data_words,Wterm)
 #define external_ref_data_words(x) _ET_APPLY(external_ref_data_words,(x))
+#define external_thing_ref_data_words(thing) external_thing_data_words(thing)
 
 #define _unchecked_external_ref_data(x) (_unchecked_external_thing_ptr((x))->data.ui32)
-_ET_DECLARE_CHECKED(Uint32*,external_ref_data,Eterm)
+_ET_DECLARE_CHECKED(Uint32*,external_ref_data,Wterm)
 #define external_ref_data(x) _ET_APPLY(external_ref_data,(x))
+#define external_thing_ref_data(thing) ((thing)->data.ui32)
 
 #define _unchecked_external_ref_node(x) _unchecked_external_node((x))
 _ET_DECLARE_CHECKED(struct erl_node_*,external_ref_node,Eterm)
@@ -995,14 +1013,14 @@ _ET_DECLARE_CHECKED(struct erl_node_*,external_ref_node,Eterm)
 #endif
 
 #define _unchecked_make_cp(x)	((Eterm) COMPRESS_POINTER(x))
-_ET_DECLARE_CHECKED(Eterm,make_cp,BeamInstr*);
+_ET_DECLARE_CHECKED(Eterm,make_cp,BeamInstr*)
 #define make_cp(x)	_ET_APPLY(make_cp,(x))
 
 #define is_not_CP(x)	((x) & _CPMASK)
 #define is_CP(x)	(!is_not_CP(x))
 
 #define _unchecked_cp_val(x)	((BeamInstr*) EXPAND_POINTER(x))
-_ET_DECLARE_CHECKED(BeamInstr*,cp_val,Eterm);
+_ET_DECLARE_CHECKED(BeamInstr*,cp_val,Eterm)
 #define cp_val(x)	_ET_APPLY(cp_val,(x))
 
 #define make_catch(x)	(((x) << _TAG_IMMED2_SIZE) | _TAG_IMMED2_CATCH)
@@ -1083,10 +1101,10 @@ _ET_DECLARE_CHECKED(Uint,y_reg_index,Uint)
 #define SMALL_DEF		0xf
 
 #if ET_DEBUG
-extern unsigned tag_val_def_debug(Eterm, const char*, unsigned);
+extern unsigned tag_val_def_debug(Wterm, const char*, unsigned);
 #define tag_val_def(x)	tag_val_def_debug((x),__FILE__,__LINE__)
 #else
-extern unsigned tag_val_def(Eterm);
+extern unsigned tag_val_def(Wterm);
 #endif
 #define not_eq_tags(X,Y)	(tag_val_def((X)) ^ tag_val_def((Y)))
 
@@ -1102,5 +1120,81 @@ extern unsigned tag_val_def(Eterm);
 #define FLOAT_BIG 	_NUMBER_CODE(FLOAT_DEF,BIG_DEF)
 #define FLOAT_FLOAT	_NUMBER_CODE(FLOAT_DEF,FLOAT_DEF)
 
+#if HALFWORD_HEAP
+#define ptr2rel(PTR,BASE) ((Eterm*)((char*)(PTR) - (char*)(BASE)))
+#define rterm2wterm(REL,BASE) ((Wterm)(REL) + (Wterm)(BASE))
+
+#else /* HALFWORD_HEAP */
+
+#define ptr2rel(PTR,BASE) (PTR)
+#define rterm2wterm(REL,BASE) (REL)
+
+#endif /* !HALFWORD_HEAP */
+
+#define make_list_rel(PTR, BASE) make_list(ptr2rel(PTR,BASE))
+#define make_boxed_rel(PTR, BASE) make_boxed(ptr2rel(PTR,BASE))
+#define make_fun_rel make_boxed_rel
+#define make_binary_rel make_boxed_rel
+#define make_tuple_rel make_boxed_rel
+#define make_external_rel make_boxed_rel
+#define make_internal_ref_rel make_boxed_rel
+
+#define binary_val_rel(RTERM, BASE) binary_val(rterm2wterm(RTERM, BASE))
+#define list_val_rel(RTERM, BASE) list_val(rterm2wterm(RTERM, BASE))
+#define boxed_val_rel(RTERM, BASE) boxed_val(rterm2wterm(RTERM, BASE))
+#define tuple_val_rel(RTERM, BASE) tuple_val(rterm2wterm(RTERM, BASE))
+#define export_val_rel(RTERM, BASE) export_val(rterm2wterm(RTERM, BASE))
+#define fun_val_rel(RTERM, BASE) fun_val(rterm2wterm(RTERM, BASE))
+#define big_val_rel(RTERM,BASE)	big_val(rterm2wterm(RTERM,BASE))
+#define float_val_rel(RTERM,BASE) float_val(rterm2wterm(RTERM,BASE))
+#define internal_ref_val_rel(RTERM,BASE) internal_ref_val(rterm2wterm(RTERM,BASE))
+
+#define external_thing_ptr_rel(RTERM, BASE) external_thing_ptr(rterm2wterm(RTERM, BASE))
+#define external_data_words_rel(RTERM,BASE) external_data_words(rterm2wterm(RTERM,BASE))
+
+#define external_port_node_rel(RTERM,BASE) external_port_node(rterm2wterm(RTERM,BASE))
+#define external_port_data_rel(RTERM,BASE) external_port_data(rterm2wterm(RTERM,BASE))
+
+#define is_external_pid_rel(RTERM,BASE) is_external_pid(rterm2wterm(RTERM,BASE))
+#define external_pid_node_rel(RTERM,BASE) external_pid_node(rterm2wterm(RTERM,BASE))
+#define external_pid_data_rel(RTERM,BASE) external_pid_data(rterm2wterm(RTERM,BASE))
+
+#define is_binary_rel(RTERM,BASE) is_binary(rterm2wterm(RTERM,BASE))
+#define is_float_rel(RTERM,BASE) is_float(rterm2wterm(RTERM,BASE))
+#define is_fun_rel(RTERM,BASE) is_fun(rterm2wterm(RTERM,BASE))
+#define is_big_rel(RTERM,BASE) is_big(rterm2wterm(RTERM,BASE))
+#define is_export_rel(RTERM,BASE) is_export(rterm2wterm(RTERM,BASE))
+#define is_tuple_rel(RTERM,BASE) is_tuple(rterm2wterm(RTERM,BASE))
+
+#define GET_DOUBLE_REL(RTERM, f, BASE) GET_DOUBLE(rterm2wterm(RTERM,BASE), f)
+
+#define ref_thing_ptr_rel(RTERM,BASE) ref_thing_ptr(rterm2wterm(RTERM,BASE))
+#define is_internal_ref_rel(RTERM,BASE) is_internal_ref(rterm2wterm(RTERM,BASE))
+#define is_external_rel(RTERM,BASE) is_external(rterm2wterm(RTERM,BASE))
+#define is_external_port_rel(RTERM,BASE) is_external_port(rterm2wterm(RTERM,BASE))
+#define is_external_ref_rel(RTERM,BASE) is_external_ref(rterm2wterm(RTERM,BASE))
+
+#define external_node_rel(RTERM,BASE) external_node(rterm2wterm(RTERM,BASE))
+
+
+#if HALFWORD_HEAP
+ERTS_GLB_INLINE int is_same(Eterm a, Eterm* a_base, Eterm b, Eterm* b_base);
+
+#if ERTS_GLB_INLINE_INCL_FUNC_DEF
+ERTS_GLB_INLINE int is_same(Eterm a, Eterm* a_base, Eterm b, Eterm* b_base)
+{
+    /* If bases differ, assume a and b are on different "heaps",
+       ie can only be same if immed */
+    ASSERT(a_base == b_base || is_immed(a) || is_immed(b)
+	   || rterm2wterm(a,a_base) != rterm2wterm(b,b_base));
+
+    return a == b && (a_base == b_base || is_immed(a));
+}
+#endif
+
+#else /* !HALFWORD_HEAP */
+#define is_same(A,A_BASE,B,B_BASE) ((A)==(B))
+#endif
+
 #endif	/* __ERL_TERM_H */
 
diff --git a/erts/emulator/beam/erl_threads.h b/erts/emulator/beam/erl_threads.h
index 84a20b51f2..8c9cace0c5 100644
--- a/erts/emulator/beam/erl_threads.h
+++ b/erts/emulator/beam/erl_threads.h
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2001-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2001-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -36,6 +36,16 @@
 #include "erl_lock_count.h"
 #include "erl_term.h"
 
+#if defined(__GLIBC__) && (__GLIBC__ << 16) + __GLIBC_MINOR__ < (2 << 16) + 4
+/*
+ * pthread_mutex_destroy() may return EBUSY when it shouldn't :( We have
+ * only seen this bug in glibc versions before 2.4. Note that condition
+ * variables, rwmutexes, spinlocks, and rwspinlocks also may be effected by
+ * this bug since these implementations may use mutexes internally.
+ */
+#  define ERTS_THR_HAVE_BUSY_DESTROY_BUG
+#endif
+
 #define ERTS_THR_MEMORY_BARRIER ETHR_MEMORY_BARRIER
 
 #ifdef ERTS_ENABLE_LOCK_COUNT
@@ -175,6 +185,9 @@ typedef struct { int gcc_is_buggy; } erts_rwlock_t;
 #endif /* #ifdef USE_THREADS */
 
 #define ERTS_AINT_T_MAX (~(((erts_aint_t) 1) << (sizeof(erts_aint_t)*8-1)))
+#define ERTS_AINT_T_MIN ((((erts_aint_t) 1) << (sizeof(erts_aint_t)*8-1)))
+#define ERTS_AINT32_T_MAX (~(((erts_aint32_t) 1) << (sizeof(erts_aint32_t)*8-1)))
+#define ERTS_AINT32_T_MIN ((((erts_aint32_t) 1) << (sizeof(erts_aint32_t)*8-1)))
 
 ERTS_GLB_INLINE void erts_thr_init(erts_thr_init_data_t *id);
 ERTS_GLB_INLINE void erts_thr_late_init(erts_thr_late_init_data_t *id);
@@ -551,8 +564,16 @@ erts_mtx_destroy(erts_mtx_t *mtx)
     erts_lcnt_destroy_lock(&mtx->lcnt);
 #endif
     res = ethr_mutex_destroy(&mtx->mtx);
-    if (res)
+    if (res != 0) {
+#ifdef ERTS_THR_HAVE_BUSY_DESTROY_BUG
+	if (res == EBUSY) {
+	    char *warn = "Ignoring busy mutex destroy. "
+		"Most likely a bug in pthread implementation.";
+	    erts_send_warning_to_logger_str_nogl(warn);
+	}
+#endif
 	erts_thr_fatal_error(res, "destroy mutex");
+    }
 #endif
 }
 
@@ -647,8 +668,16 @@ erts_cnd_destroy(erts_cnd_t *cnd)
 {
 #ifdef USE_THREADS
     int res = ethr_cond_destroy(cnd);
-    if (res)
+    if (res != 0) {
+#ifdef ERTS_THR_HAVE_BUSY_DESTROY_BUG
+	if (res == EBUSY) {
+	    char *warn = "Ignoring busy cond destroy. "
+		"Most likely a bug in pthread implementation.";
+	    erts_send_warning_to_logger_str_nogl(warn);
+	}
+#endif
 	erts_thr_fatal_error(res, "destroy condition variable");
+    }
 #endif
 }
 
@@ -774,8 +803,16 @@ erts_rwmtx_destroy(erts_rwmtx_t *rwmtx)
     erts_lcnt_destroy_lock(&rwmtx->lcnt);
 #endif
     res = ethr_rwmutex_destroy(&rwmtx->rwmtx);
-    if (res != 0)
+    if (res != 0) {
+#ifdef ERTS_THR_HAVE_BUSY_DESTROY_BUG
+	if (res == EBUSY) {
+	    char *warn = "Ignoring busy rwmutex destroy. "
+		"Most likely a bug in pthread implementation.";
+	    erts_send_warning_to_logger_str_nogl(warn);
+	}
+#endif
 	erts_thr_fatal_error(res, "destroy rwmutex");
+    }
 #endif
 }
 
@@ -1452,8 +1489,16 @@ erts_spinlock_destroy(erts_spinlock_t *lock)
     erts_lcnt_destroy_lock(&lock->lcnt);
 #endif
     res = ethr_spinlock_destroy(&lock->slck);
-    if (res)
-	erts_thr_fatal_error(res, "destroy spinlock");
+    if (res != 0) {
+#ifdef ERTS_THR_HAVE_BUSY_DESTROY_BUG
+	if (res == EBUSY) {
+	    char *warn = "Ignoring busy spinlock destroy. "
+		"Most likely a bug in pthread implementation.";
+	    erts_send_warning_to_logger_str_nogl(warn);
+	}
+#endif
+	erts_thr_fatal_error(res, "destroy rwlock");
+    }
 #else
     (void)lock;
 #endif
@@ -1562,8 +1607,16 @@ erts_rwlock_destroy(erts_rwlock_t *lock)
     erts_lcnt_destroy_lock(&lock->lcnt);
 #endif
     res = ethr_rwlock_destroy(&lock->rwlck);
-    if (res)
+    if (res != 0) {
+#ifdef ERTS_THR_HAVE_BUSY_DESTROY_BUG
+	if (res == EBUSY) {
+	    char *warn = "Ignoring busy rwlock destroy. "
+		"Most likely a bug in pthread implementation.";
+	    erts_send_warning_to_logger_str_nogl(warn);
+	}
+#endif
 	erts_thr_fatal_error(res, "destroy rwlock");
+    }
 #else
     (void)lock;
 #endif
diff --git a/erts/emulator/beam/erl_time.h b/erts/emulator/beam/erl_time.h
index 6f6b971d34..93d8ea4cb4 100644
--- a/erts/emulator/beam/erl_time.h
+++ b/erts/emulator/beam/erl_time.h
@@ -20,11 +20,15 @@
 #ifndef ERL_TIME_H__
 #define ERL_TIME_H__
 
+extern erts_smp_atomic_t do_time;	/* set at clock interrupt */
+extern SysTimeval erts_first_emu_time;
+
 /*
 ** Timer entry:
 */
 typedef struct erl_timer {
     struct erl_timer* next;	/* next entry tiw slot or chain */
+    struct erl_timer* prev;	/* prev entry tiw slot or chain */
     Uint slot;			/* slot in timer wheel */
     Uint count;			/* number of loops remaining */
     int    active;		/* 1=activated, 0=deactivated */
@@ -39,7 +43,6 @@ typedef void (*ErlTimeoutProc)(void*);
 typedef void (*ErlCancelProc)(void*);
 
 #ifdef ERTS_SMP
-
 /*
  * Process and port timer
  */
@@ -61,7 +64,66 @@ void erts_create_smp_ptimer(ErtsSmpPTimer **timer_ref,
 			    ErlTimeoutProc timeout_func,
 			    Uint timeout);
 void erts_cancel_smp_ptimer(ErtsSmpPTimer *ptimer);
+#endif
+
+/* timer-wheel api */
 
+void erts_init_time(void);
+void erts_set_timer(ErlTimer*, ErlTimeoutProc, ErlCancelProc, void*, Uint);
+void erts_cancel_timer(ErlTimer*);
+void erts_bump_timer(erts_aint_t);
+Uint erts_timer_wheel_memory_size(void);
+Uint erts_time_left(ErlTimer *);
+erts_aint_t erts_next_time(void);
+
+#ifdef DEBUG
+void erts_p_slpq(void);
 #endif
 
+ERTS_GLB_INLINE erts_aint_t erts_do_time_read_and_reset(void);
+ERTS_GLB_INLINE void erts_do_time_add(long);
+
+#if ERTS_GLB_INLINE_INCL_FUNC_DEF
+
+ERTS_GLB_INLINE erts_aint_t erts_do_time_read_and_reset(void) { return erts_smp_atomic_xchg(&do_time, 0L); }
+ERTS_GLB_INLINE void erts_do_time_add(long elapsed) { erts_smp_atomic_add(&do_time, elapsed); }
+
+#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */
+
+
+/* time_sup */
+
+#if (defined(HAVE_GETHRVTIME) || defined(HAVE_CLOCK_GETTIME))
+#  ifndef HAVE_ERTS_NOW_CPU
+#    define HAVE_ERTS_NOW_CPU
+#    ifdef HAVE_GETHRVTIME
+#      define erts_start_now_cpu() sys_start_hrvtime()
+#      define erts_stop_now_cpu()  sys_stop_hrvtime()
+#    endif
+#  endif
+void erts_get_now_cpu(Uint* megasec, Uint* sec, Uint* microsec);
 #endif
+
+void erts_get_timeval(SysTimeval *tv);
+long erts_get_time(void);
+void erts_get_emu_time(SysTimeval *);
+
+ERTS_GLB_INLINE int erts_cmp_timeval(SysTimeval *t1p, SysTimeval *t2p);
+
+#if ERTS_GLB_INLINE_INCL_FUNC_DEF
+
+ERTS_GLB_INLINE int
+erts_cmp_timeval(SysTimeval *t1p, SysTimeval *t2p)
+{
+    if (t1p->tv_sec == t2p->tv_sec) {
+	if (t1p->tv_usec < t2p->tv_usec)
+	    return -1;
+	else if (t1p->tv_usec > t2p->tv_usec)
+	    return 1;
+	return 0;
+    }
+    return t1p->tv_sec < t2p->tv_sec ? -1 : 1;
+}
+
+#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */
+#endif /* ERL_TIME_H__ */
diff --git a/erts/emulator/beam/erl_time_sup.c b/erts/emulator/beam/erl_time_sup.c
index 7b8706ea13..ca4b54188e 100644
--- a/erts/emulator/beam/erl_time_sup.c
+++ b/erts/emulator/beam/erl_time_sup.c
@@ -358,10 +358,6 @@ static int clock_resolution;
 ** instead of something like select.
 */
 
-#if defined(ERTS_TIMER_THREAD)
-static ERTS_INLINE void init_erts_deliver_time(const SysTimeval *inittv) { }
-static ERTS_INLINE void do_erts_deliver_time(const SysTimeval *current) { }
-#else
 static SysTimeval last_delivered; 
 
 static void init_erts_deliver_time(const SysTimeval *inittv)
@@ -389,11 +385,10 @@ static void do_erts_deliver_time(const SysTimeval *current)
        this by simply pretend as if the time stood still. :) */
 
     if (elapsed > 0) {
-	do_time_add(elapsed);
+	erts_do_time_add(elapsed);
 	last_delivered = cur_time;
     }
 }
-#endif
 
 int 
 erts_init_time_sup(void)
@@ -786,7 +781,6 @@ get_sys_now(Uint* megasec, Uint* sec, Uint* microsec)
    to a struct timeval representing current time (to save
    a gettimeofday() where possible) or NULL */
 
-#if !defined(ERTS_TIMER_THREAD)
 void erts_deliver_time(void) {
     SysTimeval now;
     
@@ -797,7 +791,6 @@ void erts_deliver_time(void) {
     
     erts_smp_mtx_unlock(&erts_timeofday_mtx);
 }
-#endif
 
 /* get *real* time (not ticks) remaining until next timeout - if there
    isn't one, give a "long" time, that is guaranteed
@@ -806,14 +799,12 @@ void erts_deliver_time(void) {
 void erts_time_remaining(SysTimeval *rem_time)
 {
     int ticks;
-#if !defined(ERTS_TIMER_THREAD)
     SysTimeval cur_time;
-#endif
     long elapsed;
 
-    /* next_time() returns no of ticks to next timeout or -1 if none */
+    /* erts_next_time() returns no of ticks to next timeout or -1 if none */
 
-    if ((ticks = next_time()) == -1) {
+    if ((ticks = erts_next_time()) == -1) {
 	/* timer queue empty */
 	/* this will cause at most 100000000 ticks */
 	rem_time->tv_sec = 100000;
@@ -822,9 +813,6 @@ void erts_time_remaining(SysTimeval *rem_time)
 	/* next timeout after ticks ticks */
 	ticks *= CLOCK_RESOLUTION;
 	
-#if defined(ERTS_TIMER_THREAD)
-	elapsed = 0;
-#else
 	erts_smp_mtx_lock(&erts_timeofday_mtx);
 	
 	get_tolerant_timeofday(&cur_time);
@@ -839,7 +827,6 @@ void erts_time_remaining(SysTimeval *rem_time)
 	    rem_time->tv_sec = rem_time->tv_usec = 0;
 	    return;
 	}
-#endif
 	rem_time->tv_sec = (ticks - elapsed) / 1000;
 	rem_time->tv_usec = 1000 * ((ticks - elapsed) % 1000);
     }
diff --git a/erts/emulator/beam/erl_trace.c b/erts/emulator/beam/erl_trace.c
index 3043bb1e8c..c0397ca6c3 100644
--- a/erts/emulator/beam/erl_trace.c
+++ b/erts/emulator/beam/erl_trace.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1999-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1999-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -1668,7 +1668,7 @@ erts_call_trace(Process* p, BeamInstr mfa[3], Binary *match_spec,
 	return_flags = 0;
 	if (match_spec) {
 	    pam_result = erts_match_set_run(p, match_spec, args, arity,
-					    &return_flags);
+					    ERTS_PAM_TMP_RESULT, &return_flags);
 	    if (is_non_value(pam_result)) {
 		erts_match_set_release_result(p);
 #if !HEAP_ON_C_STACK
@@ -1815,7 +1815,7 @@ erts_call_trace(Process* p, BeamInstr mfa[3], Binary *match_spec,
 	return_flags = 0;
 	if (match_spec) {
 	    pam_result = erts_match_set_run(p, match_spec, args, arity,
-					    &return_flags);
+					    ERTS_PAM_TMP_RESULT, &return_flags);
 	    if (is_non_value(pam_result)) {
 		erts_match_set_release_result(p);
 		UnUseTmpHeap(ERL_SUB_BIN_SIZE,p);
diff --git a/erts/emulator/beam/erl_vm.h b/erts/emulator/beam/erl_vm.h
index 48fa99934e..e7fd144ec3 100644
--- a/erts/emulator/beam/erl_vm.h
+++ b/erts/emulator/beam/erl_vm.h
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -47,7 +47,7 @@
 #define SEQ_TRACE 1
 
 #define CONTEXT_REDS 2000	/* Swap process out after this number */
-#define MAX_ARG 256	        /* Max number of arguments allowed */
+#define MAX_ARG 255	        /* Max number of arguments allowed */
 #define MAX_REG 1024            /* Max number of x(N) registers used */
 
 /* Scheduler stores data for temporary heaps if
@@ -120,14 +120,15 @@
  * Allocate heap memory, first on the ordinary heap;
  * failing that, in a heap fragment.
  */
-#define HAlloc(p, sz)			                              \
+#define HAllocX(p, sz, xtra)		                              \
     (ASSERT_EXPR((sz) >= 0),					      \
      ErtsHAllocLockCheck(p),					      \
      (IS_FORCE_HEAP_FRAGS || (((HEAP_LIMIT(p) - HEAP_TOP(p)) < (sz))) \
-      ? erts_heap_alloc((p),(sz))                                     \
+      ? erts_heap_alloc((p),(sz),(xtra))                              \
       : (INIT_HEAP_MEM(p,sz),		                              \
          HEAP_TOP(p) = HEAP_TOP(p) + (sz), HEAP_TOP(p) - (sz))))
 
+#define HAlloc(P, SZ) HAllocX(P,SZ,0)
 
 #define HRelease(p, endp, ptr)					\
   if ((ptr) == (endp)) {					\
diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h
index c948af14ae..bd540eaaa6 100644
--- a/erts/emulator/beam/global.h
+++ b/erts/emulator/beam/global.h
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -890,9 +890,31 @@ void erl_error(char*, va_list);
 /* copy.c */
 void init_copy(void);
 Eterm copy_object(Eterm, Process*);
+
+#if HALFWORD_HEAP
+Uint size_object_rel(Eterm, Eterm*);
+#  define size_object(A) size_object_rel(A,NULL)
+
+Eterm copy_struct_rel(Eterm, Uint, Eterm**, ErlOffHeap*, Eterm* src_base, Eterm* dst_base);
+#  define copy_struct(OBJ,SZ,HPP,OH) copy_struct_rel(OBJ,SZ,HPP,OH, NULL,NULL)
+
+Eterm copy_shallow_rel(Eterm*, Uint, Eterm**, ErlOffHeap*, Eterm* src_base);
+#  define copy_shallow(A,B,C,D) copy_shallow_rel(A,B,C,D,NULL)
+
+#else /* !HALFWORD_HEAP */
+
 Uint size_object(Eterm);
+#  define size_object_rel(A,B) size_object(A)
+
 Eterm copy_struct(Eterm, Uint, Eterm**, ErlOffHeap*);
+#  define copy_struct_rel(OBJ,SZ,HPP,OH, SB,DB) copy_struct(OBJ,SZ,HPP,OH)
+
 Eterm copy_shallow(Eterm*, Uint, Eterm**, ErlOffHeap*);
+#  define copy_shallow_rel(A,B,C,D, BASE) copy_shallow(A,B,C,D)
+
+#endif
+
+
 void move_multi_frags(Eterm** hpp, ErlOffHeap*, ErlHeapFragment* first,
 		      Eterm* refs, unsigned nrefs);
 
@@ -1425,84 +1447,6 @@ void erl_drv_thr_init(void);
 
 /* time.c */
 
-ERTS_GLB_INLINE erts_aint_t do_time_read_and_reset(void);
-#ifdef ERTS_TIMER_THREAD
-ERTS_GLB_INLINE int next_time(void);
-ERTS_GLB_INLINE void bump_timer(erts_aint_t);
-#else
-erts_aint_t next_time(void);
-void bump_timer(erts_aint_t);
-extern erts_smp_atomic_t do_time;	/* set at clock interrupt */
-ERTS_GLB_INLINE void do_time_add(erts_aint_t);
-#endif
-
-#if ERTS_GLB_INLINE_INCL_FUNC_DEF
-
-#ifdef ERTS_TIMER_THREAD
-ERTS_GLB_INLINE erts_aint_t do_time_read_and_reset(void) { return 0; }
-ERTS_GLB_INLINE erts_aint_t next_time(void) { return -1; }
-ERTS_GLB_INLINE void bump_timer(erts_aint_t ignore) { }
-#else
-ERTS_GLB_INLINE erts_aint_t do_time_read_and_reset(void)
-{
-    return erts_smp_atomic_xchg(&do_time, 0L);
-}
-ERTS_GLB_INLINE void do_time_add(erts_aint_t elapsed)
-{
-    erts_smp_atomic_add(&do_time, elapsed);
-}
-#endif
-
-#endif /* #if ERTS_GLB_INLINE_INCL_FUNC_DEF */
-
-void init_time(void);
-void erl_set_timer(ErlTimer*, ErlTimeoutProc, ErlCancelProc, void*, Uint);
-void erl_cancel_timer(ErlTimer*);
-Uint time_left(ErlTimer *);
-
-Uint erts_timer_wheel_memory_size(void);
-
-#if (defined(HAVE_GETHRVTIME) || defined(HAVE_CLOCK_GETTIME))
-#  ifndef HAVE_ERTS_NOW_CPU
-#    define HAVE_ERTS_NOW_CPU
-#    ifdef HAVE_GETHRVTIME
-#      define erts_start_now_cpu() sys_start_hrvtime()
-#      define erts_stop_now_cpu()  sys_stop_hrvtime()
-#    endif
-#  endif
-void erts_get_now_cpu(Uint* megasec, Uint* sec, Uint* microsec);
-#endif
-
-void erts_get_timeval(SysTimeval *tv);
-long erts_get_time(void);
-
-extern SysTimeval erts_first_emu_time;
-
-void erts_get_emu_time(SysTimeval *);
-
-ERTS_GLB_INLINE int erts_cmp_timeval(SysTimeval *t1p, SysTimeval *t2p);
-
-#if ERTS_GLB_INLINE_INCL_FUNC_DEF
-
-ERTS_GLB_INLINE int
-erts_cmp_timeval(SysTimeval *t1p, SysTimeval *t2p)
-{
-    if (t1p->tv_sec == t2p->tv_sec) {
-	if (t1p->tv_usec < t2p->tv_usec)
-	    return -1;
-	else if (t1p->tv_usec > t2p->tv_usec)
-	    return 1;
-	return 0;
-    }
-    return t1p->tv_sec < t2p->tv_sec ? -1 : 1;
-}
-
-#endif
-
-#ifdef DEBUG
-void p_slpq(void);
-#endif
-
 /* utils.c */
 
 /*
@@ -1561,16 +1505,30 @@ void erts_init_utils_mem(void);
 erts_dsprintf_buf_t *erts_create_tmp_dsbuf(Uint);
 void erts_destroy_tmp_dsbuf(erts_dsprintf_buf_t *);
 
+#if HALFWORD_HEAP
+int eq_rel(Eterm a, Eterm* a_base, Eterm b, Eterm* b_base);
+#  define eq(A,B) eq_rel(A,NULL,B,NULL)
+#else
 int eq(Eterm, Eterm);
+#  define eq_rel(A,A_BASE,B,B_BASE) eq(A,B)
+#endif
+
 #define EQ(x,y) (((x) == (y)) || (is_not_both_immed((x),(y)) && eq((x),(y))))
 
+#if HALFWORD_HEAP
+Sint cmp_rel(Eterm, Eterm*, Eterm, Eterm*);
+#define CMP(A,B) cmp_rel(A,NULL,B,NULL)
+#else
 Sint cmp(Eterm, Eterm);
-#define cmp_lt(a,b)	(cmp((a),(b)) < 0)
-#define cmp_le(a,b)	(cmp((a),(b)) <= 0)
-#define cmp_eq(a,b)	(cmp((a),(b)) == 0)
-#define cmp_ne(a,b)	(cmp((a),(b)) != 0)
-#define cmp_ge(a,b)	(cmp((a),(b)) >= 0)
-#define cmp_gt(a,b)	(cmp((a),(b)) > 0)
+#define cmp_rel(A,A_BASE,B,B_BASE) cmp(A,B)
+#define CMP(A,B) cmp(A,B)
+#endif
+#define cmp_lt(a,b)	(CMP((a),(b)) < 0)
+#define cmp_le(a,b)	(CMP((a),(b)) <= 0)
+#define cmp_eq(a,b)	(CMP((a),(b)) == 0)
+#define cmp_ne(a,b)	(CMP((a),(b)) != 0)
+#define cmp_ge(a,b)	(CMP((a),(b)) >= 0)
+#define cmp_gt(a,b)	(CMP((a),(b)) > 0)
 
 #define CMP_LT(a,b)	((a) != (b) && cmp_lt((a),(b)))
 #define CMP_GE(a,b)	((a) == (b) || cmp_ge((a),(b)))
@@ -1799,8 +1757,15 @@ do {								\
 extern Binary *erts_match_set_compile(Process *p, Eterm matchexpr);
 Eterm erts_match_set_lint(Process *p, Eterm matchexpr); 
 extern void erts_match_set_release_result(Process* p);
+
+enum erts_pam_run_flags {
+    ERTS_PAM_TMP_RESULT=0,
+    ERTS_PAM_COPY_RESULT=1,
+    ERTS_PAM_CONTIGUOUS_TUPLE=2
+};
 extern Eterm erts_match_set_run(Process *p, Binary *mpsp, 
 				Eterm *args, int num_args,
+				enum erts_pam_run_flags in_flags,
 				Uint32 *return_flags);
 extern Eterm erts_match_set_get_source(Binary *mpsp);
 extern void erts_match_prog_foreach_offheap(Binary *b,
diff --git a/erts/emulator/beam/io.c b/erts/emulator/beam/io.c
index f6c6a01fb2..f21a96c754 100644
--- a/erts/emulator/beam/io.c
+++ b/erts/emulator/beam/io.c
@@ -670,7 +670,7 @@ erts_open_driver(erts_driver_t* driver,	/* Pointer to driver. */
 #ifdef ERTS_SMP
 	erts_cancel_smp_ptimer(port->ptimer);
 #else
-	erl_cancel_timer(&(port->tm));
+	erts_cancel_timer(&(port->tm));
 #endif
 	stopq(port);
 	kill_port(port);
@@ -1839,7 +1839,7 @@ terminate_port(Port *prt)
 #ifdef ERTS_SMP
     erts_cancel_smp_ptimer(prt->ptimer);
 #else
-    erl_cancel_timer(&prt->tm);
+    erts_cancel_timer(&prt->tm);
 #endif
 
     drv = prt->drv_ptr;
@@ -4068,7 +4068,7 @@ drv_cancel_timer(Port *prt)
 #ifdef ERTS_SMP
     erts_cancel_smp_ptimer(prt->ptimer);
 #else
-    erl_cancel_timer(&prt->tm);
+    erts_cancel_timer(&prt->tm);
 #endif
     if (erts_port_task_is_scheduled(&prt->timeout_task))
 	erts_port_task_abort(prt->id, &prt->timeout_task);
@@ -4092,7 +4092,7 @@ int driver_set_timer(ErlDrvPort ix, UWord t)
 			   (ErlTimeoutProc) schedule_port_timeout,
 			   t);
 #else
-    erl_set_timer(&prt->tm,
+    erts_set_timer(&prt->tm,
 		  (ErlTimeoutProc) schedule_port_timeout,
 		  NULL,
 		  prt,
@@ -4123,9 +4123,9 @@ driver_read_timer(ErlDrvPort ix, unsigned long* t)
 	return -1;
     ERTS_SMP_LC_ASSERT(erts_lc_is_port_locked(prt));
 #ifdef ERTS_SMP
-    *t = prt->ptimer ? time_left(&prt->ptimer->timer.tm) : 0;
+    *t = prt->ptimer ? erts_time_left(&prt->ptimer->timer.tm) : 0;
 #else
-    *t = time_left(&prt->tm);
+    *t = erts_time_left(&prt->tm);
 #endif
     return 0;
 }
diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab
index a2439d5582..e861f97e7a 100644
--- a/erts/emulator/beam/ops.tab
+++ b/erts/emulator/beam/ops.tab
@@ -101,16 +101,16 @@ return
 %macro: test_heap TestHeap -pack
 
 allocate t t
-allocate_heap I I I
+allocate_heap t I t
 deallocate I
 init y
 allocate_zero t t
-allocate_heap_zero I I I
+allocate_heap_zero t I t
 
 trim N Remaining => i_trim N
 i_trim I
 
-test_heap I I
+test_heap I t
 
 allocate_heap S u==0 R => allocate S R
 allocate_heap_zero S u==0 R => allocate_zero S R
@@ -124,7 +124,7 @@ init Y1 | init Y2 => init2 Y1 Y2
 
 # Selecting values
 
-select_val S=q Fail=f Size=u Rest=* => const_select_val(S, Fail, Size, Rest)
+select_val S=aiq Fail=f Size=u Rest=* => const_select_val(S, Fail, Size, Rest)
 
 select_val S=s Fail=f Size=u Rest=* | use_jump_tab(Size, Rest) => \
   gen_jump_tab(S, Fail, Size, Rest)
@@ -132,34 +132,59 @@ select_val S=s Fail=f Size=u Rest=* | use_jump_tab(Size, Rest) => \
 is_integer Fail=f S | select_val S=s Fail=f Size=u Rest=* | use_jump_tab(Size, Rest) => \
   gen_jump_tab(S, Fail, Size, Rest)
 
+is_integer TypeFail=f S | select_val S=s Fail=f Size=u Rest=* | \
+	   mixed_types(Size, Rest) => \
+  gen_split_values(S, TypeFail, Fail, Size, Rest)
+
 select_val S=s Fail=f Size=u Rest=* | mixed_types(Size, Rest) => \
-  gen_split_values(S, Fail, Size, Rest)
+  gen_split_values(S, Fail, Fail, Size, Rest)
 
-is_integer Fail=f S | select_val S=s Fail=f Size=u Rest=* | \
+is_integer Fail=f S | select_val S=d Fail=f Size=u Rest=* | \
   fixed_size_values(Size, Rest) => gen_select_val(S, Fail, Size, Rest)
 
-is_atom Fail=f S | select_val S=s Fail=f Size=u Rest=* | \
+is_atom Fail=f S | select_val S=d Fail=f Size=u Rest=* | \
   fixed_size_values(Size, Rest) => gen_select_val(S, Fail, Size, Rest)
 
-select_val S=s Fail=f Size=u Rest=* | fixed_size_values(Size, Rest) => \
-  gen_select_val(S, Fail, Size, Rest)
+select_val S=s Fail=f Size=u Rest=* | floats_or_bignums(Size, Rest) => \
+  gen_select_literals(S, Fail, Size, Rest)
 
-select_val S=s Fail=f Size=u Rest=* | all_values_are_big(Size, Rest) => \
-  gen_select_big(S, Fail, Size, Rest)
+select_val S=d Fail=f Size=u Rest=* | fixed_size_values(Size, Rest) => \
+  gen_select_val(S, Fail, Size, Rest)
 
-is_tuple Fail=f S | select_tuple_arity S=s Fail=f Size=u Rest=* => \
+is_tuple Fail=f S | select_tuple_arity S=d Fail=f Size=u Rest=* => \
   gen_select_tuple_arity(S, Fail, Size, Rest)
 
-select_tuple_arity S=s Fail=f Size=u Rest=* => \
+select_tuple_arity S=d Fail=f Size=u Rest=* => \
   gen_select_tuple_arity(S, Fail, Size, Rest)
 
-i_select_val s f I
-i_select_tuple_arity s f I
-i_select_big s f
-i_select_float s f I
+i_select_val r f I
+i_select_val x f I
+i_select_val y f I
+
+i_select_val2 r f c f c f
+i_select_val2 x f c f c f
+i_select_val2 y f c f c f
+
+i_select_tuple_arity2 r f A f A f
+i_select_tuple_arity2 x f A f A f
+i_select_tuple_arity2 y f A f A f
+
+i_select_tuple_arity r f I
+i_select_tuple_arity x f I
+i_select_tuple_arity y f I
+
+i_jump_on_val_zero r f I
+i_jump_on_val_zero x f I
+i_jump_on_val_zero y f I
+
+i_jump_on_val r f I I
+i_jump_on_val x f I I
+i_jump_on_val y f I I
 
-i_jump_on_val_zero s f I
-i_jump_on_val s f I I
+jump Target | label Lbl | same_label(Target, Lbl) => label Lbl
+
+is_ne_exact L1 S1 S2 | jump Fail | label L2 | same_label(L1, L2) => \
+  is_eq_exact Fail S1 S2 | label L2
 
 %macro: get_list GetList -pack
 get_list x x x
@@ -234,11 +259,17 @@ is_number Fail Literal=q => move Literal x | is_number Fail x
 
 jump f
 
-case_end Literal=q => move Literal x | case_end x
-badmatch Literal=q => move Literal x | badmatch x
+case_end Literal=cq => move Literal x | case_end x
+badmatch Literal=cq => move Literal x | badmatch x
+
+case_end r
+case_end x
+case_end y
+
+badmatch r
+badmatch x
+badmatch y
 
-case_end s
-badmatch s
 if_end
 raise s s
 
@@ -248,12 +279,33 @@ system_limit j
 
 move R R =>
 
+move C=cxy r | jump Lbl => move_jump Lbl C
+
+%macro: move_jump MoveJump -nonext
+move_jump f n
+move_jump f c
+move_jump f x
+move_jump f y
+
 move X1=x Y1=y | move X2=x Y2=y => move2 X1 Y1 X2 Y2
 move Y1=y X1=x | move Y2=y X2=x => move2 Y1 X1 Y2 X2
+move X1=x X2=x | move X3=x X4=x => move2 X1 X2 X3 X4
+
+move C=aiq X=x==1 => move_x1 C
+move C=aiq X=x==2 => move_x2 C
+
+move_x1 c
+move_x2 c
 
 %macro: move2 Move2 -pack
 move2 x y x y
 move2 y x y x
+move2 x x x x
+
+# The compiler almost never generates a "move Literal y(Y)" instruction,
+# so let's cheat if we encounter one.
+move S=n D=y => init D
+move S=c D=y => move S x | move x D
 
 %macro:move Move -pack -gen_dest
 move x x
@@ -265,15 +317,10 @@ move r x
 move r y
 move c r
 move c x
-move c y
 move n x
 move n r
 move y y
 
-%cold
-move s d
-%hot
-
 # Receive operations.
 
 loop_rec Fail Src | smp_mark_target_label(Fail) => i_loop_rec Fail Src
@@ -306,55 +353,78 @@ i_wait_error_locked
 send
 
 #
-# Comparisions.
+# Optimized comparisons with one immediate/literal operand.
+#
+
+is_eq_exact Lbl R=rxy C=ian => i_is_eq_exact_immed Lbl R C
+is_eq_exact Lbl R=rxy C=q => i_is_eq_exact_literal R Lbl C
+
+is_ne_exact Lbl R=rxy C=ian => i_is_ne_exact_immed Lbl R C
+is_ne_exact Lbl R=rxy C=q => i_is_ne_exact_literal R Lbl C
+
+%macro: i_is_eq_exact_immed EqualImmed -fail_action
+i_is_eq_exact_immed f r c
+i_is_eq_exact_immed f x c
+i_is_eq_exact_immed f y c
+
+i_is_eq_exact_literal r f c
+i_is_eq_exact_literal x f c
+i_is_eq_exact_literal y f c
+
+%macro: i_is_ne_exact_immed NotEqualImmed -fail_action
+i_is_ne_exact_immed f r c
+i_is_ne_exact_immed f x c
+i_is_ne_exact_immed f y c
+
+i_is_ne_exact_literal r f c
+i_is_ne_exact_literal x f c
+i_is_ne_exact_literal y f c
+
+#
+# All other comparisons.
 #
 
-is_eq_exact Lbl=f R=rxy C=ian => i_is_eq_immed Lbl R C
-is_eq Lbl=f R=rxy C=an => i_is_eq_immed Lbl R C
+is_eq_exact Lbl S1 S2 => i_fetch S1 S2 | i_is_eq_exact Lbl
+is_ne_exact Lbl S1 S2 => i_fetch S1 S2 | i_is_ne_exact Lbl
 
 is_ge Lbl S1 S2 => i_fetch S1 S2 | i_is_ge Lbl
 is_lt Lbl S1 S2 => i_fetch S1 S2 | i_is_lt Lbl
 is_eq Lbl S1 S2 => i_fetch S1 S2 | i_is_eq Lbl
 is_ne Lbl S1 S2 => i_fetch S1 S2 | i_is_ne Lbl
 
-is_eq_exact Lbl=f S1 S2 => i_fetch S1 S2 | i_is_eq_exact Lbl
-is_ne_exact Lbl S1 S2 => i_fetch S1 S2 | i_is_ne_exact Lbl
-
+i_is_eq_exact f
+i_is_ne_exact f
 i_is_lt f
 i_is_ge f
 i_is_eq f
 i_is_ne f
-i_is_eq_exact f
-i_is_ne_exact f
-
-%macro: i_is_eq_immed EqualImmed -fail_action
-i_is_eq_immed f r c
-i_is_eq_immed f x c
-i_is_eq_immed f y c
 
 #
 # Putting things.
 #
 
-put_tuple Arity Dst | put V => i_put_tuple Arity V Dst
+put_tuple Arity Dst => i_put_tuple Dst u
 
-%macro: i_put_tuple PutTuple -pack
-i_put_tuple A x x
-i_put_tuple A y x
-i_put_tuple A r x
-i_put_tuple A n x
-i_put_tuple A c x
-i_put_tuple A x y
-i_put_tuple A x r
-i_put_tuple A y r
-i_put_tuple A n r
-i_put_tuple A c r
+i_put_tuple Dst Arity Puts=* | put S1 | put S2 | \
+  put S3 | put S4 | put S5 => \
+	    tuple_append_put5(Arity, Dst, Puts, S1, S2, S3, S4, S5)
 
-%cold
-i_put_tuple A r y
-i_put_tuple A y y
-i_put_tuple A c y
-%hot
+i_put_tuple Dst Arity Puts=* | put S => \
+	    tuple_append_put(Arity, Dst, Puts, S)
+
+i_put_tuple/2
+
+%macro:i_put_tuple PutTuple -pack -goto:do_put_tuple
+i_put_tuple r I
+i_put_tuple x I
+i_put_tuple y I
+
+#
+# The instruction "put_list Const [] Dst" will not be generated by
+# the current BEAM compiler. But until R15A, play it safe by handling
+# that instruction with the following transformation.
+#
+put_list Const=c n Dst => move Const x | put_list x n Dst
 
 %macro:put_list PutList -pack -gen_dest
 
@@ -362,10 +432,8 @@ put_list x n x
 put_list y n x
 put_list x x x
 put_list y x x
-put_list c n x
 put_list x x r
 put_list y r r
-put_list c n r
 
 put_list y y x
 put_list x y x
@@ -376,6 +444,13 @@ put_list y y r
 put_list y r x
 put_list r n x
 
+put_list x r x
+put_list x y r
+put_list y x r
+put_list y x x
+
+put_list x r r
+
 # put_list SrcReg Constant Dst
 put_list r c r
 put_list r c x
@@ -403,17 +478,9 @@ put_list c y x
 put_list c y y
 
 %cold
-put_list x r r
 put_list s s d
 %hot
 
-%macro: put Put
-put x
-put r
-put y
-put c
-put n
-
 %macro: i_fetch FetchArgs -pack
 i_fetch c c
 i_fetch c r
@@ -464,19 +531,20 @@ move_return n r
 
 move S r | deallocate D | return => move_deallocate_return S r D
 
-%macro: move_deallocate_return MoveDeallocateReturn -nonext
-move_deallocate_return x r P
-move_deallocate_return y r P
-move_deallocate_return c r P
-move_deallocate_return n r P
+%macro: move_deallocate_return MoveDeallocateReturn -pack -nonext
+move_deallocate_return x r Q
+move_deallocate_return y r Q
+move_deallocate_return c r Q
+move_deallocate_return n r Q
 
 deallocate D | return => deallocate_return D
 
 %macro: deallocate_return DeallocateReturn -nonext
-deallocate_return P
+deallocate_return Q
 
 test_heap Need u==1 | put_list Y=y r r => test_heap_1_put_list Need Y
 
+%macro: test_heap_1_put_list TestHeapPutList -pack
 test_heap_1_put_list I y
 
 # Test tuple & arity (head)
@@ -576,14 +644,14 @@ is_list f y
 
 is_nonempty_list Fail=f S=rx | allocate Need Rs => is_nonempty_list_allocate Fail S Need Rs
 
-%macro:is_nonempty_list_allocate IsNonemptyListAllocate -fail_action
-is_nonempty_list_allocate f x I I
-is_nonempty_list_allocate f r I I
+%macro:is_nonempty_list_allocate IsNonemptyListAllocate -fail_action -pack
+is_nonempty_list_allocate f x I t
+is_nonempty_list_allocate f r I t
 
 is_nonempty_list F=f r | test_heap I1 I2 => is_non_empty_list_test_heap F r I1 I2
 
-%macro: is_non_empty_list_test_heap IsNonemptyListTestHeap -fail_action
-is_non_empty_list_test_heap f r I I
+%macro: is_non_empty_list_test_heap IsNonemptyListTestHeap -fail_action -pack
+is_non_empty_list_test_heap f r I t
 
 %macro: is_nonempty_list IsNonemptyList -fail_action
 is_nonempty_list f x
@@ -912,8 +980,13 @@ node x
 node y
 %hot
 
-i_fast_element j I s d
-i_element j s s d
+i_fast_element r j I d
+i_fast_element x j I d
+i_fast_element y j I d
+
+i_element r j s d
+i_element x j s d
+i_element y j s d
 
 bif1 f b s d
 bif1_body b s d
@@ -940,11 +1013,11 @@ move S r | call_last Ar P=f D => move_call_last S r P D
 
 i_move_call_last f P c r
 
-%macro:move_call_last MoveCallLast -arg_f -nonext
+%macro:move_call_last MoveCallLast -arg_f -nonext -pack
 
 move_call_last/4
-move_call_last x r f P
-move_call_last y r f P
+move_call_last x r f Q
+move_call_last y r f Q
 
 move S=c r | call_only Ar P=f => i_move_call_only P S r
 move S=x r | call_only Ar P=f => move_call_only S r P
@@ -1307,6 +1380,8 @@ fconv Arg=iqan Dst=l => move Arg x | fconv x Dst
 
 fmove q l
 fmove d l
+fmove l d
+
 fconv d l
 
 i_fadd l l l
@@ -1322,12 +1397,6 @@ fcheckerror p => i_fcheckerror
 i_fcheckerror
 fclearerror
 
-fmove FR=l Dst=d | new_float_allocation() => fmove_new FR Dst
- 
-# The new instruction for moving a float out of a floating point register.
-# (No allocation.)
-fmove_new l d
-
 #
 # New apply instructions in R10B.
 #
@@ -1336,7 +1405,21 @@ apply I
 apply_last I P
 
 #
-# New GCing arithmetic instructions.
+# Optimize addition and subtraction of small literals using
+# the i_increment/4 instruction (in bodies, not in guards).
+#
+
+gc_bif2 p Live u$bif:erlang:splus/2 Int=i Reg=d Dst => \
+	gen_increment(Reg, Int, Live, Dst)
+gc_bif2 p Live u$bif:erlang:splus/2 Reg=d Int=i Dst => \
+	gen_increment(Reg, Int, Live, Dst)
+
+gc_bif2 p Live u$bif:erlang:sminus/2 Reg=d Int=i Dst | \
+	negation_is_small(Int) => \
+	gen_increment_from_minus(Reg, Int, Live, Dst)
+
+#
+# GCing arithmetic instructions.
 #
 
 gc_bif2 Fail I u$bif:erlang:splus/2 S1 S2 Dst=d => i_fetch S1 S2 | i_plus Fail I Dst
@@ -1359,6 +1442,10 @@ gc_bif1 Fail I u$bif:erlang:bnot/1 Src Dst=d => i_int_bnot Fail Src I Dst
 gc_bif1 Fail I u$bif:erlang:sminus/1 Src Dst=d => i_fetch i Src | i_minus Fail I Dst
 gc_bif1 Fail I u$bif:erlang:splus/1 Src Dst=d => i_fetch i Src | i_plus Fail I Dst
 
+i_increment r I I d
+i_increment x I I d
+i_increment y I I d
+
 i_plus j I d
 i_minus j I d
 i_times j I d
diff --git a/erts/emulator/beam/sys.h b/erts/emulator/beam/sys.h
index 5a4dad0a28..ff828ae889 100644
--- a/erts/emulator/beam/sys.h
+++ b/erts/emulator/beam/sys.h
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -39,13 +39,6 @@
 #define ENABLE_CHILD_WAITER_THREAD 1
 #endif
 
-/* The ERTS_TIMER_TREAD #define must be visible to the
-   erl_${OS}_sys.h #include files: it controls whether
-   certain optional facilities should be defined or not. */
-#if defined(ERTS_SMP) && 0
-#define ERTS_TIMER_THREAD
-#endif
-
 #if defined (__WIN32__)
 #  include "erl_win_sys.h"
 #elif defined (VXWORKS) 
@@ -232,14 +225,14 @@ int real_printf(const char *fmt, ...);
 #else
 #error Neither 32 nor 64 bit architecture
 #endif
-#ifdef ARCH_64
-#  ifdef HALFWORD_HEAP_EMULATOR
+#if defined(ARCH_64) && defined(HALFWORD_HEAP_EMULATOR)
 #    define HALFWORD_HEAP 1
 #    define HALFWORD_ASSERT 0
-#  else
+#    define ASSERT_HALFWORD(COND) ASSERT(COND)
+#else
 #    define HALFWORD_HEAP 0
 #    define HALFWORD_ASSERT 0
-#  endif
+#    define ASSERT_HALFWORD(COND)
 #endif
 
 #if SIZEOF_VOID_P != SIZEOF_SIZE_T
@@ -338,12 +331,16 @@ typedef unsigned char byte;
     (((size_t) 8) - (((size_t) (X)) & ((size_t) 7)))
 
 #include "erl_lock_check.h"
+
+/* needed by erl_smp.h */
+int erts_send_warning_to_logger_str_nogl(char *);
+
 #include "erl_smp.h"
 
 #ifdef ERTS_WANT_BREAK_HANDLING
 #  ifdef ERTS_SMP
-extern erts_smp_atomic_t erts_break_requested;
-#    define ERTS_BREAK_REQUESTED ((int) erts_smp_atomic_read(&erts_break_requested))
+extern erts_smp_atomic32_t erts_break_requested;
+#    define ERTS_BREAK_REQUESTED ((int) erts_smp_atomic32_read(&erts_break_requested))
 #  else
 extern volatile int erts_break_requested;
 #    define ERTS_BREAK_REQUESTED erts_break_requested
@@ -356,8 +353,8 @@ void erts_do_break_handling(void);
 #    define ERTS_GOT_SIGUSR1 0
 #  else
 #    ifdef ERTS_SMP
-extern erts_smp_atomic_t erts_got_sigusr1;
-#      define ERTS_GOT_SIGUSR1 ((int) erts_smp_atomic_read(&erts_got_sigusr1))
+extern erts_smp_atomic32_t erts_got_sigusr1;
+#      define ERTS_GOT_SIGUSR1 ((int) erts_smp_atomic32_read(&erts_got_sigusr1))
 #    else
 extern volatile int erts_got_sigusr1;
 #      define ERTS_GOT_SIGUSR1 erts_got_sigusr1
@@ -524,7 +521,8 @@ int erts_send_info_to_logger_nogl(erts_dsprintf_buf_t *);
 int erts_send_warning_to_logger_nogl(erts_dsprintf_buf_t *);
 int erts_send_error_to_logger_nogl(erts_dsprintf_buf_t *);
 int erts_send_info_to_logger_str_nogl(char *);
-int erts_send_warning_to_logger_str_nogl(char *);
+/* needed by erl_smp.h (declared above)
+   int erts_send_warning_to_logger_str_nogl(char *); */
 int erts_send_error_to_logger_str_nogl(char *);
 
 typedef struct preload {
@@ -562,11 +560,7 @@ extern char *erts_default_arg0;
 extern char os_type[];
 
 extern int sys_init_time(void);
-#if defined(ERTS_TIMER_THREAD)
-#define erts_deliver_time()
-#else
 extern void erts_deliver_time(void);
-#endif
 extern void erts_time_remaining(SysTimeval *);
 extern int erts_init_time_sup(void);
 extern void erts_sys_init_float(void);
diff --git a/erts/emulator/beam/time.c b/erts/emulator/beam/time.c
index 9cb6ea34ef..c65cc37fc6 100644
--- a/erts/emulator/beam/time.c
+++ b/erts/emulator/beam/time.c
@@ -99,76 +99,18 @@ static erts_smp_mtx_t tiw_lock;
 static ErlTimer** tiw;		/* the timing wheel, allocated in init_time() */
 static Uint tiw_pos;		/* current position in wheel */
 static Uint tiw_nto;		/* number of timeouts in wheel */
+static Uint tiw_min;
+static ErlTimer *tiw_min_ptr;
 
 /* END tiw_lock protected variables */
 
 /* Actual interval time chosen by sys_init_time() */
 static int itime; /* Constant after init */
 
-#if defined(ERTS_TIMER_THREAD)
-static SysTimeval time_start;	/* start of current time interval */
-static erts_aint_t ticks_end;		/* time_start+ticks_end == time_wakeup */
-static erts_aint_t ticks_latest;	/* delta from time_start at latest time update*/
-
-static ERTS_INLINE erts_aint_t time_gettimeofday(SysTimeval *now)
-{
-    erts_aint_t elapsed;
-
-    erts_get_timeval(now);
-    now->tv_usec = 1000 * (now->tv_usec / 1000); /* ms resolution */
-    elapsed = (1000 * (now->tv_sec - time_start.tv_sec) +
-	       (now->tv_usec - time_start.tv_usec) / 1000);
-    // elapsed /= CLOCK_RESOLUTION;
-    return elapsed;
-}
-
-static erts_aint_t do_time_update(void)
-{
-    SysTimeval now;
-    erts_aint_t elapsed;
-
-    elapsed = time_gettimeofday(&now);
-    ticks_latest = elapsed;
-    return elapsed;
-}
-
-static ERTS_INLINE erts_aint_t do_time_read(void)
-{
-    return ticks_latest;
-}
-
-static erts_aint_t do_time_reset(void)
-{
-    SysTimeval now;
-    erts_aint_t elapsed;
-
-    elapsed = time_gettimeofday(&now);
-    time_start = now;
-    ticks_end = LONG_MAX;
-    ticks_latest = 0;
-    return elapsed;
-}
-
-static ERTS_INLINE void do_time_init(void)
-{
-    (void)do_time_reset();
-}
-
-#else
 erts_smp_atomic_t do_time;	/* set at clock interrupt */
-static ERTS_INLINE erts_aint_t do_time_read(void)
-{
-    return erts_smp_atomic_read(&do_time);
-}
-static ERTS_INLINE erts_aint_t do_time_update(void)
-{
-    return do_time_read();
-}
-static ERTS_INLINE void do_time_init(void)
-{
-    erts_smp_atomic_init(&do_time, (erts_aint_t) 0);
-}
-#endif
+static ERTS_INLINE erts_aint_t do_time_read(void) { return erts_smp_atomic_read(&do_time); }
+static ERTS_INLINE erts_aint_t do_time_update(void) { return do_time_read(); }
+static ERTS_INLINE void do_time_init(void) { erts_smp_atomic_init(&do_time, 0L); }
 
 /* get the time (in units of itime) to the next timeout,
    or -1 if there are no timeouts                     */
@@ -182,6 +124,12 @@ static erts_aint_t next_time_internal(void) /* PRE: tiw_lock taken by caller */
   
     if (tiw_nto == 0)
 	return -1;	/* no timeouts in wheel */
+
+    if (tiw_min_ptr) {
+	min = tiw_min;
+	dt  = do_time_read();
+	return ((min >= dt) ? (min - dt) : 0);
+    }
   
     /* start going through wheel to find next timeout */
     tm = nto = 0;
@@ -194,11 +142,17 @@ static erts_aint_t next_time_internal(void) /* PRE: tiw_lock taken by caller */
 	    if (p->count == 0) {
 		/* found next timeout */
 		dt = do_time_read();
+		/* p->count is zero */
+		tiw_min_ptr = p;
+		tiw_min     = tm;
 		return ((tm >= dt) ? (tm - dt) : 0);
 	    } else {
 		/* keep shortest time in 'min' */
-		if (tm + p->count*TIW_SIZE < min)
+		if (tm + p->count*TIW_SIZE < min) {
 		    min = tm + p->count*TIW_SIZE;
+		    tiw_min_ptr = p;
+		    tiw_min     = min;
+		}
 	    }
 	    p = p->next;
 	}
@@ -211,9 +165,33 @@ static erts_aint_t next_time_internal(void) /* PRE: tiw_lock taken by caller */
     return ((min >= dt) ? (min - dt) : 0);
 }
 
-#if !defined(ERTS_TIMER_THREAD)
+static void remove_timer(ErlTimer *p) {
+    /* first */
+    if (!p->prev) {
+	tiw[p->slot] = p->next;
+	if(p->next)
+	    p->next->prev = NULL;
+    } else {
+	p->prev->next = p->next;
+    }
+
+    /* last */
+    if (!p->next) {
+	if (p->prev)
+	    p->prev->next = NULL;
+    } else {
+	p->next->prev = p->prev;
+    }
+
+    p->next = NULL;
+    p->prev = NULL;
+    /* Make sure cancel callback isn't called */
+    p->active = 0;
+    tiw_nto--;
+}
+
 /* Private export to erl_time_sup.c */
-erts_aint_t next_time(void)
+erts_aint_t erts_next_time(void)
 {
     erts_aint_t ret;
 
@@ -223,7 +201,6 @@ erts_aint_t next_time(void)
     erts_smp_mtx_unlock(&tiw_lock);
     return ret;
 }
-#endif
 
 static ERTS_INLINE void bump_timer_internal(erts_aint_t dt) /* PRE: tiw_lock is write-locked */
 {
@@ -251,12 +228,16 @@ static ERTS_INLINE void bump_timer_internal(erts_aint_t dt) /* PRE: tiw_lock is
 	if (tiw_pos == keep_pos) count--;
 	prev = &tiw[tiw_pos];
 	while ((p = *prev) != NULL) {
+	    ASSERT( p != p->next);
 	    if (p->count < count) {     /* we have a timeout */
-		*prev = p->next;	/* Remove from list */
-		tiw_nto--;
-		p->next = NULL;
-		p->active = 0;		/* Make sure cancel callback
-					   isn't called */
+		/* remove min time */
+		if (tiw_min_ptr == p) {
+		    tiw_min_ptr = NULL;
+		    tiw_min = 0;
+		}
+
+		/* Remove from list */
+		remove_timer(p);
 		*timeout_tail = p;	/* Insert in timeout queue */
 		timeout_tail = &p->next;
 	    }
@@ -270,6 +251,8 @@ static ERTS_INLINE void bump_timer_internal(erts_aint_t dt) /* PRE: tiw_lock is
 	dtime--;
     }
     tiw_pos = keep_pos;
+    if (tiw_min_ptr)
+	tiw_min -= dt;
     
     erts_smp_mtx_unlock(&tiw_lock);
     
@@ -284,24 +267,17 @@ static ERTS_INLINE void bump_timer_internal(erts_aint_t dt) /* PRE: tiw_lock is
 	 * callback is called.
 	 */
 	p->next = NULL;
+	p->prev = NULL;
 	p->slot = 0;
 	(*p->timeout)(p->arg);
     }
 }
 
-#if defined(ERTS_TIMER_THREAD)
-static void timer_thread_bump_timer(void)
-{
-    erts_smp_mtx_lock(&tiw_lock);
-    bump_timer_internal(do_time_reset());
-}
-#else
-void bump_timer(erts_aint_t dt) /* dt is value from do_time */
+void erts_bump_timer(erts_aint_t dt) /* dt is value from do_time */
 {
     erts_smp_mtx_lock(&tiw_lock);
     bump_timer_internal(dt);
 }
-#endif
 
 Uint
 erts_timer_wheel_memory_size(void)
@@ -309,82 +285,10 @@ erts_timer_wheel_memory_size(void)
     return (Uint) TIW_SIZE * sizeof(ErlTimer*);
 }
 
-#if defined(ERTS_TIMER_THREAD)
-static struct erts_iwait *timer_thread_iwait;
-
-static int timer_thread_setup_delay(SysTimeval *rem_time)
-{
-    erts_aint_t elapsed;
-    erts_aint_t ticks;
-
-    erts_smp_mtx_lock(&tiw_lock);
-    elapsed = do_time_update();
-    ticks = next_time_internal();
-    if (ticks == -1)	/* timer queue empty */
-	ticks = 100*1000*1000;
-    if (elapsed > ticks)
-	elapsed = ticks;
-    ticks -= elapsed;
-    //ticks *= CLOCK_RESOLUTION;
-    rem_time->tv_sec = ticks / 1000;
-    rem_time->tv_usec = 1000 * (ticks % 1000);
-    ticks_end = ticks;
-    erts_smp_mtx_unlock(&tiw_lock);
-    return ticks;
-}
-
-static void *timer_thread_start(void *ignore)
-{
-    SysTimeval delay;
-
-#ifdef ERTS_ENABLE_LOCK_CHECK
-    erts_lc_set_thread_name("timer");
-#endif
-    erts_register_blockable_thread();
-
-    for(;;) {
-	if (timer_thread_setup_delay(&delay)) {
-	    erts_smp_activity_begin(ERTS_ACTIVITY_WAIT, NULL, NULL, NULL);
-	    ASSERT_NO_LOCKED_LOCKS;
-	    erts_iwait_wait(timer_thread_iwait, &delay);
-	    ASSERT_NO_LOCKED_LOCKS;
-	    erts_smp_activity_end(ERTS_ACTIVITY_WAIT, NULL, NULL, NULL);
-	}
-	else
-	    erts_smp_chk_system_block(NULL, NULL, NULL);
-	timer_thread_bump_timer();
-	ASSERT_NO_LOCKED_LOCKS;
-    }
-    /*NOTREACHED*/
-    return NULL;
-}
-
-static ERTS_INLINE void timer_thread_post_insert(Uint ticks)
-{
-    if ((Sint)ticks < ticks_end)
-	erts_iwait_interrupt(timer_thread_iwait);
-}
-
-static void timer_thread_init(void)
-{
-    erts_thr_opts_t opts = ERTS_THR_OPTS_DEFAULT_INITER;
-    erts_tid_t tid;
-
-    opts->detached = 1;
-
-    timer_thread_iwait = erts_iwait_init();
-    erts_thr_create(&tid, timer_thread_start, NULL, &opts);
-}
-
-#else
-static ERTS_INLINE void timer_thread_post_insert(Uint ticks) { }
-static ERTS_INLINE void timer_thread_init(void) { }
-#endif
-
 /* this routine links the time cells into a free list at the start
    and sets the time queue as empty */
 void
-init_time(void)
+erts_init_time(void)
 {
     int i;
 
@@ -400,10 +304,13 @@ init_time(void)
 	tiw[i] = NULL;
     do_time_init();
     tiw_pos = tiw_nto = 0;
-
-    timer_thread_init();
+    tiw_min_ptr = NULL;
+    tiw_min = 0;
 }
 
+
+
+
 /*
 ** Insert a process into the time queue, with a timeout 't'
 */
@@ -433,16 +340,31 @@ insert_timer(ErlTimer* p, Uint t)
   
     /* insert at head of list at slot */
     p->next = tiw[tm];
+    p->prev = NULL;
+    if (p->next != NULL)
+	p->next->prev = p;
     tiw[tm] = p;
-    tiw_nto++;
 
-    timer_thread_post_insert(ticks);
+
+    /* insert min time */
+    if ((tiw_nto == 0) || ((tiw_min_ptr != NULL) && (ticks < tiw_min))) {
+	tiw_min = ticks;
+	tiw_min_ptr = p;
+    }
+    if ((tiw_min_ptr == p) && (ticks > tiw_min)) {
+	/* some other timer might be 'min' now */
+	tiw_min = 0;
+	tiw_min_ptr = NULL;
+    }
+
+    tiw_nto++;
 }
 
 void
-erl_set_timer(ErlTimer* p, ErlTimeoutProc timeout, ErlCancelProc cancel,
+erts_set_timer(ErlTimer* p, ErlTimeoutProc timeout, ErlCancelProc cancel,
 	      void* arg, Uint t)
 {
+
     erts_deliver_time();
     erts_smp_mtx_lock(&tiw_lock);
     if (p->active) { /* XXX assert ? */
@@ -455,42 +377,34 @@ erl_set_timer(ErlTimer* p, ErlTimeoutProc timeout, ErlCancelProc cancel,
     p->active = 1;
     insert_timer(p, t);
     erts_smp_mtx_unlock(&tiw_lock);
-#if defined(ERTS_SMP) && !defined(ERTS_TIMER_THREAD)
+#if defined(ERTS_SMP)
     if (t <= (Uint) LONG_MAX)
 	erts_sys_schedule_interrupt_timed(1, (long) t);
 #endif
 }
 
 void
-erl_cancel_timer(ErlTimer* p)
+erts_cancel_timer(ErlTimer* p)
 {
-    ErlTimer *tp;
-    ErlTimer **prev;
-
     erts_smp_mtx_lock(&tiw_lock);
     if (!p->active) { /* allow repeated cancel (drivers) */
 	erts_smp_mtx_unlock(&tiw_lock);
 	return;
     }
-    /* find p in linked list at slot p->slot and remove it */
-    prev = &tiw[p->slot];
-    while ((tp = *prev) != NULL) {
-	if (tp == p) {
-	    *prev = p->next;	/* Remove from list */
-	    tiw_nto--;
-	    p->next = NULL;
-	    p->slot = p->count = 0;
-	    p->active = 0;
-	    if (p->cancel != NULL) {
-		erts_smp_mtx_unlock(&tiw_lock);
-		(*p->cancel)(p->arg);
-	    } else {
-		erts_smp_mtx_unlock(&tiw_lock);
-	    }
-	    return;
-	} else {
-	    prev = &tp->next;
-	}
+
+    /* is it the 'min' timer, remove min */
+    if (p == tiw_min_ptr) {
+	tiw_min_ptr = NULL;
+	tiw_min     = 0;
+    }
+
+    remove_timer(p);
+    p->slot = p->count = 0;
+
+    if (p->cancel != NULL) {
+	erts_smp_mtx_unlock(&tiw_lock);
+	(*p->cancel)(p->arg);
+	return;
     }
     erts_smp_mtx_unlock(&tiw_lock);
 }
@@ -502,7 +416,7 @@ erl_cancel_timer(ErlTimer* p)
   immediately if it hadn't been cancelled).
 */
 Uint
-time_left(ErlTimer *p)
+erts_time_left(ErlTimer *p)
 {
     Uint left;
     erts_aint_t dt;
@@ -530,8 +444,7 @@ time_left(ErlTimer *p)
 }
 
 #ifdef DEBUG
-
-void p_slpq()
+void erts_p_slpq()
 {
     int i;
     ErlTimer* p;
@@ -560,5 +473,4 @@ void p_slpq()
 
     erts_smp_mtx_unlock(&tiw_lock);
 }
-
 #endif /* DEBUG */
diff --git a/erts/emulator/beam/utils.c b/erts/emulator/beam/utils.c
index 2bf283d9ec..f531d1430b 100644
--- a/erts/emulator/beam/utils.c
+++ b/erts/emulator/beam/utils.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -59,13 +59,6 @@
 
 /* profile_scheduler mini message queue */
 
-#ifdef ERTS_TIMER_THREAD
-/* A timer thread is not welcomed with this lock violation work around.
- * - Bj�rn-Egil
- */
-#error Timer thread may not be enabled due to lock violation.
-#endif
-
 typedef struct {
     Uint scheduler_id;
     Uint no_schedulers;
@@ -98,7 +91,7 @@ dispatch_profile_msg_q(profile_sched_msg_q *psmq)
 
 
 Eterm*
-erts_heap_alloc(Process* p, Uint need)
+erts_heap_alloc(Process* p, Uint need, Uint xtra)
 {
     ErlHeapFragment* bp;
     Eterm* htop;
@@ -124,7 +117,7 @@ erts_heap_alloc(Process* p, Uint need)
     p->space_verified_from = NULL;
 #endif /* FORCE_HEAP_FRAGS */
 
-    n = need;
+    n = need + xtra;
     bp = MBUF(p);
     if (bp != NULL && need <= (bp->alloc_size - bp->used_size)) {
 	Eterm* ret = bp->mem + bp->used_size;
@@ -160,7 +153,7 @@ erts_heap_alloc(Process* p, Uint need)
     bp->next = MBUF(p);
     MBUF(p) = bp;
     bp->alloc_size = n;
-    bp->used_size = n;
+    bp->used_size = need;
     MBUF_SIZE(p) += n;
     bp->off_heap.first = NULL;
     bp->off_heap.overhead = 0;
@@ -1901,34 +1894,36 @@ erts_destroy_tmp_dsbuf(erts_dsprintf_buf_t *dsbufp)
     erts_free(ERTS_ALC_T_TMP_DSBUF, (void *) dsbufp);
 }
 
-
 /* eq and cmp are written as separate functions a eq is a little faster */
 
 /*
  * Test for equality of two terms.
  * Returns 0 if not equal, or a non-zero value otherwise.
  */
-
+#if HALFWORD_HEAP
+int eq_rel(Eterm a, Eterm* a_base, Eterm b, Eterm* b_base)
+#else
 int eq(Eterm a, Eterm b)
+#endif
 {
     DECLARE_WSTACK(stack);
     Sint sz;
     Eterm* aa;
-    Eterm* bb;	
+    Eterm* bb;
 
 tailrecur:
-    if (a == b) goto pop_next; 
+    if (is_same(a, a_base, b, b_base)) goto pop_next;
 tailrecur_ne:
 
     switch (primary_tag(a)) {
     case TAG_PRIMARY_LIST:
 	if (is_list(b)) {
-	    Eterm* aval = list_val(a);
-	    Eterm* bval = list_val(b);
+	    Eterm* aval = list_val_rel(a, a_base);
+	    Eterm* bval = list_val_rel(b, b_base);
 	    while (1) {
 		Eterm atmp = CAR(aval);
 		Eterm btmp = CAR(bval);
-		if (atmp != btmp) {
+		if (!is_same(atmp,a_base,btmp,b_base)) {
 		    WSTACK_PUSH2(stack,(UWord) CDR(bval),(UWord) CDR(aval));
 		    a = atmp;
 		    b = btmp;
@@ -1936,7 +1931,7 @@ tailrecur_ne:
 		}
 		atmp = CDR(aval);
 		btmp = CDR(bval);
-		if (atmp == btmp) {
+		if (is_same(atmp,a_base,btmp,b_base)) {
 		    goto pop_next;
 		}
 		if (is_not_list(atmp) || is_not_list(btmp)) {
@@ -1944,22 +1939,22 @@ tailrecur_ne:
 		    b = btmp;
 		    goto tailrecur_ne;
 		}
-		aval = list_val(atmp);
-		bval = list_val(btmp);
+		aval = list_val_rel(atmp, a_base);
+		bval = list_val_rel(btmp, b_base);
 	    }
 	}
 	break; /* not equal */
 
     case TAG_PRIMARY_BOXED:
 	{	
-	    Eterm hdr = *boxed_val(a);
+	    Eterm hdr = *boxed_val_rel(a,a_base);
 	    switch (hdr & _TAG_HEADER_MASK) {
 	    case ARITYVAL_SUBTAG:
 		{
-		    aa = tuple_val(a);
-		    if (!is_boxed(b) || *boxed_val(b) != *aa)
+		    aa = tuple_val_rel(a, a_base);
+		    if (!is_boxed(b) || *boxed_val_rel(b,b_base) != *aa)
 			goto not_equal;
-		    bb = tuple_val(b);
+		    bb = tuple_val_rel(b,b_base);
 		    if ((sz = arityval(*aa)) == 0) goto pop_next;
 		    ++aa;
 		    ++bb;
@@ -1978,16 +1973,16 @@ tailrecur_ne:
 		    Uint a_bitoffs;
 		    Uint b_bitoffs;
 		    
-		    if (is_not_binary(b)) {
+		    if (!is_binary_rel(b,b_base)) {
 			goto not_equal;
 		    }
-		    a_size = binary_size(a);
-		    b_size = binary_size(b); 
+		    a_size = binary_size_rel(a,a_base);
+		    b_size = binary_size_rel(b,b_base);
 		    if (a_size != b_size) {
 			goto not_equal;
 		    }
-		    ERTS_GET_BINARY_BYTES(a, a_ptr, a_bitoffs, a_bitsize);
-		    ERTS_GET_BINARY_BYTES(b, b_ptr, b_bitoffs, b_bitsize);
+		    ERTS_GET_BINARY_BYTES_REL(a, a_ptr, a_bitoffs, a_bitsize, a_base);
+		    ERTS_GET_BINARY_BYTES_REL(b, b_ptr, b_bitoffs, b_bitsize, b_base);
 		    if ((a_bitsize | b_bitsize | a_bitoffs | b_bitoffs) == 0) {
 			if (sys_memcmp(a_ptr, b_ptr, a_size) == 0) goto pop_next;
 		    } else if (a_bitsize == b_bitsize) {
@@ -1998,9 +1993,9 @@ tailrecur_ne:
 		}
 	    case EXPORT_SUBTAG:
 		{
-		    if (is_export(b)) {
-			Export* a_exp = *((Export **) (export_val(a) + 1));
-			Export* b_exp = *((Export **) (export_val(b) + 1));
+		    if (is_export_rel(b,b_base)) {
+			Export* a_exp = *((Export **) (export_val_rel(a,a_base) + 1));
+			Export* b_exp = *((Export **) (export_val_rel(b,b_base) + 1));
 			if (a_exp == b_exp) goto pop_next;
 		    }
 		    break; /* not equal */
@@ -2010,10 +2005,10 @@ tailrecur_ne:
 		    ErlFunThing* f1;
 		    ErlFunThing* f2;
   
-		    if (is_not_fun(b))
+		    if (!is_fun_rel(b,b_base))
 			goto not_equal;
-		    f1 = (ErlFunThing *) fun_val(a);
-		    f2 = (ErlFunThing *) fun_val(b);
+		    f1 = (ErlFunThing *) fun_val_rel(a,a_base);
+		    f2 = (ErlFunThing *) fun_val_rel(b,b_base);
 		    if (f1->fe->module != f2->fe->module ||
 			f1->fe->old_index != f2->fe->old_index ||
 			f1->fe->old_uniq != f2->fe->old_uniq ||
@@ -2031,15 +2026,15 @@ tailrecur_ne:
 		ExternalThing *ap;
 		ExternalThing *bp;
 
-		if(is_not_external(b))
+		if(!is_external_rel(b,b_base))
 		    goto not_equal;
 
-		ap = external_thing_ptr(a);
-		bp = external_thing_ptr(b);
+		ap = external_thing_ptr_rel(a,a_base);
+		bp = external_thing_ptr_rel(b,b_base);
 
 		if(ap->header == bp->header && ap->node == bp->node) {
-		    ASSERT(1 == external_data_words(a));
-		    ASSERT(1 == external_data_words(b));
+		    ASSERT(1 == external_data_words_rel(a,a_base));
+		    ASSERT(1 == external_data_words_rel(b,b_base));
 		    
 		    if (ap->data.ui[0] == bp->data.ui[0]) goto pop_next;
 		}
@@ -2057,27 +2052,36 @@ tailrecur_ne:
 		Uint alen;
 		Uint blen;
 		Uint i;
+		ExternalThing* athing;
+		ExternalThing* bthing;
 
-		if(is_not_external_ref(b))
+		if(!is_external_ref_rel(b,b_base))
 		    goto not_equal;
 
-		if(external_node(a) != external_node(b))
+		athing = external_thing_ptr_rel(a,a_base);
+		bthing = external_thing_ptr_rel(b,b_base);
+
+		if(athing->node != bthing->node)
 		    goto not_equal;
 
-		anum = external_ref_numbers(a);
-		bnum = external_ref_numbers(b);
-		alen = external_ref_no_of_numbers(a);
-		blen = external_ref_no_of_numbers(b);
+		anum = external_thing_ref_numbers(athing);
+		bnum = external_thing_ref_numbers(bthing);
+		alen = external_thing_ref_no_of_numbers(athing);
+		blen = external_thing_ref_no_of_numbers(bthing);
 
 		goto ref_common;
 	    case REF_SUBTAG:
-  
-		    if (is_not_internal_ref(b))
+		    if (!is_internal_ref_rel(b,b_base))
 			goto not_equal;
-		    alen = internal_ref_no_of_numbers(a);
-		    blen = internal_ref_no_of_numbers(b);
-		    anum = internal_ref_numbers(a);
-		    bnum = internal_ref_numbers(b);
+
+		    {
+			RefThing* athing = ref_thing_ptr_rel(a,a_base);
+			RefThing* bthing = ref_thing_ptr_rel(b,b_base);
+			alen = internal_thing_ref_no_of_numbers(athing);
+			blen = internal_thing_ref_no_of_numbers(bthing);
+			anum = internal_thing_ref_numbers(athing);
+			bnum = internal_thing_ref_numbers(bthing);
+		    }
 
 	    ref_common:
 		    ASSERT(alen > 0 && blen > 0);
@@ -2122,10 +2126,10 @@ tailrecur_ne:
 		{
 		    int i;
   
-		    if (is_not_big(b))
+		    if (!is_big_rel(b,b_base))
 			goto not_equal;
-		    aa = big_val(a); /* get pointer to thing */
-		    bb = big_val(b);
+		    aa = big_val_rel(a,a_base);
+		    bb = big_val_rel(b,b_base);
 		    if (*aa != *bb)
 			goto not_equal;
 		    i = BIG_ARITY(aa);
@@ -2140,9 +2144,9 @@ tailrecur_ne:
 		    FloatDef af;
 		    FloatDef bf;
   
-		    if (is_float(b)) {
-			GET_DOUBLE(a, af);
-			GET_DOUBLE(b, bf);
+		    if (is_float_rel(b,b_base)) {
+			GET_DOUBLE_REL(a, af, a_base);
+			GET_DOUBLE_REL(b, bf, b_base);
 			if (af.fd == bf.fd) goto pop_next;
 		    }
 		    break; /* not equal */
@@ -2161,7 +2165,7 @@ term_array: /* arrays in 'aa' and 'bb', length in 'sz' */
 	Eterm* bp = bb;
 	Sint i = sz;
 	for (;;) {
-	    if (*ap != *bp) break;
+	    if (!is_same(*ap,a_base,*bp,b_base)) break;
 	    if (--i == 0) goto pop_next;
 	    ++ap;
 	    ++bp;
@@ -2250,7 +2254,11 @@ static int cmp_atoms(Eterm a, Eterm b)
 		    bb->name+3, bb->len-3);
 }
 
+#if HALFWORD_HEAP
+Sint cmp_rel(Eterm a, Eterm* a_base, Eterm b, Eterm* b_base)
+#else
 Sint cmp(Eterm a, Eterm b)
+#endif
 {
     DECLARE_WSTACK(stack);
     Eterm* aa;
@@ -2284,7 +2292,7 @@ Sint cmp(Eterm a, Eterm b)
 
 
 tailrecur:
-    if (a == b) {		/* Equal values or pointers. */
+    if (is_same(a,a_base,b,b_base)) {	/* Equal values or pointers. */
 	goto pop_next;
     }
 tailrecur_ne:
@@ -2310,9 +2318,9 @@ tailrecur_ne:
 	    if (is_internal_port(b)) {
 		bnode = erts_this_node;
 		bdata = internal_port_data(b);
-	    } else if (is_external_port(b)) {
-		bnode = external_port_node(b);
-		bdata = external_port_data(b);
+	    } else if (is_external_port_rel(b,b_base)) {
+		bnode = external_port_node_rel(b,b_base);
+		bdata = external_port_data_rel(b,b_base);
 	    } else {
 		a_tag = PORT_DEF;
 		goto mixed_types;
@@ -2328,9 +2336,9 @@ tailrecur_ne:
 	    if (is_internal_pid(b)) {
 		bnode = erts_this_node;
 		bdata = internal_pid_data(b);
-	    } else if (is_external_pid(b)) {
-		bnode = external_pid_node(b);
-		bdata = external_pid_data(b);
+	    } else if (is_external_pid_rel(b,b_base)) {
+		bnode = external_pid_node_rel(b,b_base);
+		bdata = external_pid_data_rel(b,b_base);
 	    } else {
 		a_tag = PID_DEF;
 		goto mixed_types;
@@ -2363,12 +2371,12 @@ tailrecur_ne:
 	    a_tag = LIST_DEF;
 	    goto mixed_types;
 	}
-	aa = list_val(a);
-	bb = list_val(b);
+	aa = list_val_rel(a,a_base);
+	bb = list_val_rel(b,b_base);
 	while (1) {
 	    Eterm atmp = CAR(aa);
 	    Eterm btmp = CAR(bb);
-	    if (atmp != btmp) {
+	    if (!is_same(atmp,a_base,btmp,b_base)) {
 		WSTACK_PUSH2(stack,(UWord) CDR(bb),(UWord) CDR(aa));
 		a = atmp;
 		b = btmp;
@@ -2376,7 +2384,7 @@ tailrecur_ne:
 	    }
 	    atmp = CDR(aa);
 	    btmp = CDR(bb);
-	    if (atmp == btmp) {
+	    if (is_same(atmp,a_base,btmp,b_base)) {
 		goto pop_next;
 	    }
 	    if (is_not_list(atmp) || is_not_list(btmp)) {
@@ -2384,20 +2392,20 @@ tailrecur_ne:
 		b = btmp;
 		goto tailrecur_ne;
 	    }
-	    aa = list_val(atmp);
-	    bb = list_val(btmp);
+	    aa = list_val_rel(atmp,a_base);
+	    bb = list_val_rel(btmp,b_base);
 	}
     case TAG_PRIMARY_BOXED:
 	{
-	    Eterm ahdr = *boxed_val(a);
+	    Eterm ahdr = *boxed_val_rel(a,a_base);
 	    switch ((ahdr & _TAG_HEADER_MASK) >> _TAG_PRIMARY_SIZE) {
 	    case (_TAG_HEADER_ARITYVAL >> _TAG_PRIMARY_SIZE):
-		if (is_not_tuple(b)) {
+		if (!is_tuple_rel(b,b_base)) {
 		    a_tag = TUPLE_DEF;
 		    goto mixed_types;
 		}
-		aa = tuple_val(a);
-		bb = tuple_val(b);
+		aa = tuple_val_rel(a,a_base);
+		bb = tuple_val_rel(b,b_base);
 		/* compare the arities */
 		i = arityval(ahdr);	/* get the arity*/
 		if (i != arityval(*bb)) {
@@ -2411,31 +2419,31 @@ tailrecur_ne:
 		goto term_array;
 
 	    case (_TAG_HEADER_FLOAT >> _TAG_PRIMARY_SIZE):
-		if (is_not_float(b)) {
+		if (!is_float_rel(b,b_base)) {
 		    a_tag = FLOAT_DEF;
 		    goto mixed_types;
 		} else {
 		    FloatDef af;
 		    FloatDef bf; 
 
-		    GET_DOUBLE(a, af);
-		    GET_DOUBLE(b, bf);
+		    GET_DOUBLE_REL(a, af, a_base);
+		    GET_DOUBLE_REL(b, bf, b_base);
 		    ON_CMP_GOTO(float_comp(af.fd, bf.fd));
 		}
 	    case (_TAG_HEADER_POS_BIG >> _TAG_PRIMARY_SIZE):
 	    case (_TAG_HEADER_NEG_BIG >> _TAG_PRIMARY_SIZE):
-		if (is_not_big(b)) {
+		if (!is_big_rel(b,b_base)) {
 		    a_tag = BIG_DEF;
 		    goto mixed_types;
 		}
-		ON_CMP_GOTO(big_comp(a, b));
+		ON_CMP_GOTO(big_comp(rterm2wterm(a,a_base), rterm2wterm(b,b_base)));
 	    case (_TAG_HEADER_EXPORT >> _TAG_PRIMARY_SIZE):
-		if (is_not_export(b)) {
+		if (!is_export_rel(b,b_base)) {
 		    a_tag = EXPORT_DEF;
 		    goto mixed_types;
 		} else {
-		    Export* a_exp = *((Export **) (export_val(a) + 1));
-		    Export* b_exp = *((Export **) (export_val(b) + 1));
+		    Export* a_exp = *((Export **) (export_val_rel(a,a_base) + 1));
+		    Export* b_exp = *((Export **) (export_val_rel(b,b_base) + 1));
 
 		    if ((j = cmp_atoms(a_exp->code[0], b_exp->code[0])) != 0) {
 			RETURN_NEQ(j);
@@ -2447,12 +2455,12 @@ tailrecur_ne:
 		}
 		break;
 	    case (_TAG_HEADER_FUN >> _TAG_PRIMARY_SIZE):
-		if (is_not_fun(b)) {
+		if (!is_fun_rel(b,b_base)) {
 		    a_tag = FUN_DEF;
 		    goto mixed_types;
 		} else {
-		    ErlFunThing* f1 = (ErlFunThing *) fun_val(a);
-		    ErlFunThing* f2 = (ErlFunThing *) fun_val(b);
+		    ErlFunThing* f1 = (ErlFunThing *) fun_val_rel(a,a_base);
+		    ErlFunThing* f2 = (ErlFunThing *) fun_val_rel(b,b_base);
 		    Sint diff;
 
 		    diff = cmpbytes(atom_tab(atom_val(f1->fe->module))->name,
@@ -2484,51 +2492,57 @@ tailrecur_ne:
 		if (is_internal_pid(b)) {
 		    bnode = erts_this_node;
 		    bdata = internal_pid_data(b);
-		} else if (is_external_pid(b)) {
-		    bnode = external_pid_node(b);
-		    bdata = external_pid_data(b);
+		} else if (is_external_pid_rel(b,b_base)) {
+		    bnode = external_pid_node_rel(b,b_base);
+		    bdata = external_pid_data_rel(b,b_base);
 		} else {
 		    a_tag = EXTERNAL_PID_DEF;
 		    goto mixed_types;
 		}
-		anode = external_pid_node(a);
-		adata = external_pid_data(a);
+		anode = external_pid_node_rel(a,a_base);
+		adata = external_pid_data_rel(a,a_base);
 		goto pid_common;
 	    case (_TAG_HEADER_EXTERNAL_PORT >> _TAG_PRIMARY_SIZE):
 		if (is_internal_port(b)) {
 		    bnode = erts_this_node;
 		    bdata = internal_port_data(b);
-		} else if (is_external_port(b)) {
-		    bnode = external_port_node(b);
-		    bdata = external_port_data(b);
+		} else if (is_external_port_rel(b,b_base)) {
+		    bnode = external_port_node_rel(b,b_base);
+		    bdata = external_port_data_rel(b,b_base);
 		} else {
 		    a_tag = EXTERNAL_PORT_DEF;
 		    goto mixed_types;
 		}
-		anode = external_port_node(a);
-		adata = external_port_data(a);
+		anode = external_port_node_rel(a,a_base);
+		adata = external_port_data_rel(a,a_base);
 		goto port_common;
 	    case (_TAG_HEADER_REF >> _TAG_PRIMARY_SIZE):
 		/*
 		 * Note! When comparing refs we need to compare ref numbers
 		 * (32-bit words), *not* ref data words.
 		 */
+
 		
-		if (is_internal_ref(b)) {
+		if (is_internal_ref_rel(b,b_base)) {
+		    RefThing* bthing = ref_thing_ptr_rel(b,b_base);
 		    bnode = erts_this_node;
-		    bnum = internal_ref_numbers(b);
-		    blen = internal_ref_no_of_numbers(b);
-		} else if(is_external_ref(b)) {
-		    bnode = external_ref_node(b);
-		    bnum = external_ref_numbers(b);
-		    blen = external_ref_no_of_numbers(b);
+		    bnum = internal_thing_ref_numbers(bthing);
+		    blen = internal_thing_ref_no_of_numbers(bthing);
+		} else if(is_external_ref_rel(b,b_base)) {
+		    ExternalThing* bthing = external_thing_ptr_rel(b,b_base);
+		    bnode = bthing->node;
+		    bnum = external_thing_ref_numbers(bthing);
+		    blen = external_thing_ref_no_of_numbers(bthing);
 		} else {
 		    a_tag = REF_DEF;
 		    goto mixed_types;
 		}
-		anode = erts_this_node;
-		anum = internal_ref_numbers(a);
-		alen = internal_ref_no_of_numbers(a);
+		{
+		    RefThing* athing = ref_thing_ptr_rel(a,a_base);
+		    anode = erts_this_node;
+		    anum = internal_thing_ref_numbers(athing);
+		    alen = internal_thing_ref_no_of_numbers(athing);
+		}
 		
 	    ref_common:
 		CMP_NODES(anode, bnode);
@@ -2557,31 +2571,36 @@ tailrecur_ne:
 			RETURN_NEQ((Sint32) (anum[i] - bnum[i]));
 		goto pop_next;
 	    case (_TAG_HEADER_EXTERNAL_REF >> _TAG_PRIMARY_SIZE):
-		if (is_internal_ref(b)) {
+		if (is_internal_ref_rel(b,b_base)) {
+		    RefThing* bthing = ref_thing_ptr_rel(b,b_base);
 		    bnode = erts_this_node;
-		    bnum = internal_ref_numbers(b);
-		    blen = internal_ref_no_of_numbers(b);
-		} else if (is_external_ref(b)) {
-		    bnode = external_ref_node(b);
-		    bnum = external_ref_numbers(b);
-		    blen = external_ref_no_of_numbers(b);
+		    bnum = internal_thing_ref_numbers(bthing);
+		    blen = internal_thing_ref_no_of_numbers(bthing);
+		} else if (is_external_ref_rel(b,b_base)) {
+		    ExternalThing* bthing = external_thing_ptr_rel(b,b_base);
+		    bnode = bthing->node;
+		    bnum = external_thing_ref_numbers(bthing);
+		    blen = external_thing_ref_no_of_numbers(bthing);
 		} else {
 		    a_tag = EXTERNAL_REF_DEF;
 		    goto mixed_types;
 		}
-		anode = external_ref_node(a);
-		anum = external_ref_numbers(a);
-		alen = external_ref_no_of_numbers(a);
+		{
+		    ExternalThing* athing = external_thing_ptr_rel(a,a_base);
+		    anode = athing->node;
+		    anum = external_thing_ref_numbers(athing);
+		    alen = external_thing_ref_no_of_numbers(athing);
+		}
 		goto ref_common;
 	    default:
 		/* Must be a binary */
-		ASSERT(is_binary(a));
-		if (is_not_binary(b)) {
+		ASSERT(is_binary_rel(a,a_base));
+		if (!is_binary_rel(b,b_base)) {
 		    a_tag = BINARY_DEF;
 		    goto mixed_types;
 		} else {
-		    Uint a_size = binary_size(a);
-		    Uint b_size = binary_size(b);
+		    Uint a_size = binary_size_rel(a,a_base);
+		    Uint b_size = binary_size_rel(b,b_base);
 		    Uint a_bitsize;
 		    Uint b_bitsize;
 		    Uint a_bitoffs;
@@ -2590,8 +2609,8 @@ tailrecur_ne:
 		    int cmp;
 		    byte* a_ptr;
 		    byte* b_ptr;
-		    ERTS_GET_BINARY_BYTES(a, a_ptr, a_bitoffs, a_bitsize);
-		    ERTS_GET_BINARY_BYTES(b, b_ptr, b_bitoffs, b_bitsize);
+		    ERTS_GET_BINARY_BYTES_REL(a, a_ptr, a_bitoffs, a_bitsize, a_base);
+		    ERTS_GET_BINARY_BYTES_REL(b, b_ptr, b_bitoffs, b_bitsize, b_base);
 		    if ((a_bitsize | b_bitsize | a_bitoffs | b_bitoffs) == 0) {
 			min_size = (a_size < b_size) ? a_size : b_size;
 			if ((cmp = sys_memcmp(a_ptr, b_ptr, min_size)) != 0) {
@@ -2618,7 +2637,6 @@ tailrecur_ne:
      */
 
  mixed_types:
-    b_tag = tag_val_def(b);
 
     {
 	FloatDef f1, f2;
@@ -2628,39 +2646,47 @@ tailrecur_ne:
 #else
 	Eterm *big_buf = erts_get_scheduler_data()->cmp_tmp_heap;
 #endif
+#if HALFWORD_HEAP
+	Wterm aw = is_immed(a) ? a : rterm2wterm(a,a_base);
+	Wterm bw = is_immed(b) ? b : rterm2wterm(b,b_base);
+#else
+	Eterm aw = a;
+	Eterm bw = b;
+#endif
+	b_tag = tag_val_def(bw);
 
 	switch(_NUMBER_CODE(a_tag, b_tag)) {
 	case SMALL_BIG:
 	    big = small_to_big(signed_val(a), big_buf);
-	    j = big_comp(big, b);
+	    j = big_comp(big, bw);
 	    break;
 	case SMALL_FLOAT:
 	    f1.fd = signed_val(a);
-	    GET_DOUBLE(b, f2);
+	    GET_DOUBLE(bw, f2);
 	    j = float_comp(f1.fd, f2.fd);
 	    break;
 	case BIG_SMALL:
 	    big = small_to_big(signed_val(b), big_buf);
-	    j = big_comp(a, big);
+	    j = big_comp(aw, big);
 	    break;
 	case BIG_FLOAT:
-	    if (big_to_double(a, &f1.fd) < 0) {
+	    if (big_to_double(aw, &f1.fd) < 0) {
 		j = big_sign(a) ? -1 : 1;
 	    } else {
-		GET_DOUBLE(b, f2);
+		GET_DOUBLE(bw, f2);
 		j = float_comp(f1.fd, f2.fd);
 	    }
 	    break;
 	case FLOAT_SMALL:
-	    GET_DOUBLE(a, f1);
+	    GET_DOUBLE(aw, f1);
 	    f2.fd = signed_val(b);
 	    j = float_comp(f1.fd, f2.fd);
 	    break;
 	case FLOAT_BIG:
-	    if (big_to_double(b, &f2.fd) < 0) {
+	    if (big_to_double(bw, &f2.fd) < 0) {
 		j = big_sign(b) ? 1 : -1;
 	    } else {
-		GET_DOUBLE(a, f1);
+		GET_DOUBLE(aw, f1);
 		j = float_comp(f1.fd, f2.fd);
 	    }
 	    break;
@@ -3183,7 +3209,7 @@ erts_create_smp_ptimer(ErtsSmpPTimer **timer_ref,
 
     *timer_ref = res;
 
-    erl_set_timer(&res->timer.tm,
+    erts_set_timer(&res->timer.tm,
 		  (ErlTimeoutProc) ptimer_timeout,
 		  (ErlCancelProc) ptimer_cancelled,
 		  (void*) res,
@@ -3197,7 +3223,7 @@ erts_cancel_smp_ptimer(ErtsSmpPTimer *ptimer)
 	ASSERT(*ptimer->timer.timer_ref == ptimer);
 	*ptimer->timer.timer_ref = NULL;
 	ptimer->timer.flags |= ERTS_PTMR_FLG_CANCELLED;
-	erl_cancel_timer(&ptimer->timer.tm);
+	erts_cancel_timer(&ptimer->timer.tm);
     }
 }
 
diff --git a/erts/emulator/drivers/common/efile_drv.c b/erts/emulator/drivers/common/efile_drv.c
index 786fa7da77..6449c6f506 100644
--- a/erts/emulator/drivers/common/efile_drv.c
+++ b/erts/emulator/drivers/common/efile_drv.c
@@ -385,7 +385,6 @@ struct t_data
 	    ErlDrvBinary *binp;
 	    int           size;
 	    int           offset;
-	    char          name[1];
 	} read_file;
 	struct {
 	    struct t_readdir_buf *first_buf;
@@ -1117,7 +1116,7 @@ static void invoke_read_file(void *data)
 	Sint64 size;
 	
 	if (! (d->result_ok = 
-	       efile_openfile(&d->errInfo, d->c.read_file.name, 
+	       efile_openfile(&d->errInfo, d->b, 
 			      EFILE_MODE_READ, &fd, &size))) {
 	    goto done;
 	}
@@ -3071,7 +3070,7 @@ file_outputv(ErlDrvData e, ErlIOVec *ev) {
 	d->command = command;
 	d->reply = !0;
 	/* Copy name */
-	FILENAME_COPY(d->c.read_file.name, filename);
+	FILENAME_COPY(d->b, filename);
 	d->c.read_file.binp = NULL;
 	d->invoke = invoke_read_file;
 	d->free = free_read_file;
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c
index 1382d1dfe4..b491242aea 100644
--- a/erts/emulator/drivers/common/inet_drv.c
+++ b/erts/emulator/drivers/common/inet_drv.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1997-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1997-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -4945,39 +4945,45 @@ static int inet_ctl_getifaddrs(inet_descriptor* desc_p,
 	*buf_p++ = '\0';
 	*buf_p++ = INET_IFOPT_FLAGS;
 	put_int32(IFGET_FLAGS(ifa_p->ifa_flags), buf_p); buf_p += 4;
-	if (ifa_p->ifa_addr->sa_family == AF_INET
+	if (ifa_p->ifa_addr) {
+	    if (ifa_p->ifa_addr->sa_family == AF_INET
 #if defined(AF_INET6)
-	    || ifa_p->ifa_addr->sa_family == AF_INET6
+		|| ifa_p->ifa_addr->sa_family == AF_INET6
 #endif
-	    ) {
-	    SOCKADDR_TO_BUF(INET_IFOPT_ADDR, ifa_p->ifa_addr);
-	    BUF_ENSURE(1);
-	    SOCKADDR_TO_BUF(INET_IFOPT_NETMASK, ifa_p->ifa_netmask);
-	    if (ifa_p->ifa_flags & IFF_POINTOPOINT) {
-		BUF_ENSURE(1);
-		SOCKADDR_TO_BUF(INET_IFOPT_DSTADDR, ifa_p->ifa_dstaddr);
-	    } else if (ifa_p->ifa_flags & IFF_BROADCAST) {
-		BUF_ENSURE(1);
-		SOCKADDR_TO_BUF(INET_IFOPT_BROADADDR, ifa_p->ifa_broadaddr);
+		) {
+		SOCKADDR_TO_BUF(INET_IFOPT_ADDR, ifa_p->ifa_addr);
+		if (ifa_p->ifa_netmask) {
+		    BUF_ENSURE(1);
+		    SOCKADDR_TO_BUF(INET_IFOPT_NETMASK, ifa_p->ifa_netmask);
+		}
+		if (ifa_p->ifa_dstaddr &&
+		    (ifa_p->ifa_flags & IFF_POINTOPOINT)) {
+		    BUF_ENSURE(1);
+		    SOCKADDR_TO_BUF(INET_IFOPT_DSTADDR, ifa_p->ifa_dstaddr);
+		} else if (ifa_p->ifa_broadaddr &&
+			   (ifa_p->ifa_flags & IFF_BROADCAST)) {
+		    BUF_ENSURE(1);
+		    SOCKADDR_TO_BUF(INET_IFOPT_BROADADDR, ifa_p->ifa_broadaddr);
+		}
 	    }
-	}
 #if defined(AF_LINK) || defined(AF_PACKET)
-	else if (
+	    else if (
 #if defined(AF_LINK)
-		 ifa_p->ifa_addr->sa_family == AF_LINK
+		     ifa_p->ifa_addr->sa_family == AF_LINK
 #else
-		 0
+		     0
 #endif
 #if defined(AF_PACKET)
-		 || ifa_p->ifa_addr->sa_family == AF_PACKET
+		     || ifa_p->ifa_addr->sa_family == AF_PACKET
 #endif
-		 ) {
-	    char *bp = buf_p;
-	    BUF_ENSURE(1);
-	    SOCKADDR_TO_BUF(INET_IFOPT_HWADDR, ifa_p->ifa_addr);
-	    if (buf_p - bp < 4) buf_p = bp; /* Empty hwaddr */
-	}
+		     ) {
+		char *bp = buf_p;
+		BUF_ENSURE(1);
+		SOCKADDR_TO_BUF(INET_IFOPT_HWADDR, ifa_p->ifa_addr);
+		if (buf_p - bp < 4) buf_p = bp; /* Empty hwaddr */
+	    }
 #endif
+	}
 	BUF_ENSURE(1);
 	*buf_p++ = '\0';
     }
@@ -5044,9 +5050,17 @@ static STATUS wrap_sockopt(STATUS (*function)() /* Yep, no parameter
 }
 #endif
 
+/* Per H @ Tail-f: The original code here had problems that possibly
+   only occur if you abuse it for non-INET sockets, but anyway:
+   a) If the getsockopt for SO_PRIORITY or IP_TOS failed, the actual
+      requested setsockopt was never even attempted.
+   b) If {get,set}sockopt for one of IP_TOS and SO_PRIORITY failed,
+      but ditto for the other worked and that was actually the requested
+      option, failure was still reported to erlang.                  */
+
 #if  defined(IP_TOS) && defined(SOL_IP) && defined(SO_PRIORITY)
 static int setopt_prio_tos_trick
-	   (int fd, int proto, int type, char* arg_ptr, int arg_sz)
+	(int fd, int proto, int type, char* arg_ptr, int arg_sz, int propagate)
 {
     /* The relations between SO_PRIORITY, TOS and other options
        is not what you (or at least I) would expect...:
@@ -5059,6 +5073,8 @@ static int setopt_prio_tos_trick
     int          tmp_ival_prio;
     int          tmp_ival_tos;
     int          res;
+    int          res_prio;
+    int          res_tos;
 #ifdef HAVE_SOCKLEN_T
 	    socklen_t
 #else
@@ -5067,28 +5083,35 @@ static int setopt_prio_tos_trick
 		tmp_arg_sz_prio = sizeof(tmp_ival_prio),
 		tmp_arg_sz_tos  = sizeof(tmp_ival_tos);
 
-    res = sock_getopt(fd, SOL_SOCKET, SO_PRIORITY,
+    res_prio = sock_getopt(fd, SOL_SOCKET, SO_PRIORITY,
 		      (char *) &tmp_ival_prio, &tmp_arg_sz_prio);
-    if (res == 0) {
-	res = sock_getopt(fd, SOL_IP, IP_TOS, 
+    res_tos = sock_getopt(fd, SOL_IP, IP_TOS, 
 		      (char *) &tmp_ival_tos, &tmp_arg_sz_tos);
-	if (res == 0) {
 	    res = sock_setopt(fd, proto, type, arg_ptr, arg_sz);
 	    if (res == 0) {
 		if (type != SO_PRIORITY) {
-		    if (type != IP_TOS) {
-			res = sock_setopt(fd, 
+	    if (type != IP_TOS && res_tos == 0) {
+		res_tos = sock_setopt(fd, 
 					  SOL_IP, 
 					  IP_TOS,
 					  (char *) &tmp_ival_tos, 
 					  tmp_arg_sz_tos);
+		if (propagate)
+		    res = res_tos;
 		    }
-		    if (res == 0) {
-			res =  sock_setopt(fd, 
+	    if (res == 0 && res_prio == 0) {
+		res_prio = sock_setopt(fd, 
 					   SOL_SOCKET, 
 					   SO_PRIORITY,
 					   (char *) &tmp_ival_prio, 
 					   tmp_arg_sz_prio);
+		if (propagate) {		
+		    /* Some kernels set a SO_PRIORITY by default that you are not permitted to reset,
+		       silently ignore this error condition */
+		    if (res_prio != 0 && sock_errno() == EPERM) {
+			res = 0;
+		    } else {
+			res = res_prio;
 		    }
 		}
 	    }
@@ -5434,7 +5457,7 @@ static int inet_set_opts(inet_descriptor* desc, char* ptr, int len)
 	    return -1;
 	}
 #if  defined(IP_TOS) && defined(SOL_IP) && defined(SO_PRIORITY)
-	res = setopt_prio_tos_trick (desc->s, proto, type, arg_ptr, arg_sz);
+	res = setopt_prio_tos_trick (desc->s, proto, type, arg_ptr, arg_sz, propagate);
 #else
 	res = sock_setopt	    (desc->s, proto, type, arg_ptr, arg_sz);
 #endif
@@ -5964,7 +5987,7 @@ static int sctp_set_opts(inet_descriptor* desc, char* ptr, int len)
 	    return -1;
 	}
 #if  defined(IP_TOS) && defined(SOL_IP) && defined(SO_PRIORITY)
-	res = setopt_prio_tos_trick (desc->s, proto, type, arg_ptr, arg_sz);
+	res = setopt_prio_tos_trick (desc->s, proto, type, arg_ptr, arg_sz, 1);
 #else
 	res = sock_setopt	    (desc->s, proto, type, arg_ptr, arg_sz);
 #endif
diff --git a/erts/emulator/drivers/unix/unix_efile.c b/erts/emulator/drivers/unix/unix_efile.c
index 6297ccb8bc..4b3934657c 100644
--- a/erts/emulator/drivers/unix/unix_efile.c
+++ b/erts/emulator/drivers/unix/unix_efile.c
@@ -620,7 +620,7 @@ efile_readdir(Efile_error* errInfo,	/* Where to return error codes. */
 	if (IS_DOT_OR_DOTDOT(dirp->d_name))
 	    continue;
 	buffer[0] = '\0';
-	strncat(buffer, dirp->d_name, size-1);
+	strncat(buffer, dirp->d_name, (*size)-1);
 	*size = strlen(dirp->d_name);
 	return 1;
     }
diff --git a/erts/emulator/drivers/win32/win_con.c b/erts/emulator/drivers/win32/win_con.c
index 2202ca655f..14f7941643 100644
--- a/erts/emulator/drivers/win32/win_con.c
+++ b/erts/emulator/drivers/win32/win_con.c
@@ -704,6 +704,18 @@ FrameWndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
 	}
         write_inbuf(&c, 1);
 	return 0;
+    case WM_MOUSEWHEEL:
+      {
+	int delta = GET_WHEEL_DELTA_WPARAM(wParam);
+	if (delta < 0) {
+	  PostMessage(hClientWnd, WM_VSCROLL, MAKELONG(SB_THUMBTRACK,
+						       (iVscrollPos + 5)),0);
+	} else {
+	  WORD pos = ((iVscrollPos - 5) < 0) ? 0 : (iVscrollPos - 5);
+	  PostMessage(hClientWnd, WM_VSCROLL, MAKELONG(SB_THUMBTRACK,pos),0);
+	}
+      return 0;
+      }
     case WM_CHAR:
 	c = (TCHAR)wParam;
         write_inbuf(&c,1);
diff --git a/erts/emulator/drivers/win32/win_efile.c b/erts/emulator/drivers/win32/win_efile.c
index 4ec9579529..101853736a 100755
--- a/erts/emulator/drivers/win32/win_efile.c
+++ b/erts/emulator/drivers/win32/win_efile.c
@@ -1016,8 +1016,8 @@ efile_write_info(Efile_error* errInfo,
      } \
     }
 
-    MKTIME(ModifyFileTime, pInfo->accessTime, mtime);
-    MKTIME(AccessFileTime, pInfo->modifyTime, atime);
+    MKTIME(ModifyFileTime, pInfo->modifyTime, mtime);
+    MKTIME(AccessFileTime, pInfo->accessTime, atime);
     MKTIME(CreationFileTime, pInfo->cTime, ctime);
 #undef MKTIME
 
diff --git a/erts/emulator/sys/common/erl_mseg.c b/erts/emulator/sys/common/erl_mseg.c
index b1ee165489..8421eb415c 100644
--- a/erts/emulator/sys/common/erl_mseg.c
+++ b/erts/emulator/sys/common/erl_mseg.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2002-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2002-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -35,6 +35,7 @@
 #include "global.h"
 #include "erl_threads.h"
 #include "erl_mtrace.h"
+#include "erl_time.h"
 #include "big.h"
 
 #if HAVE_ERTS_MSEG
@@ -76,8 +77,10 @@ static int atoms_initialized;
 
 static Uint cache_check_interval;
 
+typedef struct mem_kind_t MemKind;
+
 static void check_cache(void *unused);
-static void mseg_clear_cache(void);
+static void mseg_clear_cache(MemKind*);
 static int is_cache_check_scheduled;
 #ifdef ERTS_THREADS_NO_SMP
 static int is_cache_check_requested;
@@ -159,14 +162,43 @@ static struct {
     CallCounter check_cache;
 } calls;
 
-static cache_desc_t cache_descs[MAX_CACHE_SIZE];
-static cache_desc_t *free_cache_descs;
-static cache_desc_t *cache;
-static cache_desc_t *cache_end;
-static Uint cache_hits;
-static Uint cache_size;
-static Uint min_cached_seg_size;
-static Uint max_cached_seg_size;
+struct mem_kind_t {
+    cache_desc_t cache_descs[MAX_CACHE_SIZE];
+    cache_desc_t *free_cache_descs;
+    cache_desc_t *cache;
+    cache_desc_t *cache_end;
+
+    Uint cache_size;
+    Uint min_cached_seg_size;
+    Uint max_cached_seg_size;
+    Uint cache_hits;
+
+    struct {
+	struct {
+	    Uint watermark;
+	    Uint no;
+	    Uint sz;
+	} current;
+	struct {
+	    Uint no;
+	    Uint sz;
+	} max;
+	struct {
+	    Uint no;
+	    Uint sz;
+	} max_ever;
+    } segments;
+
+    const char* name;
+    MemKind* next;
+};/*MemKind*/
+
+#if HALFWORD_HEAP
+static MemKind low_mem, hi_mem;
+#else
+static MemKind the_mem;
+#endif
+static MemKind* mk_list = NULL;
 
 static Uint max_cache_size;
 static Uint abs_max_cache_bad_fit;
@@ -176,47 +208,32 @@ static Uint rel_max_cache_bad_fit;
 static Uint min_seg_size;
 #endif
 
-struct {
-    struct {
-	Uint watermark;
-	Uint no;
-	Uint sz;
-    } current;
-    struct {
-	Uint no;
-	Uint sz;
-    } max;
-    struct {
-	Uint no;
-	Uint sz;
-    } max_ever;
-} segments;
 
-#define ERTS_MSEG_ALLOC_STAT(SZ)					\
+#define ERTS_MSEG_ALLOC_STAT(C,SZ)					\
 do {									\
-    segments.current.no++;						\
-    if (segments.max.no < segments.current.no)				\
-	segments.max.no = segments.current.no;				\
-    if (segments.current.watermark < segments.current.no)		\
-	segments.current.watermark = segments.current.no;		\
-    segments.current.sz += (SZ);					\
-    if (segments.max.sz < segments.current.sz)				\
-	segments.max.sz = segments.current.sz;				\
+    C->segments.current.no++;						\
+    if (C->segments.max.no < C->segments.current.no)			\
+	C->segments.max.no = C->segments.current.no;			\
+    if (C->segments.current.watermark < C->segments.current.no)		\
+	C->segments.current.watermark = C->segments.current.no;		\
+    C->segments.current.sz += (SZ);					\
+    if (C->segments.max.sz < C->segments.current.sz)			\
+	C->segments.max.sz = C->segments.current.sz;			\
 } while (0)
 
-#define ERTS_MSEG_DEALLOC_STAT(SZ)					\
+#define ERTS_MSEG_DEALLOC_STAT(C,SZ)					\
 do {									\
-    ASSERT(segments.current.no > 0);					\
-    segments.current.no--;						\
-    ASSERT(segments.current.sz >= (SZ));				\
-    segments.current.sz -= (SZ);					\
+    ASSERT(C->segments.current.no > 0);					\
+    C->segments.current.no--;						\
+    ASSERT(C->segments.current.sz >= (SZ));				\
+    C->segments.current.sz -= (SZ);					\
 } while (0) 
 
-#define ERTS_MSEG_REALLOC_STAT(OSZ, NSZ)				\
+#define ERTS_MSEG_REALLOC_STAT(C,OSZ, NSZ)				\
 do {									\
-    ASSERT(segments.current.sz >= (OSZ));				\
-    segments.current.sz -= (OSZ);					\
-    segments.current.sz += (NSZ);					\
+    ASSERT(C->segments.current.sz >= (OSZ));				\
+    C->segments.current.sz -= (OSZ);					\
+    C->segments.current.sz += (NSZ);					\
 } while (0)
 
 #define ONE_GIGA (1000000000)
@@ -271,7 +288,7 @@ schedule_cache_check(void)
 #endif
 	{
 	    cache_check_timer.active = 0;
-	    erl_set_timer(&cache_check_timer,
+	    erts_set_timer(&cache_check_timer,
 			  check_cache,
 			  NULL,
 			  NULL,
@@ -302,13 +319,16 @@ check_schedule_cache_check(void)
 static void
 mseg_shutdown(void)
 {
+    MemKind* mk;
     erts_mtx_lock(&mseg_mutex);
-    mseg_clear_cache();
+    for (mk=mk_list; mk; mk=mk->next) {
+	mseg_clear_cache(mk);
+    }
     erts_mtx_unlock(&mseg_mutex);
 }
 
 static ERTS_INLINE void *
-mseg_create(Uint size)
+mseg_create(MemKind* mk, Uint size)
 {
     void *seg;
 
@@ -318,19 +338,21 @@ mseg_create(Uint size)
     seg = erts_sys_alloc(ERTS_ALC_N_INVALID, NULL, size);
 #elif HAVE_MMAP
 #if HALFWORD_HEAP
-    seg = pmmap(size);
-#else
-    seg = (void *) mmap((void *) 0, (size_t) size,
-			MMAP_PROT, MMAP_FLAGS, MMAP_FD, 0);
-    if (seg == (void *) MAP_FAILED)
-	seg = NULL;
-#endif
-#if HALFWORD_HEAP
-    if ((unsigned long) seg & CHECK_POINTER_MASK) {
-	erts_fprintf(stderr,"Pointer mask failure (0x%08lx)\n",(unsigned long) seg);
-	return NULL;
+    if (mk == &low_mem) {
+	seg = pmmap(size);
+	if ((unsigned long) seg & CHECK_POINTER_MASK) {
+	    erts_fprintf(stderr,"Pointer mask failure (0x%08lx)\n",(unsigned long) seg);
+	    return NULL;
+	}
     }
+    else
 #endif
+    {
+	seg = (void *) mmap((void *) 0, (size_t) size,
+			    MMAP_PROT, MMAP_FLAGS, MMAP_FD, 0);
+	if (seg == (void *) MAP_FAILED)
+	    seg = NULL;
+    }
 #else
 #error "Missing mseg_create() implementation"
 #endif
@@ -341,20 +363,23 @@ mseg_create(Uint size)
 }
 
 static ERTS_INLINE void
-mseg_destroy(void *seg, Uint size)
+mseg_destroy(MemKind* mk, void *seg, Uint size)
 {
 #if defined(ERTS_MSEG_FAKE_SEGMENTS)
     erts_sys_free(ERTS_ALC_N_INVALID, NULL, seg);
 #elif HAVE_MMAP
+    int res;
 
-#ifdef DEBUG
-    int res =
-#endif
 #if HALFWORD_HEAP
-	pmunmap((void *) seg, size);
-#else
-	munmap((void *) seg, size);
+    if (mk == &low_mem) {
+	res = pmunmap((void *) seg, size);
+    }
+    else
 #endif
+    {
+	res = munmap((void *) seg, size);
+    }
+
     ASSERT(size % page_size == 0);
     ASSERT(res == 0);
 #else
@@ -368,7 +393,7 @@ mseg_destroy(void *seg, Uint size)
 #if HAVE_MSEG_RECREATE
 
 static ERTS_INLINE void *
-mseg_recreate(void *old_seg, Uint old_size, Uint new_size)
+mseg_recreate(MemKind* mk, void *old_seg, Uint old_size, Uint new_size)
 {
     void *new_seg;
 
@@ -379,25 +404,29 @@ mseg_recreate(void *old_seg, Uint old_size, Uint new_size)
     new_seg = erts_sys_realloc(ERTS_ALC_N_INVALID, NULL, old_seg, new_size);
 #elif HAVE_MREMAP
 #if HALFWORD_HEAP
-     new_seg = (void *) pmremap((void *) old_seg,
-				(size_t) old_size,
-				(size_t) new_size);
-#elif defined(__NetBSD__)
-    new_seg = (void *) mremap((void *) old_seg,
-			      (size_t) old_size,
-			      NULL,
-			      (size_t) new_size,
-			      0);
-    if (new_seg == (void *) MAP_FAILED)
-	new_seg = NULL;
-#else
-    new_seg = (void *) mremap((void *) old_seg,
-			      (size_t) old_size,
-			      (size_t) new_size,
-			      MREMAP_MAYMOVE);
-    if (new_seg == (void *) MAP_FAILED)
-	new_seg = NULL;
+    if (mk == &low_mem) {
+	new_seg = (void *) pmremap((void *) old_seg,
+				   (size_t) old_size,
+				   (size_t) new_size);
+    }
+    else
 #endif
+    {
+    #if defined(__NetBSD__)
+	new_seg = (void *) mremap((void *) old_seg,
+				  (size_t) old_size,
+				  NULL,
+				  (size_t) new_size,
+				  0);
+    #else
+	new_seg = (void *) mremap((void *) old_seg,
+				  (size_t) old_size,
+				  (size_t) new_size,
+				  MREMAP_MAYMOVE);
+    #endif
+	if (new_seg == (void *) MAP_FAILED)
+	    new_seg = NULL;
+    }
 #else
 #error "Missing mseg_recreate() implementation"
 #endif
@@ -411,134 +440,142 @@ mseg_recreate(void *old_seg, Uint old_size, Uint new_size)
 
 
 static ERTS_INLINE cache_desc_t * 
-alloc_cd(void)
+alloc_cd(MemKind* mk)
 {    
-    cache_desc_t *cd = free_cache_descs;
+    cache_desc_t *cd = mk->free_cache_descs;
     ERTS_LC_ASSERT(erts_lc_mtx_is_locked(&mseg_mutex));
     if (cd)
-	free_cache_descs = cd->next;
+	mk->free_cache_descs = cd->next;
     return cd;
 }
 
 static ERTS_INLINE void
-free_cd(cache_desc_t *cd)
+free_cd(MemKind* mk, cache_desc_t *cd)
 {
     ERTS_LC_ASSERT(erts_lc_mtx_is_locked(&mseg_mutex));
-    cd->next = free_cache_descs;
-    free_cache_descs = cd;
+    cd->next = mk->free_cache_descs;
+    mk->free_cache_descs = cd;
 }
 
 
 static ERTS_INLINE void
-link_cd(cache_desc_t *cd)
+link_cd(MemKind* mk, cache_desc_t *cd)
 {
     ERTS_LC_ASSERT(erts_lc_mtx_is_locked(&mseg_mutex));
-    if (cache)
-	cache->prev = cd;
-    cd->next = cache;
+    if (mk->cache)
+	mk->cache->prev = cd;
+    cd->next = mk->cache;
     cd->prev = NULL;
-    cache = cd;
+    mk->cache = cd;
 
-    if (!cache_end) {
+    if (!mk->cache_end) {
 	ASSERT(!cd->next);
-	cache_end = cd;
+	mk->cache_end = cd;
     }
 
-    cache_size++;
+    mk->cache_size++;
 }
 
+#if CAN_PARTLY_DESTROY
 static ERTS_INLINE void
-end_link_cd(cache_desc_t *cd)
+end_link_cd(MemKind* mk, cache_desc_t *cd)
 {
     ERTS_LC_ASSERT(erts_lc_mtx_is_locked(&mseg_mutex));
-    if (cache_end)
-	cache_end->next = cd;
+    if (mk->cache_end)
+	mk->cache_end->next = cd;
     cd->next = NULL;
-    cd->prev = cache_end;
-    cache_end = cd;
+    cd->prev = mk->cache_end;
+    mk->cache_end = cd;
 
-    if (!cache) {
+    if (!mk->cache) {
 	ASSERT(!cd->prev);
-	cache = cd;
+	mk->cache = cd;
     }
 
-    cache_size++;
+    mk->cache_size++;
 }
+#endif
 
 static ERTS_INLINE void
-unlink_cd(cache_desc_t *cd)
+unlink_cd(MemKind* mk, cache_desc_t *cd)
 {
     ERTS_LC_ASSERT(erts_lc_mtx_is_locked(&mseg_mutex));
     if (cd->next)
 	cd->next->prev = cd->prev;
     else
-	cache_end = cd->prev;
+	mk->cache_end = cd->prev;
     
     if (cd->prev)
 	cd->prev->next = cd->next;
     else
-	cache = cd->next;
-    ASSERT(cache_size > 0);
-    cache_size--;
+	mk->cache = cd->next;
+    ASSERT(mk->cache_size > 0);
+    mk->cache_size--;
 }
 
 static ERTS_INLINE void
-check_cache_limits(void)
+check_cache_limits(MemKind* mk)
 {
     cache_desc_t *cd;
     ERTS_LC_ASSERT(erts_lc_mtx_is_locked(&mseg_mutex));
-    max_cached_seg_size = 0;
-    min_cached_seg_size = ~((Uint) 0);
-    for (cd = cache; cd; cd = cd->next) {
-	if (cd->size < min_cached_seg_size)
-	    min_cached_seg_size = cd->size;
-	if (cd->size > max_cached_seg_size)
-	    max_cached_seg_size = cd->size;
+    mk->max_cached_seg_size = 0;
+    mk->min_cached_seg_size = ~((Uint) 0);
+    for (cd = mk->cache; cd; cd = cd->next) {
+	if (cd->size < mk->min_cached_seg_size)
+	    mk->min_cached_seg_size = cd->size;
+	if (cd->size > mk->max_cached_seg_size)
+	    mk->max_cached_seg_size = cd->size;
     }
-
 }
 
 static ERTS_INLINE void
-adjust_cache_size(int force_check_limits)
+adjust_cache_size(MemKind* mk, int force_check_limits)
 {
     cache_desc_t *cd;
     int check_limits = force_check_limits;
-    Sint max_cached = ((Sint) segments.current.watermark
-		       - (Sint) segments.current.no);
+    Sint max_cached = ((Sint) mk->segments.current.watermark
+		       - (Sint) mk->segments.current.no);
     ERTS_LC_ASSERT(erts_lc_mtx_is_locked(&mseg_mutex));
-    while (((Sint) cache_size) > max_cached && ((Sint) cache_size) > 0) {
-	ASSERT(cache_end);
-	cd = cache_end;
+    while (((Sint) mk->cache_size) > max_cached && ((Sint) mk->cache_size) > 0) {
+	ASSERT(mk->cache_end);
+	cd = mk->cache_end;
 	if (!check_limits &&
-	    !(min_cached_seg_size < cd->size
-	      && cd->size < max_cached_seg_size)) {
+	    !(mk->min_cached_seg_size < cd->size
+	      && cd->size < mk->max_cached_seg_size)) {
 	    check_limits = 1;
 	}
 	if (erts_mtrace_enabled)
 	    erts_mtrace_crr_free(SEGTYPE, SEGTYPE, cd->seg);
-	mseg_destroy(cd->seg, cd->size);
-	unlink_cd(cd);
-	free_cd(cd);
+	mseg_destroy(mk, cd->seg, cd->size);
+	unlink_cd(mk,cd);
+	free_cd(mk,cd);
     }
 
     if (check_limits)
-	check_cache_limits();
-
+	check_cache_limits(mk);
 }
 
 static void
-check_cache(void *unused)
+check_one_cache(MemKind* mk)
 {
+    if (mk->segments.current.watermark > mk->segments.current.no)
+	mk->segments.current.watermark--;
+    adjust_cache_size(mk, 0);
+
+    if (mk->cache_size)
+	schedule_cache_check();
+}
+
+static void check_cache(void* unused)
+{
+    MemKind* mk;
     erts_mtx_lock(&mseg_mutex);
 
     is_cache_check_scheduled = 0;
 
-    if (segments.current.watermark > segments.current.no)
-	segments.current.watermark--;
-    adjust_cache_size(0);
-
-    if (cache_size)
-	schedule_cache_check();
+    for (mk=mk_list; mk; mk=mk->next) {
+	check_one_cache(mk);
+    }
 
     INC_CC(check_cache);
 
@@ -546,28 +583,45 @@ check_cache(void *unused)
 }
 
 static void
-mseg_clear_cache(void)
+mseg_clear_cache(MemKind* mk)
 {
-    segments.current.watermark = 0;
+    mk->segments.current.watermark = 0;
 
-    adjust_cache_size(1);
+    adjust_cache_size(mk, 1);
 
-    ASSERT(!cache);
-    ASSERT(!cache_end);
-    ASSERT(!cache_size);
+    ASSERT(!mk->cache);
+    ASSERT(!mk->cache_end);
+    ASSERT(!mk->cache_size);
 
-    segments.current.watermark = segments.current.no;
+    mk->segments.current.watermark = mk->segments.current.no;
 
     INC_CC(clear_cache);
 }
 
+static ERTS_INLINE MemKind* type2mk(ErtsAlcType_t atype)
+{
+#if HALFWORD_HEAP
+    switch (atype) {
+    case ERTS_ALC_A_ETS:
+    case ERTS_ALC_A_BINARY:
+    case ERTS_ALC_A_FIXED_SIZE:
+    case ERTS_ALC_A_DRIVER:
+	return &hi_mem;
+    default:
+	return &low_mem;
+    }
+#else
+    return &the_mem;
+#endif
+}
+
 static void *
 mseg_alloc(ErtsAlcType_t atype, Uint *size_p, const ErtsMsegOpt_t *opt)
 {
-
     Uint max, min, diff_size, size;
     cache_desc_t *cd, *cand_cd;
     void *seg;
+    MemKind* mk = type2mk(atype);
 
     INC_CC(alloc);
 
@@ -580,11 +634,11 @@ mseg_alloc(ErtsAlcType_t atype, Uint *size_p, const ErtsMsegOpt_t *opt)
 
     if (!opt->cache) {
     create_seg:
-	adjust_cache_size(0);
-	seg = mseg_create(size);
+	adjust_cache_size(mk,0);
+	seg = mseg_create(mk, size);
 	if (!seg) {
-	    mseg_clear_cache();
-	    seg = mseg_create(size);
+	    mseg_clear_cache(mk);
+	    seg = mseg_create(mk, size);
 	    if (!seg)
 		size = 0;
 	}
@@ -593,17 +647,17 @@ mseg_alloc(ErtsAlcType_t atype, Uint *size_p, const ErtsMsegOpt_t *opt)
 	if (seg) {
 	    if (erts_mtrace_enabled)
 		erts_mtrace_crr_alloc(seg, atype, ERTS_MTRACE_SEGMENT_ID, size);
-	    ERTS_MSEG_ALLOC_STAT(size);
+	    ERTS_MSEG_ALLOC_STAT(mk,size);
 	}
 	return seg;
     }
 
-    if (size > max_cached_seg_size)
+    if (size > mk->max_cached_seg_size)
 	goto create_seg;
 
-    if (size < min_cached_seg_size) {
+    if (size < mk->min_cached_seg_size) {
 
-	diff_size = min_cached_seg_size - size;
+	diff_size = mk->min_cached_seg_size - size;
 
 	if (diff_size > abs_max_cache_bad_fit)
 	    goto create_seg;
@@ -617,7 +671,7 @@ mseg_alloc(ErtsAlcType_t atype, Uint *size_p, const ErtsMsegOpt_t *opt)
     min = ~((Uint) 0);
     cand_cd = NULL;
 
-    for (cd = cache; cd; cd = cd->next) {
+    for (cd = mk->cache; cd; cd = cd->next) {
 	if (cd->size >= size) {
 	    if (!cand_cd) {
 		cand_cd = cd;
@@ -638,8 +692,8 @@ mseg_alloc(ErtsAlcType_t atype, Uint *size_p, const ErtsMsegOpt_t *opt)
 	    min = cd->size;
     }
 
-    min_cached_seg_size = min;
-    max_cached_seg_size = max;
+    mk->min_cached_seg_size = min;
+    mk->max_cached_seg_size = max;
 
     if (!cand_cd)
 	goto create_seg;
@@ -648,20 +702,20 @@ mseg_alloc(ErtsAlcType_t atype, Uint *size_p, const ErtsMsegOpt_t *opt)
 
     if (diff_size > abs_max_cache_bad_fit
 	|| 100*PAGES(diff_size) > rel_max_cache_bad_fit*PAGES(size)) {
-	if (max_cached_seg_size < cand_cd->size)	
-	    max_cached_seg_size = cand_cd->size;
-	if (min_cached_seg_size > cand_cd->size)
-	    min_cached_seg_size = cand_cd->size;
+	if (mk->max_cached_seg_size < cand_cd->size)
+	    mk->max_cached_seg_size = cand_cd->size;
+	if (mk->min_cached_seg_size > cand_cd->size)
+	    mk->min_cached_seg_size = cand_cd->size;
 	goto create_seg;
     }
 
-    cache_hits++;
+    mk->cache_hits++;
 
     size = cand_cd->size;
     seg = cand_cd->seg;
 
-    unlink_cd(cand_cd);
-    free_cd(cand_cd);
+    unlink_cd(mk,cand_cd);
+    free_cd(mk,cand_cd);
 
     *size_p = size;
 
@@ -671,7 +725,7 @@ mseg_alloc(ErtsAlcType_t atype, Uint *size_p, const ErtsMsegOpt_t *opt)
     }
 
     if (seg)
-	ERTS_MSEG_ALLOC_STAT(size);
+	ERTS_MSEG_ALLOC_STAT(mk,size);
     return seg;
 }
 
@@ -680,41 +734,42 @@ static void
 mseg_dealloc(ErtsAlcType_t atype, void *seg, Uint size,
 	     const ErtsMsegOpt_t *opt)
 {
+    MemKind* mk = type2mk(atype);
     cache_desc_t *cd;
 
-    ERTS_MSEG_DEALLOC_STAT(size);
+    ERTS_MSEG_DEALLOC_STAT(mk,size);
 
     if (!opt->cache || max_cache_size == 0) {
 	if (erts_mtrace_enabled)
 	    erts_mtrace_crr_free(atype, SEGTYPE, seg);
-	mseg_destroy(seg, size);
+	mseg_destroy(mk, seg, size);
     }
     else {
 	int check_limits = 0;
 	
-	if (size < min_cached_seg_size)
-	    min_cached_seg_size = size;
-	if (size > max_cached_seg_size)
-	    max_cached_seg_size = size;
-
-	if (!free_cache_descs) {
-	    cd = cache_end;
-	    if (!(min_cached_seg_size < cd->size
-		  && cd->size < max_cached_seg_size)) {
+	if (size < mk->min_cached_seg_size)
+	    mk->min_cached_seg_size = size;
+	if (size > mk->max_cached_seg_size)
+	    mk->max_cached_seg_size = size;
+
+	if (!mk->free_cache_descs) {
+	    cd = mk->cache_end;
+	    if (!(mk->min_cached_seg_size < cd->size
+		  && cd->size < mk->max_cached_seg_size)) {
 		check_limits = 1;
 	    }
 	    if (erts_mtrace_enabled)
 		erts_mtrace_crr_free(SEGTYPE, SEGTYPE, cd->seg);
-	    mseg_destroy(cd->seg, cd->size);
-	    unlink_cd(cd);
-	    free_cd(cd);
+	    mseg_destroy(mk, cd->seg, cd->size);
+	    unlink_cd(mk,cd);
+	    free_cd(mk,cd);
 	}
 
-	cd = alloc_cd();
+	cd = alloc_cd(mk);
 	ASSERT(cd);
 	cd->seg = seg;
 	cd->size = size;
-	link_cd(cd);
+	link_cd(mk,cd);
 
 	if (erts_mtrace_enabled) {
 	    erts_mtrace_crr_free(atype, SEGTYPE, seg);
@@ -724,7 +779,7 @@ mseg_dealloc(ErtsAlcType_t atype, void *seg, Uint size,
 	/* ASSERT(segments.current.watermark >= segments.current.no + cache_size); */
 
 	if (check_limits)
-	    check_cache_limits();
+	    check_cache_limits(mk);
 
 	schedule_cache_check();
 
@@ -737,6 +792,7 @@ static void *
 mseg_realloc(ErtsAlcType_t atype, void *seg, Uint old_size, Uint *new_size_p,
 	     const ErtsMsegOpt_t *opt)
 {
+    MemKind* mk = type2mk(atype);
     void *new_seg;
     Uint new_size;
 
@@ -774,15 +830,15 @@ mseg_realloc(ErtsAlcType_t atype, void *seg, Uint old_size, Uint *new_size_p,
 #if CAN_PARTLY_DESTROY
 
 	    if (shrink_sz > min_seg_size
-		&& free_cache_descs
+		&& mk->free_cache_descs
 		&& opt->cache) {
 		cache_desc_t *cd;
 
-		cd = alloc_cd();
+		cd = alloc_cd(mk);
 		ASSERT(cd);
 		cd->seg = ((char *) seg) + new_size;
 		cd->size = shrink_sz;
-		end_link_cd(cd);
+		end_link_cd(mk,cd);
 
 		if (erts_mtrace_enabled) {
 		    erts_mtrace_crr_realloc(new_seg,
@@ -801,7 +857,7 @@ mseg_realloc(ErtsAlcType_t atype, void *seg, Uint old_size, Uint *new_size_p,
 					    SEGTYPE,
 					    seg,
 					    new_size);
-		mseg_destroy(((char *) seg) + new_size, shrink_sz);
+		mseg_destroy(mk, ((char *) seg) + new_size, shrink_sz);
 	    }
 
 #elif HAVE_MSEG_RECREATE
@@ -835,7 +891,7 @@ mseg_realloc(ErtsAlcType_t atype, void *seg, Uint old_size, Uint *new_size_p,
 #if !CAN_PARTLY_DESTROY
 	do_recreate:
 #endif
-	    new_seg = mseg_recreate((void *) seg, old_size, new_size);
+	    new_seg = mseg_recreate(mk, (void *) seg, old_size, new_size);
 	    if (erts_mtrace_enabled)
 		erts_mtrace_crr_realloc(new_seg, atype, SEGTYPE, seg, new_size);
 	    if (!new_seg)
@@ -858,7 +914,7 @@ mseg_realloc(ErtsAlcType_t atype, void *seg, Uint old_size, Uint *new_size_p,
 
     *new_size_p = new_size;
 
-    ERTS_MSEG_REALLOC_STAT(old_size, new_size);
+    ERTS_MSEG_REALLOC_STAT(mk, old_size, new_size);
 
     return new_seg;
 }
@@ -874,6 +930,8 @@ static struct {
     Eterm mcs;
     Eterm cci;
 
+    Eterm memkind;
+    Eterm name;
     Eterm status;
     Eterm cached_segments;
     Eterm cache_hits;
@@ -923,6 +981,8 @@ init_atoms(void)
 #endif
 
 	AM_INIT(version);
+	AM_INIT(memkind);
+	AM_INIT(name);
 
 	AM_INIT(options);
 	AM_INIT(amcbf);
@@ -1133,65 +1193,88 @@ info_calls(int *print_to_p, void *print_to_arg, Uint **hpp, Uint *szp)
 }
 
 static Eterm
-info_status(int *print_to_p,
-	    void *print_to_arg,
-	    int begin_new_max_period,
-	    Uint **hpp,
-	    Uint *szp)
+info_status(MemKind* mk, int *print_to_p, void *print_to_arg,
+	    int begin_new_max_period, Uint **hpp, Uint *szp)
 {
     Eterm res = THE_NON_VALUE;
     
-    if (segments.max_ever.no < segments.max.no)
-	segments.max_ever.no = segments.max.no;
-    if (segments.max_ever.sz < segments.max.sz)
-	segments.max_ever.sz = segments.max.sz;
+    if (mk->segments.max_ever.no < mk->segments.max.no)
+	mk->segments.max_ever.no = mk->segments.max.no;
+    if (mk->segments.max_ever.sz < mk->segments.max.sz)
+	mk->segments.max_ever.sz = mk->segments.max.sz;
 
     if (print_to_p) {
 	int to = *print_to_p;
 	void *arg = print_to_arg;
 
-	erts_print(to, arg, "cached_segments: %bpu\n", cache_size);
-	erts_print(to, arg, "cache_hits: %bpu\n", cache_hits);
+	erts_print(to, arg, "cached_segments: %bpu\n", mk->cache_size);
+	erts_print(to, arg, "cache_hits: %bpu\n", mk->cache_hits);
 	erts_print(to, arg, "segments: %bpu %bpu %bpu\n",
-		   segments.current.no, segments.max.no, segments.max_ever.no);
+		   mk->segments.current.no, mk->segments.max.no, mk->segments.max_ever.no);
 	erts_print(to, arg, "segments_size: %bpu %bpu %bpu\n",
-		   segments.current.sz, segments.max.sz, segments.max_ever.sz);
+		   mk->segments.current.sz, mk->segments.max.sz, mk->segments.max_ever.sz);
 	erts_print(to, arg, "segments_watermark: %bpu\n",
-		   segments.current.watermark);
+		   mk->segments.current.watermark);
     }
 
     if (hpp || szp) {
 	res = NIL;
 	add_2tup(hpp, szp, &res,
 		 am.segments_watermark,
-		 bld_unstable_uint(hpp, szp, segments.current.watermark));
+		 bld_unstable_uint(hpp, szp, mk->segments.current.watermark));
 	add_4tup(hpp, szp, &res,
 		 am.segments_size,
-		 bld_unstable_uint(hpp, szp, segments.current.sz),
-		 bld_unstable_uint(hpp, szp, segments.max.sz),
-		 bld_unstable_uint(hpp, szp, segments.max_ever.sz));
+		 bld_unstable_uint(hpp, szp, mk->segments.current.sz),
+		 bld_unstable_uint(hpp, szp, mk->segments.max.sz),
+		 bld_unstable_uint(hpp, szp, mk->segments.max_ever.sz));
 	add_4tup(hpp, szp, &res,
 		 am.segments,
-		 bld_unstable_uint(hpp, szp, segments.current.no),
-		 bld_unstable_uint(hpp, szp, segments.max.no),
-		 bld_unstable_uint(hpp, szp, segments.max_ever.no));
+		 bld_unstable_uint(hpp, szp, mk->segments.current.no),
+		 bld_unstable_uint(hpp, szp, mk->segments.max.no),
+		 bld_unstable_uint(hpp, szp, mk->segments.max_ever.no));
 	add_2tup(hpp, szp, &res,
 		 am.cache_hits,
-		 bld_unstable_uint(hpp, szp, cache_hits));
+		 bld_unstable_uint(hpp, szp, mk->cache_hits));
 	add_2tup(hpp, szp, &res,
 		 am.cached_segments,
-		 bld_unstable_uint(hpp, szp, cache_size));
+		 bld_unstable_uint(hpp, szp, mk->cache_size));
 
     }
 
     if (begin_new_max_period) {
-	segments.max.no = segments.current.no;
-	segments.max.sz = segments.current.sz;
+	mk->segments.max.no = mk->segments.current.no;
+	mk->segments.max.sz = mk->segments.current.sz;
     }
 
     return res;
 }
 
+static Eterm info_memkind(MemKind* mk, int *print_to_p, void *print_to_arg,
+			  int begin_max_per, Uint **hpp, Uint *szp)
+{
+    Eterm res = THE_NON_VALUE;
+    Eterm atoms[3];
+    Eterm values[3];
+
+    if (print_to_p) {
+	erts_print(*print_to_p, print_to_arg, "memory kind: %s\n", mk->name);
+    }
+    if (hpp || szp) {
+	atoms[0] = am.name;
+	atoms[1] = am.status;
+	atoms[2] = am.calls;
+	values[0] = erts_bld_string(hpp, szp, mk->name);
+    }
+    values[1] = info_status(mk, print_to_p, print_to_arg, begin_max_per, hpp, szp);
+    values[2] = info_calls(print_to_p, print_to_arg, hpp, szp);
+
+    if (hpp || szp)
+	res = bld_2tup_list(hpp, szp, 3, atoms, values);
+
+    return res;
+}
+
+
 static Eterm
 info_version(int *print_to_p, void *print_to_arg, Uint **hpp, Uint *szp)
 {
@@ -1238,6 +1321,7 @@ erts_mseg_info(int *print_to_p,
     Eterm res = THE_NON_VALUE;
     Eterm atoms[4];
     Eterm values[4];
+    Uint n = 0;
 
     erts_mtx_lock(&mseg_mutex);
 
@@ -1248,17 +1332,19 @@ erts_mseg_info(int *print_to_p,
 
 	atoms[0] = am.version;
 	atoms[1] = am.options;
-	atoms[2] = am.status;
-	atoms[3] = am.calls;
+	atoms[2] = am.memkind;
+	atoms[3] = am.memkind;
     }
-
-    values[0] = info_version(print_to_p, print_to_arg, hpp, szp);
-    values[1] = info_options("option ", print_to_p, print_to_arg, hpp, szp);
-    values[2] = info_status(print_to_p, print_to_arg, begin_max_per, hpp, szp);
-    values[3] = info_calls(print_to_p, print_to_arg, hpp, szp);
-
+    values[n++] = info_version(print_to_p, print_to_arg, hpp, szp);
+    values[n++] = info_options("option ", print_to_p, print_to_arg, hpp, szp);
+#if HALFWORD_HEAP
+    values[n++] = info_memkind(&low_mem, print_to_p, print_to_arg, begin_max_per, hpp, szp);
+    values[n++] = info_memkind(&hi_mem, print_to_p, print_to_arg, begin_max_per, hpp, szp);
+#else
+    values[n++] = info_memkind(&the_mem, print_to_p, print_to_arg, begin_max_per, hpp, szp);
+#endif
     if (hpp || szp)
-	res = bld_2tup_list(hpp, szp, 4, atoms, values);
+	res = bld_2tup_list(hpp, szp, n, atoms, values);
 
     erts_mtx_unlock(&mseg_mutex);
 
@@ -1317,17 +1403,23 @@ erts_mseg_realloc(ErtsAlcType_t atype, void *seg, Uint old_size,
 void
 erts_mseg_clear_cache(void)
 {
+    MemKind* mk;
     erts_mtx_lock(&mseg_mutex);
-    mseg_clear_cache();
+    for (mk=mk_list; mk; mk=mk->next) {
+	mseg_clear_cache(mk);
+    }
     erts_mtx_unlock(&mseg_mutex);
 }
 
 Uint
 erts_mseg_no(void)
 {
-    Uint n;
+    MemKind* mk;
+    Uint n = 0;
     erts_mtx_lock(&mseg_mutex);
-    n = segments.current.no;
+    for (mk=mk_list; mk; mk=mk->next) {
+	n += mk->segments.current.no;
+    }
     erts_mtx_unlock(&mseg_mutex);
     return n;
 }
@@ -1338,11 +1430,43 @@ erts_mseg_unit_size(void)
     return page_size;
 }
 
-void
-erts_mseg_init(ErtsMsegInit_t *init)
+static void mem_kind_init(MemKind* mk, const char* name)
 {
     unsigned i;
 
+    mk->cache = NULL;
+    mk->cache_end = NULL;
+    mk->max_cached_seg_size = 0;
+    mk->min_cached_seg_size = ~((Uint) 0);
+    mk->cache_size = 0;
+    mk->cache_hits = 0;
+
+    if (max_cache_size > 0) {
+	for (i = 0; i < max_cache_size - 1; i++)
+	    mk->cache_descs[i].next = &mk->cache_descs[i + 1];
+	mk->cache_descs[max_cache_size - 1].next = NULL;
+	mk->free_cache_descs = &mk->cache_descs[0];
+    }
+    else
+	mk->free_cache_descs = NULL;
+
+    mk->segments.current.watermark = 0;
+    mk->segments.current.no = 0;
+    mk->segments.current.sz = 0;
+    mk->segments.max.no = 0;
+    mk->segments.max.sz = 0;
+    mk->segments.max_ever.no = 0;
+    mk->segments.max_ever.sz = 0;
+
+    mk->name = name;
+    mk->next = mk_list;
+    mk_list = mk;
+}
+
+
+void
+erts_mseg_init(ErtsMsegInit_t *init)
+{
     atoms_initialized = 0;
     is_init_done = 0;
 
@@ -1385,40 +1509,33 @@ erts_mseg_init(ErtsMsegInit_t *init)
     min_seg_size = ~((Uint) 0);
 #endif
 
-    cache = NULL;
-    cache_end = NULL;
-    cache_hits = 0;
-    max_cached_seg_size = 0;
-    min_cached_seg_size = ~((Uint) 0);
-    cache_size = 0;
+    if (max_cache_size > MAX_CACHE_SIZE)
+	max_cache_size = MAX_CACHE_SIZE;
+
+#if HALFWORD_HEAP
+    mem_kind_init(&low_mem, "low memory");
+    mem_kind_init(&hi_mem, "high memory");
+#else
+    mem_kind_init(&the_mem, "all memory");
+#endif
 
     is_cache_check_scheduled = 0;
 #ifdef ERTS_THREADS_NO_SMP
     is_cache_check_requested = 0;
 #endif
+}
 
-    if (max_cache_size > MAX_CACHE_SIZE)
-	max_cache_size = MAX_CACHE_SIZE;
 
-    if (max_cache_size > 0) {
-	for (i = 0; i < max_cache_size - 1; i++)
-	    cache_descs[i].next = &cache_descs[i + 1];
-	cache_descs[max_cache_size - 1].next = NULL;
-	free_cache_descs = &cache_descs[0];
+static ERTS_INLINE Uint tot_cache_size(void)
+{
+    MemKind* mk;
+    Uint sz = 0;
+    for (mk=mk_list; mk; mk=mk->next) {
+	sz += mk->cache_size;
     }
-    else
-	free_cache_descs = NULL;
-
-    segments.current.watermark = 0;
-    segments.current.no = 0;
-    segments.current.sz = 0;
-    segments.max.no = 0;
-    segments.max.sz = 0;
-    segments.max_ever.no = 0;
-    segments.max_ever.sz = 0;
+    return sz;
 }
 
-
 /*
  * erts_mseg_late_init() have to be called after all allocators,
  * threads and timers have been initialized.
@@ -1436,7 +1553,7 @@ erts_mseg_late_init(void)
 #ifdef ERTS_THREADS_NO_SMP
     async_handle = handle;
 #endif
-    if (cache_size)
+    if (tot_cache_size())
 	schedule_cache_check();
     erts_mtx_unlock(&mseg_mutex);
 }
@@ -1477,7 +1594,7 @@ erts_mseg_test(unsigned long op,
     case 0x406: {
 	unsigned long res;
 	erts_mtx_lock(&mseg_mutex);
-	res = (unsigned long) cache_size;
+	res = (unsigned long) tot_cache_size();
 	erts_mtx_unlock(&mseg_mutex);
 	return res;
     }
@@ -1756,6 +1873,7 @@ static int pmunmap(void *p, size_t size)
     FreeBlock *last;
     FreeBlock *nb = (FreeBlock *) p;
 
+    ASSERT(((unsigned long)p & CHECK_POINTER_MASK)==0);
     if (real_size > pagsz) {
 	if (do_unmap(((char *) p) + pagsz,real_size - pagsz)) {
 	    return 1;
diff --git a/erts/emulator/sys/common/erl_poll.c b/erts/emulator/sys/common/erl_poll.c
index 4d0ca97889..77ac2de5f6 100644
--- a/erts/emulator/sys/common/erl_poll.c
+++ b/erts/emulator/sys/common/erl_poll.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2006-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2006-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -124,25 +124,11 @@
   erts_smp_mtx_unlock(&(PS)->mtx)
 
 #define ERTS_POLLSET_SET_POLLED_CHK(PS) \
-  ((int) erts_smp_atomic_xchg(&(PS)->polled, (erts_aint_t) 1))
+  ((int) erts_atomic32_xchg(&(PS)->polled, (erts_aint32_t) 1))
 #define ERTS_POLLSET_UNSET_POLLED(PS) \
-  erts_smp_atomic_set(&(PS)->polled, (erts_aint_t) 0)
+  erts_atomic32_set(&(PS)->polled, (erts_aint32_t) 0)
 #define ERTS_POLLSET_IS_POLLED(PS) \
-  ((int) erts_smp_atomic_read(&(PS)->polled))
-
-#define ERTS_POLLSET_SET_POLLER_WOKEN_CHK(PS) set_poller_woken_chk((PS))
-#define ERTS_POLLSET_SET_POLLER_WOKEN(PS) 				\
-do {									\
-      ERTS_THR_MEMORY_BARRIER;						\
-      erts_smp_atomic_set(&(PS)->woken, (erts_aint_t) 1);		\
-} while (0)
-#define ERTS_POLLSET_UNSET_POLLER_WOKEN(PS)				\
-do {									\
-    erts_smp_atomic_set(&(PS)->woken, (erts_aint_t) 0);			\
-    ERTS_THR_MEMORY_BARRIER;						\
-} while (0)
-#define ERTS_POLLSET_IS_POLLER_WOKEN(PS)				\
-  ((int) erts_smp_atomic_read(&(PS)->woken))
+  ((int) erts_atomic32_read(&(PS)->polled))
 
 #else
 
@@ -152,69 +138,21 @@ do {									\
 #define ERTS_POLLSET_UNSET_POLLED(PS)
 #define ERTS_POLLSET_IS_POLLED(PS) 0
 
-#if ERTS_POLL_ASYNC_INTERRUPT_SUPPORT
-
-/*
- * Ideally, the ERTS_POLLSET_SET_POLLER_WOKEN_CHK(PS) operation would
- * be atomic. This operation isn't, but we will do okay anyway. The
- * "woken check" is only an optimization. The only requirement we have:
- * If (PS)->woken is set to a value != 0 when interrupting, we have to
- * write on the the wakeup pipe at least once. Multiple writes are okay.
- */
-#define ERTS_POLLSET_SET_POLLER_WOKEN_CHK(PS) ((PS)->woken++)
-#define ERTS_POLLSET_SET_POLLER_WOKEN(PS) ((PS)->woken = 1, (void) 0)
-#define ERTS_POLLSET_UNSET_POLLER_WOKEN(PS) ((PS)->woken = 0, (void) 0)
-#define ERTS_POLLSET_IS_POLLER_WOKEN(PS) ((PS)->woken)
-
-#else
-
-#define ERTS_POLLSET_SET_POLLER_WOKEN_CHK(PS) 1
-#define ERTS_POLLSET_SET_POLLER_WOKEN(PS)
-#define ERTS_POLLSET_UNSET_POLLER_WOKEN(PS)
-#define ERTS_POLLSET_IS_POLLER_WOKEN(PS) 1
-
-#endif
-
 #endif
 
 #if ERTS_POLL_USE_UPDATE_REQUESTS_QUEUE
 #define ERTS_POLLSET_SET_HAVE_UPDATE_REQUESTS(PS) \
-  erts_smp_atomic_set(&(PS)->have_update_requests, (erts_aint_t) 1)
+  erts_smp_atomic32_set(&(PS)->have_update_requests, (erts_aint32_t) 1)
 #define ERTS_POLLSET_UNSET_HAVE_UPDATE_REQUESTS(PS) \
-  erts_smp_atomic_set(&(PS)->have_update_requests, (erts_aint_t) 0)
+  erts_smp_atomic32_set(&(PS)->have_update_requests, (erts_aint32_t) 0)
 #define ERTS_POLLSET_HAVE_UPDATE_REQUESTS(PS) \
-  ((int) erts_smp_atomic_read(&(PS)->have_update_requests))
+  ((int) erts_smp_atomic32_read(&(PS)->have_update_requests))
 #else
 #define ERTS_POLLSET_SET_HAVE_UPDATE_REQUESTS(PS)
 #define ERTS_POLLSET_UNSET_HAVE_UPDATE_REQUESTS(PS)
 #define ERTS_POLLSET_HAVE_UPDATE_REQUESTS(PS) 0
 #endif
 
-#if ERTS_POLL_ASYNC_INTERRUPT_SUPPORT && !defined(ERTS_SMP)
-
-#define ERTS_POLLSET_UNSET_INTERRUPTED_CHK(PS) unset_interrupted_chk((PS))
-#define ERTS_POLLSET_UNSET_INTERRUPTED(PS) ((PS)->interrupt = 0, (void) 0)
-#define ERTS_POLLSET_SET_INTERRUPTED(PS) ((PS)->interrupt = 1, (void) 0)
-#define ERTS_POLLSET_IS_INTERRUPTED(PS) ((PS)->interrupt)
-
-#else
-
-#define ERTS_POLLSET_UNSET_INTERRUPTED_CHK(PS) unset_interrupted_chk((PS))
-#define ERTS_POLLSET_UNSET_INTERRUPTED(PS)				\
-do {									\
-    erts_smp_atomic_set(&(PS)->interrupt, (erts_aint_t) 0);		\
-    ERTS_THR_MEMORY_BARRIER;						\
-} while (0)
-#define ERTS_POLLSET_SET_INTERRUPTED(PS) 				\
-do {									\
-      ERTS_THR_MEMORY_BARRIER;						\
-      erts_smp_atomic_set(&(PS)->interrupt, (erts_aint_t) 1);		\
-} while (0)
-#define ERTS_POLLSET_IS_INTERRUPTED(PS)					\
-  ((int) erts_smp_atomic_read(&(PS)->interrupt))
-
-#endif
-
 #if ERTS_POLL_USE_FALLBACK
 #  if ERTS_POLL_USE_POLL
 #    define ERTS_POLL_NEED_FALLBACK(PS) ((PS)->no_poll_fds > 1)
@@ -318,14 +256,12 @@ struct ErtsPollSet_ {
 #if ERTS_POLL_USE_UPDATE_REQUESTS_QUEUE
     ErtsPollSetUpdateRequestsBlock update_requests;
     ErtsPollSetUpdateRequestsBlock *curr_upd_req_block;
-    erts_smp_atomic_t have_update_requests;
+    erts_smp_atomic32_t have_update_requests;
 #endif
 #ifdef ERTS_SMP
-    erts_smp_atomic_t polled;
-    erts_smp_atomic_t woken;
+    erts_atomic32_t polled;
     erts_smp_mtx_t mtx;
 #elif ERTS_POLL_ASYNC_INTERRUPT_SUPPORT
-    volatile int woken;
 #endif
 #if ERTS_POLL_USE_WAKEUP_PIPE
     int wake_fds[2];
@@ -333,12 +269,12 @@ struct ErtsPollSet_ {
 #if ERTS_POLL_USE_FALLBACK
     int fallback_used;
 #endif
-#if ERTS_POLL_ASYNC_INTERRUPT_SUPPORT && !defined(ERTS_SMP)
-    volatile int interrupt;
-#else
-    erts_smp_atomic_t interrupt;
+#ifdef ERTS_SMP
+    erts_atomic32_t wakeup_state;
+#elif ERTS_POLL_ASYNC_INTERRUPT_SUPPORT
+    volatile int wakeup_state;
 #endif
-    erts_smp_atomic_t timeout;
+    erts_smp_atomic32_t timeout;
 #ifdef ERTS_POLL_COUNT_AVOIDED_WAKEUPS
     erts_smp_atomic_t no_avoided_wakeups;
     erts_smp_atomic_t no_avoided_interrupts;
@@ -346,34 +282,6 @@ struct ErtsPollSet_ {
 #endif
 };
 
-static ERTS_INLINE int
-unset_interrupted_chk(ErtsPollSet ps)
-{
-    int res;
-#if ERTS_POLL_ASYNC_INTERRUPT_SUPPORT && !defined(ERTS_SMP)
-    /* This operation isn't atomic, but we have no need at all for an
-       atomic operation here... */
-    res = ps->interrupt;
-    ps->interrupt = 0;
-#else
-    res = (int) erts_smp_atomic_xchg(&ps->interrupt, (erts_aint_t) 0);
-    ERTS_THR_MEMORY_BARRIER;
-#endif
-    return res;
-
-}
-
-#ifdef ERTS_SMP
-
-static ERTS_INLINE int
-set_poller_woken_chk(ErtsPollSet ps)
-{
-    ERTS_THR_MEMORY_BARRIER;
-    return (int) erts_smp_atomic_xchg(&ps->woken, (erts_aint_t) 1);
-}
-
-#endif
-
 void erts_silence_warn_unused_result(long unused);
 static void fatal_error(char *format, ...);
 static void fatal_error_async_signal_safe(char *error_str);
@@ -430,6 +338,63 @@ static void check_poll_status(ErtsPollSet ps);
 static void print_misc_debug_info(void);
 #endif
 
+#define ERTS_POLL_NOT_WOKEN	0
+#define ERTS_POLL_WOKEN		-1
+#define ERTS_POLL_WOKEN_INTR	1
+
+static ERTS_INLINE void
+reset_wakeup_state(ErtsPollSet ps)
+{
+#ifdef ERTS_SMP
+    erts_atomic32_set(&ps->wakeup_state, ERTS_POLL_NOT_WOKEN);
+#elif ERTS_POLL_ASYNC_INTERRUPT_SUPPORT
+    ps->wakeup_state = 0;
+#endif
+}
+
+static ERTS_INLINE int
+is_woken(ErtsPollSet ps)
+{
+#ifdef ERTS_SMP
+    return erts_atomic32_read_acqb(&ps->wakeup_state) != ERTS_POLL_NOT_WOKEN;
+#elif ERTS_POLL_ASYNC_INTERRUPT_SUPPORT
+    return ps->wakeup_state != ERTS_POLL_NOT_WOKEN;
+#else
+    return 0;
+#endif
+}
+
+static ERTS_INLINE int
+is_interrupted_reset(ErtsPollSet ps)
+{
+#ifdef ERTS_SMP
+    return (erts_atomic32_xchg(&ps->wakeup_state, ERTS_POLL_NOT_WOKEN)
+	    == ERTS_POLL_WOKEN_INTR);
+#elif ERTS_POLL_ASYNC_INTERRUPT_SUPPORT
+    int res = ps->wakeup_state == ERTS_POLL_WOKEN_INTR;
+    ps->wakeup_state = ERTS_POLL_NOT_WOKEN;
+    return res;
+#else
+    return 0;
+#endif
+}
+
+static ERTS_INLINE void
+woke_up(ErtsPollSet ps)
+{
+#ifdef ERTS_SMP
+    erts_aint32_t wakeup_state = erts_atomic32_read(&ps->wakeup_state);
+    if (wakeup_state == ERTS_POLL_NOT_WOKEN)
+	(void) erts_atomic32_cmpxchg(&ps->wakeup_state,
+				     ERTS_POLL_WOKEN,
+				     ERTS_POLL_NOT_WOKEN);
+    ASSERT(erts_atomic32_read(&ps->wakeup_state) != ERTS_POLL_NOT_WOKEN);
+#elif ERTS_POLL_ASYNC_INTERRUPT_SUPPORT
+    if (ps->wakeup_state == ERTS_POLL_NOT_WOKEN)
+	ps->wakeup_state = ERTS_POLL_WOKEN;
+#endif
+}
+
 /*
  * --- Wakeup pipe -----------------------------------------------------------
  */
@@ -437,14 +402,34 @@ static void print_misc_debug_info(void);
 #if ERTS_POLL_USE_WAKEUP_PIPE
 
 static ERTS_INLINE void
-wake_poller(ErtsPollSet ps)
+wake_poller(ErtsPollSet ps, int interrupted)
 {
+    int wake;
+#ifdef ERTS_SMP
+    erts_aint32_t wakeup_state;
+    if (!interrupted)
+	wakeup_state = erts_atomic32_cmpxchg_relb(&ps->wakeup_state,
+						  ERTS_POLL_WOKEN,
+						  ERTS_POLL_NOT_WOKEN);
+    else {
+	/*
+	 * We might unnecessarily write to the pipe, however,
+	 * that isn't problematic.
+	 */
+	wakeup_state = erts_atomic32_read(&ps->wakeup_state);
+	erts_atomic32_set_relb(&ps->wakeup_state, ERTS_POLL_WOKEN_INTR);
+    }
+    wake = wakeup_state == ERTS_POLL_NOT_WOKEN;
+#elif ERTS_POLL_ASYNC_INTERRUPT_SUPPORT
+    wake = ps->wakeup_state == ERTS_POLL_NOT_WOKEN;
+    ps->wakeup_state = interrupted ? ERTS_POLL_WOKEN_INTR : ERTS_POLL_NOT_WOKEN;
+#endif
     /*
      * NOTE: This function might be called from signal handlers in the
      *       non-smp case; therefore, it has to be async-signal safe in
      *       the non-smp case.
      */
-    if (!ERTS_POLLSET_SET_POLLER_WOKEN_CHK(ps)) {
+    if (wake) {
 	ssize_t res;
 	if (ps->wake_fds[1] < 0)
 	    return; /* Not initialized yet */
@@ -1387,9 +1372,7 @@ handle_update_requests(ErtsPollSet ps)
 #endif /* ERTS_POLL_USE_UPDATE_REQUESTS_QUEUE */
 
 static ERTS_INLINE ErtsPollEvents
-poll_control(ErtsPollSet ps, int fd, ErtsPollEvents events, int on,
-	     int *have_set_have_update_requests,
-	     int *do_wake)
+poll_control(ErtsPollSet ps, int fd, ErtsPollEvents events, int on, int *do_wake)
 {
     ErtsPollEvents new_events;
 
@@ -1493,7 +1476,6 @@ ERTS_POLL_EXPORT(erts_poll_controlv)(ErtsPollSet ps,
 				     int len)
 {
     int i;
-    int hshur = 0;
     int do_wake;
     int final_do_wake = 0;
 
@@ -1505,17 +1487,17 @@ ERTS_POLL_EXPORT(erts_poll_controlv)(ErtsPollSet ps,
 				      pcev[i].fd,
 				      pcev[i].events,
 				      pcev[i].on,
-				      &hshur,
 				      &do_wake);
 	final_do_wake |= do_wake;
     }
 
+    ERTS_POLLSET_UNLOCK(ps);
+
 #ifdef ERTS_SMP
     if (final_do_wake)
-	wake_poller(ps);
+	wake_poller(ps, 0);
 #endif /* ERTS_SMP */
 
-    ERTS_POLLSET_UNLOCK(ps);
 }
 
 ErtsPollEvents
@@ -1526,20 +1508,20 @@ ERTS_POLL_EXPORT(erts_poll_control)(ErtsPollSet ps,
 				    int* do_wake) /* In: Wake up polling thread */
 				                  /* Out: Poller is woken */
 {
-    int hshur = 0;
     ErtsPollEvents res;
 
     ERTS_POLLSET_LOCK(ps);
 
-    res = poll_control(ps, fd, events, on, &hshur, do_wake);
+    res = poll_control(ps, fd, events, on, do_wake);
+
+    ERTS_POLLSET_UNLOCK(ps);
 
 #ifdef ERTS_SMP
     if (*do_wake) {
-	wake_poller(ps);
+	wake_poller(ps, 0);
     }
 #endif /* ERTS_SMP */
 
-    ERTS_POLLSET_UNLOCK(ps);
     return res;
 }
 
@@ -1918,9 +1900,11 @@ check_fd_events(ErtsPollSet ps, SysTimeval *tv, int max_res, int *ps_locked)
 	return 0;
     }
     else {
-	erts_aint_t timeout = tv->tv_sec*1000 + tv->tv_usec/1000;
+	long timeout = tv->tv_sec*1000 + tv->tv_usec/1000;
+	if (timeout > ERTS_AINT32_T_MAX)
+	    timeout = ERTS_AINT32_T_MAX;
 	ASSERT(timeout >= 0);
-	erts_smp_atomic_set(&ps->timeout, timeout);
+	erts_smp_atomic32_set_relb(&ps->timeout, (erts_aint32_t) timeout);
 #if ERTS_POLL_USE_FALLBACK
 	if (!(ps->fallback_used = ERTS_POLL_NEED_FALLBACK(ps))) {
 
@@ -2042,15 +2026,14 @@ ERTS_POLL_EXPORT(erts_poll_wait)(ErtsPollSet ps,
 		 (int) tv->tv_sec*1000 + tv->tv_usec/1000);
 #endif
 
-    ERTS_POLLSET_UNSET_POLLER_WOKEN(ps);
     if (ERTS_POLLSET_SET_POLLED_CHK(ps)) {
 	res = EINVAL; /* Another thread is in erts_poll_wait()
 			 on this pollset... */
 	goto done;
     }
 
-    if (ERTS_POLLSET_IS_INTERRUPTED(ps)) {
-	/* Interrupt use zero timeout */
+    if (is_woken(ps)) {
+	/* Use zero timeout */
 	itv.tv_sec = 0;
 	itv.tv_usec = 0;
 	tvp = &itv;
@@ -2067,7 +2050,7 @@ ERTS_POLL_EXPORT(erts_poll_wait)(ErtsPollSet ps,
     ps_locked = 0;
     res = check_fd_events(ps, tvp, no_fds, &ps_locked);
 
-    ERTS_POLLSET_SET_POLLER_WOKEN(ps);
+    woke_up(ps);
 
     if (res == 0) {
 	res = ETIMEDOUT;
@@ -2099,9 +2082,7 @@ ERTS_POLL_EXPORT(erts_poll_wait)(ErtsPollSet ps,
 	check_poll_result(pr, no_fds);
 #endif
 
-	res = (no_fds == 0
-	       ? (ERTS_POLLSET_UNSET_INTERRUPTED_CHK(ps) ? EINTR : EAGAIN)
-	       : 0);
+	res = (no_fds == 0 ? (is_interrupted_reset(ps) ? EINTR : EAGAIN) : 0);
 	*len = no_fds;
     }
 
@@ -2112,7 +2093,7 @@ ERTS_POLL_EXPORT(erts_poll_wait)(ErtsPollSet ps,
 #endif
 
  done:
-    erts_smp_atomic_set(&ps->timeout, ERTS_AINT_T_MAX);
+    erts_smp_atomic32_set_relb(&ps->timeout, ERTS_AINT32_T_MAX);
 #ifdef ERTS_POLL_DEBUG_PRINT
     erts_printf("Leaving %s = erts_poll_wait()\n",
 		 res == 0 ? "0" : erl_errno_id(res));
@@ -2128,20 +2109,17 @@ ERTS_POLL_EXPORT(erts_poll_wait)(ErtsPollSet ps,
 void
 ERTS_POLL_EXPORT(erts_poll_interrupt)(ErtsPollSet ps, int set)
 {
+#if ERTS_POLL_ASYNC_INTERRUPT_SUPPORT || defined(ERTS_SMP)
     /*
      * NOTE: This function might be called from signal handlers in the
      *       non-smp case; therefore, it has to be async-signal safe in
      *       the non-smp case.
      */
-    if (set) {
-	ERTS_POLLSET_SET_INTERRUPTED(ps);
-#if ERTS_POLL_ASYNC_INTERRUPT_SUPPORT || defined(ERTS_SMP)
-	wake_poller(ps);
+    if (!set)
+	reset_wakeup_state(ps);
+    else
+	wake_poller(ps, 1);
 #endif
-    }
-    else {
-	ERTS_POLLSET_UNSET_INTERRUPTED(ps);
-    }
 }
 
 /*
@@ -2154,13 +2132,12 @@ ERTS_POLL_EXPORT(erts_poll_interrupt_timed)(ErtsPollSet ps,
 					    int set,
 					    long msec)
 {
-    if (set) {
-	if (erts_smp_atomic_read(&ps->timeout) > (erts_aint_t) msec) {
-	    ERTS_POLLSET_SET_INTERRUPTED(ps);
 #if ERTS_POLL_ASYNC_INTERRUPT_SUPPORT || defined(ERTS_SMP)
-	    wake_poller(ps);
-#endif
-	}
+    if (!set)
+	reset_wakeup_state(ps);
+    else {
+	if (erts_smp_atomic32_read_acqb(&ps->timeout) > (erts_aint32_t) msec)
+	    wake_poller(ps, 1);
 #ifdef ERTS_POLL_COUNT_AVOIDED_WAKEUPS
 	else {
 	    if (ERTS_POLLSET_IS_POLLED(ps))
@@ -2170,9 +2147,7 @@ ERTS_POLL_EXPORT(erts_poll_interrupt_timed)(ErtsPollSet ps,
 	erts_smp_atomic_inc(&ps->no_interrupt_timed);
 #endif
     }
-    else {
-	ERTS_POLLSET_UNSET_INTERRUPTED(ps);
-    }
+#endif
 }
 
 int
@@ -2283,14 +2258,16 @@ ERTS_POLL_EXPORT(erts_poll_create_pollset)(void)
     ps->update_requests.next = NULL;
     ps->update_requests.len = 0;
     ps->curr_upd_req_block = &ps->update_requests;
-    erts_smp_atomic_init(&ps->have_update_requests, 0);
+    erts_smp_atomic32_init(&ps->have_update_requests, 0);
 #endif
 #ifdef ERTS_SMP
-    erts_smp_atomic_init(&ps->polled, 0);
-    erts_smp_atomic_init(&ps->woken, 0);
+    erts_atomic32_init(&ps->polled, 0);
     erts_smp_mtx_init(&ps->mtx, "pollset");
+#endif
+#ifdef ERTS_SMP
+    erts_atomic32_init(&ps->wakeup_state, (erts_aint32_t) 0);
 #elif ERTS_POLL_ASYNC_INTERRUPT_SUPPORT
-    ps->woken = 0;
+    ps->wakeup_state = 0;
 #endif
 #if ERTS_POLL_USE_WAKEUP_PIPE
     create_wakeup_pipe(ps);
@@ -2312,12 +2289,7 @@ ERTS_POLL_EXPORT(erts_poll_create_pollset)(void)
 	ps->internal_fd_limit = kp_fd + 1;
     ps->kp_fd = kp_fd;
 #endif
-#if ERTS_POLL_ASYNC_INTERRUPT_SUPPORT && !defined(ERTS_SMP)
-    ps->interrupt = 0;
-#else
-    erts_smp_atomic_init(&ps->interrupt, 0);
-#endif
-    erts_smp_atomic_init(&ps->timeout, ERTS_AINT_T_MAX);
+    erts_smp_atomic32_init(&ps->timeout, ERTS_AINT32_T_MAX);
 #ifdef ERTS_POLL_COUNT_AVOIDED_WAKEUPS
     erts_smp_atomic_init(&ps->no_avoided_wakeups, 0);
     erts_smp_atomic_init(&ps->no_avoided_interrupts, 0);
diff --git a/erts/emulator/sys/unix/erl_unix_sys.h b/erts/emulator/sys/unix/erl_unix_sys.h
index 2d5ef882f6..824678a0bb 100644
--- a/erts/emulator/sys/unix/erl_unix_sys.h
+++ b/erts/emulator/sys/unix/erl_unix_sys.h
@@ -329,11 +329,4 @@ extern int exit_async(void);
 
 #define ERTS_EXIT_AFTER_DUMP _exit
 
-#ifdef ERTS_TIMER_THREAD
-struct erts_iwait; /* opaque for clients */
-extern struct erts_iwait *erts_iwait_init(void);
-extern void erts_iwait_wait(struct erts_iwait *iwait, struct timeval *delay);
-extern void erts_iwait_interrupt(struct erts_iwait *iwait);
-#endif /* ERTS_TIMER_THREAD */
-
 #endif /* #ifndef _ERL_UNIX_SYS_H */
diff --git a/erts/emulator/sys/unix/sys.c b/erts/emulator/sys/unix/sys.c
index d021baa6bf..bafbbb0f6c 100644
--- a/erts/emulator/sys/unix/sys.c
+++ b/erts/emulator/sys/unix/sys.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1996-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1996-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -53,6 +53,11 @@
 #define WANT_NONBLOCKING    /* must define this to pull in defs from sys.h */
 #include "sys.h"
 
+#if defined(__APPLE__) && defined(__MACH__) && !defined(__DARWIN__)
+#define __DARWIN__ 1
+#endif
+
+
 #ifdef USE_THREADS
 #include "erl_threads.h"
 #endif
@@ -160,14 +165,14 @@ static int debug_log = 0;
 #endif
 
 #ifdef ERTS_SMP
-erts_smp_atomic_t erts_got_sigusr1;
+erts_smp_atomic32_t erts_got_sigusr1;
 #define ERTS_SET_GOT_SIGUSR1 \
-  erts_smp_atomic_set(&erts_got_sigusr1, 1)
+  erts_smp_atomic32_set(&erts_got_sigusr1, 1)
 #define ERTS_UNSET_GOT_SIGUSR1 \
-  erts_smp_atomic_set(&erts_got_sigusr1, 0)
-static erts_smp_atomic_t have_prepared_crash_dump;
+  erts_smp_atomic32_set(&erts_got_sigusr1, 0)
+static erts_smp_atomic32_t have_prepared_crash_dump;
 #define ERTS_PREPARED_CRASH_DUMP \
-  ((int) erts_smp_atomic_xchg(&have_prepared_crash_dump, 1))
+  ((int) erts_smp_atomic32_xchg(&have_prepared_crash_dump, 1))
 #else
 volatile int erts_got_sigusr1;
 #define ERTS_SET_GOT_SIGUSR1 (erts_got_sigusr1 = 1)
@@ -235,11 +240,11 @@ static int max_files = -1;
  * a few variables used by the break handler 
  */
 #ifdef ERTS_SMP
-erts_smp_atomic_t erts_break_requested;
+erts_smp_atomic32_t erts_break_requested;
 #define ERTS_SET_BREAK_REQUESTED \
-  erts_smp_atomic_set(&erts_break_requested, (erts_aint_t) 1)
+  erts_smp_atomic32_set(&erts_break_requested, (erts_aint32_t) 1)
 #define ERTS_UNSET_BREAK_REQUESTED \
-  erts_smp_atomic_set(&erts_break_requested, (erts_aint_t) 0)
+  erts_smp_atomic32_set(&erts_break_requested, (erts_aint32_t) 0)
 #else
 volatile int erts_break_requested = 0;
 #define ERTS_SET_BREAK_REQUESTED (erts_break_requested = 1)
@@ -504,9 +509,9 @@ erts_sys_pre_init(void)
 #endif
     }
 #ifdef ERTS_SMP
-    erts_smp_atomic_init(&erts_break_requested, 0);
-    erts_smp_atomic_init(&erts_got_sigusr1, 0);
-    erts_smp_atomic_init(&have_prepared_crash_dump, 0);
+    erts_smp_atomic32_init(&erts_break_requested, 0);
+    erts_smp_atomic32_init(&erts_got_sigusr1, 0);
+    erts_smp_atomic32_init(&have_prepared_crash_dump, 0);
 #else
     erts_break_requested = 0;
     erts_got_sigusr1 = 0;
@@ -2989,11 +2994,27 @@ init_smp_sig_notify(void)
 			NULL,
 			&thr_opts);
 }
+#ifdef __DARWIN__
+
+int erts_darwin_main_thread_pipe[2];
+int erts_darwin_main_thread_result_pipe[2];
 
+static void initialize_darwin_main_thread_pipes(void) 
+{
+    if (pipe(erts_darwin_main_thread_pipe) < 0 || 
+	pipe(erts_darwin_main_thread_result_pipe) < 0) {
+	erl_exit(1,"Fatal error initializing Darwin main thread stealing");
+    }
+}
+
+#endif
 void
 erts_sys_main_thread(void)
 {
     erts_thread_disable_fpe();
+#ifdef __DARWIN__
+    initialize_darwin_main_thread_pipes();
+#endif
     /* Become signal receiver thread... */
 #ifdef ERTS_ENABLE_LOCK_CHECK
     erts_lc_set_thread_name("signal_receiver");
@@ -3002,6 +3023,27 @@ erts_sys_main_thread(void)
     smp_sig_notify(0); /* Notify initialized */
     while (1) {
 	/* Wait for a signal to arrive... */
+#ifdef __DARWIN__
+	/*
+	 * The wx driver needs to be able to steal the main thread for Cocoa to
+	 * work properly.
+	 */
+	fd_set readfds;
+	int res;
+
+	FD_ZERO(&readfds);
+	FD_SET(erts_darwin_main_thread_pipe[0], &readfds);
+	res = select(erts_darwin_main_thread_pipe[0] + 1, &readfds, NULL, NULL, NULL);
+	if (res > 0 && FD_ISSET(erts_darwin_main_thread_pipe[0],&readfds)) {
+	    void* (*func)(void*);
+	    void* arg;
+	    void *resp;
+	    read(erts_darwin_main_thread_pipe[0],&func,sizeof(void* (*)(void*)));
+	    read(erts_darwin_main_thread_pipe[0],&arg, sizeof(void*));
+	    resp = (*func)(arg);
+	    write(erts_darwin_main_thread_result_pipe[1],&resp,sizeof(void *));
+	}
+#else
 #ifdef DEBUG
 	int res =
 #else
@@ -3010,6 +3052,7 @@ erts_sys_main_thread(void)
 	    select(0, NULL, NULL, NULL, NULL);
 	ASSERT(res < 0);
 	ASSERT(errno == EINTR);
+#endif
     }
 }
 
@@ -3109,226 +3152,3 @@ erl_sys_args(int* argc, char** argv)
     }
     *argc = j;
 }
-
-#ifdef ERTS_TIMER_THREAD
-
-/*
- * Interruptible-wait facility: low-level synchronisation state
- * and methods that are implementation dependent.
- *
- * Constraint: Every implementation must define 'struct erts_iwait'
- * with a field 'erts_smp_atomic_t state;'.
- */
-
-/* values for struct erts_iwait's state field */
-#define IWAIT_WAITING	0
-#define IWAIT_AWAKE	1
-#define IWAIT_INTERRUPT	2
-
-#if 0	/* XXX: needs feature test in erts/configure.in */
-
-/*
- * This is an implementation of the interruptible wait facility on
- * top of Linux-specific futexes.
- */
-#include <asm/unistd.h>
-#define FUTEX_WAIT		0
-#define FUTEX_WAKE		1
-static int sys_futex(void *futex, int op, int val, const struct timespec *timeout)
-{
-    return syscall(__NR_futex, futex, op, val, timeout);
-}
-
-struct erts_iwait {
-    erts_smp_atomic_t state; /* &state.counter is our futex */
-};
-
-static void iwait_lowlevel_init(struct erts_iwait *iwait) { /* empty */ }
-
-static void iwait_lowlevel_wait(struct erts_iwait *iwait, struct timeval *delay)
-{
-    struct timespec timeout;
-    int res;
-
-    timeout.tv_sec = delay->tv_sec;
-    timeout.tv_nsec = delay->tv_usec * 1000;
-    res = sys_futex((void*)&iwait->state.counter, FUTEX_WAIT, IWAIT_WAITING, &timeout);
-    if (res < 0 && errno != ETIMEDOUT && errno != EWOULDBLOCK && errno != EINTR)
-	perror("FUTEX_WAIT");
-}
-
-static void iwait_lowlevel_interrupt(struct erts_iwait *iwait)
-{
-    int res = sys_futex((void*)&iwait->state.counter, FUTEX_WAKE, 1, NULL);
-    if (res < 0)
-	perror("FUTEX_WAKE");
-}
-
-#else	/* using poll() or select() */
-
-/*
- * This is an implementation of the interruptible wait facility on
- * top of pipe(), poll() or select(), read(), and write().
- */
-struct erts_iwait {
-    erts_smp_atomic_t state;
-    int read_fd;	/* wait polls and reads this fd */
-    int write_fd;	/* interrupt writes this fd */
-};
-
-static void iwait_lowlevel_init(struct erts_iwait *iwait)
-{
-    int fds[2];
-
-    if (pipe(fds) < 0) {
-	perror("pipe()");
-	exit(1);
-    }
-    iwait->read_fd = fds[0];
-    iwait->write_fd = fds[1];
-}
-
-#if defined(ERTS_USE_POLL)
-
-#include <sys/poll.h>
-#define PERROR_POLL "poll()"
-
-static int iwait_lowlevel_poll(int read_fd, struct timeval *delay)
-{
-    struct pollfd pollfd;
-    int timeout;
-
-    pollfd.fd = read_fd;
-    pollfd.events = POLLIN;
-    pollfd.revents = 0;
-    timeout = delay->tv_sec * 1000 + delay->tv_usec / 1000;
-    return poll(&pollfd, 1, timeout);
-}
-
-#else	/* !ERTS_USE_POLL */
-
-#include <sys/select.h>
-#define PERROR_POLL "select()"
-
-static int iwait_lowlevel_poll(int read_fd, struct timeval *delay)
-{
-    fd_set readfds;
-
-    FD_ZERO(&readfds);
-    FD_SET(read_fd, &readfds);
-    return select(read_fd + 1, &readfds, NULL, NULL, delay);
-}
-
-#endif	/* !ERTS_USE_POLL */
-
-static void iwait_lowlevel_wait(struct erts_iwait *iwait, struct timeval *delay)
-{
-    int res;
-    char buf[64];
-
-    res = iwait_lowlevel_poll(iwait->read_fd, delay);
-    if (res > 0)
-	(void)read(iwait->read_fd, buf, sizeof buf);
-    else if (res < 0 && errno != EINTR)
-	perror(PERROR_POLL);
-}
-
-static void iwait_lowlevel_interrupt(struct erts_iwait *iwait)
-{
-    int res = write(iwait->write_fd, "!", 1);
-    if (res < 0)
-	perror("write()");
-}
-
-#endif	/* using poll() or select() */
-
-#if 0	/* not using poll() or select() */
-/*
- * This is an implementation of the interruptible wait facility on
- * top of pthread_cond_timedwait(). This has two problems:
- * 1. pthread_cond_timedwait() requires an absolute time point,
- *    so the relative delay must be converted to absolute time.
- *    Worse, this breaks if the machine's time is adjusted while
- *    we're preparing to wait.
- * 2. Each cond operation requires additional mutex lock/unlock operations.
- *
- * Problem 2 is probably not too bad on Linux (they'll just become
- * relatively cheap futex operations), but problem 1 is the real killer.
- * Only use this implementation if no better alternatives are available!
- */
-struct erts_iwait {
-    erts_smp_atomic_t state;
-    pthread_cond_t cond;
-    pthread_mutex_t mutex;
-};
-
-static void iwait_lowlevel_init(struct erts_iwait *iwait)
-{
-    iwait->cond = (pthread_cond_t) PTHREAD_COND_INITIALIZER;
-    iwait->mutex = (pthread_mutex_t) PTHREAD_MUTEX_INITIALIZER;
-}
-
-static void iwait_lowlevel_wait(struct erts_iwait *iwait, struct timeval *delay)
-{
-    struct timeval tmp;
-    struct timespec timeout;
-
-    /* Due to pthread_cond_timedwait()'s use of absolute
-       time, this must be the real gettimeofday(), _not_
-       the "smoothed" one beam/erl_time_sup.c implements. */
-    gettimeofday(&tmp, NULL);
-
-    tmp.tv_sec += delay->tv_sec;
-    tmp.tv_usec += delay->tv_usec;
-    if (tmp.tv_usec >= 1000*1000) {
-	tmp.tv_usec -= 1000*1000;
-	tmp.tv_sec += 1;
-    }
-    timeout.tv_sec = tmp.tv_sec;
-    timeout.tv_nsec = tmp.tv_usec * 1000;
-    pthread_mutex_lock(&iwait->mutex);
-    pthread_cond_timedwait(&iwait->cond, &iwait->mutex, &timeout);
-    pthread_mutex_unlock(&iwait->mutex);
-}
-
-static void iwait_lowlevel_interrupt(struct erts_iwait *iwait)
-{
-    pthread_mutex_lock(&iwait->mutex);
-    pthread_cond_signal(&iwait->cond);
-    pthread_mutex_unlock(&iwait->mutex);
-}
-
-#endif /* not using POLL */
-
-/*
- * Interruptible-wait facility. This is just a wrapper around the
- * low-level synchronisation code, where we maintain our logical
- * state in order to suppress some state transitions.
- */
-
-struct erts_iwait *erts_iwait_init(void)
-{
-    struct erts_iwait *iwait = malloc(sizeof *iwait);
-    if (!iwait) {
-	perror("malloc");
-	exit(1);
-    }
-    iwait_lowlevel_init(iwait);
-    erts_smp_atomic_init(&iwait->state, IWAIT_AWAKE);
-    return iwait;
-}
-
-void erts_iwait_wait(struct erts_iwait *iwait, struct timeval *delay)
-{
-    if (erts_smp_atomic_xchg(&iwait->state, IWAIT_WAITING) != IWAIT_INTERRUPT)
-	iwait_lowlevel_wait(iwait, delay);
-    erts_smp_atomic_set(&iwait->state, IWAIT_AWAKE);
-}
-
-void erts_iwait_interrupt(struct erts_iwait *iwait)
-{
-    if (erts_smp_atomic_xchg(&iwait->state, IWAIT_INTERRUPT) == IWAIT_WAITING)
-	iwait_lowlevel_interrupt(iwait);
-}
-
-#endif /* ERTS_TIMER_THREAD */
diff --git a/erts/emulator/sys/unix/sys_float.c b/erts/emulator/sys/unix/sys_float.c
index 6e9376b0f3..8ec7b31ce0 100644
--- a/erts/emulator/sys/unix/sys_float.c
+++ b/erts/emulator/sys/unix/sys_float.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2001-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2001-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -36,11 +36,6 @@ erts_sys_init_float(void)
 # endif
 }
 
-static ERTS_INLINE void set_current_fp_exception(unsigned long pc)
-{
-    /* nothing to do */
-}
-
 #else  /* !NO_FPE_SIGNALS */
 
 #ifdef ERTS_SMP
diff --git a/erts/emulator/sys/vxworks/sys.c b/erts/emulator/sys/vxworks/sys.c
index 411b4b37cf..c6e7b65f32 100644
--- a/erts/emulator/sys/vxworks/sys.c
+++ b/erts/emulator/sys/vxworks/sys.c
@@ -85,7 +85,7 @@ EXTERN_FUNCTION(void, erl_exit, (int n, char*, _DOTS_));
 EXTERN_FUNCTION(void, erl_error, (char*, va_list));
 EXTERN_FUNCTION(int, driver_interrupt, (int, int));
 EXTERN_FUNCTION(void, increment_time, (int));
-EXTERN_FUNCTION(int, next_time, (_VOID_));
+EXTERN_FUNCTION(int, erts_next_time, (_VOID_));
 EXTERN_FUNCTION(void, set_reclaim_free_function, (FreeFunction));
 EXTERN_FUNCTION(int, erl_mem_info_get, (MEM_PART_STATS *));
 EXTERN_FUNCTION(void, erl_crash_dump, (char* file, int line, char* fmt, ...));
diff --git a/erts/emulator/sys/win32/erl_poll.c b/erts/emulator/sys/win32/erl_poll.c
index d84ae2ede2..1f2877b682 100644
--- a/erts/emulator/sys/win32/erl_poll.c
+++ b/erts/emulator/sys/win32/erl_poll.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 2007-2010. All Rights Reserved.
+ * Copyright Ericsson AB 2007-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -274,7 +274,6 @@ struct ErtsPollSet_ {
     Waiter** waiter;
     int allocated_waiters;  /* Size ow waiter array */ 
     int num_waiters;	    /* Number of waiter threads. */
-    erts_atomic_t sys_io_ready; /* Tells us there is I/O ready (already). */
     int restore_events;        /* Tells us to restore waiters events 
 				  next time around */
     HANDLE event_io_ready;     /* To be used when waiting for io */
@@ -282,12 +281,11 @@ struct ErtsPollSet_ {
     volatile int standby_wait_counter; /* Number of threads to wait for */
     CRITICAL_SECTION standby_crit;     /* CS to guard the counter */
     HANDLE standby_wait_event;         /* Event signalled when counte == 0 */
+    erts_atomic32_t wakeup_state;
 #ifdef ERTS_SMP
-    erts_smp_atomic_t woken;
     erts_smp_mtx_t mtx;
-    erts_smp_atomic_t interrupt;
 #endif
-    erts_smp_atomic_t timeout;
+    erts_smp_atomic32_t timeout;
 };
 
 #ifdef ERTS_SMP
@@ -296,126 +294,24 @@ struct ErtsPollSet_ {
   erts_smp_mtx_lock(&(PS)->mtx)
 #define ERTS_POLLSET_UNLOCK(PS) \
   erts_smp_mtx_unlock(&(PS)->mtx)
-#define ERTS_POLLSET_SET_POLLED_CHK(PS) \
-  ((int) erts_smp_atomic_xchg(&(PS)->polled, (erts_aint_t) 1))
-#define ERTS_POLLSET_SET_POLLED(PS) \
-  erts_smp_atomic_set(&(PS)->polled, (erts_aint_t) 1)
-#define ERTS_POLLSET_UNSET_POLLED(PS) \
-  erts_smp_atomic_set(&(PS)->polled, (erts_aint_t) 0)
-#define ERTS_POLLSET_IS_POLLED(PS) \
-  ((int) erts_smp_atomic_read(&(PS)->polled))
-
-#define ERTS_POLLSET_SET_POLLER_WOKEN_CHK(PS) set_poller_woken_chk((PS))
-#define ERTS_POLLSET_SET_POLLER_WOKEN(PS) 				\
-do {									\
-      ERTS_THR_MEMORY_BARRIER;						\
-      erts_smp_atomic_set(&(PS)->woken, (erts_aint_t) 1);			\
-} while (0)
-#define ERTS_POLLSET_UNSET_POLLER_WOKEN(PS)				\
-do {									\
-    erts_smp_atomic_set(&(PS)->woken, (erts_aint_t) 0);			\
-    ERTS_THR_MEMORY_BARRIER;						\
-} while (0)
-#define ERTS_POLLSET_IS_POLLER_WOKEN(PS)				\
-  ((int) erts_smp_atomic_read(&(PS)->woken))
-
-#define ERTS_POLLSET_UNSET_INTERRUPTED_CHK(PS) unset_interrupted_chk((PS))
-#define ERTS_POLLSET_UNSET_INTERRUPTED(PS)				\
-do {									\
-    erts_smp_atomic_set(&(PS)->interrupt, (erts_aint_t) 0);			\
-    ERTS_THR_MEMORY_BARRIER;						\
-} while (0)
-#define ERTS_POLLSET_SET_INTERRUPTED(PS) 				\
-do {									\
-      ERTS_THR_MEMORY_BARRIER;						\
-      erts_smp_atomic_set(&(PS)->interrupt, (erts_aint_t) 1);			\
-} while (0)
-#define ERTS_POLLSET_IS_INTERRUPTED(PS)					\
-  ((int) erts_smp_atomic_read(&(PS)->interrupt))
-
-static ERTS_INLINE int
-unset_interrupted_chk(ErtsPollSet ps)
-{
-    int res = (int) erts_smp_atomic_xchg(&ps->interrupt, (erts_aint_t) 0);
-    ERTS_THR_MEMORY_BARRIER;
-    return res;
-
-}
-
-static ERTS_INLINE int
-set_poller_woken_chk(ErtsPollSet ps)
-{
-    ERTS_THR_MEMORY_BARRIER;
-    return (int) erts_smp_atomic_xchg(&ps->woken, (erts_aint_t) 1);
-}
 
 #else
 
 #define ERTS_POLLSET_LOCK(PS)
 #define ERTS_POLLSET_UNLOCK(PS)
-#define ERTS_POLLSET_SET_POLLED_CHK(PS) 0
-#define ERTS_POLLSET_UNSET_POLLED(PS)
-#define ERTS_POLLSET_IS_POLLED(PS) 0
-#define ERTS_POLLSET_SET_POLLER_WOKEN_CHK(PS) 1
-#define ERTS_POLLSET_SET_POLLER_WOKEN(PS)
-#define ERTS_POLLSET_UNSET_POLLER_WOKEN(PS)
-#define ERTS_POLLSET_IS_POLLER_WOKEN(PS) 1
-
 
 #endif
 
 /*
- * While atomics are not yet implemented for windows in the common library...
- *
- * MSDN doc states that SMP machines and old compilers require
- * InterLockedExchange to properly read and write interlocked
- * variables, otherwise the processors might reschedule
- * the access and order of atomics access is destroyed... 
- * While they only mention it in white-papers, the problem
- * in VS2003 is due to the IA64 arch, so we can still count
- * on the CPU not rescheduling the access to volatile in X86 arch using 
- * even the slightly older compiler...
- *
- * So here's (hopefully) a subset of the generally working atomic 
- * variable access...
- */
-
-#if defined(__GNUC__)
-#  if defined(__i386__) || defined(__x86_64__)
-#    define VOLATILE_IN_SEQUENCE 1
-#  else
-#    define VOLATILE_IN_SEQUENCE 0
-#  endif 
-#elif defined(_MSC_VER)
-#  if _MSC_VER < 1300
-#    define VOLATILE_IN_SEQUENCE 0 /* Dont trust really old compilers */
-#  else
-#    if defined(_M_IX86)
-#      define VOLATILE_IN_SEQUENCE 1
-#    else /* I.e. IA64 */
-#      if _MSC_VER >= 1400 
-#        define VOLATILE_IN_SEQUENCE 1
-#      else
-#        define VOLATILE_IN_SEQUENCE 0
-#      endif
-#    endif
-#  endif
-#else
-# define VOLATILE_IN_SEQUENCE 0
-#endif
- 
-
-
-/*
  * Communication with sys_interrupt
  */
 
 #ifdef ERTS_SMP
-extern erts_smp_atomic_t erts_break_requested;
+extern erts_smp_atomic32_t erts_break_requested;
 #define ERTS_SET_BREAK_REQUESTED \
-  erts_smp_atomic_set(&erts_break_requested, (erts_aint_t) 1)
+  erts_smp_atomic32_set(&erts_break_requested, (erts_aint32_t) 1)
 #define ERTS_UNSET_BREAK_REQUESTED \
-  erts_smp_atomic_set(&erts_break_requested, (erts_aint_t) 0)
+  erts_smp_atomic32_set(&erts_break_requested, (erts_aint32_t) 0)
 #else
 extern volatile int erts_break_requested;
 #define ERTS_SET_BREAK_REQUESTED (erts_break_requested = 1)
@@ -424,7 +320,7 @@ extern volatile int erts_break_requested;
 
 static erts_mtx_t break_waiter_lock;
 static HANDLE break_happened_event;
-static erts_atomic_t break_waiter_state;
+static erts_atomic32_t break_waiter_state;
 #define BREAK_WAITER_GOT_BREAK 1
 #define BREAK_WAITER_GOT_HALT 2
 
@@ -467,29 +363,168 @@ do { \
     wait_standby(PS); \
  } while(0)
 
-#if ERTS_POLL_ASYNC_INTERRUPT_SUPPORT && !defined(ERTS_SMP)
+#define ERTS_POLL_NOT_WOKEN		((erts_aint32_t) 0)
+#define ERTS_POLL_WOKEN_IO_READY	((erts_aint32_t) 1)
+#define ERTS_POLL_WOKEN_INTR		((erts_aint32_t) 2)
+#define ERTS_POLL_WOKEN_TIMEDOUT	((erts_aint32_t) 3)
 
 static ERTS_INLINE int
-unset_interrupted_chk(ErtsPollSet ps)
+is_io_ready(ErtsPollSet ps)
 {
-    /* This operation isn't atomic, but we have no need at all for an
-       atomic operation here... */
-    int res = ps->interrupt;
-    ps->interrupt = 0;
-    return res;
+    return erts_atomic32_read(&ps->wakeup_state) == ERTS_POLL_WOKEN_IO_READY;
 }
 
+static ERTS_INLINE void
+woke_up(ErtsPollSet ps)
+{
+    if (erts_atomic32_read(&ps->wakeup_state) == ERTS_POLL_NOT_WOKEN)
+	erts_atomic32_cmpxchg(&ps->wakeup_state,
+			      ERTS_POLL_WOKEN_TIMEDOUT,
+			      ERTS_POLL_NOT_WOKEN);
+#ifdef DEBUG
+    {
+	erts_aint32_t wakeup_state = erts_atomic32_read(&ps->wakeup_state);
+	switch (wakeup_state) {
+	case ERTS_POLL_WOKEN_IO_READY:
+	case ERTS_POLL_WOKEN_INTR:
+	case ERTS_POLL_WOKEN_TIMEDOUT:
+	    break;
+	default:
+	    ASSERT(0);
+	    break;
+	}
+    }
 #endif
+}
+
+static ERTS_INLINE int
+wakeup_cause(ErtsPollSet ps)
+{
+    int res;
+    erts_aint32_t wakeup_state = erts_atomic32_read(&ps->wakeup_state);
+    switch (wakeup_state) {
+    case ERTS_POLL_WOKEN_IO_READY:
+	res = 0;
+	break;
+    case ERTS_POLL_WOKEN_INTR:
+	res = EINTR;
+	break;
+    case ERTS_POLL_WOKEN_TIMEDOUT:
+	res = ETIMEDOUT;
+	break;
+    default:
+	res = 0;
+	erl_exit(ERTS_ABORT_EXIT,
+		 "%s:%d: Internal error: Invalid wakeup_state=%d\n",
+		 __FILE__, __LINE__, (int) wakeup_state);
+    }
+    return res;
+}
+
+static ERTS_INLINE DWORD
+poll_wait_timeout(ErtsPollSet ps, SysTimeval *tvp)
+{
+    time_t timeout = tvp->tv_sec * 1000 + tvp->tv_usec / 1000;
+
+    if (timeout <= 0) {
+	woke_up(ps);
+	return (DWORD) 0;
+    }
+
+    ResetEvent(ps->event_io_ready);
+    /*
+     * Since we don't know the internals of ResetEvent() we issue
+     * a memory barrier as a safety precaution ensuring that
+     * the load of wakeup_state wont be reordered with stores made
+     * by ResetEvent().
+     */
+    ERTS_THR_MEMORY_BARRIER;
+    if (erts_atomic32_read(&ps->wakeup_state) != ERTS_POLL_NOT_WOKEN)
+	return (DWORD) 0;
+
+    if (timeout > ERTS_AINT32_T_MAX) /* Also prevents DWORD overflow */
+	timeout = ERTS_AINT32_T_MAX;
+
+    erts_smp_atomic32_set_relb(&ps->timeout, (erts_aint32_t) timeout);
+    return (DWORD) timeout;
+}
 
-#ifdef ERTS_SMP
 static ERTS_INLINE void
-wake_poller(ErtsPollSet ps)
+wake_poller(ErtsPollSet ps, int io_ready)
 {
-    if (!ERTS_POLLSET_SET_POLLER_WOKEN_CHK(ps)) {
+    erts_aint32_t wakeup_state = erts_atomic32_read(&ps->wakeup_state);
+    if (io_ready) {
+	/* We may set the event multiple times. This is, however, harmless. */
+	erts_atomic32_set(&ps->wakeup_state, ERTS_POLL_WOKEN_IO_READY);
+    }
+    else {
+	while (wakeup_state != ERTS_POLL_WOKEN_IO_READY
+	       && wakeup_state != ERTS_POLL_WOKEN_INTR) {
+	    erts_aint32_t act = erts_atomic32_cmpxchg(&ps->wakeup_state,
+						      ERTS_POLL_WOKEN_INTR,
+						      wakeup_state);
+	    if (act == wakeup_state) {
+		wakeup_state = act;
+		break;
+	    }
+	    wakeup_state = act;
+	}
+    }
+    if (wakeup_state == ERTS_POLL_NOT_WOKEN) {
+	/*
+	 * Since we don't know the internals of SetEvent() we issue
+	 * a memory barrier as a safety precaution ensuring that
+	 * the store we just made to wakeup_state wont be reordered
+	 * with loads in SetEvent().
+	 */
+	ERTS_THR_MEMORY_BARRIER;
 	SetEvent(ps->event_io_ready);
     }
 }
-#endif
+
+static ERTS_INLINE void
+reset_io_ready(ErtsPollSet ps)
+{
+    erts_atomic32_set(&ps->wakeup_state, ERTS_POLL_NOT_WOKEN);
+}
+
+static ERTS_INLINE void
+restore_io_ready(ErtsPollSet ps)
+{
+    erts_atomic32_set(&ps->wakeup_state, ERTS_POLL_WOKEN_IO_READY);
+}
+
+/*
+ * notify_io_ready() is used by threads waiting for events, when
+ * notifying a poller thread about I/O ready.
+ */
+static ERTS_INLINE void
+notify_io_ready(ErtsPollSet ps)
+{
+    wake_poller(ps, 1);
+}
+
+static ERTS_INLINE void
+reset_interrupt(ErtsPollSet ps)
+{
+    /* We need to keep io-ready if set */
+    erts_aint32_t wakeup_state = erts_atomic32_read(&ps->wakeup_state);
+    while (wakeup_state != ERTS_POLL_WOKEN_IO_READY
+	   && wakeup_state != ERTS_POLL_NOT_WOKEN) {
+	erts_aint32_t act = erts_atomic32_cmpxchg(&ps->wakeup_state,
+						  ERTS_POLL_NOT_WOKEN,
+						  wakeup_state);
+	if (wakeup_state == act)
+	    break;
+	wakeup_state = act;
+    }
+}
+
+static ERTS_INLINE void
+set_interrupt(ErtsPollSet ps)
+{
+    wake_poller(ps, 0);
+}
 
 static void setup_standby_wait(ErtsPollSet ps, int num_threads)
 {
@@ -653,14 +688,14 @@ static void *break_waiter(void *param)
 	case WAIT_OBJECT_0:
 	    ResetEvent(harr[0]);
 	    erts_mtx_lock(&break_waiter_lock);
-	    erts_atomic_set(&break_waiter_state,BREAK_WAITER_GOT_BREAK);
+	    erts_atomic32_set(&break_waiter_state,BREAK_WAITER_GOT_BREAK);
 	    SetEvent(break_happened_event);
 	    erts_mtx_unlock(&break_waiter_lock);
 	    break;
 	case (WAIT_OBJECT_0+1):
 	    ResetEvent(harr[1]);
 	    erts_mtx_lock(&break_waiter_lock);
-	    erts_atomic_set(&break_waiter_state,BREAK_WAITER_GOT_HALT);
+	    erts_atomic32_set(&break_waiter_state,BREAK_WAITER_GOT_HALT);
 	    SetEvent(break_happened_event);
 	    erts_mtx_unlock(&break_waiter_lock);
 	    break;
@@ -767,12 +802,7 @@ event_happened:
 	    consistency_check(w);
 #endif
 	    ASSERT(WAIT_OBJECT_0 < i && i < WAIT_OBJECT_0+w->active_events);
-	    if (!erts_atomic_xchg(&ps->sys_io_ready,1)) { 
-		HARDDEBUGF(("SET EventIoReady (%d)",erts_atomic_read(&ps->sys_io_ready)));
-		SetEvent(ps->event_io_ready);
-	    } else {
-		HARDDEBUGF(("DONT SET EventIoReady"));
-	    }
+	    notify_io_ready(ps);
 
 	    /* 
 	     * The main thread wont start working on our arrays untill we're
@@ -967,15 +997,10 @@ static int cancel_driver_select(ErtsPollSet ps, HANDLE event)
 void  erts_poll_interrupt(ErtsPollSet ps, int set /* bool */)
 {
     HARDTRACEF(("In erts_poll_interrupt(%d)",set));
-#ifdef ERTS_SMP
-    if (set) {
-	ERTS_POLLSET_SET_INTERRUPTED(ps);
-	wake_poller(ps);
-    }
-    else {
-	ERTS_POLLSET_UNSET_INTERRUPTED(ps);
-    }
-#endif
+    if (!set)
+	reset_interrupt(ps);
+    else
+	set_interrupt(ps);
     HARDTRACEF(("Out erts_poll_interrupt(%d)",set));
 }
 
@@ -984,17 +1009,10 @@ void erts_poll_interrupt_timed(ErtsPollSet ps,
 			       long msec)
 {
     HARDTRACEF(("In erts_poll_interrupt_timed(%d,%ld)",set,msec));
-#ifdef ERTS_SMP
-    if (set) {
-	if (erts_smp_atomic_read(&ps->timeout) > (erts_aint_t) msec) {
-	    ERTS_POLLSET_SET_INTERRUPTED(ps);
-	    wake_poller(ps);
-	}
-    }
-    else {
-	ERTS_POLLSET_UNSET_INTERRUPTED(ps);
-    }
-#endif
+    if (!set)
+	reset_interrupt(ps);
+    else if (erts_smp_atomic32_read_acqb(&ps->timeout) > (erts_aint32_t) msec)
+	set_interrupt(ps);
     HARDTRACEF(("Out erts_poll_interrupt_timed"));
 }
 
@@ -1068,10 +1086,8 @@ void erts_poll_controlv(ErtsPollSet ps,
 int erts_poll_wait(ErtsPollSet ps,
 		   ErtsPollResFd pr[],
 		   int *len,
-		   SysTimeval *utvp)
+		   SysTimeval *tvp)
 {
-    SysTimeval *tvp = utvp;
-    SysTimeval itv;
     int no_fds;
     DWORD timeout;
     EventData* ev;
@@ -1084,7 +1100,7 @@ int erts_poll_wait(ErtsPollSet ps,
     HARDTRACEF(("In erts_poll_wait"));
     ERTS_POLLSET_LOCK(ps);
 
-    if (!erts_atomic_read(&ps->sys_io_ready) && ps->restore_events) {
+    if (!is_io_ready(ps) && ps->restore_events) {
 	HARDDEBUGF(("Restore events: %d",ps->num_waiters));
 	ps->restore_events = 0;
 	for (i = 0; i < ps->num_waiters; ++i) {
@@ -1102,7 +1118,7 @@ int erts_poll_wait(ErtsPollSet ps,
 	       if (w->highwater != w->active_events) {
 		   HARDDEBUGF(("Oups!"));
 		   /* Oups, got signalled before we took the lock, can't reset */
-		   if(erts_atomic_read(&ps->sys_io_ready) == 0) {
+		   if(!is_io_ready(ps)) {
 		       erl_exit(1,"Internal error: "
 				"Inconsistent io structures in erl_poll.\n");
 		   }
@@ -1127,39 +1143,27 @@ int erts_poll_wait(ErtsPollSet ps,
 	no_fds = ERTS_POLL_MAX_RES;
 #endif
 
+    timeout = poll_wait_timeout(ps, tvp);
 
-    ResetEvent(ps->event_io_ready);
-    ERTS_POLLSET_UNSET_POLLER_WOKEN(ps);
-
-#ifdef ERTS_SMP
-    if (ERTS_POLLSET_IS_INTERRUPTED(ps)) {
-	/* Interrupt use zero timeout */
-	itv.tv_sec = 0;
-	itv.tv_usec = 0;
-	tvp = &itv;
-    }
-#endif
-
-    timeout = tvp->tv_sec * 1000 + tvp->tv_usec / 1000;
     /*HARDDEBUGF(("timeout = %ld",(long) timeout));*/
-    erts_smp_atomic_set(&ps->timeout, timeout);
 
-    if (timeout > 0 && ! erts_atomic_read(&ps->sys_io_ready) && ! erts_atomic_read(&break_waiter_state)) {
+    if (timeout > 0 && !erts_atomic32_read(&break_waiter_state)) {
 	HANDLE harr[2] = {ps->event_io_ready, break_happened_event};
 	int num_h = 2;
 
-	HARDDEBUGF(("Start waiting %d [%d]",num_h, (long) timeout));
+	HARDDEBUGF(("Start waiting %d [%d]",num_h, (int) timeout));
 	ERTS_POLLSET_UNLOCK(ps);
 	WaitForMultipleObjects(num_h, harr, FALSE, timeout);
 	ERTS_POLLSET_LOCK(ps);
-	HARDDEBUGF(("Stop waiting %d [%d]",num_h, (long) timeout));
+	HARDDEBUGF(("Stop waiting %d [%d]",num_h, (int) timeout));
+	woke_up(ps);
     }
 
     ERTS_UNSET_BREAK_REQUESTED;
-    if(erts_atomic_read(&break_waiter_state)) {
+    if(erts_atomic32_read(&break_waiter_state)) {
 	erts_mtx_lock(&break_waiter_lock);
-	break_state = erts_atomic_read(&break_waiter_state);
-	erts_atomic_set(&break_waiter_state,0);
+	break_state = erts_atomic32_read(&break_waiter_state);
+	erts_atomic32_set(&break_waiter_state,0);
 	ResetEvent(break_happened_event);
 	erts_mtx_unlock(&break_waiter_lock);
 	switch (break_state) {
@@ -1174,15 +1178,13 @@ int erts_poll_wait(ErtsPollSet ps,
 	}
     }
 
-    ERTS_POLLSET_SET_POLLER_WOKEN(ps);
-
-    if (!erts_atomic_read(&ps->sys_io_ready)) {
-	res = EINTR;
-	HARDDEBUGF(("EINTR!"));
-	goto done; 
+    res = wakeup_cause(ps);
+    if (res != 0) {
+	HARDDEBUGF(("%s!", res == EINTR ? "EINTR" : "ETIMEDOUT"));
+	goto done;
     }
 
-    erts_atomic_set(&ps->sys_io_ready,0);
+    reset_io_ready(ps);
 
     n = ps->num_waiters;	
 
@@ -1204,9 +1206,9 @@ int erts_poll_wait(ErtsPollSet ps,
 	    if (num >= no_fds) {
 		w->highwater=j+1;
 		erts_mtx_unlock(&w->mtx);
-		/* This might mean we still have data to report, set
-		   back the global flag! */
-		erts_atomic_set(&ps->sys_io_ready,1);
+		/* This might mean we still have data to report,
+		   restore flag indicating I/O ready! */
+		restore_io_ready(ps);
 		HARDDEBUGF(("To many FD's to report!"));
 		goto done;
 	    }
@@ -1228,7 +1230,7 @@ int erts_poll_wait(ErtsPollSet ps,
 	erts_mtx_unlock(&w->mtx);
     }
  done:
-    erts_smp_atomic_set(&ps->timeout, ERTS_AINT_T_MAX);
+    erts_smp_atomic32_set(&ps->timeout, ERTS_AINT32_T_MAX);
     *len = num;
     ERTS_POLLSET_UNLOCK(ps);
     HARDTRACEF(("Out erts_poll_wait"));
@@ -1306,15 +1308,13 @@ ErtsPollSet erts_poll_create_pollset(void)
     ps->standby_wait_counter = 0;
     ps->event_io_ready = CreateManualEvent(FALSE);
     ps->standby_wait_event = CreateManualEvent(FALSE); 
-    erts_atomic_init(&ps->sys_io_ready,0);
     ps->restore_events = 0;
 
+    erts_atomic32_init(&ps->wakeup_state, ERTS_POLL_NOT_WOKEN);
 #ifdef ERTS_SMP
-    erts_smp_atomic_init(&ps->woken, 0);
     erts_smp_mtx_init(&ps->mtx, "pollset");
-    erts_smp_atomic_init(&ps->interrupt, 0);
 #endif
-    erts_smp_atomic_init(&ps->timeout, ERTS_AINT_T_MAX);
+    erts_smp_atomic32_init(&ps->timeout, ERTS_AINT32_T_MAX);
 
     HARDTRACEF(("Out erts_poll_create_pollset"));
     return ps;
@@ -1366,7 +1366,7 @@ void  erts_poll_init(void)
 
     erts_mtx_init(&break_waiter_lock,"break_waiter_lock");
     break_happened_event = CreateManualEvent(FALSE);
-    erts_atomic_init(&break_waiter_state, 0); 
+    erts_atomic32_init(&break_waiter_state, 0); 
 
     erts_thr_create(&thread, &break_waiter, NULL, NULL);
     ERTS_UNSET_BREAK_REQUESTED;
diff --git a/erts/emulator/sys/win32/sys_interrupt.c b/erts/emulator/sys/win32/sys_interrupt.c
index 262f84babc..943c338794 100644
--- a/erts/emulator/sys/win32/sys_interrupt.c
+++ b/erts/emulator/sys/win32/sys_interrupt.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  * 
- * Copyright Ericsson AB 1997-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1997-2011. All Rights Reserved.
  * 
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -31,11 +31,11 @@
 #endif
 
 #ifdef ERTS_SMP
-erts_smp_atomic_t erts_break_requested;
+erts_smp_atomic32_t erts_break_requested;
 #define ERTS_SET_BREAK_REQUESTED \
-  erts_smp_atomic_set(&erts_break_requested, (erts_aint_t) 1)
+  erts_smp_atomic32_set(&erts_break_requested, (erts_aint32_t) 1)
 #define ERTS_UNSET_BREAK_REQUESTED \
-  erts_smp_atomic_set(&erts_break_requested, (erts_aint_t) 0)
+  erts_smp_atomic32_set(&erts_break_requested, (erts_aint32_t) 0)
 #else
 volatile int erts_break_requested = 0;
 #define ERTS_SET_BREAK_REQUESTED (erts_break_requested = 1)
diff --git a/erts/emulator/test/a_SUITE.erl b/erts/emulator/test/a_SUITE.erl
index e9d653a7c4..784869251a 100644
--- a/erts/emulator/test/a_SUITE.erl
+++ b/erts/emulator/test/a_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2006-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2006-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -26,15 +26,32 @@
 %%%-------------------------------------------------------------------
 -module(a_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1, long_timers/1, pollset_size/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, long_timers/1, pollset_size/1]).
 
-all(doc) ->
-    [];
-all(suite) ->
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
     [long_timers, pollset_size].
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 long_timers(doc) ->
     [];
 long_timers(suite) ->
diff --git a/erts/emulator/test/after_SUITE.erl b/erts/emulator/test/after_SUITE.erl
index 3e1a871408..78ac099792 100644
--- a/erts/emulator/test/after_SUITE.erl
+++ b/erts/emulator/test/after_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -21,27 +21,48 @@
 
 %% Tests receive after.
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1, t_after/1, receive_after/1, receive_after_big/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 t_after/1, receive_after/1, receive_after_big/1,
 	 receive_after_errors/1, receive_var_zero/1, receive_zero/1,
 	 multi_timeout/1, receive_after_32bit/1]).
 
--export([init_per_testcase/2, fin_per_testcase/2]).
+-export([init_per_testcase/2, end_per_testcase/2]).
 
 %% Internal exports.
 
 -export([timeout_g/0]).
 
-all(suite) ->
-    [t_after, receive_after, receive_after_big, receive_after_errors,
-     receive_var_zero, receive_zero, multi_timeout, receive_after_32bit].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [t_after, receive_after, receive_after_big,
+     receive_after_errors, receive_var_zero, receive_zero,
+     multi_timeout, receive_after_32bit].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog=?t:timetrap(?t:minutes(3)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
diff --git a/erts/emulator/test/alloc_SUITE.erl b/erts/emulator/test/alloc_SUITE.erl
index 94766dc6e9..687a4f0d5a 100644
--- a/erts/emulator/test/alloc_SUITE.erl
+++ b/erts/emulator/test/alloc_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2003-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2003-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -18,7 +18,8 @@
 
 -module(alloc_SUITE).
 -author('[email protected]').
--export([all/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2]).
 
 -export([basic/1,
 	 coalesce/1,
@@ -29,28 +30,40 @@
 	 rbtree/1,
 	 mseg_clear_cache/1]).
 
--export([init_per_testcase/2, fin_per_testcase/2]).
+-export([init_per_testcase/2, end_per_testcase/2]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 -define(DEFAULT_TIMETRAP_SECS, 240).
 
-all(doc) -> [];
-all(suite) -> [basic,
-	       coalesce,
-	       threads,
-	       realloc_copy,
-	       bucket_index,
-	       bucket_mask,
-	       rbtree,
-	       mseg_clear_cache].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [basic, coalesce, threads, realloc_copy, bucket_index,
+     bucket_mask, rbtree, mseg_clear_cache].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 
 init_per_testcase(Case, Config) when is_list(Config) ->
     Dog = ?t:timetrap(?t:seconds(?DEFAULT_TIMETRAP_SECS)),
     [{watchdog, Dog},{testcase, Case}|Config].
 
-fin_per_testcase(_Case, Config) when is_list(Config) ->
+end_per_testcase(_Case, Config) when is_list(Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog),
     ok.
diff --git a/erts/emulator/test/beam_SUITE.erl b/erts/emulator/test/beam_SUITE.erl
index 228ff15341..3643750883 100644
--- a/erts/emulator/test/beam_SUITE.erl
+++ b/erts/emulator/test/beam_SUITE.erl
@@ -19,16 +19,37 @@
 
 -module(beam_SUITE).
 
--export([all/1, packed_registers/1, apply_last/1, apply_last_bif/1,
-	 buildo_mucho/1, heap_sizes/1, big_lists/1, fconv/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 packed_registers/1, apply_last/1, apply_last_bif/1,
+	 buildo_mucho/1, heap_sizes/1, big_lists/1, fconv/1,
+	 select_val/1]).
 
 -export([applied/2]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [packed_registers, apply_last, apply_last_bif,
+     buildo_mucho, heap_sizes, big_lists, select_val].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) ->
-    [packed_registers, apply_last, apply_last_bif, buildo_mucho,
-     heap_sizes, big_lists].
 
 
 %% Verify that apply(M, F, A) is really tail recursive.
@@ -302,3 +323,19 @@ do_fconv(nil, Float) when is_float(Float) ->
     Float + [];
 do_fconv(tuple_literal, Float) when is_float(Float) ->
     Float + {a,b}.
+
+select_val(Config) when is_list(Config) ->
+    ?line zero = do_select_val(0),
+    ?line big = do_select_val(1 bsl 64),
+    ?line integer = do_select_val(42),
+    ok.
+
+do_select_val(X) ->
+    case X of
+	0 ->
+	    zero;
+	1 bsl 64 ->
+	    big;
+	Int when is_integer(Int) ->
+	    integer
+    end.
diff --git a/erts/emulator/test/beam_literals_SUITE.erl b/erts/emulator/test/beam_literals_SUITE.erl
index 75841adbfc..3ab7fc615b 100644
--- a/erts/emulator/test/beam_literals_SUITE.erl
+++ b/erts/emulator/test/beam_literals_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -18,21 +18,41 @@
 %%
 
 -module(beam_literals_SUITE).
--export([all/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2]).
 -export([putting/1, matching_smalls/1, matching_smalls_jt/1,
 	 matching_bigs/1, matching_more_bigs/1,
 	 matching_bigs_and_smalls/1, badmatch/1, case_clause/1,
 	 receiving/1, literal_type_tests/1,
-	 put_list/1, fconv/1, literal_case_expression/1]).
+	 put_list/1, fconv/1, literal_case_expression/1,
+	 increment/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
-all(suite) ->
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
     [putting, matching_smalls, matching_smalls_jt,
      matching_bigs, matching_more_bigs,
      matching_bigs_and_smalls, badmatch, case_clause,
-     receiving, literal_type_tests,
-     put_list, fconv, literal_case_expression].
+     receiving, literal_type_tests, put_list, fconv,
+     literal_case_expression, increment].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 putting(doc) -> "Test creating lists and tuples containing big number literals.";
 putting(Config) when is_list(Config) ->
@@ -48,6 +68,7 @@ matching_bigs(doc) -> "Test matching of a few big number literals (in Beam,"
 matching_bigs(Config) when is_list(Config) ->
     a = matching1(3972907842873739),
     b = matching1(-389789298378939783333333333333333333784),
+    other = matching1(3141699999999999999999999999999999999),
     other = matching1(42).
 
 matching_smalls(doc) -> "Test matching small numbers (both positive and negative).";
@@ -236,14 +257,14 @@ make_test([{T,L}|Ts]) ->
 make_test([]) -> [].
 
 test(T, L) ->
-    S = lists:flatten(io_lib:format("begin io:format(\"~~p~~n\", [{~p,~p}]), if ~w(~w) -> true; true -> false end end. ", [T, L, T, L])),
+    S = lists:flatten(io_lib:format("begin io:format(\"~~p~n\", [{~p,~p}]), if ~w(~w) -> true; true -> false end end. ", [T, L, T, L])),
     {ok,Toks,_Line} = erl_scan:string(S),
     {ok,E} = erl_parse:parse_exprs(Toks),
     {value,Val,_Bs} = erl_eval:exprs(E, []),
     {match,0,{atom,0,Val},hd(E)}.
 
 test(T, A, L) ->
-    S = lists:flatten(io_lib:format("begin io:format(\"~~p~~n\", [{~p,~p,~p}]), if ~w(~w, ~w) -> true; true -> false end end. ",
+    S = lists:flatten(io_lib:format("begin io:format(\"~~p~n\", [{~p,~p,~p}]), if ~w(~w, ~w) -> true; true -> false end end. ",
 				    [T,L,A,T,L,A])),
     {ok,Toks,_Line} = erl_scan:string(S),
     {ok,E} = erl_parse:parse_exprs(Toks),
@@ -405,14 +426,51 @@ fconv_2(F) when is_float(F) ->
 literal_case_expression(Config) when is_list(Config) ->
     ?line DataDir = ?config(data_dir, Config),
     ?line Src = filename:join(DataDir, "literal_case_expression"),
-    ?line {ok,literal_case_expression=Mod,Code} = compile:file(Src, [from_asm,binary]),
+    ?line {ok,literal_case_expression=Mod,Code} =
+	compile:file(Src, [from_asm,binary]),
     ?line {module,Mod} = code:load_binary(Mod, Src, Code),
     ?line ok = Mod:x(),
     ?line ok = Mod:y(),
+    ?line ok = Mod:zi1(),
+    ?line ok = Mod:zi2(),
+    ?line ok = Mod:za1(),
+    ?line ok = Mod:za2(),
     ?line true = code:delete(Mod),
     ?line code:purge(Mod),
     ok.
 
+%% Test the i_increment instruction.
+increment(Config) when is_list(Config) ->
+    %% In the 32-bit emulator, Neg32 can be represented as a small,
+    %% but -Neg32 cannot. Therefore the i_increment instruction must
+    %% not be used in the subtraction that follows (since i_increment
+    %% cannot handle a bignum literal).
+    Neg32 = -(1 bsl 27),
+    Big32 = id(1 bsl 32),
+    Result32 = (1 bsl 32) + (1 bsl 27),
+    ?line Result32 = Big32 + (1 bsl 27),
+    ?line Result32 = Big32 - Neg32,
+
+    %% Same thing, but for the 64-bit emulator.
+    Neg64 = -(1 bsl 59),
+    Big64 = id(1 bsl 64),
+    Result64 = (1 bsl 64) + (1 bsl 59),
+    ?line Result64 = Big64 + (1 bsl 59),
+    ?line Result64 = Big64 - Neg64,
+
+    %% Test error handling for the i_increment instruction.
+    Bad = id(bad),
+    ?line {'EXIT',{badarith,_}} = (catch Bad + 42),
+
+    %% Small operands, but a big result.
+    Res32 = 1 bsl 27,
+    Small32 = id(Res32-1),
+    ?line Res32 = Small32 + 1,
+    Res64 = 1 bsl 59,
+    Small64 = id(Res64-1),
+    ?line Res64 = Small64 + 1,
+    ok.
+
 %% Help functions.
 
 chksum(Term) ->
diff --git a/erts/emulator/test/beam_literals_SUITE_data/literal_case_expression.S b/erts/emulator/test/beam_literals_SUITE_data/literal_case_expression.S
index c0ffe9ab53..bfdfc079dc 100644
--- a/erts/emulator/test/beam_literals_SUITE_data/literal_case_expression.S
+++ b/erts/emulator/test/beam_literals_SUITE_data/literal_case_expression.S
@@ -1,10 +1,11 @@
 {module, literal_case_expression}.  %% version = 0
 
-{exports, [{module_info,0},{module_info,1},{x,0},{y,0}]}.
+{exports, [{module_info,0},{module_info,1},{x,0},{y,0},
+	   {zi1,0},{zi2,0},{za1,0},{za2,0}]}.
 
 {attributes, []}.
 
-{labels, 15}.
+{labels, 32}.
 
 
 {function, x, 0, 2}.
@@ -52,6 +53,81 @@
   {label,10}.
     {case_end,{float,34.0000}}.
 
+{function, zi1, 0, 16}.
+  {label,15}.
+    {func_info,{atom,literal_case_expression},{atom,zi1},0}.
+  {label,16}.
+    {test,is_integer,{f,19},[{integer,42}]}.
+    {select_val,{integer,42},
+                {f,18},
+                {list,[{integer,42},
+                       {f,17},
+                       {integer,1000},
+                       {f,18}]}}.
+  {label,17}.
+    {move,{atom,ok},{x,0}}.
+    return.
+  {label,18}.
+    {move,{atom,error},{x,0}}.
+    return.
+  {label,19}.
+    {case_end,{integer,42}}.
+
+{function, zi2, 0, 16}.
+  {label,20}.
+    {func_info,{atom,literal_case_expression},{atom,zi2},0}.
+  {label,21}.
+    {test,is_integer,{f,23},[{integer,42}]}.
+    {select_val,{integer,42},
+                {f,23},
+                {list,[{integer,42},
+                       {f,22},
+                       {integer,1000},
+                       {f,23}]}}.
+  {label,22}.
+    {move,{atom,ok},{x,0}}.
+    return.
+  {label,23}.
+    {move,{atom,error},{x,0}}.
+    return.
+
+{function, za1, 0, 25}.
+  {label,24}.
+    {func_info,{atom,literal_case_expression},{atom,za1},0}.
+  {label,25}.
+    {test,is_atom,{f,28},[{atom,x}]}.
+    {select_val,{atom,x},
+                {f,27},
+                {list,[{atom,a},
+                       {f,27},
+                       {atom,x},
+                       {f,26}]}}.
+  {label,26}.
+    {move,{atom,ok},{x,0}}.
+    return.
+  {label,27}.
+    {move,{atom,error},{x,0}}.
+    return.
+  {label,28}.
+    {case_end,{atom,x}}.
+
+{function, za2, 0, 30}.
+  {label,29}.
+    {func_info,{atom,literal_case_expression},{atom,za2},0}.
+  {label,30}.
+    {test,is_atom,{f,32},[{atom,x}]}.
+    {select_val,{atom,x},
+                {f,32},
+                {list,[{atom,a},
+                       {f,32},
+                       {atom,x},
+                       {f,31}]}}.
+  {label,31}.
+    {move,{atom,ok},{x,0}}.
+    return.
+  {label,32}.
+    {move,{atom,error},{x,0}}.
+    return.
 
 {function, module_info, 0, 12}.
   {label,11}.
diff --git a/erts/emulator/test/bif_SUITE.erl b/erts/emulator/test/bif_SUITE.erl
index b4ef0e6d5a..016befdced 100644
--- a/erts/emulator/test/bif_SUITE.erl
+++ b/erts/emulator/test/bif_SUITE.erl
@@ -19,24 +19,44 @@
 
 -module(bif_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
 	 types/1,
 	 t_list_to_existing_atom/1,os_env/1,otp_7526/1,
 	 binary_to_atom/1,binary_to_existing_atom/1,
 	 atom_to_binary/1,min_max/1]).
 
-all(suite) ->
-    [types,t_list_to_existing_atom,os_env,otp_7526,
-     atom_to_binary,binary_to_atom,binary_to_existing_atom,
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [types, t_list_to_existing_atom, os_env, otp_7526,
+     atom_to_binary, binary_to_atom, binary_to_existing_atom,
      min_max].
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog=?t:timetrap(?t:minutes(1)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
diff --git a/erts/emulator/test/big_SUITE.erl b/erts/emulator/test/big_SUITE.erl
index 6cedd39009..60b19af68e 100644
--- a/erts/emulator/test/big_SUITE.erl
+++ b/erts/emulator/test/big_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,9 +19,10 @@
 -module(big_SUITE).
 
 
--export([all/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2]).
 -export([t_div/1, eq_28/1, eq_32/1, eq_big/1, eq_math/1, big_literals/1,
-	 borders/1, negative/1, big_float/1, big_float_1/1, big_float_2/1,
+	 borders/1, negative/1, big_float_1/1, big_float_2/1,
 	 shift_limit_1/1, powmod/1, system_limit/1, otp_6692/1]).
 
 %% Internal exports.
@@ -30,19 +31,38 @@
 
 -export([fac/1, fib/1, pow/2, gcd/2, lcm/2]).
 
--export([init_per_testcase/2, fin_per_testcase/2]).
+-export([init_per_testcase/2, end_per_testcase/2]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [t_div, eq_28, eq_32, eq_big, eq_math, big_literals,
+     borders, negative, {group, big_float}, shift_limit_1,
+     powmod, system_limit, otp_6692].
+
+groups() -> 
+    [{big_float, [], [big_float_1, big_float_2]}].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) ->
-    [t_div, eq_28, eq_32, eq_big, eq_math, big_literals, borders,
-     negative, big_float, shift_limit_1, powmod, system_limit, otp_6692].
 
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog=?t:timetrap(?t:minutes(3)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
@@ -260,10 +280,6 @@ big_literals(Config) when is_list(Config) ->
     ?line ok = Mod:t(),
     ok.
 
-big_float(doc) ->
-    ["Test cases for mixing bignums and floats"];
-big_float(suite) ->
-    [big_float_1, big_float_2].
 
 big_float_1(doc) ->
     ["OTP-2436, part 1"];
diff --git a/erts/emulator/test/binary_SUITE.erl b/erts/emulator/test/binary_SUITE.erl
index 77d2579848..7e409f053e 100644
--- a/erts/emulator/test/binary_SUITE.erl
+++ b/erts/emulator/test/binary_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 1997-2010. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2011. All Rights Reserved.
 %%
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -40,9 +40,11 @@
 %%      phash2(Binary, N)
 %%
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1, init_per_testcase/2, fin_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, end_per_testcase/2,
 	 copy_terms/1, conversions/1, deep_lists/1, deep_bitstr_lists/1,
 	 bad_list_to_binary/1, bad_binary_to_list/1,
 	 t_split_binary/1, bad_split/1, t_concat_binary/1,
@@ -61,24 +63,42 @@
 %% Internal exports.
 -export([sleeper/0]).
 
-all(suite) ->
-    [copy_terms,conversions,deep_lists,deep_bitstr_lists,
+suite() -> [{ct_hooks,[ts_install_cth]},
+	    {timetrap,{minutes,2}}].
+
+all() -> 
+    [copy_terms, conversions, deep_lists, deep_bitstr_lists,
      t_split_binary, bad_split, t_concat_binary,
-     bad_list_to_binary, bad_binary_to_list, terms, terms_float,
-     external_size, t_iolist_size,
-     bad_binary_to_term_2,safe_binary_to_term2,
-     bad_binary_to_term, bad_terms, t_hash, bad_size, bad_term_to_binary,
-     more_bad_terms, otp_5484, otp_5933, ordering, unaligned_order,
-     gc_test, bit_sized_binary_sizes, otp_6817, otp_8117,
-     deep,obsolete_funs,robustness,otp_8180].
+     bad_list_to_binary, bad_binary_to_list, terms,
+     terms_float, external_size, t_iolist_size,
+     bad_binary_to_term_2, safe_binary_to_term2,
+     bad_binary_to_term, bad_terms, t_hash, bad_size,
+     bad_term_to_binary, more_bad_terms, otp_5484, otp_5933,
+     ordering, unaligned_order, gc_test,
+     bit_sized_binary_sizes, otp_6817, otp_8117, deep,
+     obsolete_funs, robustness, otp_8180].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
-    Dog=?t:timetrap(?t:minutes(2)),
-    [{watchdog, Dog}|Config].
+    Config.
 
-fin_per_testcase(_Func, Config) ->
-    Dog=?config(watchdog, Config),
-    ?t:timetrap_cancel(Dog).
+end_per_testcase(_Func, _Config) ->
+    ok.
 
 -define(heap_binary_size, 64).
 
@@ -1041,7 +1061,7 @@ test_terms(Test_Func) ->
     ?line Test_Func(F = fun(A) -> 42*A end),
     ?line Test_Func(lists:duplicate(32, F)),
 
-    ?line Test_Func(FF = fun binary_SUITE:all/1),
+    ?line Test_Func(FF = fun binary_SUITE:all/0),
     ?line Test_Func(lists:duplicate(32, FF)),
 
     ok.
@@ -1301,11 +1321,4 @@ unaligned_sub_bin(Bin0, Offs) ->
     <<_:Offs,Bin:Sz/binary,_:Roffs>> = id(Bin1),
     Bin.
 
-hostname() ->
-    from($@, atom_to_list(node())).
-
-from(H, [H | T]) -> T;
-from(H, [_ | T]) -> from(H, T);
-from(_, []) -> [].
-
 id(I) -> I.
diff --git a/erts/emulator/test/bs_bincomp_SUITE.erl b/erts/emulator/test/bs_bincomp_SUITE.erl
index 4e83d97689..c0d64c263e 100644
--- a/erts/emulator/test/bs_bincomp_SUITE.erl
+++ b/erts/emulator/test/bs_bincomp_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2006-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2006-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -22,15 +22,34 @@
 
 -module(bs_bincomp_SUITE).
 
--export([all/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
 	 byte_aligned/1,bit_aligned/1,extended_byte_aligned/1,
 	 extended_bit_aligned/1,mixed/1,tracing/1]).
 
--include("test_server.hrl").
+-include_lib("common_test/include/ct.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [byte_aligned, bit_aligned, extended_byte_aligned,
+     extended_bit_aligned, mixed, tracing].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) ->
-    [byte_aligned,bit_aligned,extended_byte_aligned,
-     extended_bit_aligned,mixed,tracing].
 
 
 byte_aligned(Config) when is_list(Config) ->
diff --git a/erts/emulator/test/bs_bit_binaries_SUITE.erl b/erts/emulator/test/bs_bit_binaries_SUITE.erl
index 52bb925385..76d2661592 100644
--- a/erts/emulator/test/bs_bit_binaries_SUITE.erl
+++ b/erts/emulator/test/bs_bit_binaries_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2006-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2006-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -22,18 +22,38 @@
 
 -module(bs_bit_binaries_SUITE).
 
--export([all/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
 	 misc/1,horrid_match/1,test_bitstr/1,test_bit_size/1,asymmetric_tests/1,
 	 big_asymmetric_tests/1,binary_to_and_from_list/1,
 	 big_binary_to_and_from_list/1,send_and_receive/1,
 	 send_and_receive_alot/1,append/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [misc, horrid_match, test_bitstr, test_bit_size,
+     asymmetric_tests, big_asymmetric_tests,
+     binary_to_and_from_list, big_binary_to_and_from_list,
+     send_and_receive, send_and_receive_alot, append].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) ->
-    [misc,horrid_match,test_bitstr,test_bit_size,asymmetric_tests,
-     big_asymmetric_tests,binary_to_and_from_list,big_binary_to_and_from_list,
-     send_and_receive,send_and_receive_alot,append].
 
 misc(Config) when is_list(Config) ->
     ?line <<1:100>> = id(<<1:100>>),
diff --git a/erts/emulator/test/bs_construct_SUITE.erl b/erts/emulator/test/bs_construct_SUITE.erl
index 3d9b51d278..dd77278307 100644
--- a/erts/emulator/test/bs_construct_SUITE.erl
+++ b/erts/emulator/test/bs_construct_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -21,22 +21,39 @@
 
 -module(bs_construct_SUITE).
 
--export([all/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
 	 test1/1, test2/1, test3/1, test4/1, test5/1, testf/1,
 	 not_used/1, in_guard/1,
 	 mem_leak/1, coerce_to_float/1, bjorn/1,
 	 huge_float_field/1, huge_binary/1, system_limit/1, badarg/1,
 	 copy_writable_binary/1, kostis/1, dynamic/1, bs_add/1,
-	 otp_7422/1]).
+	 otp_7422/1, zero_width/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
-all(suite) ->
-    [test1, test2, test3, test4, test5, testf,
-     not_used, in_guard, mem_leak, coerce_to_float, bjorn,
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [test1, test2, test3, test4, test5, testf, not_used,
+     in_guard, mem_leak, coerce_to_float, bjorn,
      huge_float_field, huge_binary, system_limit, badarg,
-     copy_writable_binary, kostis, dynamic, bs_add,
-     otp_7422].
+     copy_writable_binary, kostis, dynamic, bs_add, otp_7422, zero_width].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
 big(1) ->
     57285702734876389752897683.
@@ -786,5 +803,20 @@ otp_7422_bin(N) when N < 512 ->
 	       end),
     otp_7422_bin(N+1);
 otp_7422_bin(_) -> ok.
+
+zero_width(Config) when is_list(Config) ->
+    ?line Z = id(0),
+    Small = id(42),
+    Big = id(1 bsl 128),
+    ?line <<>> = <<Small:Z>>,
+    ?line <<>> = <<Small:0>>,
+    ?line <<>> = <<Big:Z>>,
+    ?line <<>> = <<Big:0>>,
+    
+    ?line {'EXIT',{badarg,_}} = (catch <<not_a_number:0>>),
+    ?line {'EXIT',{badarg,_}} = (catch <<(id(not_a_number)):Z>>),
+    ?line {'EXIT',{badarg,_}} = (catch <<(id(not_a_number)):0>>),
+
+    ok.
     
 id(I) -> I.
diff --git a/erts/emulator/test/bs_match_bin_SUITE.erl b/erts/emulator/test/bs_match_bin_SUITE.erl
index 3d054a279f..5a028835e6 100644
--- a/erts/emulator/test/bs_match_bin_SUITE.erl
+++ b/erts/emulator/test/bs_match_bin_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,12 +19,32 @@
 
 -module(bs_match_bin_SUITE).
 
--export([all/1,byte_split_binary/1,bit_split_binary/1,match_huge_bin/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 byte_split_binary/1,bit_split_binary/1,match_huge_bin/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [byte_split_binary, bit_split_binary, match_huge_bin].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) ->
-    [byte_split_binary,bit_split_binary,match_huge_bin].
 
 byte_split_binary(doc) -> "Tries to split a binary at all byte-aligned positions.";
 byte_split_binary(Config) when is_list(Config) ->
diff --git a/erts/emulator/test/bs_match_int_SUITE.erl b/erts/emulator/test/bs_match_int_SUITE.erl
index 99dee7c7bc..093ef906c8 100644
--- a/erts/emulator/test/bs_match_int_SUITE.erl
+++ b/erts/emulator/test/bs_match_int_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -18,16 +18,36 @@
 
 -module(bs_match_int_SUITE).
 
--export([all/1,integer/1,signed_integer/1,dynamic/1,more_dynamic/1,mml/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 integer/1,signed_integer/1,dynamic/1,more_dynamic/1,mml/1,
 	 match_huge_int/1,bignum/1,unaligned_32_bit/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 -import(lists, [seq/2]).
 
-all(suite) ->
-    [integer,signed_integer,dynamic,more_dynamic,mml,match_huge_int,bignum,
-     unaligned_32_bit].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [integer, signed_integer, dynamic, more_dynamic, mml,
+     match_huge_int, bignum, unaligned_32_bit].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 integer(Config) when is_list(Config) ->
     ?line 0 = get_int(mkbin([])),
diff --git a/erts/emulator/test/bs_match_misc_SUITE.erl b/erts/emulator/test/bs_match_misc_SUITE.erl
index 6de2ef67e5..ad21e01f7e 100644
--- a/erts/emulator/test/bs_match_misc_SUITE.erl
+++ b/erts/emulator/test/bs_match_misc_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2000-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2000-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -18,18 +18,38 @@
 %%
 -module(bs_match_misc_SUITE).
 
--export([all/1,bound_var/1,bound_tail/1,t_float/1,little_float/1,sean/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 bound_var/1,bound_tail/1,t_float/1,little_float/1,sean/1,
 	 kenneth/1,encode_binary/1,native/1,happi/1,
 	 size_var/1,wiger/1,x0_context/1,huge_float_field/1,
 	 writable_binary_matched/1,otp_7198/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [bound_var, bound_tail, t_float, little_float, sean,
+     kenneth, encode_binary, native, happi, size_var, wiger,
+     x0_context, huge_float_field, writable_binary_matched,
+     otp_7198].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) ->
-    [bound_var,bound_tail,t_float,little_float,sean,
-     kenneth,encode_binary,native,happi,
-     size_var,wiger,x0_context,huge_float_field,
-     writable_binary_matched,otp_7198].
 
 bound_var(doc) -> "Test matching of bound variables.";
 bound_var(Config) when is_list(Config) ->
diff --git a/erts/emulator/test/bs_match_tail_SUITE.erl b/erts/emulator/test/bs_match_tail_SUITE.erl
index b0b0779b65..b8f7789f60 100644
--- a/erts/emulator/test/bs_match_tail_SUITE.erl
+++ b/erts/emulator/test/bs_match_tail_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -20,11 +20,31 @@
 -module(bs_match_tail_SUITE).
 
 -author('[email protected]').
--export([all/1,aligned/1,unaligned/1,zero_tail/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,aligned/1,unaligned/1,zero_tail/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [aligned, unaligned, zero_tail].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) -> [aligned,unaligned,zero_tail].
 
 aligned(doc) -> "Test aligned tails.";
 aligned(Config) when is_list(Config) ->
diff --git a/erts/emulator/test/bs_utf_SUITE.erl b/erts/emulator/test/bs_utf_SUITE.erl
index 87adc5197b..626a8b4cb6 100644
--- a/erts/emulator/test/bs_utf_SUITE.erl
+++ b/erts/emulator/test/bs_utf_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2008-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2008-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,13 +19,15 @@
 
 -module(bs_utf_SUITE).
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
 	 utf8_roundtrip/1,utf16_roundtrip/1,utf32_roundtrip/1,
 	 utf8_illegal_sequences/1,utf16_illegal_sequences/1,
 	 utf32_illegal_sequences/1,
 	 bad_construction/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 -define(FAIL(Expr), ?line fail_check(catch Expr, ??Expr, [])).
 
@@ -33,14 +35,32 @@ init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog = ?t:timetrap(?t:minutes(6)),
     [{watchdog,Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
-all(suite) ->
-    [utf8_roundtrip,utf16_roundtrip,utf32_roundtrip,
-     utf8_illegal_sequences,utf16_illegal_sequences,
-     utf32_illegal_sequences,bad_construction].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [utf8_roundtrip, utf16_roundtrip, utf32_roundtrip,
+     utf8_illegal_sequences, utf16_illegal_sequences,
+     utf32_illegal_sequences, bad_construction].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 utf8_roundtrip(Config) when is_list(Config) ->
     ?line utf8_roundtrip(0, 16#D7FF),
diff --git a/erts/emulator/test/busy_port_SUITE.erl b/erts/emulator/test/busy_port_SUITE.erl
index 7350aef4ec..e754d161a3 100644
--- a/erts/emulator/test/busy_port_SUITE.erl
+++ b/erts/emulator/test/busy_port_SUITE.erl
@@ -19,21 +19,40 @@
 
 -module(busy_port_SUITE).
 
--export([all/1, io_to_busy/1, message_order/1, send_3/1, 
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 io_to_busy/1, message_order/1, send_3/1, 
 	 system_monitor/1, no_trap_exit/1,
 	 no_trap_exit_unlinked/1, trap_exit/1, multiple_writers/1,
 	 hard_busy_driver/1, soft_busy_driver/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 %% Internal exports.
 -export([init/2]).
 
-all(suite) -> {req, [dynamic_loading],
-	       [io_to_busy, message_order, send_3, 
-		system_monitor, no_trap_exit,
-		no_trap_exit_unlinked, trap_exit, multiple_writers,
-		hard_busy_driver, soft_busy_driver]}.
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [io_to_busy, message_order, send_3, system_monitor,
+     no_trap_exit, no_trap_exit_unlinked, trap_exit,
+     multiple_writers, hard_busy_driver, soft_busy_driver].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 %% Tests I/O operations to a busy port, to make sure a suspended send
 %% operation is correctly restarted.  This used to crash Beam.
diff --git a/erts/emulator/test/call_trace_SUITE.erl b/erts/emulator/test/call_trace_SUITE.erl
index e0528955b0..11e8085cff 100644
--- a/erts/emulator/test/call_trace_SUITE.erl
+++ b/erts/emulator/test/call_trace_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -20,7 +20,9 @@
 
 -module(call_trace_SUITE).
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
 	 hipe/1,process_specs/1,basic/1,flags/1,errors/1,pam/1,change_pam/1,
 	 return_trace/1,exception_trace/1,on_load/1,deep_exception/1,
 	 exception_nocatch/1,bit_syntax/1]).
@@ -35,25 +37,44 @@
 -export([abbr/1,abbr/2]).
 
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 -define(P, 20).
 
-all(suite) ->
-    Common = [errors,on_load],
-    NotHipe = [process_specs,basic,flags,pam,change_pam,return_trace,
-	       exception_trace,deep_exception,exception_nocatch,bit_syntax],
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    Common = [errors, on_load],
+    NotHipe = [process_specs, basic, flags, pam, change_pam,
+	       return_trace, exception_trace, deep_exception,
+	       exception_nocatch, bit_syntax],
     Hipe = [hipe],
-    case test_server:is_native(?MODULE) of
+    case test_server:is_native(call_trace_SUITE) of
 	true -> Hipe ++ Common;
 	false -> NotHipe ++ Common
     end.
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog = ?t:timetrap(?t:seconds(30)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
diff --git a/erts/emulator/test/code_SUITE.erl b/erts/emulator/test/code_SUITE.erl
index 33351a3cc9..703a00a598 100644
--- a/erts/emulator/test/code_SUITE.erl
+++ b/erts/emulator/test/code_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2011. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -18,18 +18,38 @@
 %%
 
 -module(code_SUITE).
--export([all/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
 	 new_binary_types/1,t_check_process_code/1,t_check_process_code_ets/1,
 	 external_fun/1,get_chunk/1,module_md5/1,make_stub/1,
 	 make_stub_many_funs/1,constant_pools/1,
 	 false_dependency/1,coverage/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [new_binary_types, t_check_process_code,
+     t_check_process_code_ets, external_fun, get_chunk,
+     module_md5, make_stub, make_stub_many_funs,
+     constant_pools, false_dependency, coverage].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) ->
-    [new_binary_types,t_check_process_code,t_check_process_code_ets,
-     external_fun,get_chunk,module_md5,make_stub,make_stub_many_funs,
-     constant_pools,false_dependency,coverage].
 
 new_binary_types(Config) when is_list(Config) ->
     ?line Data = ?config(data_dir, Config),
@@ -320,6 +340,9 @@ make_stub(Config) when is_list(Config) ->
 	(catch code:make_stub_module(my_code_test,
 				     bit_sized_binary(Code),
 				     {[],[]})),
+    ?line {'EXIT',{badarg,_}} =
+	(catch code:make_stub_module(my_code_test_with_wrong_name,
+				     Code, {[],[]})),
     ok.
 
 make_stub_many_funs(Config) when is_list(Config) ->
diff --git a/erts/emulator/test/crypto_SUITE.erl b/erts/emulator/test/crypto_SUITE.erl
index e3d34b923d..a8cc175303 100644
--- a/erts/emulator/test/crypto_SUITE.erl
+++ b/erts/emulator/test/crypto_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,14 +19,34 @@
 
 -module(crypto_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
 	 t_md5/1,t_md5_update/1,error/1,unaligned_context/1,random_lists/1,
 	 misc_errors/1]).
 
-all(suite) ->
-    [t_md5,t_md5_update,error,unaligned_context,random_lists,misc_errors].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [t_md5, t_md5_update, error, unaligned_context,
+     random_lists, misc_errors].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 
 misc_errors(doc) ->
diff --git a/erts/emulator/test/crypto_reference.erl b/erts/emulator/test/crypto_reference.erl
index 99107e3b57..b91535a50e 100644
--- a/erts/emulator/test/crypto_reference.erl
+++ b/erts/emulator/test/crypto_reference.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2008-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2008-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
diff --git a/erts/emulator/test/ddll_SUITE.erl b/erts/emulator/test/ddll_SUITE.erl
index 79047d7de5..ef607bf407 100644
--- a/erts/emulator/test/ddll_SUITE.erl
+++ b/erts/emulator/test/ddll_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -30,7 +30,8 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
 
--export([all/1, ddll_test/1, errors/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, ddll_test/1, errors/1,
 	 reference_count/1,
 	 kill_port/1, dont_kill_port/1]).
 -export([unload_on_process_exit/1, delayed_unload_with_ports/1, 
@@ -50,35 +51,39 @@
 
 -import(ordsets, [subtract/2]).
 
--include("test_server.hrl").
-
-all(suite) ->
-    [ddll_test, errors,
-     reference_count,
-     kill_port,
-     dont_kill_port,
-     properties,
-     load_and_unload,
-     unload_on_process_exit, 
-     delayed_unload_with_ports, 
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [ddll_test, errors, reference_count, kill_port,
+     dont_kill_port, properties, load_and_unload,
+     unload_on_process_exit, delayed_unload_with_ports,
      unload_due_to_process_exit,
-     no_unload_due_to_process_exit, 
-     no_unload_due_to_process_exit_2,
-     unload_reload_thingie, 
-     unload_reload_thingie_2,
-     unload_reload_thingie_3,
-     reload_pending,
-     load_fail_init,
-     reload_pending_fail_init,
-     reload_pending_kill,
-     more_error_codes, 
-     forced_port_killing, 
-     no_trap_exit_and_kill_ports,
-     monitor_demonitor, 
-     monitor_demonitor_load,
-     new_interface,
-     lock_driver
-    ].
+     no_unload_due_to_process_exit,
+     no_unload_due_to_process_exit_2, unload_reload_thingie,
+     unload_reload_thingie_2, unload_reload_thingie_3,
+     reload_pending, load_fail_init,
+     reload_pending_fail_init, reload_pending_kill,
+     more_error_codes, forced_port_killing,
+     no_trap_exit_and_kill_ports, monitor_demonitor,
+     monitor_demonitor_load, new_interface, lock_driver].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 unload_on_process_exit(suite) ->
     [];
diff --git a/erts/emulator/test/decode_packet_SUITE.erl b/erts/emulator/test/decode_packet_SUITE.erl
index d9e961be2f..97ab470a3e 100644
--- a/erts/emulator/test/decode_packet_SUITE.erl
+++ b/erts/emulator/test/decode_packet_SUITE.erl
@@ -21,14 +21,34 @@
 
 -module(decode_packet_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
 	 basic/1, packet_size/1, neg/1, http/1, line/1, ssl/1, otp_8536/1]).
 
-all(suite) ->
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
     [basic, packet_size, neg, http, line, ssl, otp_8536].
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Seed = {S1,S2,S3} = now(),
     random:seed(S1,S2,S3),
@@ -36,7 +56,7 @@ init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog=?t:timetrap(?t:minutes(1)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
diff --git a/erts/emulator/test/dgawd_handler.erl b/erts/emulator/test/dgawd_handler.erl
index 881354b9da..27085b7b7e 100644
--- a/erts/emulator/test/dgawd_handler.erl
+++ b/erts/emulator/test/dgawd_handler.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2006-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2006-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
diff --git a/erts/emulator/test/distribution_SUITE.erl b/erts/emulator/test/distribution_SUITE.erl
index 79252d0593..d62eb00919 100644
--- a/erts/emulator/test/distribution_SUITE.erl
+++ b/erts/emulator/test/distribution_SUITE.erl
@@ -22,30 +22,30 @@
 
 %% Tests distribution and the tcp driver.
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1,
-	 ping/1, bulk_send/1, bulk_send_small/1,
-	 bulk_send_big/1,
-	 bulk_send_bigbig/1,
-	 local_send/1, local_send_small/1, local_send_big/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 ping/1, bulk_send_small/1,
+	 bulk_send_big/1, bulk_send_bigbig/1,
+	 local_send_small/1, local_send_big/1,
 	 local_send_legal/1, link_to_busy/1, exit_to_busy/1,
 	 lost_exit/1, link_to_dead/1, link_to_dead_new_node/1,
 	 applied_monitor_node/1, ref_port_roundtrip/1, nil_roundtrip/1,
-	 trap_bif/1, trap_bif_1/1, trap_bif_2/1, trap_bif_3/1,
-	 stop_dist/1, dist_auto_connect/1, 
+	 trap_bif_1/1, trap_bif_2/1, trap_bif_3/1,
+	 stop_dist/1, 
 	 dist_auto_connect_never/1, dist_auto_connect_once/1,
 	 dist_parallel_send/1,
 	 atom_roundtrip/1,
 	 atom_roundtrip_r12b/1,
 	 contended_atom_cache_entry/1,
-	 bad_dist_ext/1,
+	 bad_dist_structure/1,
 	 bad_dist_ext_receive/1,
 	 bad_dist_ext_process_info/1,
 	 bad_dist_ext_control/1,
 	 bad_dist_ext_connection_id/1]).
 
--export([init_per_testcase/2, fin_per_testcase/2]).
+-export([init_per_testcase/2, end_per_testcase/2]).
 
 %% Internal exports.
 -export([sender/3, receiver2/2, dummy_waiter/0, dead_process/0,
@@ -54,15 +54,39 @@
 	 dist_evil_parallel_receiver/0,
          sendersender/4, sendersender2/4]).
 
-all(suite) -> [
-	       ping, bulk_send, local_send, link_to_busy, exit_to_busy,
-	       lost_exit, link_to_dead, link_to_dead_new_node,
-	       applied_monitor_node, ref_port_roundtrip, nil_roundtrip,
-	       stop_dist, trap_bif, dist_auto_connect, dist_parallel_send,
-	       atom_roundtrip, atom_roundtrip_r12b,
-	       contended_atom_cache_entry,
-	       bad_dist_ext
-	      ].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [ping, {group, bulk_send}, {group, local_send},
+     link_to_busy, exit_to_busy, lost_exit, link_to_dead,
+     link_to_dead_new_node, applied_monitor_node,
+     ref_port_roundtrip, nil_roundtrip, stop_dist,
+     {group, trap_bif}, {group, dist_auto_connect},
+     dist_parallel_send, atom_roundtrip, atom_roundtrip_r12b,
+     contended_atom_cache_entry, bad_dist_structure, {group, bad_dist_ext}].
+
+groups() -> 
+    [{bulk_send, [], [bulk_send_small, bulk_send_big, bulk_send_bigbig]},
+     {local_send, [],
+      [local_send_small, local_send_big, local_send_legal]},
+     {trap_bif, [], [trap_bif_1, trap_bif_2, trap_bif_3]},
+     {dist_auto_connect, [],
+      [dist_auto_connect_never, dist_auto_connect_once]},
+     {bad_dist_ext, [],
+      [bad_dist_ext_receive, bad_dist_ext_process_info,
+       bad_dist_ext_control, bad_dist_ext_connection_id]}].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
 -define(DEFAULT_TIMETRAP, 4*60*1000).
 
@@ -70,7 +94,7 @@ init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog=?t:timetrap(?DEFAULT_TIMETRAP),
     [{watchdog, Dog},{testcase, Func}|Config].
 
-fin_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
+end_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
@@ -118,13 +142,6 @@ ping(Config) when is_list(Config) ->
 
     ok.
 
-bulk_send(doc) ->
- ["Tests sending large amount of data to another node and measure",
-  "the time. This tests that a process that is suspended on a ",
-  "busy port will eventually be resumed."];
-bulk_send(suite) ->
-    [bulk_send_small, bulk_send_big, bulk_send_bigbig].
-
 bulk_send_small(Config) when is_list(Config) ->
     ?line bulk_send(64, 32).
 
@@ -174,7 +191,7 @@ bulk_sendsend2(Terms, BinSize, BusyBufSize) ->
     ?line {ok, NodeRecv} = start_node(bulk_receiver),
     ?line Recv = spawn(NodeRecv, erlang, apply, [fun receiver/2, [0, 0]]),
     ?line Bin = list_to_binary(lists:duplicate(BinSize*1024, 253)),
-    ?line Size = Terms*size(Bin),
+    %%?line Size = Terms*size(Bin),
 
     %% SLF LEFT OFF HERE.
     %% When the caller uses small hunks, like 4k via
@@ -187,7 +204,7 @@ bulk_sendsend2(Terms, BinSize, BusyBufSize) ->
 
     ?line {ok, NodeSend} = start_node(bulk_sender, "+zdbbl " ++ integer_to_list(BusyBufSize)),
     ?line _Send = spawn(NodeSend, erlang, apply, [fun sendersender/4, [self(), Recv, Bin, Terms]]),
-    ?line {Elapsed, {TermsN, SizeN}, MonitorCount} =
+    ?line {Elapsed, {_TermsN, SizeN}, MonitorCount} =
         receive {sendersender, BigRes} ->
                 BigRes
         end,
@@ -227,7 +244,7 @@ sendersender3(To, _Bin, 0, SendDone, MonitorCount) ->
             ok
     end,
     receive
-        {monitor, _Pid, _Type, _Info} = M ->
+        {monitor, _Pid, _Type, _Info} ->
             sendersender3(To, _Bin, 0, SendDone, MonitorCount + 1)
     after 0 ->
             if SendDone ->
@@ -255,17 +272,14 @@ receiver(Terms, Size) ->
     end.
 
 
-local_send(suite) ->
-    [local_send_small, local_send_big, local_send_legal];
-local_send(doc) ->
-    ["Tests sending small and big messages to a non-existing ",
-     "local registered process."].
 
 local_send_big(doc) ->
     ["Sends several big message to an non-registered process on ",
      "the local node."];
 local_send_big(Config) when is_list(Config) ->
-    Data0=local_send_big(doc)++local_send(doc),
+    Data0=local_send_big(doc)++
+	["Tests sending small and big messages to a non-existing ",
+        "local registered process."],
     Data1=[Data0,[Data0, Data0, [Data0], Data0],Data0],
     Data2=Data0++lists:flatten(Data1)++
 	list_to_binary(lists:flatten(Data1)),
@@ -522,7 +536,7 @@ sink1() ->
 
 lost_exit(doc) ->
     "Test that EXIT and DOWN messages send to another node are not lost if "
-	"if the distribution port is busy.";
+	"the distribution port is busy.";
 lost_exit(Config) when is_list(Config) ->
     ?line {ok, Node} = start_node(lost_exit),
 
@@ -751,9 +765,6 @@ stop_dist(Config) when is_list(Config) ->
 
     ok.
 
-trap_bif(doc) ->
-    ["Verifies that BIFs which are traps to Erlang work (OTP-2680)."];
-trap_bif(suite) -> [trap_bif_1, trap_bif_2, trap_bif_3].
 
 trap_bif_1(doc) ->
     [""];
@@ -790,10 +801,6 @@ tr3() ->
 
 
 
-dist_auto_connect(doc) ->
-    ["Tests the kernel parameter 'dist_auto_connect'."];
-dist_auto_connect(suite) ->
-    [dist_auto_connect_never, dist_auto_connect_once].
 
 % This has to be done by nodes with differrent cookies, otherwise global
 % will connect nodes, which is correct, but makes it hard to test.
@@ -1143,8 +1150,7 @@ contended_atom_cache_entry(Config) when is_list(Config) ->
     ?line {ok, SNode} = start_node(Config),
     ?line {ok, RNode} = start_node(Config),
     ?line Success = make_ref(),
-    ?line Mstr
-	= spawn_link(
+    ?line spawn_link(
 	    SNode,
 	    fun () ->
 		    erts_debug:set_internal_state(available_internal_state,
@@ -1201,13 +1207,13 @@ contended_atom_cache_entry(Config) when is_list(Config) ->
     ?line stop_node(RNode),
     ?line ok.
 
-send_ref_atom(To, Ref, Atom, 0) ->
+send_ref_atom(_To, _Ref, _Atom, 0) ->
     ok;
 send_ref_atom(To, Ref, Atom, N) ->
     To ! {Ref, Atom},
     send_ref_atom(To, Ref, Atom, N-1).
 
-receive_ref_atom(Ref, Atom, 0) ->
+receive_ref_atom(_Ref, _Atom, 0) ->
     ok;
 receive_ref_atom(Ref, Atom, N) ->
     receive
@@ -1242,7 +1248,7 @@ unwanted_cixs() ->
 	      nodes()).
     
     
-get_conflicting_atoms(CIX, 0) ->
+get_conflicting_atoms(_CIX, 0) ->
     [];
 get_conflicting_atoms(CIX, N) ->
     {A, B, C} = now(),
@@ -1256,13 +1262,187 @@ get_conflicting_atoms(CIX, N) ->
 	    get_conflicting_atoms(CIX, N)
     end.
 
+-define(COOKIE, '').
+-define(DOP_LINK,		1).
+-define(DOP_SEND,		2).
+-define(DOP_EXIT,		3).
+-define(DOP_UNLINK,		4).
+-define(DOP_REG_SEND,		6).
+-define(DOP_GROUP_LEADER,	7).
+-define(DOP_EXIT2,		8).
+
+-define(DOP_SEND_TT,		12).
+-define(DOP_EXIT_TT,		13).
+-define(DOP_REG_SEND_TT,	16).
+-define(DOP_EXIT2_TT,		18).
+
+-define(DOP_MONITOR_P,		19).
+-define(DOP_DEMONITOR_P,	20).
+-define(DOP_MONITOR_P_EXIT,	21).
+
+start_monitor(Offender,P) ->
+    ?line Parent = self(),
+    ?line Q = spawn(Offender,
+		    fun () -> 
+			    Ref = erlang:monitor(process,P),
+			    Parent ! {self(),ref,Ref},
+			    receive
+				just_stay_alive -> ok
+			    end
+		    end),
+    ?line Ref = receive
+		    {Q,ref,R} ->
+			R
+		after  5000 ->
+			error
+		end,
+    io:format("Ref is ~p~n",[Ref]),
+    ok.
+start_link(Offender,P) ->
+    ?line Parent = self(),
+    ?line Q = spawn(Offender,
+		    fun () ->
+			    process_flag(trap_exit,true),
+			    link(P),
+			    Parent ! {self(),ref,P},
+			    receive
+				just_stay_alive -> ok
+			    end
+		    end),
+    ?line Ref = receive
+		    {Q,ref,R} ->
+			R
+		after  5000 ->
+			error
+		end,
+    io:format("Ref is ~p~n",[Ref]),
+    ok.
+
+bad_dist_structure(suite) ->
+    [];
+bad_dist_structure(doc) ->
+    ["Test dist messages with valid structure (binary to term ok) but malformed"
+     "control content"];
+bad_dist_structure(Config) when is_list(Config) ->
+    %process_flag(trap_exit,true),
+    ODog = ?config(watchdog, Config),
+    ?t:timetrap_cancel(ODog),
+    Dog = ?t:timetrap(?t:seconds(15)),
+
+    ?line {ok, Offender} = start_node(bad_dist_structure_offender),
+    ?line {ok, Victim} = start_node(bad_dist_structure_victim),
+    ?line start_node_monitors([Offender,Victim]),
+    ?line Parent = self(),
+    ?line P = spawn(Victim,
+		    fun () ->
+			    process_flag(trap_exit,true),
+			    Parent ! {self(), started},
+			    receive check_msgs -> ok end,
+			    bad_dist_struct_check_msgs([one,
+							two]),
+			    Parent ! {self(), messages_checked},
+			    receive done -> ok end
+		    end),
+    ?line receive {P, started} -> ok end,
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line verify_up(Offender, Victim),
+    ?line true = lists:member(Offender, rpc:call(Victim, erlang, nodes, [])),
+    ?line start_monitor(Offender,P),
+    ?line P ! one,
+    ?line send_bad_structure(Offender, P,{?DOP_MONITOR_P_EXIT,'replace',P,normal},2),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line start_monitor(Offender,P),
+    ?line send_bad_structure(Offender, P,{?DOP_MONITOR_P_EXIT,'replace',P,normal,normal},2),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line start_link(Offender,P),
+    ?line send_bad_structure(Offender, P,{?DOP_LINK},0),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line start_link(Offender,P),
+    ?line send_bad_structure(Offender, P,{?DOP_UNLINK,'replace'},2),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line start_link(Offender,P),
+    ?line send_bad_structure(Offender, P,{?DOP_UNLINK,'replace',make_ref()},2),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line start_link(Offender,P),
+    ?line send_bad_structure(Offender, P,{?DOP_UNLINK,make_ref(),P},0),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line start_link(Offender,P),
+    ?line send_bad_structure(Offender, P,{?DOP_UNLINK,normal,normal},0),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line start_monitor(Offender,P),
+    ?line send_bad_structure(Offender, P,{?DOP_MONITOR_P,'replace',P},2),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line start_monitor(Offender,P),
+    ?line send_bad_structure(Offender, P,{?DOP_MONITOR_P,'replace',P,normal},2),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line start_monitor(Offender,P),
+    ?line send_bad_structure(Offender, P,{?DOP_DEMONITOR_P,'replace',P},2),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line start_monitor(Offender,P),
+    ?line send_bad_structure(Offender, P,{?DOP_DEMONITOR_P,'replace',P,normal},2),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_EXIT,'replace',P},2),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_EXIT,make_ref(),normal,normal},0),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_EXIT_TT,'replace',token,P},2),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_EXIT_TT,make_ref(),token,normal,normal},0),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_EXIT2,'replace',P},2),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_EXIT2,make_ref(),normal,normal},0),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_EXIT2_TT,'replace',token,P},2),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_EXIT2_TT,make_ref(),token,normal,normal},0),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_GROUP_LEADER,'replace'},2),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_GROUP_LEADER,'replace','atomic'},2),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_GROUP_LEADER,'replace',P},0),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_REG_SEND_TT,'replace','',name},2,{message}),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_REG_SEND_TT,'replace','',name,token},0,{message}),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_REG_SEND,'replace',''},2,{message}),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_REG_SEND,'replace','',P},0,{message}),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_REG_SEND,'replace','',name},0,{message}),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_REG_SEND,'replace','',name,{token}},2,{message}),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_SEND_TT,'',P},0,{message}),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_SEND_TT,'',name,token},0,{message}),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_SEND,''},0,{message}),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_SEND,'',name},0,{message}),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line send_bad_structure(Offender, P,{?DOP_SEND,'',P,{token}},0,{message}),
+    ?line pong = rpc:call(Victim, net_adm, ping, [Offender]),
+    ?line P ! two,
+    ?line P ! check_msgs,
+    ?line receive 
+	      {P, messages_checked} -> ok 
+	  after 5000 ->
+		  exit(victim_is_dead)
+	  end,
+
+    ?line {message_queue_len, 0}
+	= rpc:call(Victim, erlang, process_info, [P, message_queue_len]),
+    
+    ?line unlink(P),
+    ?line P ! done,
+    ?line stop_node(Offender),
+    ?line stop_node(Victim),
+    ?t:timetrap_cancel(Dog),
+    ok.
 
-bad_dist_ext(doc) -> [];
-bad_dist_ext(suite) ->
-    [bad_dist_ext_receive,
-     bad_dist_ext_process_info,
-     bad_dist_ext_control,
-     bad_dist_ext_connection_id].
 
 
 bad_dist_ext_receive(Config) when is_list(Config) ->
@@ -1483,6 +1663,22 @@ bad_dist_ext_connection_id(Config) when is_list(Config) ->
     ?line stop_node(Victim).
 
 
+bad_dist_struct_check_msgs([]) ->
+    receive
+	Msg ->
+	    exit({unexpected_message, Msg})
+    after 0 ->
+	    ok
+    end;
+bad_dist_struct_check_msgs([M|Ms]) ->
+    receive
+	{'EXIT',_,_} = EM ->
+	    io:format("Ignoring exit message: ~p~n",[EM]),
+	    bad_dist_struct_check_msgs([M|Ms]);
+	Msg ->
+	    M = Msg,
+	    bad_dist_struct_check_msgs(Ms)
+    end.
 bad_dist_ext_check_msgs([]) ->
     receive
 	Msg ->
@@ -1497,24 +1693,6 @@ bad_dist_ext_check_msgs([M|Ms]) ->
 	    bad_dist_ext_check_msgs(Ms)
     end.
     
--define(COOKIE, '').
--define(DOP_LINK,		1).
--define(DOP_SEND,		2).
--define(DOP_EXIT,		3).
--define(DOP_UNLINK,		4).
--define(DOP_NODE_LINK,		5).
--define(DOP_REG_SEND,		6).
--define(DOP_GROUP_LEADER,	7).
--define(DOP_EXIT2,		8).
-
--define(DOP_SEND_TT,		12).
--define(DOP_EXIT_TT,		13).
--define(DOP_REG_SEND_TT,	16).
--define(DOP_EXIT2_TT,		18).
-
--define(DOP_MONITOR_P,		19).
--define(DOP_DEMONITOR_P,	20).
--define(DOP_MONITOR_P_EXIT,	21).
 
 dport_reg_send(Node, Name, Msg) ->
     DPrt = case dport(Node) of
@@ -1546,6 +1724,39 @@ dport_send(To, Msg) ->
 				  ?COOKIE,
 				  To}),
 			dmsg_ext(Msg)]).
+send_bad_structure(Offender,Victim,Bad,WhereToPutSelf) ->
+    send_bad_structure(Offender,Victim,Bad,WhereToPutSelf,[]).
+send_bad_structure(Offender,Victim,Bad,WhereToPutSelf,PayLoad) ->
+    Parent = self(),
+    Done = make_ref(),
+    spawn(Offender,
+	  fun () ->
+		  Node = node(Victim),
+		  pong = net_adm:ping(Node),
+		  DPrt = dport(Node),
+		  Bad1 = case WhereToPutSelf of
+			     0 -> 
+				 Bad;
+			     N when N > 0 ->
+				 setelement(N,Bad,self())
+			 end,
+		  DData = [dmsg_hdr(),
+			   dmsg_ext(Bad1)] ++
+		      case PayLoad of
+			  [] -> [];
+			  _Other -> [dmsg_ext(PayLoad)]
+		      end,
+		  port_command(DPrt, DData),
+		  Parent ! {DData,Done}
+	  end),
+    receive 
+	{WhatSent,Done} -> 
+	    io:format("Offender sent ~p~n",[WhatSent]),
+	    ok
+    after 5000 ->
+	    exit(unable_to_send)
+    end.
+   
 
 %% send_bad_msgs():
 %% Send a valid distribution header and control message
@@ -1629,10 +1840,10 @@ dmsg_bad_hdr() ->
      255].  % 255 atom references
     
 
-dmsg_fake_hdr1() ->
-    A = <<"fake header atom 1">>,
-    [131, % Version Magic
-     $D, 1, 16#8, 0, size(A), A]. % Fake header
+%% dmsg_fake_hdr1() ->
+%%     A = <<"fake header atom 1">>,
+%%     [131, % Version Magic
+%%      $D, 1, 16#8, 0, size(A), A]. % Fake header
 
 dmsg_fake_hdr2() ->
     A1 = <<"fake header atom 1">>,
@@ -1817,7 +2028,7 @@ flush_node_changes() ->
 
 node_monitor_loop(Master) ->
     receive
-	{nodeup, Node, InfoList} = Msg ->
+	{nodeup, Node, _InfoList} = Msg ->
 	    Master ! {nodeup, node(), Node},
 	    ?t:format("~p ~p: ~p~n", [node(), erlang:now(), Msg]),
 	    node_monitor_loop(Master);
@@ -1854,9 +2065,9 @@ verify_no_down(A, B) ->
 	    ok
     end.
 
-verify_down(A, B) ->
-    receive {nodedown, A, B, _} -> ok end,
-    receive {nodedown, B, A, _} -> ok end.
+%% verify_down(A, B) ->
+%%     receive {nodedown, A, B, _} -> ok end,
+%%     receive {nodedown, B, A, _} -> ok end.
 
 verify_down(A, ReasonA, B, ReasonB) ->
     receive
@@ -1876,11 +2087,11 @@ from(H, [H | T]) -> T;
 from(H, [_ | T]) -> from(H, T);
 from(_, []) -> [].
 
-fun_spawn(Fun) ->
-    fun_spawn(Fun, []).
+%% fun_spawn(Fun) ->
+%%     fun_spawn(Fun, []).
 
-fun_spawn(Fun, Args) ->
-    spawn_link(erlang, apply, [Fun, Args]).
+%% fun_spawn(Fun, Args) ->
+%%     spawn_link(erlang, apply, [Fun, Args]).
 
 
 long_or_short() -> 
diff --git a/erts/emulator/test/driver_SUITE.erl b/erts/emulator/test/driver_SUITE.erl
index 39b2ed395f..7600a44988 100644
--- a/erts/emulator/test/driver_SUITE.erl
+++ b/erts/emulator/test/driver_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2011. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -27,12 +27,12 @@
 %%% - queueing
 
 -module(driver_SUITE).
--export([all/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, 
+	 end_per_suite/1, init_per_group/2,end_per_group/2,
 	 init_per_testcase/2,
-	 fin_per_testcase/2,
-	 end_per_suite/1,
+	 end_per_testcase/2,
 	 outputv_echo/1,
-	 timer/1,
+	
 	 timer_measure/1,
 	 timer_cancel/1,
 	 timer_change/1,
@@ -51,7 +51,7 @@
 	 'driver_system_info_ver1.1'/1,
 	 driver_system_info_current_ver/1,
 	 driver_monitor/1,
-	 ioq_exit/1,
+	
 	 ioq_exit_ready_input/1,
 	 ioq_exit_ready_output/1,
 	 ioq_exit_timeout/1,
@@ -78,7 +78,7 @@
 
 -export([bin_prefix/2]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 
 % First byte in communication with the timer driver
@@ -120,49 +120,51 @@ init_per_testcase(Case, Config) when is_atom(Case), is_list(Config) ->
     ?line 0 = erts_debug:get_internal_state(check_io_debug),
     [{watchdog, Dog},{testcase, Case}|Config].
 
-fin_per_testcase(Case, Config) ->
+end_per_testcase(Case, Config) ->
     Dog = ?config(watchdog, Config),
-    erlang:display({fin_per_testcase, Case}),
+    erlang:display({end_per_testcase, Case}),
     ?line 0 = erts_debug:get_internal_state(check_io_debug),
     ?t:timetrap_cancel(Dog).
 
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [fun_to_port, outputv_echo, queue_echo, {group, timer},
+     driver_unloaded, io_ready_exit, use_fallback_pollset,
+     bad_fd_in_pollset, driver_event, fd_change,
+     steal_control, otp_6602, 'driver_system_info_ver1.0',
+     'driver_system_info_ver1.1',
+     driver_system_info_current_ver, driver_monitor,
+     {group, ioq_exit}, zero_extended_marker_garb_drv,
+     invalid_extended_marker_drv, larger_major_vsn_drv,
+     larger_minor_vsn_drv, smaller_major_vsn_drv,
+     smaller_minor_vsn_drv, peek_non_existing_queue,
+     otp_6879, caller, many_events, missing_callbacks,
+     smp_select, driver_select_use,
+     thread_mseg_alloc_cache_clean].
+
+groups() -> 
+    [{timer, [],
+      [timer_measure, timer_cancel, timer_delay,
+       timer_change]},
+     {ioq_exit, [],
+      [ioq_exit_ready_input, ioq_exit_ready_output,
+       ioq_exit_timeout, ioq_exit_ready_async, ioq_exit_event,
+       ioq_exit_ready_input_async, ioq_exit_ready_output_async,
+       ioq_exit_timeout_async, ioq_exit_event_async]}].
+
+init_per_suite(Config) ->
+    Config.
+
 end_per_suite(_Config) ->
     catch erts_debug:set_internal_state(available_internal_state, false).
 
-all(suite) ->
-    [
-     fun_to_port,
-     outputv_echo,
-     queue_echo,
-     timer,
-     driver_unloaded,
-     io_ready_exit,
-     use_fallback_pollset,
-     bad_fd_in_pollset,
-     driver_event,
-     fd_change,
-     steal_control,
-     otp_6602,
-     'driver_system_info_ver1.0',
-     'driver_system_info_ver1.1',
-     driver_system_info_current_ver,
-     driver_monitor,
-     ioq_exit,
-     zero_extended_marker_garb_drv,
-     invalid_extended_marker_drv,
-     larger_major_vsn_drv,
-     larger_minor_vsn_drv,
-     smaller_major_vsn_drv,
-     smaller_minor_vsn_drv,
-     peek_non_existing_queue,
-     otp_6879,
-     caller,
-     many_events,
-     missing_callbacks,
-     smp_select,
-     driver_select_use,
-     thread_mseg_alloc_cache_clean
-    ].
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 fun_to_port(doc) -> "Test sending a fun to port with an outputv-capable driver.";
 fun_to_port(Config) when is_list(Config) ->
@@ -308,7 +310,6 @@ compare(Got, Expected) ->
 %% 		Driver timer test suites
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
-timer(suite) -> [timer_measure,timer_cancel,timer_delay,timer_change].
 
 timer_measure(doc) -> ["Check that timers time out in good time."];
 timer_measure(Config) when is_list(Config) ->
@@ -1299,17 +1300,6 @@ driver_monitor(Config) when is_list(Config) ->
     ?line stop_driver(Port, Name),
     ?line ok.
 
-ioq_exit(doc) -> [];
-ioq_exit(suite) ->
-    [ioq_exit_ready_input,
-     ioq_exit_ready_output,
-     ioq_exit_timeout,
-     ioq_exit_ready_async,
-     ioq_exit_event,
-     ioq_exit_ready_input_async,
-     ioq_exit_ready_output_async,
-     ioq_exit_timeout_async,
-     ioq_exit_event_async].
 
 -define(IOQ_EXIT_READY_INPUT, 1).
 -define(IOQ_EXIT_READY_OUTPUT, 2).
@@ -1682,7 +1672,7 @@ smp_select0(Config) ->
     ProcFun = fun()-> io:format("Worker ~p starting\n",[self()]),	
 		      ?line Port = open_port({spawn, DrvName}, []),
 		      smp_select_loop(Port, 100000),
-		      sleep(500), % wait for driver to handle pending events
+		      sleep(1000), % wait for driver to handle pending events
 		      ?line true = erlang:port_close(Port),
 		      Master ! {ok,self()},
 		      io:format("Worker ~p finished\n",[self()])
@@ -1790,8 +1780,8 @@ mseg_alloc_ccc() ->
     mseg_alloc_ccc(erlang:system_info({allocator,mseg_alloc})).
 
 mseg_alloc_ccc(MsegAllocInfo) ->
-    ?line {value,{calls, CL}}
-	= lists:keysearch(calls, 1, MsegAllocInfo),
+    ?line {value,{memkind, MKL}} = lists:keysearch(memkind,1,MsegAllocInfo),
+    ?line {value,{calls, CL}} = lists:keysearch(calls, 1, MKL),
     ?line {value,{mseg_check_cache, GigaCCC, CCC}}
 	= lists:keysearch(mseg_check_cache, 1, CL),
     ?line GigaCCC*1000000000 + CCC.
@@ -1800,12 +1790,28 @@ mseg_alloc_cached_segments() ->
     mseg_alloc_cached_segments(erlang:system_info({allocator,mseg_alloc})).
 
 mseg_alloc_cached_segments(MsegAllocInfo) ->
+    MemName = case is_halfword_vm() of
+	true -> "high memory";
+	false -> "all memory"
+    end,
+    ?line [{memkind,DrvMem}]
+	= lists:filter(fun(E) -> case E of
+				    {memkind, [{name, MemName} | _]} -> true;
+				    _ -> false
+		       end end, MsegAllocInfo),
     ?line {value,{status, SL}}
-	= lists:keysearch(status, 1, MsegAllocInfo),
+	= lists:keysearch(status, 1, DrvMem),
     ?line {value,{cached_segments, CS}}
 	= lists:keysearch(cached_segments, 1, SL),
     ?line CS.
 
+is_halfword_vm() ->
+    case {erlang:system_info({wordsize, internal}),
+	  erlang:system_info({wordsize, external})} of
+	{4, 8} -> true;
+	{WS, WS} -> false
+    end.
+
 driver_alloc_sbct() ->
     {_, _, _, As} = erlang:system_info(allocator),
     case lists:keysearch(driver_alloc, 1, As) of
diff --git a/erts/emulator/test/driver_SUITE_data/chkio_drv.c b/erts/emulator/test/driver_SUITE_data/chkio_drv.c
index b571cb30e6..bbdb09cfcb 100644
--- a/erts/emulator/test/driver_SUITE_data/chkio_drv.c
+++ b/erts/emulator/test/driver_SUITE_data/chkio_drv.c
@@ -102,6 +102,7 @@ typedef struct chkio_smp_select {
     int write_fd;
     int next_read;
     int next_write;
+    int first_write;
     enum {Closed, Opened, Selected, Waiting} state;
     int wasSelected;
     unsigned rand_state;
@@ -577,9 +578,16 @@ chkio_drv_ready_input(ErlDrvData drv_data, ErlDrvEvent event)
 	inPipe = (pip->next_write - pip->next_read);
 	if (inPipe == 0) {
 	    bytes = read(pip->read_fd, &word, sizeof(word));
-	    printf("Unexpected empty pipe, expected %u -> %u, bytes=%d, word=%d\n",
-		   pip->next_read, pip->next_write-1, bytes, word);
-	    abort();
+	    printf("Unexpected empty pipe, expected %u -> %u, bytes=%d, word=%d, written=%d\n",
+		   pip->next_read, pip->next_write-1, bytes, word,
+		   (pip->next_write - pip->first_write));
+	    /*abort();
+    	      Allow unexpected events as it's been seen to be triggered by epoll
+	      on Linux. Most of the time the unwanted events are filtered by
+	      the erl_check_io layer. But when fd's are reused the events may
+	      slip up to the driver.
+	    */
+	    break; 
 	}
 
 	n = rand_r(&pip->rand_state) % (inPipe*4);
@@ -1252,6 +1260,7 @@ chkio_drv_control(ErlDrvData drv_data,
 		pip->state = Opened;
 		pip->wasSelected = 0;
 		pip->next_write = pip->next_read = rand_r(&pip->rand_state) % 1024;
+		pip->first_write = pip->next_write;
 		if (op & 1) break;
 		op >>= 1;
 	    }/*fall through*/
diff --git a/erts/emulator/test/efile_SUITE.erl b/erts/emulator/test/efile_SUITE.erl
index 1d66b6ef70..0cac0636e0 100644
--- a/erts/emulator/test/efile_SUITE.erl
+++ b/erts/emulator/test/efile_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -17,12 +17,32 @@
 %% %CopyrightEnd%
 
 -module(efile_SUITE).
--export([all/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2]).
 -export([iter_max_files/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [iter_max_files].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) -> [iter_max_files].
 
 %%
 %% Open as many files as possible. Do this several times and check 
diff --git a/erts/emulator/test/emulator.spec b/erts/emulator/test/emulator.spec
index ed5bd48e84..1ea751cc3b 100644
--- a/erts/emulator/test/emulator.spec
+++ b/erts/emulator/test/emulator.spec
@@ -1 +1 @@
-{topcase, {dir, "../emulator_test"}}.
+{suites,"../emulator_test",all}.
diff --git a/erts/emulator/test/erl_drv_thread_SUITE.erl b/erts/emulator/test/erl_drv_thread_SUITE.erl
index ea618e9feb..bc9e610af3 100644
--- a/erts/emulator/test/erl_drv_thread_SUITE.erl
+++ b/erts/emulator/test/erl_drv_thread_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2007-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2007-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,18 +19,36 @@
 
 -module(erl_drv_thread_SUITE).
 -author('[email protected]').
--export([all/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2]).
 
 -export([basic/1, rwlock/1, tsd/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 -define(DEFAULT_TIMETRAP_SECS, 240).
 
-all(doc) -> [];
-all(suite) ->
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
     [basic, rwlock, tsd].
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %%                                                                        %%
 %% Testcases                                                              %%
diff --git a/erts/emulator/test/erl_link_SUITE.erl b/erts/emulator/test/erl_link_SUITE.erl
index 542c8dffbe..84d17c9596 100644
--- a/erts/emulator/test/erl_link_SUITE.erl
+++ b/erts/emulator/test/erl_link_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2001-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2001-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -28,9 +28,10 @@
 -author('[email protected]').
 
 %-define(line_trace, 1).
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2]).
 
 % Test cases
 -export([links/1,
@@ -46,7 +47,7 @@
 	 otp_5772_dist_monitor/1,
 	 otp_7946/1]).
 
--export([init_per_testcase/2, fin_per_testcase/2, end_per_suite/1]).
+-export([init_per_testcase/2, end_per_testcase/2]).
 
 % Internal exports
 -export([test_proc/0]).
@@ -77,11 +78,29 @@
 
 
 
-all(suite) -> [links, dist_links, monitor_nodes, process_monitors,
-	       dist_process_monitors, busy_dist_port_monitor,
-	       busy_dist_port_link, otp_5772_link, otp_5772_dist_link,
-	       otp_5772_monitor, otp_5772_dist_monitor,
-	       otp_7946].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [links, dist_links, monitor_nodes, process_monitors,
+     dist_process_monitors, busy_dist_port_monitor,
+     busy_dist_port_link, otp_5772_link, otp_5772_dist_link,
+     otp_5772_monitor, otp_5772_dist_monitor, otp_7946].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    catch erts_debug:set_internal_state(available_internal_state, false).
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 links(doc) -> ["Tests node local links"];
 links(suite) -> [];
@@ -678,13 +697,10 @@ init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     end,
     ?line [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     ?line Dog = ?config(watchdog, Config),
     ?line ?t:timetrap_cancel(Dog).
 
-end_per_suite(_Config) ->
-    catch erts_debug:set_internal_state(available_internal_state, false).
-
 tp_call(Tp, Fun) ->
     ?line R = make_ref(),
     ?line Tp ! {call, self(), R, Fun},
@@ -1050,7 +1066,6 @@ stop_node(Node) ->
 -define(DOP_SEND,		2).
 -define(DOP_EXIT,		3).
 -define(DOP_UNLINK,		4).
--define(DOP_NODE_LINK,		5).
 -define(DOP_REG_SEND,		6).
 -define(DOP_GROUP_LEADER,	7).
 -define(DOP_EXIT2,		8).
diff --git a/erts/emulator/test/erts_debug_SUITE.erl b/erts/emulator/test/erts_debug_SUITE.erl
index e60a999df1..9a6a6f4c05 100644
--- a/erts/emulator/test/erts_debug_SUITE.erl
+++ b/erts/emulator/test/erts_debug_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2005-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2005-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -18,19 +18,40 @@
 %%
 
 -module(erts_debug_SUITE).
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,
-	 flat_size/1,flat_size_big/1,df/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
+	 flat_size/1,flat_size_big/1,df/1,
+	 instructions/1]).
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [flat_size, flat_size_big, df, instructions].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) ->
-    [flat_size,flat_size_big,df].
 
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog=?t:timetrap(?t:minutes(2)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
@@ -70,3 +91,8 @@ df(Config) when is_list(Config) ->
 
 pps() ->
     {erlang:ports()}.
+
+instructions(Config) when is_list(Config) ->
+    ?line Is = erts_debug:instructions(),
+    ?line _ = [list_to_atom(I) || I <- Is],
+    ok.
diff --git a/erts/emulator/test/estone_SUITE.erl b/erts/emulator/test/estone_SUITE.erl
index 7fb92faf0d..a4cb76dde1 100644
--- a/erts/emulator/test/estone_SUITE.erl
+++ b/erts/emulator/test/estone_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2002-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2002-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -18,8 +18,9 @@
 
 -module(estone_SUITE).
 %% Test functions
--export([all/1,estone/1]).
--export([init_per_testcase/2, fin_per_testcase/2]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,estone/1]).
+-export([init_per_testcase/2, end_per_testcase/2]).
 
 %% Internal exports for EStone tests
 -export([lists/1,
@@ -44,7 +45,7 @@
 	 run_micro/3,p1/1,ppp/3,macro/2,micros/0]).
 
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 %% Test suite defines
 -define(default_timeout, ?t:minutes(10)).
@@ -68,12 +69,31 @@
 init_per_testcase(_Case, Config) ->
     ?line Dog=test_server:timetrap(?default_timeout),
     [{watchdog, Dog}|Config].
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog),
     ok.
 
-all(suite) -> [estone].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [estone].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 estone(suite) ->
     [];
diff --git a/erts/emulator/test/evil_SUITE.erl b/erts/emulator/test/evil_SUITE.erl
index a8288584f4..5c59184fe2 100644
--- a/erts/emulator/test/evil_SUITE.erl
+++ b/erts/emulator/test/evil_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2002-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2002-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -18,7 +18,9 @@
 
 -module(evil_SUITE).
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
 	 heap_frag/1,
 	 encode_decode_ext/1,
 	 decode_integer_ext/1,
@@ -30,26 +32,37 @@
 	 decode_pos_neg_zero/1
 	]).
 
--include("test_server.hrl").
-
-all(suite) ->
-    [
-     heap_frag,
-     encode_decode_ext,
-     decode_integer_ext,
-     decode_small_big_ext,
-     decode_large_big_ext,
-     decode_small_big_ext_neg,
-     decode_large_big_ext_neg,
-     decode_too_small,
-     decode_pos_neg_zero
-    ].
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [heap_frag, encode_decode_ext, decode_integer_ext,
+     decode_small_big_ext, decode_large_big_ext,
+     decode_small_big_ext_neg, decode_large_big_ext_neg,
+     decode_too_small, decode_pos_neg_zero].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 init_per_testcase(_Case, Config) ->
     ?line Dog = test_server:timetrap(?t:minutes(0.5)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     Dog=?config(watchdog, Config),
     test_server:timetrap_cancel(Dog),
     ok.
diff --git a/erts/emulator/test/exception_SUITE.erl b/erts/emulator/test/exception_SUITE.erl
index f1e6e004ad..7041ad32de 100644
--- a/erts/emulator/test/exception_SUITE.erl
+++ b/erts/emulator/test/exception_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,20 +19,40 @@
 
 -module(exception_SUITE).
 
--export([all/1, badmatch/1, pending_errors/1, nil_arith/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 badmatch/1, pending_errors/1, nil_arith/1,
          stacktrace/1, nested_stacktrace/1, raise/1, gunilla/1, per/1,
 	 exception_with_heap_frag/1]).
 
 -export([bad_guy/2]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 -import(lists, [foreach/2]).
 
-all(suite) ->
-    [badmatch, pending_errors, nil_arith, 
-     stacktrace, nested_stacktrace, raise, gunilla, per,
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [badmatch, pending_errors, nil_arith, stacktrace,
+     nested_stacktrace, raise, gunilla, per,
      exception_with_heap_frag].
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 -define(try_match(E),
 	catch ?MODULE:bar(),
 	{'EXIT', {{badmatch, nomatch}, _}} = (catch E = id(nomatch))).
diff --git a/erts/emulator/test/float_SUITE.erl b/erts/emulator/test/float_SUITE.erl
index 99e9457985..c79a1d9900 100644
--- a/erts/emulator/test/float_SUITE.erl
+++ b/erts/emulator/test/float_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,9 +19,11 @@
 
 -module(float_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
 	 fpe/1,fp_drv/1,fp_drv_thread/1,denormalized/1,match/1,
 	 bad_float_unpack/1]).
 -export([otp_7178/1]).
@@ -31,18 +33,31 @@ init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog = ?t:timetrap(?t:minutes(3)),
     [{watchdog, Dog},{testcase,Func}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
-all(suite) ->
-    [fpe,
-     fp_drv,
-     fp_drv_thread,
-     otp_7178,
-     denormalized,
-     match,
-     bad_float_unpack].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [fpe, fp_drv, fp_drv_thread, otp_7178, denormalized,
+     match, bad_float_unpack].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 %%
 %% OTP-7178, list_to_float on very small numbers should give 0.0
diff --git a/erts/emulator/test/fun_SUITE.erl b/erts/emulator/test/fun_SUITE.erl
index a7889dfe90..4b59bfd6a5 100644
--- a/erts/emulator/test/fun_SUITE.erl
+++ b/erts/emulator/test/fun_SUITE.erl
@@ -22,7 +22,9 @@
 
 -define(default_timeout, ?t:minutes(1)).
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
 	 bad_apply/1,bad_fun_call/1,badarity/1,ext_badarity/1,
 	 equality/1,ordering/1,
 	 fun_to_port/1,t_hash/1,t_phash/1,t_phash2/1,md5/1,
@@ -32,19 +34,37 @@
 
 -export([nothing/0]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [bad_apply, bad_fun_call, badarity, ext_badarity,
+     equality, ordering, fun_to_port, t_hash, t_phash,
+     t_phash2, md5, refc, refc_ets, refc_dist,
+     const_propagation, t_arity, t_is_function2, t_fun_info].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) ->
-    [bad_apply,bad_fun_call,badarity,ext_badarity,equality,ordering,
-     fun_to_port,t_hash,t_phash,t_phash2,md5,
-     refc,refc_ets,refc_dist,const_propagation,
-     t_arity,t_is_function2,t_fun_info].
 
 init_per_testcase(_Case, Config) ->
     ?line Dog = test_server:timetrap(?default_timeout),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     Dog=?config(watchdog, Config),
     test_server:timetrap_cancel(Dog),
     ok.
diff --git a/erts/emulator/test/fun_r12_SUITE.erl b/erts/emulator/test/fun_r12_SUITE.erl
index 9262731dcb..9421b60f49 100644
--- a/erts/emulator/test/fun_r12_SUITE.erl
+++ b/erts/emulator/test/fun_r12_SUITE.erl
@@ -20,18 +20,39 @@
 -module(fun_r12_SUITE).
 -compile(r12).
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,dist_old_release/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,dist_old_release/1]).
 
 -define(default_timeout, ?t:minutes(1)).
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [dist_old_release].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) -> [dist_old_release].
 
 init_per_testcase(_Case, Config) ->
     ?line Dog = test_server:timetrap(?default_timeout),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     Dog=?config(watchdog, Config),
     test_server:timetrap_cancel(Dog),
     ok.
diff --git a/erts/emulator/test/gc_SUITE.erl b/erts/emulator/test/gc_SUITE.erl
index 066aa215b2..9ce8d18346 100644
--- a/erts/emulator/test/gc_SUITE.erl
+++ b/erts/emulator/test/gc_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -21,15 +21,34 @@
 
 -module(gc_SUITE).
 
--include("test_server.hrl").
--export([all/1]).
+-include_lib("test_server/include/test_server.hrl").
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2]).
 
 -define(default_timeout, ?t:minutes(10)).
 
 -export([grow_heap/1, grow_stack/1, grow_stack_heap/1]).
 
-all(suite) ->
-    [grow_heap,grow_stack, grow_stack_heap].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [grow_heap, grow_stack, grow_stack_heap].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 grow_heap(doc) -> ["Produce a growing list of elements, ",
 		   "for X calls, then drop one item per call",
diff --git a/erts/emulator/test/guard_SUITE.erl b/erts/emulator/test/guard_SUITE.erl
index 8fef36dfaf..a3be387a5b 100644
--- a/erts/emulator/test/guard_SUITE.erl
+++ b/erts/emulator/test/guard_SUITE.erl
@@ -19,16 +19,37 @@
 
 -module(guard_SUITE).
 
--export([all/1, bad_arith/1, bad_tuple/1, test_heap_guards/1, guard_bifs/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, bad_arith/1, bad_tuple/1, 
+	 test_heap_guards/1, guard_bifs/1,
 	 type_tests/1,guard_bif_binary_part/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 -export([init/3]).
 -import(lists, [member/2]).
 
-all(suite) -> [bad_arith, bad_tuple, test_heap_guards, guard_bifs,
-	       type_tests, guard_bif_binary_part].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [bad_arith, bad_tuple, test_heap_guards, guard_bifs,
+     type_tests, guard_bif_binary_part].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 bad_arith(doc) -> "Test that a bad arithmetic operation in a guard works correctly.";
 bad_arith(Config) when is_list(Config) ->
diff --git a/erts/emulator/test/hash_SUITE.erl b/erts/emulator/test/hash_SUITE.erl
index f5d1871bfb..257bee0b78 100644
--- a/erts/emulator/test/hash_SUITE.erl
+++ b/erts/emulator/test/hash_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2000-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2000-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -49,7 +49,7 @@
 -define(config(A,B),config(A,B)).
 -export([config/2]).
 -else.
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 -endif.
 
 -ifdef(debug).
@@ -69,22 +69,40 @@ config(priv_dir,_) ->
     ".".
 -else.
 %% When run in test server.
--export([all/1,test_basic/1,test_cmp/1,test_range/1,test_spread/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 test_basic/1,test_cmp/1,test_range/1,test_spread/1,
 	 test_phash2/1,otp_5292/1,bit_level_binaries/1,otp_7127/1,
-	 fin_per_testcase/2,init_per_testcase/2]).
+	 end_per_testcase/2,init_per_testcase/2]).
 init_per_testcase(_Case, Config) ->
     ?line Dog=test_server:timetrap(test_server:minutes(10)),
     [{watchdog, Dog}|Config].
  
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     Dog=?config(watchdog, Config),
     test_server:timetrap_cancel(Dog),
     ok.
-all(doc) ->
-    ["Test erlang:phash"];
-all(suite) ->
-    [test_basic, test_cmp, test_range, test_spread, test_phash2, otp_5292,
-     bit_level_binaries, otp_7127].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [test_basic, test_cmp, test_range, test_spread,
+     test_phash2, otp_5292, bit_level_binaries, otp_7127].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 test_basic(suite) ->
     [];
diff --git a/erts/emulator/test/hibernate_SUITE.erl b/erts/emulator/test/hibernate_SUITE.erl
index 4d36076d12..b8dc87db7f 100644
--- a/erts/emulator/test/hibernate_SUITE.erl
+++ b/erts/emulator/test/hibernate_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2003-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2003-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,23 +19,44 @@
 
 -module(hibernate_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
 	 basic/1,min_heap_size/1,bad_args/1,
 	 messages_in_queue/1,undefined_mfa/1, no_heap/1]).
 
 %% Used by test cases.
 -export([basic_hibernator/1,messages_in_queue_restart/2, no_heap_loop/0]).
 
-all(suite) ->
-    [basic,min_heap_size,bad_args,messages_in_queue,undefined_mfa,no_heap].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [basic, min_heap_size, bad_args, messages_in_queue,
+     undefined_mfa, no_heap].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog = ?t:timetrap(?t:minutes(3)),
     [{watchdog,Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
diff --git a/erts/emulator/test/ignore_cores.erl b/erts/emulator/test/ignore_cores.erl
index 1d738cbafd..8b1ac0fe6c 120000..100644
--- a/erts/emulator/test/ignore_cores.erl
+++ b/erts/emulator/test/ignore_cores.erl
@@ -1 +1,158 @@
-../../test/ignore_cores.erl
\ No newline at end of file
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2008-2010. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+%%%-------------------------------------------------------------------
+%%% File    : ignore_cores.erl
+%%% Author  : Rickard Green <[email protected]>
+%%% Description : 
+%%%
+%%% Created : 11 Feb 2008 by Rickard Green <[email protected]>
+%%%-------------------------------------------------------------------
+
+-module(ignore_cores).
+
+-include_lib("test_server/include/test_server.hrl").
+
+-export([init/1, fini/1, setup/3, setup/4, restore/1, dir/1]).
+
+-record(ignore_cores, {org_cwd,
+		       org_path,
+		       org_pwd_env,
+		       ign_dir = false,
+		       cores_dir = false}).
+
+%%
+%% Takes a testcase config
+%%
+
+init(Config) ->
+    {ok, OrgCWD} = file:get_cwd(),
+    [{ignore_cores,
+      #ignore_cores{org_cwd = OrgCWD,
+		    org_path = code:get_path(),
+		    org_pwd_env = os:getenv("PWD")}}
+     | lists:keydelete(ignore_cores, 1, Config)].
+    
+fini(Config) ->
+    #ignore_cores{org_cwd = OrgCWD,
+		  org_path = OrgPath,
+		  org_pwd_env = OrgPWD} = ?config(ignore_cores, Config),
+    ok = file:set_cwd(OrgCWD),
+    true = code:set_path(OrgPath),
+    case OrgPWD of
+	false -> ok;
+	_ -> true = os:putenv("PWD", OrgPWD)
+    end,
+    lists:keydelete(ignore_cores, 1, Config).
+
+setup(Suite, Testcase, Config) ->
+    setup(Suite, Testcase, Config, false).
+
+setup(Suite, Testcase, Config, SetCwd) when is_atom(Suite), 
+                                            is_atom(Testcase),
+                                            is_list(Config) ->
+    #ignore_cores{org_cwd = OrgCWD,
+		  org_path = OrgPath,
+		  org_pwd_env = OrgPWD} = ?config(ignore_cores, Config),
+    Path = lists:map(fun (".") -> OrgCWD; (Dir) -> Dir end, OrgPath),
+    true = code:set_path(Path),
+    PrivDir = ?config(priv_dir, Config),
+    IgnDir = filename:join([PrivDir,
+			 atom_to_list(Suite)
+			 ++ "_"
+			 ++ atom_to_list(Testcase)
+			 ++ "_wd"]),
+    ok = file:make_dir(IgnDir),
+    case SetCwd of
+	false ->
+	    ok;
+	_ ->
+	    ok = file:set_cwd(IgnDir),
+	    OrgPWD = case os:getenv("PWD") of
+			 false -> false;
+			 PWD ->
+			     os:putenv("PWD", IgnDir),
+			     PWD
+		     end
+    end,
+    ok = file:write_file(filename:join([IgnDir, "ignore_core_files"]), <<>>),
+    %% cores are dumped in /cores on MacOS X
+    CoresDir = case {?t:os_type(), filelib:is_dir("/cores")} of
+		   {{unix,darwin}, true} ->
+		       filelib:fold_files("/cores",
+					  "^core.*$",
+					  false,
+					  fun (C,Cs) -> [C|Cs] end,
+					  []);
+		   _ ->
+		       false
+	       end,
+    lists:keyreplace(ignore_cores,
+		     1,
+		     Config,
+		     {ignore_cores,
+		      #ignore_cores{org_cwd = OrgCWD,
+				    org_path = OrgPath,
+				    org_pwd_env = OrgPWD,
+				    ign_dir = IgnDir,
+				    cores_dir = CoresDir}}).
+
+restore(Config) ->
+    #ignore_cores{org_cwd = OrgCWD,
+		  org_path = OrgPath,
+		  org_pwd_env = OrgPWD,
+		  ign_dir = IgnDir,
+		  cores_dir = CoresDir} = ?config(ignore_cores, Config),
+    try
+	case CoresDir of
+	    false ->
+		ok;
+	    _ ->
+		%% Move cores dumped by these testcases in /cores
+		%% to cwd.
+		lists:foreach(fun (C) ->
+				      case lists:member(C, CoresDir) of
+					  true -> ok;
+					  _ ->
+					      Dst = filename:join(
+						      [IgnDir,
+						       filename:basename(C)]),
+					      {ok, _} = file:copy(C, Dst),
+					      file:delete(C)
+				      end
+			      end,
+			      filelib:fold_files("/cores",
+						 "^core.*$",
+						 false,
+						 fun (C,Cs) -> [C|Cs] end,
+						 []))
+	end
+    after
+	catch file:set_cwd(OrgCWD),
+	catch code:set_path(OrgPath),
+	case OrgPWD of
+	    false -> ok;
+	    _ -> catch os:putenv("PWD", OrgPWD)
+	end
+    end.
+
+
+dir(Config) ->
+    #ignore_cores{ign_dir = Dir} = ?config(ignore_cores, Config),
+    Dir.
diff --git a/erts/emulator/test/list_bif_SUITE.erl b/erts/emulator/test/list_bif_SUITE.erl
index 65ea88eb2f..ef0929e769 100644
--- a/erts/emulator/test/list_bif_SUITE.erl
+++ b/erts/emulator/test/list_bif_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -18,21 +18,42 @@
 %%
 
 -module(list_bif_SUITE).
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2]).
 -export([hd_test/1,tl_test/1,t_length/1,t_list_to_pid/1,
 	 t_list_to_float/1,t_list_to_integer/1]).
 
 
-all(suite) ->
-    [hd_test,tl_test,t_length,t_list_to_pid,t_list_to_float,t_list_to_integer].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [hd_test, tl_test, t_length, t_list_to_pid,
+     t_list_to_float, t_list_to_integer].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 init_per_testcase(_Case, Config) ->
     ?line Dog = test_server:timetrap(test_server:seconds(60)),
     [{watchdog,Dog}|Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     Dog = ?config(watchdog, Config),
     test_server:timetrap_cancel(Dog),
     ok.
diff --git a/erts/emulator/test/long_timers_test.erl b/erts/emulator/test/long_timers_test.erl
index 28626d26fb..28a4fba9f6 100644
--- a/erts/emulator/test/long_timers_test.erl
+++ b/erts/emulator/test/long_timers_test.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2006-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2006-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
diff --git a/erts/emulator/test/match_spec_SUITE.erl b/erts/emulator/test/match_spec_SUITE.erl
index 69c89f5d2d..2b21fa58f4 100644
--- a/erts/emulator/test/match_spec_SUITE.erl
+++ b/erts/emulator/test/match_spec_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2011. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,7 +19,8 @@
 
 -module(match_spec_SUITE).
 
--export([all/1, not_run/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, not_run/1]).
 -export([test_1/1, test_2/1, test_3/1, bad_match_spec_bin/1,
 	 trace_control_word/1, silent/1, silent_no_ms/1, 
 	 ms_trace2/1, ms_trace3/1, boxed_and_small/1,
@@ -34,29 +35,48 @@
 % This test suite assumes that tracing in general works. What we test is
 % the match spec functionality.
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([init_per_testcase/2, fin_per_testcase/2]).
+-export([init_per_testcase/2, end_per_testcase/2]).
 
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog=?t:timetrap(?t:seconds(10)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
 
-all(suite) ->
-    case test_server:is_native(?MODULE) of
-	false -> [test_1, test_2, test_3, bad_match_spec_bin,
-		  trace_control_word, silent, silent_no_ms, 
-		  ms_trace2, ms_trace3, boxed_and_small,
-		  destructive_in_test_bif, guard_exceptions,
-		  unary_plus, unary_minus, fpe, moving_labels];
-	true  -> [not_run]
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    case test_server:is_native(match_spec_SUITE) of
+	false ->
+	    [test_1, test_2, test_3, bad_match_spec_bin,
+	     trace_control_word, silent, silent_no_ms, ms_trace2,
+	     ms_trace3, boxed_and_small, destructive_in_test_bif,
+	     guard_exceptions, unary_plus, unary_minus, fpe,
+	     moving_labels];
+	true -> [not_run]
     end.
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+	Config.
+
+
 not_run(Config) when is_list(Config) ->
     {skipped, "Native Code"}.
 
@@ -345,15 +365,15 @@ silent_no_ms(Config) when is_list(Config) ->
 	    fun () -> 
 		    ?MODULE:f1(a),
 		    ?MODULE:f2(b, c),
-		    erlang:integer_to_list(id(1)),
+		    _ = erlang:integer_to_list(id(1)),
 		    ?MODULE:f3(d, e),
 		    ?MODULE:f1(start),
 		    ?MODULE:f2(f, g),
-		    erlang:integer_to_list(id(2)),
+		    _ = erlang:integer_to_list(id(2)),
 		    ?MODULE:f3(h, i),
 		    ?MODULE:f1(stop),
 		    ?MODULE:f2(j, k),
-		    erlang:integer_to_list(id(3)),
+		    _ = erlang:integer_to_list(id(3)),
 		    ?MODULE:f3(l, m)
 	    end,
 	    fun (Tracee) ->
@@ -393,15 +413,15 @@ silent_no_ms(Config) when is_list(Config) ->
 	    fun () -> 
 		    ?MODULE:f1(a),
 		    ?MODULE:f2(b, c),
-		    erlang:integer_to_list(id(1)),
+		    _ = erlang:integer_to_list(id(1)),
 		    ?MODULE:f3(d, e),
 		    ?MODULE:f1(start),
 		    ?MODULE:f2(f, g),
-		    erlang:integer_to_list(id(2)),
+		    _ = erlang:integer_to_list(id(2)),
 		    ?MODULE:f3(h, i),
 		    ?MODULE:f1(stop),
 		    ?MODULE:f2(j, k),
-		    erlang:integer_to_list(id(3)),
+		    _ = erlang:integer_to_list(id(3)),
 		    ?MODULE:f3(l, m)
 	    end,
 	    fun (Tracee) ->
@@ -455,18 +475,18 @@ ms_trace2(Config) when is_list(Config) ->
 	    fun () -> 
 		    ?MODULE:f1(a),
 		    ?MODULE:f2(b, c),
-		    erlang:integer_to_list(id(1)),
+		    _ = erlang:integer_to_list(id(1)),
 		    ?MODULE:f3(d, e),
 		    fn([all], [call,return_to,{tracer,Tracer}]),
 		    ?MODULE:f1(f),
 		    f2(g, h),
 		    f1(i),
-		    erlang:integer_to_list(id(2)),
+		    _ = erlang:integer_to_list(id(2)),
 		    ?MODULE:f3(j, k),
 		    fn([call,return_to], []),
 		    ?MODULE:f1(l),
 		    ?MODULE:f2(m, n),
-		    erlang:integer_to_list(id(3)),
+		    _ = erlang:integer_to_list(id(3)),
 		    ?MODULE:f3(o, p)
 	    end,
 	    fun (Tracee) ->
@@ -551,26 +571,26 @@ ms_trace3(Config) when is_list(Config) ->
 		    register(TraceeName, self()),
 		    ?MODULE:f1(a),
 		    ?MODULE:f2(b, c),
-		    erlang:integer_to_list(id(1)),
+		    _ = erlang:integer_to_list(id(1)),
 		    ?MODULE:f3(d, e),
 		    Controller ! {self(),Tag,start},
 		    receive {Controller,Tag,started} -> ok end,
 		    ?MODULE:f1(f),
 		    f2(g, h),
 		    f1(i),
-		    erlang:integer_to_list(id(2)),
+		    _ = erlang:integer_to_list(id(2)),
 		    ?MODULE:f3(j, k),
 		    Controller ! {self(),Tag,stop_1},
 		    receive {Controller,Tag,stopped_1} -> ok end,
 		    ?MODULE:f1(l),
 		    ?MODULE:f2(m, n),
-		    erlang:integer_to_list(id(3)),
+		    _ = erlang:integer_to_list(id(3)),
 		    ?MODULE:f3(o, p),
 		    Controller ! {self(),Tag,stop_2},
 		    receive {Controller,Tag,stopped_2} -> ok end,
 		    ?MODULE:f1(q),
 		    ?MODULE:f2(r, s),
-		    erlang:integer_to_list(id(4)),
+		    _ = erlang:integer_to_list(id(4)),
 		    ?MODULE:f3(t, u)
 	    end,
 	    
diff --git a/erts/emulator/test/module_info_SUITE.erl b/erts/emulator/test/module_info_SUITE.erl
index f34a2b496c..a2a052671f 100644
--- a/erts/emulator/test/module_info_SUITE.erl
+++ b/erts/emulator/test/module_info_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2005-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2005-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,9 +19,11 @@
 
 -module(module_info_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1,init_per_testcase/2,end_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
 	 exports/1,functions/1,native/1]).
 
 %%-compile(native).
@@ -29,8 +31,29 @@
 %% Helper.
 -export([native_proj/1,native_filter/1]).
 
-all(suite) ->
-    [exports,functions,native].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    modules().
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
+modules() -> 
+    [exports, functions, native].
 
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog = ?t:timetrap(?t:minutes(3)),
@@ -42,14 +65,18 @@ end_per_testcase(_Func, Config) ->
 
 %% Should return all functions exported from this module. (local)
 all_exported() ->
-    All = add_arity(all(suite)),
-    lists:sort([{all,1},{init_per_testcase,2},{end_per_testcase,2},
+    All = add_arity(modules()),
+    lists:sort([{all,0},{suite,0},{groups,0},
+		{init_per_suite,1},{end_per_suite,1},
+		{init_per_group,2},{end_per_group,2},
+		{init_per_testcase,2},{end_per_testcase,2},
 		{module_info,0},{module_info,1},{native_proj,1},
 		{native_filter,1}|All]).
 
 %% Should return all functions in this module. (local)
 all_functions() ->
-    Locals = [{add_arity,1},{add_arity,2},{all_exported,0},{all_functions,0}],
+    Locals = [{add_arity,1},{add_arity,2},{all_exported,0},{all_functions,0},
+	      {modules,0}],
     lists:sort(Locals++all_exported()).
 
 %% Test that the list of exported functions from this module is correct.
diff --git a/erts/emulator/test/monitor_SUITE.erl b/erts/emulator/test/monitor_SUITE.erl
index 68e378dfec..9cf4ed702a 100644
--- a/erts/emulator/test/monitor_SUITE.erl
+++ b/erts/emulator/test/monitor_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,29 +19,49 @@
 
 -module(monitor_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
 	 case_1/1, case_1a/1, case_2/1, case_2a/1, mon_e_1/1, demon_e_1/1, demon_1/1,
-	 demon_2/1, demon_3/1, demonitor_flush/1, remove_monitor/1,
+	 demon_2/1, demon_3/1, demonitor_flush/1,
 	 local_remove_monitor/1, remote_remove_monitor/1, mon_1/1, mon_2/1,
 	 large_exit/1, list_cleanup/1, mixer/1, named_down/1, otp_5827/1]).
 
--export([init_per_testcase/2, fin_per_testcase/2]).
+-export([init_per_testcase/2, end_per_testcase/2]).
 
 -export([y2/1, g/1, g0/0, g1/0, large_exit_sub/1]).
 
-all(suite) ->
-    [case_1, case_1a, case_2, case_2a, mon_e_1, demon_e_1, demon_1, mon_1,
-     mon_2, demon_2, demon_3, demonitor_flush, remove_monitor,
-     large_exit, list_cleanup, mixer, named_down,
-     otp_5827].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [case_1, case_1a, case_2, case_2a, mon_e_1, demon_e_1,
+     demon_1, mon_1, mon_2, demon_2, demon_3,
+     demonitor_flush, {group, remove_monitor}, large_exit,
+     list_cleanup, mixer, named_down, otp_5827].
+
+groups() -> 
+    [{remove_monitor, [],
+      [local_remove_monitor, remote_remove_monitor]}].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog=?t:timetrap(?t:minutes(15)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
@@ -315,8 +335,6 @@ demonitor_flush_test(Node) ->
 -define(RM_MON_GROUPS, 100).
 -define(RM_MON_GPROCS, 100).
 
-remove_monitor(suite) ->
-    [local_remove_monitor, remote_remove_monitor].
 
 local_remove_monitor(Config) when is_list(Config) ->
     Gs = generate(fun () -> start_remove_monitor_group(node()) end,
diff --git a/erts/emulator/test/mtx_SUITE.erl b/erts/emulator/test/mtx_SUITE.erl
index ae77fe4d89..d379b8a7fa 100644
--- a/erts/emulator/test/mtx_SUITE.erl
+++ b/erts/emulator/test/mtx_SUITE.erl
@@ -26,9 +26,11 @@
 
 %%-define(line_trace,true).
 
--include("test_server.hrl").
+-include_lib("common_test/include/ct.hrl").
 
--export([all/1, init_per_suite/1, end_per_suite/1, init_per_testcase/2, fin_per_testcase/2]).
+-export([all/0,suite/0,groups/0,
+	 init_per_group/2,end_per_group/2, init_per_suite/1, 
+	 end_per_suite/1, init_per_testcase/2, end_per_testcase/2]).
 
 -export([long_rwlock/1,
 	 hammer_ets_rwlock/1,
@@ -66,19 +68,16 @@ init_per_testcase(_Case, Config) ->
     Dog = ?t:timetrap(?t:minutes(15)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
-all(suite) ->
-    [
-     long_rwlock,
-     hammer_rwlock_check,
-     hammer_rwlock,
-     hammer_tryrwlock_check,
-     hammer_tryrwlock,
-     hammer_ets_rwlock,
-     hammer_sched_long_rwlock_check,
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [long_rwlock, hammer_rwlock_check, hammer_rwlock,
+     hammer_tryrwlock_check, hammer_tryrwlock,
+     hammer_ets_rwlock, hammer_sched_long_rwlock_check,
      hammer_sched_long_rwlock,
      hammer_sched_long_freqread_rwlock_check,
      hammer_sched_long_freqread_rwlock,
@@ -86,15 +85,22 @@ all(suite) ->
      hammer_sched_long_tryrwlock,
      hammer_sched_long_freqread_tryrwlock_check,
      hammer_sched_long_freqread_tryrwlock,
-     hammer_sched_rwlock_check,
-     hammer_sched_rwlock,
+     hammer_sched_rwlock_check, hammer_sched_rwlock,
      hammer_sched_freqread_rwlock_check,
      hammer_sched_freqread_rwlock,
-     hammer_sched_tryrwlock_check,
-     hammer_sched_tryrwlock,
+     hammer_sched_tryrwlock_check, hammer_sched_tryrwlock,
      hammer_sched_freqread_tryrwlock_check,
-     hammer_sched_freqread_tryrwlock
-    ].
+     hammer_sched_freqread_tryrwlock].
+
+groups() -> 
+    [].
+
+init_per_group(_GroupName, Config) ->
+	Config.
+
+end_per_group(_GroupName, Config) ->
+	Config.
+
 
 long_rwlock(Config) when is_list(Config) ->
     statistics(runtime),
diff --git a/erts/emulator/test/nested_SUITE.erl b/erts/emulator/test/nested_SUITE.erl
index 310892424e..f889712f46 100644
--- a/erts/emulator/test/nested_SUITE.erl
+++ b/erts/emulator/test/nested_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,11 +19,33 @@
 
 -module(nested_SUITE).
 
--export([all/1, case_in_case/1, case_in_after/1, catch_in_catch/1, bif_in_bif/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 case_in_case/1, case_in_after/1, catch_in_catch/1, bif_in_bif/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [case_in_case, case_in_after, catch_in_catch,
+     bif_in_bif].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) -> [case_in_case, case_in_after, catch_in_catch, bif_in_bif].
 
 case_in_case(suite) -> [];
 case_in_case(Config) when is_list(Config) ->
diff --git a/erts/emulator/test/nif_SUITE.erl b/erts/emulator/test/nif_SUITE.erl
index 42947aa6be..54cbf6b974 100644
--- a/erts/emulator/test/nif_SUITE.erl
+++ b/erts/emulator/test/nif_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2009-2010. All Rights Reserved.
+%% Copyright Ericsson AB 2010-2010. All Rights Reserved.
 %%
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -23,14 +23,18 @@
 -define(CHECK(Exp,Got), check(Exp,Got,?LINE)).
 %%-define(CHECK(Exp,Got), ?line Exp = Got).
 
--include("test_server.hrl").
-
--export([all/1, 
-	 %%init_per_testcase/2, 
-	 fin_per_testcase/2, basic/1, reload/1, upgrade/1, heap_frag/1,
-	 types/1, many_args/1, binaries/1, get_string/1, get_atom/1, api_macros/1,
-	 from_array/1, iolist_as_binary/1, resource/1, resource_binary/1, resource_takeover/1,
-	 threading/1, send/1, send2/1, send3/1, send_threaded/1, neg/1, is_checks/1,
+-include_lib("test_server/include/test_server.hrl").
+
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, 
+	 end_per_testcase/2, basic/1, reload/1, upgrade/1, heap_frag/1,
+	 types/1, many_args/1, binaries/1, get_string/1, get_atom/1, 
+	 api_macros/1,
+	 from_array/1, iolist_as_binary/1, resource/1, resource_binary/1, 
+	 resource_takeover/1,
+	 threading/1, send/1, send2/1, send3/1, send_threaded/1, neg/1, 
+	 is_checks/1,
 	 get_length/1, make_atom/1, make_string/1]).
 
 -export([many_args_100/100]).
@@ -40,7 +44,7 @@
 %% 	 list_seq/1,type_test/0,tuple_2_list/1,is_identical/2,compare/2,
 %% 	 clone_bin/1,make_sub_bin/3,string_to_bin/2,atom_to_bin/2,macros/1,
 %% 	 tuple_2_list_and_tuple/1,iolist_2_bin/1,get_resource_type/1,alloc_resource/2,
-%% 	 make_resource/1,get_resource/2,release_resource/1,last_resource_dtor_call/0,
+%% 	 make_resource/1,get_resource/2,release_resource/1,last_resource_dtor_call/0, suite/0,
 %% 	 make_new_resource/2,make_new_resource_binary/1,send_list_seq/2,send_new_blob/2,
 %% 	 alloc_msgenv/0,clear_msgenv/1,grow_blob/2,send_blob/2,send_blob_thread/3,
 %% 	 join_send_thread/1]).
@@ -48,17 +52,37 @@
 
 -define(nif_stub,nif_stub_error(?LINE)).
 
-all(suite) ->
-    [basic, reload, upgrade, heap_frag, types, many_args, binaries, get_string,
-     get_atom, api_macros, from_array, iolist_as_binary, resource, resource_binary,
-     resource_takeover, threading, send, send2, send3, send_threaded, neg, is_checks,
-     get_length, make_atom, make_string].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [basic, reload, upgrade, heap_frag, types, many_args,
+     binaries, get_string, get_atom, api_macros, from_array,
+     iolist_as_binary, resource, resource_binary,
+     resource_takeover, threading, send, send2, send3,
+     send_threaded, neg, is_checks, get_length, make_atom,
+     make_string].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
-%%init_per_testcase(_Case, Config) ->
-%%    ?line Dog = ?t:timetrap(?t:seconds(60*60*24)),
-%%    [{watchdog, Dog}|Config].
+init_per_testcase(_Case, Config) ->
+%    ?line Dog = ?t:timetrap(?t:seconds(60*60*24)),
+    Config.
 
-fin_per_testcase(_Func, _Config) ->
+end_per_testcase(_Func, _Config) ->
     %%Dog = ?config(watchdog, Config),
     %%?t:timetrap_cancel(Dog),
     P1 = code:purge(nif_mod),
diff --git a/erts/emulator/test/nif_SUITE_data/nif_mod.erl b/erts/emulator/test/nif_SUITE_data/nif_mod.erl
index 7888a589e7..b99a2c90ee 100644
--- a/erts/emulator/test/nif_SUITE_data/nif_mod.erl
+++ b/erts/emulator/test/nif_SUITE_data/nif_mod.erl
@@ -19,7 +19,7 @@
 
 -module(nif_mod).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 -export([load_nif_lib/2, load_nif_lib/3, start/0, lib_version/0, call_history/0,
 	 get_priv_data_ptr/0, make_new_resource/2, get_resource/2]).
diff --git a/erts/emulator/test/nif_SUITE_data/tester.erl b/erts/emulator/test/nif_SUITE_data/tester.erl
index 9df2158200..b393e29b82 100644
--- a/erts/emulator/test/nif_SUITE_data/tester.erl
+++ b/erts/emulator/test/nif_SUITE_data/tester.erl
@@ -1,6 +1,6 @@
 -module(tester).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 -export([load_nif_lib/2, run/0]).
 
diff --git a/erts/emulator/test/node_container_SUITE.erl b/erts/emulator/test/node_container_SUITE.erl
index f3d9eb783b..416fdad941 100644
--- a/erts/emulator/test/node_container_SUITE.erl
+++ b/erts/emulator/test/node_container_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2002-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2002-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -29,10 +29,12 @@
 
 %-define(line_trace, 1).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 %-compile(export_all).
--export([all/1, init_per_testcase/2, fin_per_testcase/2, end_per_suite/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, init_per_testcase/2, 
+	 end_per_testcase/2,
 	 node_container_refc_check/1]).
 
 -export([term_to_binary_to_term_eq/1,
@@ -55,25 +57,30 @@
 
 -define(DEFAULT_TIMEOUT, ?t:minutes(10)).
 
-all(doc) -> [];
-all(suite) ->
-    [term_to_binary_to_term_eq,
-     round_trip_eq,
-     cmp,
-     ref_eq,
-     node_table_gc,
-     dist_link_refc,
-     dist_monitor_refc,
-     node_controller_refc,
-     ets_refc,
-     match_spec_refc,
-     timer_refc,
-     otp_4715,
-     pid_wrap,
-     port_wrap,
-     bad_nc,
-     unique_pid,
-     iter_max_procs].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [term_to_binary_to_term_eq, round_trip_eq, cmp, ref_eq,
+     node_table_gc, dist_link_refc, dist_monitor_refc,
+     node_controller_refc, ets_refc, match_spec_refc,
+     timer_refc, otp_4715, pid_wrap, port_wrap, bad_nc,
+     unique_pid, iter_max_procs].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    available_internal_state(false).
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 available_internal_state(Bool) when Bool == true; Bool == false ->
     case {Bool,
@@ -95,14 +102,11 @@ init_per_testcase(_Case, Config) when is_list(Config) ->
     available_internal_state(true),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Case, Config) when is_list(Config) ->
+end_per_testcase(_Case, Config) when is_list(Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog),
     ok.
 
-end_per_suite(_Config) ->
-    available_internal_state(false).
-
 %%%
 %%% The test cases -------------------------------------------------------------
 %%%
diff --git a/erts/emulator/test/nofrag_SUITE.erl b/erts/emulator/test/nofrag_SUITE.erl
index ece55f433c..9287158981 100644
--- a/erts/emulator/test/nofrag_SUITE.erl
+++ b/erts/emulator/test/nofrag_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2007-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2007-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,9 +19,11 @@
 
 -module(nofrag_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1,init_per_testcase/2,end_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
 	 error_handler/1,error_handler_apply/1,
 	 error_handler_fixed_apply/1,error_handler_fun/1,
 	 error_handler_tuple_fun/1,
@@ -30,9 +32,28 @@
 %% Exported functions for an error_handler module.
 -export([undefined_function/3,undefined_lambda/3,breakpoint/3]).
 
-all(suite) ->
-    [error_handler,error_handler_apply,error_handler_fixed_apply,
-     error_handler_fun,error_handler_tuple_fun,debug_breakpoint].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [error_handler, error_handler_apply,
+     error_handler_fixed_apply, error_handler_fun,
+     error_handler_tuple_fun, debug_breakpoint].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog = ?t:timetrap(?t:minutes(3)),
diff --git a/erts/emulator/test/num_bif_SUITE.erl b/erts/emulator/test/num_bif_SUITE.erl
index d009994e2d..bf101b038d 100644
--- a/erts/emulator/test/num_bif_SUITE.erl
+++ b/erts/emulator/test/num_bif_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,7 +19,7 @@
 
 -module(num_bif_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 %% Tests the BIFs:
 %% 	abs/1
@@ -31,15 +31,36 @@
 %%	round/1
 %%	trunc/1
 
--export([all/1, t_abs/1, t_float/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, t_abs/1, t_float/1,
 	 t_float_to_list/1, t_integer_to_list/1,
 	 t_list_to_integer/1,
-	 t_list_to_float/1, t_list_to_float_safe/1, t_list_to_float_risky/1,
+	 t_list_to_float_safe/1, t_list_to_float_risky/1,
 	 t_round/1, t_trunc/1]).
 
-all(suite) -> [t_abs, t_float, t_float_to_list, t_integer_to_list,
-	       t_list_to_float, t_list_to_integer,
-	       t_round, t_trunc].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [t_abs, t_float, t_float_to_list, t_integer_to_list,
+     {group, t_list_to_float}, t_list_to_integer, t_round,
+     t_trunc].
+
+groups() -> 
+    [{t_list_to_float, [],
+      [t_list_to_float_safe, t_list_to_float_risky]}].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 t_abs(Config) when is_list(Config) ->
     %% Floats.
@@ -140,7 +161,6 @@ t_integer_to_list(Config) when is_list(Config) ->
 
 %% Tests list_to_float/1.
 
-t_list_to_float(suite) -> [t_list_to_float_safe, t_list_to_float_risky].
 
 t_list_to_float_safe(Config) when is_list(Config) ->
     ?line 0.0 = list_to_float(id("0.0")),
diff --git a/erts/emulator/test/old_mod.erl b/erts/emulator/test/old_mod.erl
index 6c47ba6f8f..124842390a 100644
--- a/erts/emulator/test/old_mod.erl
+++ b/erts/emulator/test/old_mod.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2003-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2003-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
diff --git a/erts/emulator/test/old_scheduler_SUITE.erl b/erts/emulator/test/old_scheduler_SUITE.erl
index 70348f64db..6f9c0a9dab 100644
--- a/erts/emulator/test/old_scheduler_SUITE.erl
+++ b/erts/emulator/test/old_scheduler_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2004-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2004-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,24 +19,44 @@
 
 -module(old_scheduler_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1, init_per_testcase/2, fin_per_testcase/2]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, end_per_testcase/2]).
 -export([equal/1, many_low/1, few_low/1, max/1, high/1]).
 
 -define(default_timeout, ?t:minutes(11)).
 
-all(suite) ->
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
     case catch erlang:system_info(modified_timing_level) of
 	Level when is_integer(Level) ->
 	    {skipped,
-	     "Modified timing (level " ++ integer_to_list(Level)
-	     ++ ") is enabled. Testcases gets messed up by modfied "
-	     "timing."};
-	_ ->
-	    [equal, many_low, few_low, max, high]
+	     "Modified timing (level " ++
+		 integer_to_list(Level) ++
+		 ") is enabled. Testcases gets messed "
+	     "up by modfied timing."};
+	_ -> [equal, many_low, few_low, max, high]
     end.
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 %%-----------------------------------------------------------------------------------
 %% TEST SUITE DESCRIPTION
 %%
@@ -63,7 +83,7 @@ init_per_testcase(_Case, Config) ->
     ?line MS = erlang:system_flag(multi_scheduling, block),
     [{prio,Prio},{watchdog,Dog},{multi_scheduling, MS}|Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     erlang:system_flag(multi_scheduling, unblock),
     Dog=?config(watchdog, Config),
     Prio=?config(prio, Config),
diff --git a/erts/emulator/test/op_SUITE.erl b/erts/emulator/test/op_SUITE.erl
index 55d8d9ab0f..7bea35e980 100644
--- a/erts/emulator/test/op_SUITE.erl
+++ b/erts/emulator/test/op_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,22 +19,43 @@
 
 -module(op_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
 	 bsl_bsr/1,logical/1,t_not/1,relop_simple/1,relop/1,complex_relop/1]).
 
 -export([]).
 -import(lists, [foldl/3,flatmap/2]).
 
-all(suite) ->
-    [bsl_bsr,logical,t_not,relop_simple,relop,complex_relop].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [bsl_bsr, logical, t_not, relop_simple, relop,
+     complex_relop].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 init_per_testcase(Case, Config) when is_atom(Case), is_list(Config) ->
     Dog=?t:timetrap(?t:minutes(3)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
diff --git a/erts/emulator/test/port_SUITE.erl b/erts/emulator/test/port_SUITE.erl
index 7fe532abd0..6da9a7e0ad 100644
--- a/erts/emulator/test/port_SUITE.erl
+++ b/erts/emulator/test/port_SUITE.erl
@@ -73,18 +73,19 @@
 %%
 
 
--export([all/1, init_per_testcase/2, fin_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, end_per_testcase/2,
 	 init_per_suite/1, end_per_suite/1,
-	 stream/1, stream_small/1, stream_big/1,
+	 stream_small/1, stream_big/1,
 	 basic_ping/1, slow_writes/1, bad_packet/1, bad_port_messages/1,
-	 multiple_packets/1, mul_basic/1, mul_slow_writes/1,
+	 mul_basic/1, mul_slow_writes/1,
 	 dying_port/1, port_program_with_path/1,
 	 open_input_file_port/1, open_output_file_port/1,
 	 iter_max_ports/1, eof/1, input_only/1, output_only/1,
 	 name1/1,
-	 t_binary/1, options/1, parallell/1, t_exit/1,
+	 t_binary/1, parallell/1, t_exit/1,
 	 env/1, bad_env/1, cd/1, exit_status/1,
-	 tps/1, tps_16_bytes/1, tps_1K/1, line/1, stderr_to_stdout/1,
+	 tps_16_bytes/1, tps_1K/1, line/1, stderr_to_stdout/1,
 	 otp_3906/1, otp_4389/1, win_massive/1, win_massive_client/1,
 	 mix_up_ports/1, otp_5112/1, otp_5119/1, otp_6224/1,
 	 exit_status_multi_scheduling_block/1, ports/1,
@@ -98,31 +99,42 @@
 -export([otp_3906_forker/5, otp_3906_start_forker_starter/4]).
 -export([env_slave_main/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 -include_lib("kernel/include/file.hrl").
 
-all(suite) ->
-    [
-     otp_6224, stream, basic_ping, slow_writes, bad_packet,
-     bad_port_messages, options, multiple_packets, parallell,
-     dying_port, port_program_with_path,
-     open_input_file_port, open_output_file_port,
-     name1,
-     env, bad_env, cd, exit_status,
-     iter_max_ports, t_exit, tps, line, stderr_to_stdout,
-     otp_3906, otp_4389, win_massive, mix_up_ports,
-     otp_5112, otp_5119,
-     exit_status_multi_scheduling_block,
-     ports, spawn_driver, spawn_executable, close_deaf_port,
-     unregister_name
-    ].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [otp_6224, {group, stream}, basic_ping, slow_writes,
+     bad_packet, bad_port_messages, {group, options},
+     {group, multiple_packets}, parallell, dying_port,
+     port_program_with_path, open_input_file_port,
+     open_output_file_port, name1, env, bad_env, cd,
+     exit_status, iter_max_ports, t_exit, {group, tps}, line,
+     stderr_to_stdout, otp_3906, otp_4389, win_massive,
+     mix_up_ports, otp_5112, otp_5119,
+     exit_status_multi_scheduling_block, ports, spawn_driver,
+     spawn_executable, close_deaf_port, unregister_name].
+
+groups() -> 
+    [{stream, [], [stream_small, stream_big]},
+     {options, [], [t_binary, eof, input_only, output_only]},
+     {multiple_packets, [], [mul_basic, mul_slow_writes]},
+     {tps, [], [tps_16_bytes, tps_1K]}].
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 -define(DEFAULT_TIMEOUT, ?t:minutes(5)).
 
 init_per_testcase(Case, Config) ->
     [{testcase, Case} |Config].
 
-fin_per_testcase(_Case, _Config) ->
+end_per_testcase(_Case, _Config) ->
     ok.
 
 init_per_suite(Config) when is_list(Config) ->
@@ -191,7 +203,6 @@ win_massive_loop(P,N) ->
     
 
 
-stream(suite) -> [stream_small, stream_big].
 
 %% Test that we can send a stream of bytes and get it back.
 %% We will send only a small amount of data, to avoid deadlock.
@@ -304,7 +315,6 @@ bad_message(PortTest, Message) ->
 %% Tests various options (stream and {packet, Number} are implicitly
 %% tested in other test cases).
 
-options(suite) -> [t_binary, eof, input_only, output_only].
 
 %% Tests the 'binary' option for a port.
 
@@ -416,7 +426,6 @@ output_and_verify(Config, Filename, Options, Data) ->
 %% Test that receiving several packages written in the same
 %% write operation works.
 
-multiple_packets(suite) -> [mul_basic, mul_slow_writes].
 
 %% Basic test of receiving multiple packages, written in
 %% one operation by the other end.
@@ -740,7 +749,6 @@ suicide_port(Config) when is_list(Config) ->
     ?line exit(Port, die),
     ?line receive after infinity -> ok end.
 
-tps(suite) -> [tps_16_bytes, tps_1K].
 
 tps_16_bytes(doc) -> "";
 tps_16_bytes(suite) -> [];
@@ -1049,8 +1057,10 @@ otp_3906(Config)  when is_list(Config) ->
 -define(OTP_3906_MAX_CONC_OSP, 50).
 
 otp_3906(Config, OSName) ->
-    ?line TSDir = filename:dirname(code:which(test_server)),
-    ?line {ok, Variables} = file:consult(filename:join(TSDir, "variables")),
+    ?line DataDir = filename:dirname(proplists:get_value(data_dir,Config)),
+    ?line {ok, Variables} = file:consult(
+			      filename:join([DataDir,"..","..",
+					     "test_server","variables"])),
     case lists:keysearch('CC', 1, Variables) of
 	{value,{'CC', CC}} ->
 	    SuiteDir = filename:dirname(code:which(?MODULE)),
diff --git a/erts/emulator/test/port_bif_SUITE.erl b/erts/emulator/test/port_bif_SUITE.erl
index f4e0bb9fa8..946978c580 100644
--- a/erts/emulator/test/port_bif_SUITE.erl
+++ b/erts/emulator/test/port_bif_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -20,25 +20,47 @@
 -module(port_bif_SUITE).
 
 
--export([all/1, command/1, command_e/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, command/1,
 	 command_e_1/1, command_e_2/1, command_e_3/1, command_e_4/1,
-	 port_info/1, port_info1/1, port_info2/1,
+	 port_info1/1, port_info2/1,
 	 connect/1, control/1, echo_to_busy/1]).
 
 -export([do_command_e_1/1, do_command_e_2/1, do_command_e_4/1]).
 
--export([init_per_testcase/2, fin_per_testcase/2]).
+-export([init_per_testcase/2, end_per_testcase/2]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [command, {group, port_info}, connect, control,
+     echo_to_busy].
+
+groups() -> 
+    [{command_e, [],
+      [command_e_1, command_e_2, command_e_3, command_e_4]},
+     {port_info, [], [port_info1, port_info2]}].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) ->
-    [command, port_info, connect, control, echo_to_busy].
 
 
 init_per_testcase(_Func, Config) when is_list(Config) ->
     Dog=test_server:timetrap(test_server:minutes(10)),
     [{watchdog, Dog}|Config].
-fin_per_testcase(_Func, Config) when is_list(Config) ->
+end_per_testcase(_Func, Config) when is_list(Config) ->
     Dog=?config(watchdog, Config),
     test_server:timetrap_cancel(Dog).
 
@@ -69,11 +91,6 @@ do_command(P, Data) ->
     end.
 
 
-command_e(suite) -> [command_e_1,
-		     command_e_2,
-		     command_e_3,
-		     command_e_4];
-command_e(doc) -> "Tests port_command/2 with errors".
 
 %% port_command/2: badarg 1st arg
 command_e_1(Config) when is_list(Config) ->
@@ -161,7 +178,6 @@ do_command_e_4(Program) ->
     ?line erlang:port_command(P, Data),
     exit(survived).
 
-port_info(suite) -> [port_info1, port_info2].
 
 %% Tests the port_info/1 BIF
 port_info1(Config) when is_list(Config) ->
diff --git a/erts/emulator/test/process_SUITE.erl b/erts/emulator/test/process_SUITE.erl
index 77f850d0fb..f7553e5815 100644
--- a/erts/emulator/test/process_SUITE.erl
+++ b/erts/emulator/test/process_SUITE.erl
@@ -25,12 +25,13 @@
 %%	process_info/1,2
 %%	register/2 (partially)
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 -define(heap_binary_size, 64).
 
--export([all/1, spawn_with_binaries/1,
-	 t_exit_1/1, t_exit_2/1, t_exit_2_other/1, t_exit_2_other_normal/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, spawn_with_binaries/1,
+	 t_exit_1/1, t_exit_2_other/1, t_exit_2_other_normal/1,
 	 self_exit/1, normal_suicide_exit/1, abnormal_suicide_exit/1,
 	 t_exit_2_catch/1, trap_exit_badarg/1, trap_exit_badarg_in_bif/1,
 	 exit_and_timeout/1, exit_twice/1,
@@ -46,39 +47,67 @@
 	 processes_large_tab/1, processes_default_tab/1, processes_small_tab/1,
 	 processes_this_tab/1, processes_apply_trap/1,
 	 processes_last_call_trap/1, processes_gc_trap/1,
-	 processes_term_proc_list/1, processes_bif/1,
-	 otp_7738/1, otp_7738_waiting/1, otp_7738_suspended/1,
+	 processes_term_proc_list/1,
+	 otp_7738_waiting/1, otp_7738_suspended/1,
 	 otp_7738_resume/1]).
 -export([prio_server/2, prio_client/2]).
 
--export([init_per_testcase/2, fin_per_testcase/2, end_per_suite/1]).
+-export([init_per_testcase/2, end_per_testcase/2]).
 
 -export([hangaround/2, processes_bif_test/0, do_processes/1,
 	 processes_term_proc_list_test/1]).
 
-all(suite) ->
-    [spawn_with_binaries, t_exit_1, t_exit_2,
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [spawn_with_binaries, t_exit_1, {group, t_exit_2},
      trap_exit_badarg, trap_exit_badarg_in_bif,
-     t_process_info, process_info_other_msg, process_info_other_dist_msg,
-     process_info_2_list,
-     process_info_lock_reschedule, process_info_lock_reschedule2,
-     process_status_exiting,
-     bump_reductions, low_prio, yield, yield2, otp_4725, bad_register,
-     garbage_collect, process_info_messages, process_flag_badarg, process_flag_heap_size,
-     spawn_opt_heap_size, otp_6237, processes_bif, otp_7738].
+     t_process_info, process_info_other_msg,
+     process_info_other_dist_msg, process_info_2_list,
+     process_info_lock_reschedule,
+     process_info_lock_reschedule2, process_status_exiting,
+     bump_reductions, low_prio, yield, yield2, otp_4725,
+     bad_register, garbage_collect, process_info_messages,
+     process_flag_badarg, process_flag_heap_size,
+     spawn_opt_heap_size, otp_6237, {group, processes_bif},
+     {group, otp_7738}].
+
+groups() -> 
+    [{t_exit_2, [],
+      [t_exit_2_other, t_exit_2_other_normal, self_exit,
+       normal_suicide_exit, abnormal_suicide_exit,
+       t_exit_2_catch, exit_and_timeout, exit_twice]},
+     {processes_bif, [],
+      [processes_large_tab, processes_default_tab,
+       processes_small_tab, processes_this_tab,
+       processes_last_call_trap, processes_apply_trap,
+       processes_gc_trap, processes_term_proc_list]},
+     {otp_7738, [],
+      [otp_7738_waiting, otp_7738_suspended,
+       otp_7738_resume]}].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(Config) ->
+    catch erts_debug:set_internal_state(available_internal_state, false),
+    Config.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog=?t:timetrap(?t:minutes(10)),
     [{watchdog, Dog},{testcase, Func}|Config].
 
-fin_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
+end_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
-end_per_suite(Config) ->
-    catch erts_debug:set_internal_state(available_internal_state, false),
-    Config.
-
 fun_spawn(Fun) ->
     spawn_link(erlang, apply, [Fun, []]).
 
@@ -117,10 +146,6 @@ t_exit_1() ->
 	      {'EXIT', Pid, Garbage} -> ok
 	  end.
 
-t_exit_2(suite) -> [t_exit_2_other, t_exit_2_other_normal, 
-		    self_exit, normal_suicide_exit,
-		    abnormal_suicide_exit, t_exit_2_catch,
-		    exit_and_timeout, exit_twice].
 
 %% Tests exit/2 with a lot of data in the exit message.
 t_exit_2_other(Config) when is_list(Config) ->
@@ -1227,17 +1252,6 @@ otp_6237_select_loop() ->
     otp_6237_select_loop().
 
 
-processes_bif(doc) ->
-    [];
-processes_bif(suite) ->
-    [processes_large_tab,
-     processes_default_tab,
-     processes_small_tab,
-     processes_this_tab,
-     processes_last_call_trap,
-     processes_apply_trap,
-     processes_gc_trap,
-     processes_term_proc_list].
 
 -define(NoTestProcs, 10000).
 -record(processes_bif_info, {min_start_reds,
@@ -1965,10 +1979,6 @@ processes_term_proc_list_test(MustChk) ->
     ?line erlang:system_flag(multi_scheduling, unblock),
     ?line as_expected.
 
-otp_7738(doc) ->
-    [];
-otp_7738(suite) ->
-    [otp_7738_waiting, otp_7738_suspended, otp_7738_resume].
 
 otp_7738_waiting(doc) ->
     [];
diff --git a/erts/emulator/test/pseudoknot_SUITE.erl b/erts/emulator/test/pseudoknot_SUITE.erl
index 907204cf93..5a7cdcecd5 100644
--- a/erts/emulator/test/pseudoknot_SUITE.erl
+++ b/erts/emulator/test/pseudoknot_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2001-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2001-2011. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,9 +19,29 @@
 
 -module(pseudoknot_SUITE).
 
--export([all/1,test/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,test/1]).
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [test].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) -> [test].
     
 test(Config) when is_list(Config) ->
     statistics(runtime),
@@ -3274,13 +3294,13 @@ most_distant_atom(Sols) ->
     maximum(map(sol_most_distant_atom, Sols)).
 
 maximum([H|T]) ->
-    max(T,H).
+    max1(T,H).
 
-max([H|T],M) when is_float(H), is_float(M), H > M ->
-    max(T,H);
-max([_|T],M) ->
-    max(T,M);
-max([],M) -> M.
+max1([H|T],M) when is_float(H), is_float(M), H > M ->
+    max1(T,H);
+max1([_|T],M) ->
+    max1(T,M);
+max1([],M) -> M.
 
 map(_Func,[]) -> [];
 map(Func,[H|T]) -> 
diff --git a/erts/emulator/test/random_iolist.erl b/erts/emulator/test/random_iolist.erl
index 4bce347d9a..8f21b5a3b3 100644
--- a/erts/emulator/test/random_iolist.erl
+++ b/erts/emulator/test/random_iolist.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2008-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2008-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
diff --git a/erts/emulator/test/receive_SUITE.erl b/erts/emulator/test/receive_SUITE.erl
index 40ebf2bd21..2ac696b4c7 100644
--- a/erts/emulator/test/receive_SUITE.erl
+++ b/erts/emulator/test/receive_SUITE.erl
@@ -21,21 +21,40 @@
 
 %% Tests receive after.
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
 	 call_with_huge_message_queue/1,receive_in_between/1]).
 
--export([init_per_testcase/2,fin_per_testcase/2]).
+-export([init_per_testcase/2,end_per_testcase/2]).
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [call_with_huge_message_queue, receive_in_between].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
-all(suite) ->
-    [call_with_huge_message_queue,receive_in_between].
 
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog=?t:timetrap(?t:minutes(3)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
diff --git a/erts/emulator/test/ref_SUITE.erl b/erts/emulator/test/ref_SUITE.erl
index fa77095efd..327d55fead 100644
--- a/erts/emulator/test/ref_SUITE.erl
+++ b/erts/emulator/test/ref_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,23 +19,44 @@
 
 -module(ref_SUITE).
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2]).
 -export([wrap_1/1]).
 
 -export([loop_ref/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 init_per_testcase(_, Config) ->
     ?line Dog=test_server:timetrap(test_server:minutes(2)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_, Config) ->
+end_per_testcase(_, Config) ->
     Dog=?config(watchdog, Config),
     test_server:timetrap_cancel(Dog),
     ok.
 
-all(suite) -> [wrap_1].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [wrap_1].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 wrap_1(doc) -> "Check that refs don't wrap around easily.";
 wrap_1(Config) when is_list(Config) ->
diff --git a/erts/emulator/test/register_SUITE.erl b/erts/emulator/test/register_SUITE.erl
index c03ee23b2e..d88df8d59d 100644
--- a/erts/emulator/test/register_SUITE.erl
+++ b/erts/emulator/test/register_SUITE.erl
@@ -1,7 +1,7 @@
 %% 
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2009. All Rights Reserved.
+%% Copyright Ericsson AB 2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -22,24 +22,43 @@
 
 %-define(line_trace, 1).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 %-compile(export_all).
--export([all/1, init_per_testcase/2, fin_per_testcase/2]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, end_per_testcase/2]).
 
 -export([otp_8099/1]).
 
 -define(DEFAULT_TIMEOUT, ?t:minutes(2)).
 
-all(doc) -> [];
-all(suite) ->
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
     [otp_8099].
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 init_per_testcase(Case, Config) when is_list(Config) ->
     Dog = ?t:timetrap(?DEFAULT_TIMEOUT),
     [{watchdog, Dog}, {testcase, Case} | Config].
 
-fin_per_testcase(_Case, Config) when is_list(Config) ->
+end_per_testcase(_Case, Config) when is_list(Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog),
     ok.
diff --git a/erts/emulator/test/save_calls_SUITE.erl b/erts/emulator/test/save_calls_SUITE.erl
index b56c4ad0b0..4929031794 100644
--- a/erts/emulator/test/save_calls_SUITE.erl
+++ b/erts/emulator/test/save_calls_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,17 +19,36 @@
 
 -module(save_calls_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2]).
 
 -export([save_calls_1/1,dont_break_reductions/1]).
 
 -export([do_bopp/1, do_bipp/0, do_bepp/0]).
 
-all(suite) ->
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
     [save_calls_1, dont_break_reductions].
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 dont_break_reductions(suite) ->
     [];
 dont_break_reductions(doc) ->
diff --git a/erts/emulator/test/scheduler_SUITE.erl b/erts/emulator/test/scheduler_SUITE.erl
index 06442bfad6..f16d0ea429 100644
--- a/erts/emulator/test/scheduler_SUITE.erl
+++ b/erts/emulator/test/scheduler_SUITE.erl
@@ -1,7 +1,7 @@
 %% 
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2008-2010. All Rights Reserved.
+%% Copyright Ericsson AB 2008-2011. All Rights Reserved.
 %%
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -30,10 +30,12 @@
 
 %-define(line_trace, 1).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 %-compile(export_all).
--export([all/1, init_per_testcase/2, fin_per_testcase/2, end_per_suite/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, end_per_testcase/2, end_per_suite/1]).
 
 -export([equal/1,
 	 few_low/1,
@@ -44,7 +46,7 @@
 	 equal_with_high/1,
 	 equal_with_high_max/1,
 	 bound_process/1,
-	 scheduler_bind/1,
+	
 	 scheduler_bind_types/1,
 	 cpu_topology/1,
 	 update_cpu_info/1,
@@ -57,21 +59,35 @@
 
 -define(MIN_SCHEDULER_TEST_TIMEOUT, ?t:minutes(1)).
 
-all(doc) -> [];
-all(suite) ->
-    [equal,
-     few_low,
-     many_low,
-     equal_with_part_time_high,
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [equal, few_low, many_low, equal_with_part_time_high,
      equal_with_part_time_max,
-     equal_and_high_with_part_time_max,
-     equal_with_high,
-     equal_with_high_max,
-     bound_process,
-     scheduler_bind,
-     scheduler_suspend,
+     equal_and_high_with_part_time_max, equal_with_high,
+     equal_with_high_max, bound_process,
+     {group, scheduler_bind}, scheduler_suspend,
      reader_groups].
 
+groups() -> 
+    [{scheduler_bind, [],
+      [scheduler_bind_types, cpu_topology, update_cpu_info,
+       sct_cmd, sbt_cmd]}].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(Config) ->
+    catch erts_debug:set_internal_state(available_internal_state, false),
+    Config.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 init_per_testcase(Case, Config) when is_list(Config) ->
     Dog = ?t:timetrap(?DEFAULT_TIMEOUT),
     process_flag(priority, max),
@@ -79,15 +95,11 @@ init_per_testcase(Case, Config) when is_list(Config) ->
     OkRes = ok,
     [{watchdog, Dog}, {testcase, Case}, {ok_res, OkRes} |Config].
 
-fin_per_testcase(_Case, Config) when is_list(Config) ->
+end_per_testcase(_Case, Config) when is_list(Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog),
     ok.
 
-end_per_suite(Config) ->
-    catch erts_debug:set_internal_state(available_internal_state, false),
-    Config.
-
 -define(ERTS_RUNQ_CHECK_BALANCE_REDS_PER_SCHED, (2000*2000)).
 -define(DEFAULT_TEST_REDS_PER_SCHED, 200000000).
 
@@ -247,12 +259,6 @@ bound_loop(NS, N, M, Sched) ->
     Sched = erlang:system_info(scheduler_id),
     bound_loop(NS, N-1, M, Sched).
 
-scheduler_bind(suite) ->
-    [scheduler_bind_types,
-     cpu_topology,
-     update_cpu_info,
-     sct_cmd,
-     sbt_cmd].
 
 -define(TOPOLOGY_A_CMD,
 	"+sct"
@@ -856,9 +862,9 @@ get_affinity_mask(Port, Status, Affinity) when Status == unknown;
 	{Port,{exit_status,S}} ->
 	    get_affinity_mask(Port, S, Affinity)
     end;
-get_affinity_mask(Port, Status, bad) ->
+get_affinity_mask(_Port, _Status, bad) ->
     unknown;
-get_affinity_mask(Port, Status, Affinity) ->
+get_affinity_mask(_Port, _Status, Affinity) ->
     Affinity.
 
 get_affinity_mask() ->
@@ -1383,67 +1389,6 @@ reader_groups_map(CPUT, Groups) ->
 %% Utils
 %%
 
-tilera_cpu_topology() ->
-    [{processor,[{node,[{core,{logical,0}},
-			{core,{logical,1}},
-			{core,{logical,2}},
-			{core,{logical,8}},
-			{core,{logical,9}},
-			{core,{logical,10}},
-			{core,{logical,11}},
-			{core,{logical,16}},
-			{core,{logical,17}},
-			{core,{logical,18}},
-			{core,{logical,19}},
-			{core,{logical,24}},
-			{core,{logical,25}},
-			{core,{logical,27}},
-			{core,{logical,29}}]},
-		 {node,[{core,{logical,3}},
-			{core,{logical,4}},
-			{core,{logical,5}},
-			{core,{logical,6}},
-			{core,{logical,7}},
-			{core,{logical,12}},
-			{core,{logical,13}},
-			{core,{logical,14}},
-			{core,{logical,15}},
-			{core,{logical,20}},
-			{core,{logical,21}},
-			{core,{logical,22}},
-			{core,{logical,23}},
-			{core,{logical,28}},
-			{core,{logical,30}}]},
-		 {node,[{core,{logical,31}},
-			{core,{logical,36}},
-			{core,{logical,37}},
-			{core,{logical,38}},
-			{core,{logical,44}},
-			{core,{logical,45}},
-			{core,{logical,46}},
-			{core,{logical,47}},
-			{core,{logical,51}},
-			{core,{logical,52}},
-			{core,{logical,53}},
-			{core,{logical,54}},
-			{core,{logical,55}},
-			{core,{logical,60}},
-			{core,{logical,61}}]},
-		 {node,[{core,{logical,26}},
-			{core,{logical,32}},
-			{core,{logical,33}},
-			{core,{logical,34}},
-			{core,{logical,35}},
-			{core,{logical,39}},
-			{core,{logical,40}},
-			{core,{logical,41}},
-			{core,{logical,42}},
-			{core,{logical,43}},
-			{core,{logical,48}},
-			{core,{logical,49}},
-			{core,{logical,50}},
-			{core,{logical,58}}]}]}].
-
 l(Id) ->
     {logical, Id}.
 
diff --git a/erts/emulator/test/send_term_SUITE.erl b/erts/emulator/test/send_term_SUITE.erl
index 819aa34886..84352f78ad 100644
--- a/erts/emulator/test/send_term_SUITE.erl
+++ b/erts/emulator/test/send_term_SUITE.erl
@@ -19,24 +19,43 @@
 
 -module(send_term_SUITE).
 
--export([all/1,basic/1]).
--export([init_per_testcase/2,fin_per_testcase/2]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,basic/1]).
+-export([init_per_testcase/2,end_per_testcase/2]).
 
 -export([generate_external_terms_files/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog=?t:timetrap(?t:minutes(3)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
-all(suite) ->
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
     [basic].
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 basic(Config) when is_list(Config) ->
     Drv = "send_term_drv",
     ?line P = start_driver(Config, Drv),
diff --git a/erts/emulator/test/sensitive_SUITE.erl b/erts/emulator/test/sensitive_SUITE.erl
index 458275af81..57bc6ce08e 100644
--- a/erts/emulator/test/sensitive_SUITE.erl
+++ b/erts/emulator/test/sensitive_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2007-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2007-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,9 +19,11 @@
 
 -module(sensitive_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
 	 stickiness/1,send_trace/1,recv_trace/1,proc_trace/1,call_trace/1,
 	 meta_trace/1,running_trace/1,gc_trace/1,seq_trace/1,
 	 t_process_info/1,t_process_display/1,save_calls/1]).
@@ -34,14 +36,33 @@ init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog = ?t:timetrap(?t:minutes(5)),
     [{watchdog,Dog}|Config].
 
-fin_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
+end_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
-all(suite) ->
-    [stickiness,send_trace,recv_trace,proc_trace,call_trace,
-     meta_trace,running_trace,gc_trace,seq_trace,
-     t_process_info,t_process_display,save_calls].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [stickiness, send_trace, recv_trace, proc_trace,
+     call_trace, meta_trace, running_trace, gc_trace,
+     seq_trace, t_process_info, t_process_display,
+     save_calls].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
     
 stickiness(Config) when is_list(Config) ->
     ?line {Tracer,Mref} = spawn_monitor(fun() ->
diff --git a/erts/emulator/test/signal_SUITE.erl b/erts/emulator/test/signal_SUITE.erl
index e9103ca3c1..682a9d03fc 100644
--- a/erts/emulator/test/signal_SUITE.erl
+++ b/erts/emulator/test/signal_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2006-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2006-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -30,8 +30,9 @@
 -define(DEFAULT_TIMEOUT_SECONDS, 120).
 
 %-define(line_trace, 1).
--include("test_server.hrl").
--export([all/1]).
+-include_lib("test_server/include/test_server.hrl").
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2]).
 
 % Test cases
 -export([xm_sig_order/1,
@@ -49,38 +50,48 @@
 	 pending_exit_group_leader/1,
 	 exit_before_pending_exit/1]).
 
--export([init_per_testcase/2, fin_per_testcase/2, end_per_suite/1]).
+-export([init_per_testcase/2, end_per_testcase/2]).
 
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     ?line Dog = ?t:timetrap(?t:seconds(?DEFAULT_TIMEOUT_SECONDS)),
     available_internal_state(true),
     ?line [{testcase, Func},{watchdog, Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     ?line Dog = ?config(watchdog, Config),
     ?line ?t:timetrap_cancel(Dog).
 
+init_per_suite(Config) ->
+    Config.
+
 end_per_suite(_Config) ->
     available_internal_state(true),
-    erts_debug:set_internal_state(not_running_optimization, true),
+    catch erts_debug:set_internal_state(not_running_optimization, true),
     available_internal_state(false).
 
-all(suite) ->
-    [xm_sig_order,
-     pending_exit_unlink_process,
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [xm_sig_order, pending_exit_unlink_process,
      pending_exit_unlink_dist_process,
-     pending_exit_unlink_port,
-     pending_exit_trap_exit,
-     pending_exit_receive,
-     pending_exit_trap_exit,
-     pending_exit_gc,
-     pending_exit_is_process_alive,
+     pending_exit_unlink_port, pending_exit_trap_exit,
+     pending_exit_receive, pending_exit_trap_exit,
+     pending_exit_gc, pending_exit_is_process_alive,
      pending_exit_process_display,
      pending_exit_process_info_1,
-     pending_exit_process_info_2,
-     pending_exit_group_leader,
+     pending_exit_process_info_2, pending_exit_group_leader,
      exit_before_pending_exit].
 
+groups() -> 
+    [].
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 xm_sig_order(doc) -> ["Test that exit signals and messages are received "
 		      "in correct order"];
 xm_sig_order(suite) -> [];
diff --git a/erts/emulator/test/statistics_SUITE.erl b/erts/emulator/test/statistics_SUITE.erl
index 898908c40f..b543491471 100644
--- a/erts/emulator/test/statistics_SUITE.erl
+++ b/erts/emulator/test/statistics_SUITE.erl
@@ -21,13 +21,14 @@
 
 %% Tests the statistics/1 bif.
 
--export([all/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
 	 init_per_testcase/2,
-	 fin_per_testcase/2,
-	 wall_clock/1, wall_clock_zero_diff/1, wall_clock_update/1,
-	 runtime/1, runtime_zero_diff/1,
+	 end_per_testcase/2,
+	 wall_clock_zero_diff/1, wall_clock_update/1,
+	 runtime_zero_diff/1,
 	 runtime_update/1, runtime_diff/1,
-	 run_queue/1, run_queue_one/1,
+	 run_queue_one/1,
 	 reductions/1, reductions_big/1, garbage_collection/1, io/1,
 	 badarg/1]).
 
@@ -35,24 +36,47 @@
 
 -export([hog/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 init_per_testcase(_, Config) ->
     ?line Dog = test_server:timetrap(test_server:seconds(300)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_, Config) ->
+end_per_testcase(_, Config) ->
     Dog = ?config(watchdog, Config),
     test_server:timetrap_cancel(Dog),
     ok.
 
-all(suite) -> [wall_clock, runtime, reductions, reductions_big, run_queue,
-	       garbage_collection, io, badarg].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [{group, wall_clock}, {group, runtime}, reductions,
+     reductions_big, {group, run_queue}, garbage_collection,
+     io, badarg].
+
+groups() -> 
+    [{wall_clock, [],
+      [wall_clock_zero_diff, wall_clock_update]},
+     {runtime, [],
+      [runtime_zero_diff, runtime_update, runtime_diff]},
+     {run_queue, [], [run_queue_one]}].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 
 %%% Testing statistics(wall_clock).
 
-wall_clock(suite) -> [wall_clock_zero_diff, wall_clock_update].
 
 
 wall_clock_zero_diff(doc) ->
@@ -99,7 +123,6 @@ wall_clock_update1(0) ->
 
 %%% Test statistics(runtime).
 
-runtime(suite) -> [runtime_zero_diff, runtime_update, runtime_diff].
 
 runtime_zero_diff(doc) ->
     "Tests that the difference between the times returned from two consectuitive "
@@ -225,7 +248,6 @@ reductions_big_loop() ->
 
 %%% Tests of statistics(run_queue).
 
-run_queue(suite) -> [run_queue_one].
 
 run_queue_one(doc) ->
     "Tests that statistics(run_queue) returns 1 if we start a "
diff --git a/erts/emulator/test/system_info_SUITE.erl b/erts/emulator/test/system_info_SUITE.erl
index cd940f3ddf..0293341eac 100644
--- a/erts/emulator/test/system_info_SUITE.erl
+++ b/erts/emulator/test/system_info_SUITE.erl
@@ -30,23 +30,44 @@
 
 %-define(line_trace, 1).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 %-compile(export_all).
--export([all/1, init_per_testcase/2, fin_per_testcase/2]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, end_per_testcase/2]).
 
 -export([process_count/1, system_version/1, misc_smoke_tests/1, heap_size/1, wordsize/1]).
 
 -define(DEFAULT_TIMEOUT, ?t:minutes(2)).
 
-all(doc) -> [];
-all(suite) -> [process_count, system_version, misc_smoke_tests, heap_size, wordsize].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [process_count, system_version, misc_smoke_tests,
+     heap_size, wordsize].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 init_per_testcase(_Case, Config) when is_list(Config) ->
     Dog = ?t:timetrap(?DEFAULT_TIMEOUT),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Case, Config) when is_list(Config) ->
+end_per_testcase(_Case, Config) when is_list(Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog),
     ok.
diff --git a/erts/emulator/test/system_profile_SUITE.erl b/erts/emulator/test/system_profile_SUITE.erl
index 7b0d6d19fe..e4cfa56d88 100644
--- a/erts/emulator/test/system_profile_SUITE.erl
+++ b/erts/emulator/test/system_profile_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2007-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2007-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -22,35 +22,52 @@
 
 -module(system_profile_SUITE).
 
--export([all/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
 	system_profile_on_and_off/1,
 	runnable_procs/1,
 	runnable_ports/1,
 	scheduler/1
         ]).
 
--export([init_per_testcase/2, fin_per_testcase/2]).
+-export([init_per_testcase/2, end_per_testcase/2]).
 
--export([profiler_process/1, ring_loop/1, port_echo_start/0, list_load/0, run_load/2]).
+-export([profiler_process/1, ring_loop/1, port_echo_start/0, 
+	 list_load/0, run_load/2]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 -define(default_timeout, ?t:minutes(1)).
 
 init_per_testcase(_Case, Config) ->
     ?line Dog=?t:timetrap(?default_timeout),
     [{watchdog, Dog}|Config].
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     Dog=?config(watchdog, Config),
     ?t:timetrap_cancel(Dog),
     ok.
 
-all(suite) -> 
-    %% Test specification on test suite level
-    [system_profile_on_and_off,
-    runnable_procs,
-    runnable_ports,
-    scheduler].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [system_profile_on_and_off, runnable_procs,
+     runnable_ports, scheduler].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 %% No specification clause needed for an init function in a conf case!!!
 
diff --git a/erts/emulator/test/time_SUITE.erl b/erts/emulator/test/time_SUITE.erl
index 095e9dd1af..43dccc6ecb 100644
--- a/erts/emulator/test/time_SUITE.erl
+++ b/erts/emulator/test/time_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -29,14 +29,15 @@
 %%	now/0
 %%
 
--export([all/1, univ_to_local/1, local_to_univ/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, univ_to_local/1, local_to_univ/1,
 	 bad_univ_to_local/1, bad_local_to_univ/1,
 	 consistency/1,
-	 now/1, now_unique/1, now_update/1, timestamp/1]).
+	 now_unique/1, now_update/1, timestamp/1]).
 
 -export([local_to_univ_utc/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 -export([linear_time/1]).
 
@@ -54,10 +55,28 @@
 
 -define(dst_timezone, 2).
 
-all(suite) -> [univ_to_local, local_to_univ,
-	       local_to_univ_utc,
-	       bad_univ_to_local, bad_local_to_univ,
-	       consistency, now, timestamp].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [univ_to_local, local_to_univ, local_to_univ_utc,
+     bad_univ_to_local, bad_local_to_univ, consistency,
+     {group, now}, timestamp].
+
+groups() -> 
+    [{now, [], [now_unique, now_update]}].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 local_to_univ_utc(suite) ->
     [];
@@ -283,7 +302,6 @@ repeating_timestamp_check(N) ->
 
 %% Test now/0.
 
-now(suite) -> [now_unique, now_update].
 
 %% Tests that successive calls to now/0 returns different values.
 %% Also returns a comment string with the median difference between
diff --git a/erts/emulator/test/timer_bif_SUITE.erl b/erts/emulator/test/timer_bif_SUITE.erl
index 9ac5afcc45..6c421253af 100644
--- a/erts/emulator/test/timer_bif_SUITE.erl
+++ b/erts/emulator/test/timer_bif_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1998-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1998-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,7 +19,9 @@
 
 -module(timer_bif_SUITE).
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,end_per_suite/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2]).
 -export([start_timer_1/1, send_after_1/1, send_after_2/1, send_after_3/1,
 	 cancel_timer_1/1,
 	 start_timer_big/1, send_after_big/1,
@@ -27,7 +29,7 @@
 	 read_timer_trivial/1, read_timer/1,
 	 cleanup/1, evil_timers/1, registered_process/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 init_per_testcase(_Case, Config) ->
     ?line Dog=test_server:timetrap(test_server:seconds(30)),
@@ -37,19 +39,35 @@ init_per_testcase(_Case, Config) ->
     end,
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     Dog = ?config(watchdog, Config),
     test_server:timetrap_cancel(Dog),
     ok.
 
+init_per_suite(Config) ->
+    Config.
+
 end_per_suite(_Config) ->
     catch erts_debug:set_internal_state(available_internal_state, false).
 
-all(suite) ->
-    [start_timer_1, send_after_1, send_after_2, cancel_timer_1,
-     start_timer_e, send_after_e, cancel_timer_e,
-     start_timer_big, send_after_big, read_timer_trivial, read_timer,
-     cleanup, evil_timers, registered_process].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [start_timer_1, send_after_1, send_after_2,
+     cancel_timer_1, start_timer_e, send_after_e,
+     cancel_timer_e, start_timer_big, send_after_big,
+     read_timer_trivial, read_timer, cleanup, evil_timers,
+     registered_process].
+
+groups() -> 
+    [].
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 start_timer_1(doc) -> ["Basic start_timer/3 functionality"];
 start_timer_1(Config) when is_list(Config) ->
diff --git a/erts/emulator/test/trace_SUITE.erl b/erts/emulator/test/trace_SUITE.erl
index e9713fcf0f..d200fdaf4c 100644
--- a/erts/emulator/test/trace_SUITE.erl
+++ b/erts/emulator/test/trace_SUITE.erl
@@ -23,7 +23,8 @@
 %%% Tests the trace BIF.
 %%%
 
--export([all/1, receive_trace/1, self_send/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, receive_trace/1, self_send/1,
 	 timeout_trace/1, send_trace/1,
 	 procs_trace/1, dist_procs_trace/1,
 	 suspend/1, mutual_suspend/1, suspend_exit/1, suspender_exit/1,
@@ -35,22 +36,39 @@
 	 system_monitor_large_heap_1/1, system_monitor_large_heap_2/1,
 	 bad_flag/1, trace_delivered/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 %%% Internal exports
 -export([process/1]).
 
-all(suite) ->
-    [cpu_timestamp, receive_trace, self_send, timeout_trace, send_trace,
-     procs_trace, dist_procs_trace,
-     suspend, mutual_suspend, suspend_exit, suspender_exit,
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [cpu_timestamp, receive_trace, self_send, timeout_trace,
+     send_trace, procs_trace, dist_procs_trace, suspend,
+     mutual_suspend, suspend_exit, suspender_exit,
      suspend_system_limit, suspend_opts, suspend_waiting,
-     new_clear, existing_clear,
-     set_on_spawn, set_on_first_spawn,
-     system_monitor_args, more_system_monitor_args,
-     system_monitor_long_gc_1, system_monitor_long_gc_2, 
-     system_monitor_large_heap_1, system_monitor_large_heap_2,
-     bad_flag, trace_delivered].
+     new_clear, existing_clear, set_on_spawn,
+     set_on_first_spawn, system_monitor_args,
+     more_system_monitor_args, system_monitor_long_gc_1,
+     system_monitor_long_gc_2, system_monitor_large_heap_1,
+     system_monitor_large_heap_2, bad_flag, trace_delivered].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 
 %% No longer testing anything, just reporting whether cpu_timestamp
diff --git a/erts/emulator/test/trace_bif_SUITE.erl b/erts/emulator/test/trace_bif_SUITE.erl
index 3f91f8dc08..263db065b3 100644
--- a/erts/emulator/test/trace_bif_SUITE.erl
+++ b/erts/emulator/test/trace_bif_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1998-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1998-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,24 +19,44 @@
 
 -module(trace_bif_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1]).
--export([trace_bif/1, trace_bif_timestamp/1, trace_on_and_off/1, trace_bif_local/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2]).
+-export([trace_bif/1, trace_bif_timestamp/1, trace_on_and_off/1, 
+	 trace_bif_local/1,
 	 trace_bif_timestamp_local/1, trace_bif_return/1, not_run/1,
 	 trace_info_old_code/1]).
 
 -export([bif_process/0]).
 
-all(suite) ->
-    case test_server:is_native(?MODULE) of
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    case test_server:is_native(trace_bif_SUITE) of
 	true -> [not_run];
 	false ->
 	    [trace_bif, trace_bif_timestamp, trace_on_and_off,
-	     trace_bif_local, trace_bif_timestamp_local, 
+	     trace_bif_local, trace_bif_timestamp_local,
 	     trace_bif_return, trace_info_old_code]
     end.
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 not_run(Config) when is_list(Config) -> 
     {skipped,"Native code"}.
 
diff --git a/erts/emulator/test/trace_call_count_SUITE.erl b/erts/emulator/test/trace_call_count_SUITE.erl
index 07aa7c8d8d..55d9b2b288 100644
--- a/erts/emulator/test/trace_call_count_SUITE.erl
+++ b/erts/emulator/test/trace_call_count_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2002-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2002-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -42,7 +42,7 @@
 -define(config(A,B),config(A,B)).
 -export([config/2]).
 -else.
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 -endif.
  
 -ifdef(debug).
@@ -62,7 +62,9 @@ config(priv_dir,_) ->
     ".".
 -else.
 %% When run in test server.
--export([all/1, init_per_testcase/2, fin_per_testcase/2, not_run/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, end_per_testcase/2, not_run/1]).
 -export([basic/1, on_and_off/1, info/1, 
 	 pause_and_restart/1, combo/1]).
 	 
@@ -70,7 +72,7 @@ init_per_testcase(_Case, Config) ->
     ?line Dog=test_server:timetrap(test_server:seconds(30)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     erlang:trace_pattern({'_','_','_'}, false, [local,meta,call_count]),
     erlang:trace_pattern(on_load, false, [local,meta,call_count]),
     erlang:trace(all, false, [all]),
@@ -78,15 +80,31 @@ fin_per_testcase(_Case, Config) ->
     test_server:timetrap_cancel(Dog),
     ok.
 
-all(doc) ->
-    ["Test call count tracing of local function calls."];
-all(suite) ->
-    case test_server:is_native(?MODULE) of
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    case test_server:is_native(trace_call_count_SUITE) of
 	true -> [not_run];
-	false -> [basic, on_and_off, info, 
-		  pause_and_restart, combo]
+	false ->
+	    [basic, on_and_off, info, pause_and_restart, combo]
     end.
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 not_run(Config) when is_list(Config) -> 
     {skipped,"Native code"}.
 
diff --git a/erts/emulator/test/trace_call_time_SUITE.erl b/erts/emulator/test/trace_call_time_SUITE.erl
index 7bc91addde..5dfa87bbee 100644
--- a/erts/emulator/test/trace_call_time_SUITE.erl
+++ b/erts/emulator/test/trace_call_time_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %%
-%% Copyright Ericsson AB 2010. All Rights Reserved.
+%% Copyright Ericsson AB 2011. All Rights Reserved.
 %%
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -57,12 +57,15 @@
 
 %% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 %% When run in test server.
--export([all/1, init_per_testcase/2, fin_per_testcase/2, not_run/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, end_per_testcase/2, not_run/1]).
 -export([basic/1, on_and_off/1, info/1,
-	 pause_and_restart/1, scheduling/1, called_function/1, combo/1, bif/1, nif/1]).
+	 pause_and_restart/1, scheduling/1, called_function/1, combo/1, 
+	 bif/1, nif/1]).
 
 init_per_testcase(_Case, Config) ->
     ?line Dog=test_server:timetrap(test_server:seconds(400)),
@@ -71,7 +74,7 @@ init_per_testcase(_Case, Config) ->
     timer:now_diff(now(),now()),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     erlang:trace_pattern({'_','_','_'}, false, [local,meta,call_time,call_count]),
     erlang:trace_pattern(on_load, false, [local,meta,call_time,call_count]),
     erlang:trace(all, false, [all]),
@@ -79,15 +82,32 @@ fin_per_testcase(_Case, Config) ->
     test_server:timetrap_cancel(Dog),
     ok.
 
-all(doc) ->
-    ["Test call count tracing of local function calls."];
-all(suite) ->
-    case test_server:is_native(?MODULE) of
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    case test_server:is_native(trace_call_time_SUITE) of
 	true -> [not_run];
-	false -> [basic, on_and_off, info,
-		  pause_and_restart, scheduling, combo, bif, nif, called_function]
+	false ->
+	    [basic, on_and_off, info, pause_and_restart, scheduling,
+	     combo, bif, nif, called_function]
     end.
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 not_run(Config) when is_list(Config) ->
     {skipped,"Native code"}.
 
@@ -407,7 +427,7 @@ nif(Config) when is_list(Config) ->
     ?line 1 = erlang:trace_pattern({?MODULE, nif_dec,  '_'}, true, [call_time]),
     ?line 1 = erlang:trace_pattern({?MODULE, with_nif, '_'}, true, [call_time]),
     ?line Pid = setup(),
-    ?line {L, T1} = execute(Pid, fun() -> with_nif(M) end),
+    ?line {_, T1} = execute(Pid, fun() -> with_nif(M) end),
 
     % the nif is called M - 1 times, the last time the function with 'with_nif'
     % returns ok and does not call the nif.
@@ -486,7 +506,7 @@ with_nif(N) ->
     with_nif(?MODULE:nif_dec(N)).
 
 
-nif_dec(N) -> 0.
+nif_dec(_) -> 0.
 
 dec(N) ->
     loaded(10000),
diff --git a/erts/emulator/test/trace_local_SUITE.erl b/erts/emulator/test/trace_local_SUITE.erl
index 24005774ba..091e960610 100644
--- a/erts/emulator/test/trace_local_SUITE.erl
+++ b/erts/emulator/test/trace_local_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2000-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2000-2011. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -45,7 +45,7 @@
 -export([config/2]).
 -define(DEFAULT_RECEIVE_TIMEOUT, 1000).
 -else.
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 -define(DEFAULT_RECEIVE_TIMEOUT, infinity).
 -endif.
  
@@ -68,7 +68,8 @@ config(priv_dir,_) ->
 
 %%% When run in test server %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
--export([all/1, basic/1, bit_syntax/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, basic/1, bit_syntax/1,
 	 return/1, on_and_off/1, stack_grow/1,info/1, delete/1,
 	 exception/1, exception_apply/1,
 	 exception_function/1, exception_apply_function/1,
@@ -79,34 +80,51 @@ config(priv_dir,_) ->
 	 exception_meta_nocatch/1, exception_meta_nocatch_apply/1,
 	 exception_meta_nocatch_function/1,
 	 exception_meta_nocatch_apply_function/1,
-	 init_per_testcase/2, fin_per_testcase/2]).
+	 init_per_testcase/2, end_per_testcase/2]).
 init_per_testcase(_Case, Config) ->
     ?line Dog=test_server:timetrap(test_server:minutes(2)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     shutdown(),
     Dog=?config(watchdog, Config),
     test_server:timetrap_cancel(Dog),
     ok.
-all(doc) ->
-    ["Test tracing of local function calls and return traces."];
-all(suite) ->
-    case test_server:is_native(?MODULE) of
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    case test_server:is_native(trace_local_SUITE) of
 	true -> [not_run];
-	false -> [basic, bit_syntax, return, on_and_off, stack_grow, info, delete,
-		  exception, exception_apply,
-		  exception_function, exception_apply_function,
-		  exception_nocatch, exception_nocatch_apply,
-		  exception_nocatch_function, 
-		  exception_nocatch_apply_function,
-		  exception_meta, exception_meta_apply,
-		  exception_meta_function, exception_meta_apply_function,
-		  exception_meta_nocatch, exception_meta_nocatch_apply,
-		  exception_meta_nocatch_function,
-		  exception_meta_nocatch_apply_function]
+	false ->
+	    [basic, bit_syntax, return, on_and_off, stack_grow,
+	     info, delete, exception, exception_apply,
+	     exception_function, exception_apply_function,
+	     exception_nocatch, exception_nocatch_apply,
+	     exception_nocatch_function,
+	     exception_nocatch_apply_function, exception_meta,
+	     exception_meta_apply, exception_meta_function,
+	     exception_meta_apply_function, exception_meta_nocatch,
+	     exception_meta_nocatch_apply,
+	     exception_meta_nocatch_function,
+	     exception_meta_nocatch_apply_function]
     end.
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 not_run(Config) when is_list(Config) -> 
     {skipped,"Native code"}.
 
@@ -796,9 +814,6 @@ loop(D1,D2,D3,0) ->
 loop(D1,D2,D3,N) ->
     max(N,loop(D1,D2,D3,N-1)).
 
-max(A, B) when A > B -> A;
-max(_, B) -> B.
-
 exported_wrap(Val) ->
     exported(Val).
 
diff --git a/erts/emulator/test/trace_meta_SUITE.erl b/erts/emulator/test/trace_meta_SUITE.erl
index d84cb3cdf2..45987cc319 100644
--- a/erts/emulator/test/trace_meta_SUITE.erl
+++ b/erts/emulator/test/trace_meta_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2002-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2002-2011. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -45,7 +45,7 @@
 -define(config(A,B),config(A,B)).
 -export([config/2]).
 -else.
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 -endif.
  
 -ifdef(debug).
@@ -65,7 +65,9 @@ config(priv_dir,_) ->
     ".".
 -else.
 %% When run in test server.
--export([all/1, init_per_testcase/2, fin_per_testcase/2, not_run/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, end_per_testcase/2, not_run/1]).
 -export([basic/1, return/1, on_and_off/1, stack_grow/1, 
 	 info/1, tracer/1, combo/1, nosilent/1]).
 	 
@@ -73,19 +75,36 @@ init_per_testcase(_Case, Config) ->
     ?line Dog=test_server:timetrap(test_server:minutes(5)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     shutdown(),
     Dog=?config(watchdog, Config),
     test_server:timetrap_cancel(Dog),
     ok.
-all(doc) ->
-    ["Test meta tracing of local function calls and return trace."];
-all(suite) ->
-    case test_server:is_native(?MODULE) of
-	true -> [not_run];
-	false -> [basic, return, on_and_off, stack_grow, 
-		  info, tracer, combo, nosilent]
-    end.
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+case test_server:is_native(trace_meta_SUITE) of
+  true -> [not_run];
+  false ->
+      [basic, return, on_and_off, stack_grow, info, tracer,
+       combo, nosilent]
+end.
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+	Config.
+
+end_per_group(_GroupName, Config) ->
+	Config.
+
 
 not_run(Config) when is_list(Config) -> 
     {skipped,"Native code"}.
@@ -594,11 +613,6 @@ loop(D1,D2,D3,0) ->
 loop(D1,D2,D3,N) ->
     max(N,loop(D1,D2,D3,N-1)).
 
-max(A,B) when A > B ->
-    A;
-max(_A,B) ->
-    B.
-
 id(X) ->
     X.
 
diff --git a/erts/emulator/test/trace_nif_SUITE.erl b/erts/emulator/test/trace_nif_SUITE.erl
index 587cc08979..a52ee15e0e 100644
--- a/erts/emulator/test/trace_nif_SUITE.erl
+++ b/erts/emulator/test/trace_nif_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2009. All Rights Reserved.
+%% Copyright Ericsson AB 2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -19,9 +19,10 @@
 
 -module(trace_nif_SUITE).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
--export([all/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2]).
 -export([trace_nif/1,
 	 trace_nif_timestamp/1,
 	 trace_nif_local/1,
@@ -32,19 +33,33 @@
 
 -export([nif_process/0, nif/0, nif/1]).
 
-all(suite) ->
-    case test_server:is_native(?MODULE) of
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    case test_server:is_native(trace_nif_SUITE) of
 	true -> [not_run];
 	false ->
-	    [trace_nif,
- 	     trace_nif_timestamp,
-	     trace_nif_local,
-	     trace_nif_meta,
-	     trace_nif_timestamp_local,
- 	     trace_nif_return
-	    ]
+	    [trace_nif, trace_nif_timestamp, trace_nif_local,
+	     trace_nif_meta, trace_nif_timestamp_local,
+	     trace_nif_return]
     end.
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 not_run(Config) when is_list(Config) -> 
     {skipped,"Native code"}.
 
diff --git a/erts/emulator/test/trace_port_SUITE.erl b/erts/emulator/test/trace_port_SUITE.erl
index 5febe177f9..d94fc0aa20 100644
--- a/erts/emulator/test/trace_port_SUITE.erl
+++ b/erts/emulator/test/trace_port_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1999-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1999-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -20,7 +20,9 @@
 
 -module(trace_port_SUITE).
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
 	 call_trace/1,
 	 return_trace/1,
 	 send/1,
@@ -34,29 +36,42 @@
 	 gc/1,
 	 default_tracer/1]).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
-test_cases() ->
-    [call_trace,
-     return_trace,
-     send,
-     receive_trace,
-     process_events,
-     schedule,
-     fake_schedule,
+test_cases() -> 
+    [call_trace, return_trace, send, receive_trace,
+     process_events, schedule, fake_schedule,
      fake_schedule_after_register,
      fake_schedule_after_getting_linked,
-     fake_schedule_after_getting_unlinked,
-     gc,
+     fake_schedule_after_getting_unlinked, gc,
      default_tracer].
 
-all(suite) -> test_cases().
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    test_cases().
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 init_per_testcase(Func, Config) when is_atom(Func), is_list(Config) ->
     Dog = ?t:timetrap(?t:seconds(30)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog).
 
diff --git a/erts/emulator/test/tuple_SUITE.erl b/erts/emulator/test/tuple_SUITE.erl
index c4edb16d68..bfc3910742 100644
--- a/erts/emulator/test/tuple_SUITE.erl
+++ b/erts/emulator/test/tuple_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 1997-2009. All Rights Reserved.
+%% Copyright Ericsson AB 1997-2011. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -17,11 +17,13 @@
 %% %CopyrightEnd%
 %%
 -module(tuple_SUITE).
--export([all/1, t_size/1, t_tuple_size/1, t_element/1, t_setelement/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 t_size/1, t_tuple_size/1, t_element/1, t_setelement/1,
 	 t_list_to_tuple/1, t_tuple_to_list/1,
 	 t_make_tuple_2/1, t_make_tuple_3/1, t_append_element/1,
 	 build_and_match/1, tuple_with_case/1, tuple_in_guard/1]).
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 %% Tests tuples and the BIFs:
 %%
@@ -33,13 +35,30 @@
 %% make_tuple/2
 %%
 
-all(suite) ->
-    [build_and_match, t_size, t_tuple_size,
-     t_list_to_tuple, t_tuple_to_list,
-     t_element, t_setelement, t_make_tuple_2,
-     t_make_tuple_3, t_append_element,
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [build_and_match, t_size, t_tuple_size, t_list_to_tuple,
+     t_tuple_to_list, t_element, t_setelement,
+     t_make_tuple_2, t_make_tuple_3, t_append_element,
      tuple_with_case, tuple_in_guard].
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 build_and_match(Config) when is_list(Config) ->
     ?line {} = id({}),
     ?line {1} = id({1}),
@@ -80,7 +99,7 @@ t_tuple_size(Config) when is_list(Config) ->
 
 ludicrous_tuple_size(T)
   when tuple_size(T) =:= 16#7777777777777777777777777777777777 -> ok;
-ludicrous_tuple_size(T) -> error.
+ludicrous_tuple_size(_) -> error.
 
 %% Tests element/2.
 
diff --git a/erts/emulator/test/z_SUITE.erl b/erts/emulator/test/z_SUITE.erl
index 67d2b288a2..9637ecd87e 100644
--- a/erts/emulator/test/z_SUITE.erl
+++ b/erts/emulator/test/z_SUITE.erl
@@ -1,7 +1,7 @@
 %%
 %% %CopyrightBegin%
 %% 
-%% Copyright Ericsson AB 2006-2009. All Rights Reserved.
+%% Copyright Ericsson AB 2006-2010. All Rights Reserved.
 %% 
 %% The contents of this file are subject to the Erlang Public License,
 %% Version 1.1, (the "License"); you may not use this file except in
@@ -29,10 +29,12 @@
 
 %-define(line_trace, 1).
 
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 
 %-compile(export_all).
--export([all/1, init_per_testcase/2, fin_per_testcase/2]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, init_per_testcase/2, 
+	 end_per_testcase/2]).
 
 -export([schedulers_alive/1, node_container_refc_check/1,
 	 long_timers/1, pollset_size/1,
@@ -40,19 +42,33 @@
 
 -define(DEFAULT_TIMEOUT, ?t:minutes(5)).
 
-all(doc) -> [];
-all(suite) ->
-    [schedulers_alive,
-     node_container_refc_check,
-     long_timers,
-     pollset_size,
-     check_io_debug].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [schedulers_alive, node_container_refc_check,
+     long_timers, pollset_size, check_io_debug].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 init_per_testcase(_Case, Config) when is_list(Config) ->
     Dog = ?t:timetrap(?DEFAULT_TIMEOUT),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Case, Config) when is_list(Config) ->
+end_per_testcase(_Case, Config) when is_list(Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog),
     ok.
diff --git a/erts/emulator/utils/beam_makeops b/erts/emulator/utils/beam_makeops
index de19a2e35b..e7c57142c0 100755
--- a/erts/emulator/utils/beam_makeops
+++ b/erts/emulator/utils/beam_makeops
@@ -27,6 +27,7 @@ my $outdir = ".";		# Directory for output files.
 my $verbose = 0;
 my $hot = 1;
 my $num_file_opcodes = 0;
+my $wordsize = 32;
 
 # This is shift counts and mask for the packer.
 my $WHOLE_WORD = '';
@@ -36,12 +37,20 @@ my @pack_mask;
 
 $pack_instr[2] = ['6', 'i'];
 $pack_instr[3] = ['0', '0', 'i'];
+$pack_instr[4] = ['6', '6', '6', 'i']; # Only for 64 bit wordsize
 
 $pack_shift[2] = ['0', 'BEAM_LOOSE_SHIFT'];
 $pack_shift[3] = ['0', 'BEAM_TIGHT_SHIFT', '(2*BEAM_TIGHT_SHIFT)'];
+$pack_shift[4] = ['0', 'BEAM_LOOSE_SHIFT', # Only for 64 bit wordsize
+		  '(2*BEAM_LOOSE_SHIFT)',
+		  '(3*BEAM_LOOSE_SHIFT)'];
 
 $pack_mask[2]  = ['BEAM_LOOSE_MASK', $WHOLE_WORD];
 $pack_mask[3]  = ['BEAM_TIGHT_MASK', 'BEAM_TIGHT_MASK', 'BEAM_TIGHT_MASK'];
+$pack_mask[4]  = ['BEAM_LOOSE_MASK', # Only for 64 bit wordsize
+		  'BEAM_LOOSE_MASK',
+		  'BEAM_LOOSE_MASK',
+		  $WHOLE_WORD];
 
 # There are two types of instructions: generic and specific.
 # The generic instructions are those generated by the Beam compiler.
@@ -80,6 +89,8 @@ my %cold_code;
 my @unnumbered_generic;
 my %unnumbered;
 
+my %is_transformed;
+
 #
 # Code transformations.
 #
@@ -118,7 +129,8 @@ my %arg_size = ('r' => 0,	# x(0) - x register zero
 		't' => 1,	# untagged integer -- can be packed
 		'b' => 1,	# pointer to bif
 		'A' => 1,	# arity value
-		'P' => 1,	# byte offset into tuple
+		'P' => 1,	# byte offset into tuple or stack
+		'Q' => 1,	# like 'P', but packable
 		'h' => 1,	# character
 		'l' => 1,	# float reg
 		'q' => 1,	# literal term
@@ -157,6 +169,7 @@ my @tag_type;
     $type_bit{'U'} = $type_bit{'u'};
     $type_bit{'e'} = $type_bit{'u'};
     $type_bit{'P'} = $type_bit{'u'};
+    $type_bit{'Q'} = $type_bit{'u'};
 }
 
 #
@@ -169,6 +182,7 @@ while (@ARGV && $ARGV[0] =~ /^-(.*)/) {
     ($target = \&emulator_output), next if /^emulator/;
     ($target = \&compiler_output), next if /^compiler/;
     ($outdir = shift), next if /^outdir/;
+    ($wordsize = shift), next if /^wordsize/;
     ($verbose = 1), next if /^v/;
     die "$0: Bad option: -$_\n";
 }
@@ -474,8 +488,9 @@ sub emulator_output {
 		$gen_transform_offset{$key} : -1;
 	    my($spec_op) = $gen_to_spec{$key};
 	    my($num_specific) = $num_specific{$key};
-	    defined $spec_op or $tr != -1 or
+	    defined $spec_op or
 		$obsolete[$gen_opnum{$name,$arity}] or
+		$is_transformed{$name,$arity} or
 		error("instruction $key has no specific instruction");
 	    $spec_op = -1 unless defined $spec_op;
 	    &init_item($name, $arity, $spec_op, $num_specific, $tr, $min_window{$key});
@@ -498,12 +513,14 @@ sub emulator_output {
     print "#define NUM_SPECIFIC_OPS ", scalar(@op_to_name), "\n";
     print "\n";
     print "#ifdef ARCH_64\n";
+    print "#  define BEAM_WIDE_MASK 0xFFFFUL\n";
     print "#  define BEAM_LOOSE_MASK 0x1FFFUL\n";
     print "#if HALFWORD_HEAP\n";
     print "#  define BEAM_TIGHT_MASK 0x1FFCUL\n";
     print "#else\n";
     print "#  define BEAM_TIGHT_MASK 0x1FF8UL\n";
     print "#endif\n";
+    print "#  define BEAM_WIDE_SHIFT 32\n";
     print "#  define BEAM_LOOSE_SHIFT 16\n";
     print "#  define BEAM_TIGHT_SHIFT 16\n";
     print "#else\n";
@@ -796,6 +813,7 @@ sub basic_generator {
 		     'I' => 1,
 		     't' => 1,
 		     'P' => 1,
+		     'Q' => 1,
 		     );
 
     # Pick up the macro to use and its flags (if any).
@@ -916,7 +934,18 @@ sub basic_generator {
 	$var_decls .= "BeamInstr tmp_packed2;"
 	    if $macro_code =~ /tmp_packed2/;
 	if ($flags =~ /-nonext/) {
-	    $code = "$macro_code\n";
+	    $code = join("\n",
+			 "{ $var_decls",
+			 $macro_code,
+			 "}");
+	} elsif ($flags =~ /-goto:(\S*)/) {
+	    my $goto = $1;
+	    $code = join("\n",
+			 "{ $var_decls",
+			 $macro_code,
+			 "I += $size + 1;",
+			 "goto $goto;",
+			 "}");
 	} else {
 	    $code = join("\n",
 			 "{ $var_decls",
@@ -935,18 +964,31 @@ sub basic_generator {
 
 sub do_pack {
     my(@args) = @_;
-    my($i);
     my($packable_args) = 0;
+    my @is_packable;		# Packability (boolean) for each argument.
+    my $wide_packing = 0;
 
     #
     # Count the number of packable arguments.  If we encounter any 's' or 'd'
     # arguments, packing is not possible.
     #
-    for ($i = 0; $i < @args; $i++) {
-	if ($args[$i] =~ /[xyt]/) {
+    my $packable_types = "xytQ";
+    foreach my $arg (@args) {
+	if ($arg =~ /^[$packable_types]/) {
 	    $packable_args++;
-	} elsif ($args[$i] =~ /[sd]/) {
+	    push @is_packable, 1;
+	} elsif ($arg =~ /^I/ and $wordsize == 64 and $packable_args < 2) {
+	    $wide_packing = 1;
+	    push @is_packable, 1;
+	    if (++$packable_args == 2) {
+		# We can only pack two arguments. Turn off packing
+		# for the rest of the arguments.
+		$packable_types = "\xFF";
+	    }
+	} elsif ($arg =~ /^[sd]/) {
 	    return ('', '', @args);
+	} else {
+	    push @is_packable, 0;
 	}
     }
 
@@ -962,10 +1004,27 @@ sub do_pack {
 				# beginning).
     my($up) = '';		# Pack commands (storing back while
 				# moving forward).
-    my($args_per_word) = $packable_args < 4 ? $packable_args : 2;
-    my(@shift) = @{$pack_shift[$args_per_word]};
-    my(@mask) = @{$pack_mask[$args_per_word]};
-    my(@pack_instr) = @{$pack_instr[$args_per_word]};
+    my $args_per_word;
+    if ($packable_args < 4 or $wordsize == 64) {
+	$args_per_word = $packable_args;
+    } else {
+	# 4 packable argument, 32 bit wordsize. Need 2 words.
+	$args_per_word = 2;
+    }
+
+    my @shift;
+    my @mask;
+    my @instr;
+
+    if ($wide_packing) {
+	@shift = ('0', 'BEAM_WIDE_SHIFT');
+	@mask = ('BEAM_WIDE_MASK', $WHOLE_WORD);
+	@instr = ('w', 'i');
+    } else {
+	@shift = @{$pack_shift[$args_per_word]};
+	@mask = @{$pack_mask[$args_per_word]};
+	@instr = @{$pack_instr[$args_per_word]};
+    }
 
     #
     # Now generate the packing instructions.  One complication is that
@@ -979,10 +1038,10 @@ sub do_pack {
     my($ap) = 0;		# Argument number within word.
     my($tmpnum) = 1;		# Number of temporary variable.
     my($expr) = '';
-    for ($i = 0; $i < @args; $i++) {
+    for (my $i = 0; $i < @args; $i++) {
 	my($reg) = $args[$i];
 	my($this_size) = $arg_size{$reg};
-	if ($reg =~ /[xyt]/) {
+	if ($is_packable[$i]) {
 	    $this_size = 0;
 	    $did_some_packing = 1;
 
@@ -993,7 +1052,7 @@ sub do_pack {
 		$this_size = 1;
 	    }
 
-	    $down = "$pack_instr[$ap]$down";
+	    $down = "$instr[$ap]$down";
 	    my($unpack) = &make_unpack($tmpnum, $shift[$ap], $mask[$ap]);
 	    $args[$i] = "pack:$this_size:$reg" . "b($unpack)";
 
@@ -1103,6 +1162,10 @@ sub compile_transform {
     if ($obsolete[$gen_opnum{$name,$arity}]) {
 	error("obsolete function must not be used in transformations");
     }
+
+    if ($src) {
+	$is_transformed{$name,$arity} = 1;
+    }
     
     [$name,$arity,@ops];
 }
@@ -1291,13 +1354,28 @@ sub tr_gen_from {
 	    my($var, $type, $type_val, $cond, $val) = @$op;
 
 	    if ($type ne '' && $type ne '*') {
-		my($types) = '';
-		my($type_mask) = 0;
-		foreach (split('', $type)) {
-		    $types .= "$_ ";
-		    $type_mask |= $type_bit{$_};
+		#
+		# The is_bif, is_not_bif, and is_func instructions have
+		# their own built-in type test and don't need to
+		# be guarded with a type test instruction.
+		#
+		unless ($cond eq 'is_bif' or
+			$cond eq 'is_not_bif' or
+			$cond eq 'is_func') {
+		    my($types) = '';
+		    my($type_mask) = 0;
+		    foreach (split('', $type)) {
+			$types .= "$_ ";
+			$type_mask |= $type_bit{$_};
+		    }
+		    if ($cond ne 'is_eq') {
+			push(@code, &make_op($types, 'is_type', $type_mask));
+		    } else {
+			$cond = '';
+			push(@code, &make_op($types, 'is_type_eq',
+					     $type_mask, $val));
+		    }
 		}
-		push(@code, &make_op($types, 'is_type', $type_mask));
 	    }
 
 	    if ($cond eq 'is_func') {
diff --git a/erts/emulator/utils/count b/erts/emulator/utils/count
new file mode 100755
index 0000000000..617f5c25e8
--- /dev/null
+++ b/erts/emulator/utils/count
@@ -0,0 +1,127 @@
+%% -*- erlang -*-
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 1998-2010. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+-mode(compile).
+
+main(_) ->
+    DisDir = "./dis",
+    ok = filelib:ensure_dir(filename:join(DisDir, "dummy")),
+    io:format("Dissambling to ~s\n", [DisDir]),
+    ok = file:set_cwd(DisDir),
+    Path = code:get_path() -- ["."],
+    Beams0 = [filelib:wildcard(filename:join(Dir, "*.beam")) ||
+		 Dir <- Path],
+    Beams = lists:append(Beams0),
+    Mods0 = [list_to_atom(filename:rootname(filename:basename(F))) ||
+	       F <- Beams],
+    Mods = lists:usort(Mods0),
+    start_sem(),
+    Ps = [begin
+	      {_,Ref} = spawn_monitor(fun() -> count(M) end),
+	      Ref
+	  end || M <- Mods],
+    [put(list_to_atom(I), 0) || I <- erts_debug:instructions()],
+    Res = wait_for_all(Ps, 1),
+    OutFile = "count",
+    {ok,Out} = file:open(OutFile, [write]),
+    [io:format(Out, "~s ~p\n", [I,C]) || {I,C} <- Res],
+    ok = file:close(Out),
+    io:format("\nResult written to ~s\n",
+	      [filename:join(DisDir, OutFile)]),
+    ok.
+
+wait_for_all([], _) ->
+    lists:reverse(lists:keysort(2, get()));
+wait_for_all([_|_]=Ps, I) ->
+    receive
+	{'DOWN',Ref,process,_,Result} ->
+	    io:format("\r~p", [I]),
+	    [increment(Key, Count) || {Key,Count} <- Result],
+	    wait_for_all(Ps -- [Ref], I+1)
+    end.
+
+count(M) ->
+    down(),
+    erts_debug:df(M),
+    {ok,Fd} = file:open(atom_to_list(M) ++ ".dis", [read,raw]),
+    count_is(Fd),
+    ok = file:close(Fd),
+    exit(get()).
+
+count_is(Fd) ->
+    case file:read_line(Fd) of
+	{ok,Line} ->
+	    count_instr(Line),
+	    count_is(Fd);
+	eof ->
+	    ok
+    end.
+
+count_instr([$\s|T]) ->
+    count_instr_1(T, []);
+count_instr([_|T]) ->
+    count_instr(T);
+count_instr([]) ->
+    %% Empty line.
+    ok.
+
+count_instr_1([$\s|_], Acc) ->
+    Instr = list_to_atom(lists:reverse(Acc)),
+    increment(Instr, 1);
+count_instr_1([H|T], Acc) ->
+    count_instr_1(T, [H|Acc]).
+
+increment(Key, Inc) -> 
+    case get(Key) of
+	undefined ->
+	    put(Key, Inc);
+	Count ->
+	    put(Key, Count+Inc)
+    end.
+
+%%%
+%%% Counting sempahore to limit the number of processes that
+%%% can run concurrently.
+%%%
+
+down() ->
+    sem ! {down,self()},
+    receive
+	sem_taken -> ok
+    end.
+
+start_sem() ->	    
+    spawn(fun() ->
+		  register(sem, self()),
+		  process_flag(trap_exit, true),
+		  do_sem(erlang:system_info(schedulers)+1) end).
+
+do_sem(0) ->
+    receive
+	{'EXIT',_,_} ->
+	    do_sem(1)
+    end;
+do_sem(C) ->
+    receive
+	{down,Pid} ->
+	    link(Pid),
+	    Pid ! sem_taken,
+	    do_sem(C-1)
+    end.
diff --git a/erts/emulator/utils/loaded b/erts/emulator/utils/loaded
new file mode 100644
index 0000000000..d124a64a78
--- /dev/null
+++ b/erts/emulator/utils/loaded
@@ -0,0 +1,44 @@
+%% -*- erlang -*-
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 1998-2011. All Rights Reserved.
+%%
+%% The contents of this file are subject to the Erlang Public License,
+%% Version 1.1, (the "License"); you may not use this file except in
+%% compliance with the License. You should have received a copy of the
+%% Erlang Public License along with this software. If not, it can be
+%% retrieved online at http://www.erlang.org/.
+%%
+%% Software distributed under the License is distributed on an "AS IS"
+%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
+%% the License for the specific language governing rights and limitations
+%% under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+%% Run like:
+%%   $ERL_TOP/bin/escript erts/emulator/utils/loaded
+
+-mode(compile).
+
+main(_) ->
+    LibDir = code:lib_dir(),
+    io:format("Library root is ~s\n", [LibDir]),
+    Wc = filename:join(LibDir, "*/ebin/*.beam"),
+    Beams = filelib:wildcard(Wc),
+    BeamFileSize = lists:sum([filelib:file_size(Beam) || Beam <- Beams]),
+    io:format("~w BEAM files containing ~w bytes\n",
+	      [length(Beams),BeamFileSize]),
+    Ms = [list_to_atom(filename:rootname(filename:basename(Beam))) ||
+	     Beam <- Beams],
+    [{module,_} = code:ensure_loaded(M) || M <- Ms],
+    <<"Current code: ",T/binary>> = erlang:system_info(loaded),
+    Digits = grab_digits(T),
+    io:format("~w modules comprising ~s words when loaded\n",
+	      [length(Ms),Digits]).
+
+grab_digits(<<H,T/binary>>) when $0 =< H, H =< $9 ->
+    [H|grab_digits(T)];
+grab_digits(<<$\n,_/binary>>) -> [].
diff --git a/erts/epmd/src/epmd_srv.c b/erts/epmd/src/epmd_srv.c
index ef471a473a..3499ab2934 100644
--- a/erts/epmd/src/epmd_srv.c
+++ b/erts/epmd/src/epmd_srv.c
@@ -2,7 +2,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1998-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1998-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -157,8 +157,10 @@ void run(EpmdVars *g)
 
   dbg_printf(g,2,"starting");
 
-  listen(listensock, SOMAXCONN);
-
+  if(listen(listensock, SOMAXCONN) < 0) {
+      dbg_perror(g,"failed to listen on socket");
+      epmd_cleanup_exit(g,1);
+  }
 
   FD_ZERO(&g->orig_read_mask);
   FD_SET(listensock,&g->orig_read_mask);
diff --git a/erts/epmd/test/epmd.spec b/erts/epmd/test/epmd.spec
index 0e2496bc72..e72272cf94 100644
--- a/erts/epmd/test/epmd.spec
+++ b/erts/epmd/test/epmd.spec
@@ -1 +1 @@
-{topcase, {dir, "../epmd_test"}}.
+{suites,"../epmd_test",all}.
diff --git a/erts/epmd/test/epmd_SUITE.erl b/erts/epmd/test/epmd_SUITE.erl
index da69412e12..ec566f817b 100644
--- a/erts/epmd/test/epmd_SUITE.erl
+++ b/erts/epmd/test/epmd_SUITE.erl
@@ -17,7 +17,7 @@
 %% %CopyrightEnd%
 %%
 -module(epmd_SUITE).
--include("test_server.hrl").
+-include_lib("test_server/include/test_server.hrl").
 -include_lib("kernel/include/file.hrl").
 
 
@@ -35,7 +35,9 @@
 -record(node_info, {port, node_type, prot, lvsn, hvsn, node_name, extra}).
 
 % Test server specific exports
--export([all/1, init_per_testcase/2, fin_per_testcase/2]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, end_per_testcase/2]).
 
 -export(
    [
@@ -64,7 +66,7 @@
 
     returns_valid_empty_extra/1,
     returns_valid_populated_extra_with_nulls/1,
-    buffer_overrun/1,
+
     buffer_overrun_1/1,
     buffer_overrun_2/1,
     no_nonlocal_register/1,
@@ -101,42 +103,37 @@
 %% all/1
 %%
 
-all(suite) ->
-    [
-     register_name,
-     register_names_1,
-     register_names_2,
-     register_duplicate_name,
-     get_port_nr,
-     slow_get_port_nr,
-     unregister_others_name_1,
-     unregister_others_name_2,
-     register_overflow,
-     name_with_null_inside,
-     name_null_terminated,
-     stupid_names_req,
-
-     no_data,
-     one_byte,
-     two_bytes,
-     partial_packet,
-     zero_length,
-     too_large,
-     alive_req_too_small_1,
-     alive_req_too_small_2,
-     alive_req_too_large,
-
-     returns_valid_empty_extra,
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [register_name, register_names_1, register_names_2,
+     register_duplicate_name, get_port_nr, slow_get_port_nr,
+     unregister_others_name_1, unregister_others_name_2,
+     register_overflow, name_with_null_inside,
+     name_null_terminated, stupid_names_req, no_data,
+     one_byte, two_bytes, partial_packet, zero_length,
+     too_large, alive_req_too_small_1, alive_req_too_small_2,
+     alive_req_too_large, returns_valid_empty_extra,
      returns_valid_populated_extra_with_nulls,
+     {group, buffer_overrun}, no_nonlocal_register,
+     no_nonlocal_kill, no_live_killing].
+
+groups() -> 
+    [{buffer_overrun, [],
+      [buffer_overrun_1, buffer_overrun_2]}].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
 
-     buffer_overrun,
-     %buffer_overrun_1,
-     %buffer_overrun_2,
+end_per_group(_GroupName, Config) ->
+    Config.
 
-     no_nonlocal_register,
-     no_nonlocal_kill,
-     no_live_killing
-    ].
 
 %%
 %% Run before and after each test case
@@ -147,7 +144,7 @@ init_per_testcase(_Func, Config) ->
     cleanup(),
     [{watchdog, Dog} | Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     cleanup(),
     Dog = ?config(watchdog, Config),
     catch test_server:timetrap_cancel(Dog),	% We may have canceled already
@@ -725,8 +722,6 @@ returns_valid_populated_extra_with_nulls(Config) when is_list(Config) ->
     ok.
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-buffer_overrun(suite) ->
-    [buffer_overrun_1,buffer_overrun_2].
 
 buffer_overrun_1(suite) ->
     [];
diff --git a/erts/etc/common/erlc.c b/erts/etc/common/erlc.c
index cd137435d1..35c360a99d 100644
--- a/erts/etc/common/erlc.c
+++ b/erts/etc/common/erlc.c
@@ -1,7 +1,7 @@
 /*
  * %CopyrightBegin%
  *
- * Copyright Ericsson AB 1997-2010. All Rights Reserved.
+ * Copyright Ericsson AB 1997-2011. All Rights Reserved.
  *
  * The contents of this file are subject to the Erlang Public License,
  * Version 1.1, (the "License"); you may not use this file except in
@@ -28,6 +28,7 @@
 #include <winbase.h>
 /* FIXE ME config_win32.h? */
 #define HAVE_STRERROR 1
+#define snprintf _snprintf
 #endif
 
 #include <ctype.h>
@@ -260,6 +261,95 @@ main(int argc, char** argv)
 	    case 'I':
 		PUSH2("@i", process_opt(&argc, &argv, 0));
 		break;
+	    case 'M':
+		{
+		    char *buf, *key, *val;
+		    size_t buf_len;
+
+		    if (argv[1][2] == '\0') { /* -M */
+			/* Push the following options:
+			 *   o  'makedep'
+			 *   o  {makedep_output, standard_io}
+			 */
+			buf = strsave("makedep");
+			PUSH2("@option", buf);
+
+			key = "makedep_output";
+			val = "standard_io";
+			buf_len = 1 + strlen(key) + 1 + strlen(val) + 1 + 1;
+			buf = emalloc(buf_len);
+			snprintf(buf, buf_len, "{%s,%s}", key, val);
+			PUSH2("@option", buf);
+		    } else if (argv[1][3] == '\0') {
+			switch(argv[1][2]) {
+			case 'D': /* -MD */
+			    /* Push the following options:
+			     *   o  'makedep'
+			     */
+			    buf = strsave("makedep");
+			    PUSH2("@option", buf);
+			    break;
+			case 'F': /* -MF <file> */
+			    /* Push the following options:
+			     *   o  'makedep'
+			     *   o  {makedep_output, <file>}
+			     */
+			    buf = strsave("makedep");
+			    PUSH2("@option", buf);
+
+			    key = "makedep_output";
+			    val = process_opt(&argc, &argv, 1);
+			    buf_len = 1 + strlen(key) + 2 + strlen(val) + 2 + 1;
+			    buf = emalloc(buf_len);
+			    snprintf(buf, buf_len, "{%s,\"%s\"}", key, val);
+			    PUSH2("@option", buf);
+			    break;
+			case 'T': /* -MT <target> */
+			    /* Push the following options:
+			     *   o  {makedep_target, <target>}
+			     */
+			    key = "makedep_target";
+			    val = process_opt(&argc, &argv, 1);
+			    buf_len = 1 + strlen(key) + 2 + strlen(val) + 2 + 1;
+			    buf = emalloc(buf_len);
+			    snprintf(buf, buf_len, "{%s,\"%s\"}", key, val);
+			    PUSH2("@option", buf);
+			    break;
+			case 'Q': /* -MQ <target> */
+			    /* Push the following options:
+			     *   o  {makedep_target, <target>}
+			     *   o  makedep_quote_target
+			     */
+			    key = "makedep_target";
+			    val = process_opt(&argc, &argv, 1);
+			    buf_len = 1 + strlen(key) + 2 + strlen(val) + 2 + 1;
+			    buf = emalloc(buf_len);
+			    snprintf(buf, buf_len, "{%s,\"%s\"}", key, val);
+			    PUSH2("@option", buf);
+
+			    buf = strsave("makedep_quote_target");
+			    PUSH2("@option", buf);
+			    break;
+			case 'G': /* -MG */
+			    /* Push the following options:
+			     *   o  makedep_add_missing
+			     */
+			    buf = strsave("makedep_add_missing");
+			    PUSH2("@option", buf);
+			    break;
+			case 'P': /* -MP */
+			    /* Push the following options:
+			     *   o  makedep_phony
+			     */
+			    buf = strsave("makedep_add_missing");
+			    PUSH2("@option", buf);
+			    break;
+			default:
+			    goto error;
+			}
+		    }
+		}
+		break;
 	    case 'o':
 		PUSH2("@outdir", process_opt(&argc, &argv, 0));
 		break;
@@ -561,6 +651,15 @@ usage(void)
 	{"-hybrid", "compile using hybrid-heap emulator"},
 	{"-help", "shows this help text"},
 	{"-I path", "where to search for include files"},
+	{"-M", "generate a rule for make(1) describing the dependencies"},
+	{"-MF file", "write the dependencies to 'file'"},
+	{"-MT target", "change the target of the rule emitted by dependency "
+		"generation"},
+	{"-MQ target", "same as -MT but quote characters special to make(1)"},
+	{"-MG", "consider missing headers as generated files and add them to "
+		"the dependencies"},
+	{"-MP", "add a phony target for each dependency"},
+	{"-MD", "same as -M -MT file (with default 'file')"},
 	{"-o name", "name output directory or file"},
 	{"-pa path", "add path to the front of Erlang's code path"},
 	{"-pz path", "add path to the end of Erlang's code path"},
diff --git a/erts/etc/unix/cerl.src b/erts/etc/unix/cerl.src
index 73b1bafbe0..69840daf69 100644
--- a/erts/etc/unix/cerl.src
+++ b/erts/etc/unix/cerl.src
@@ -228,17 +228,30 @@ if [ $run_valgrind != yes ]; then
 fi
 if [ "x$GDB" = "x" ]; then
     if [ $run_valgrind = yes ]; then
+	valversion=`valgrind --version`
+	valmajor=`echo $valversion | sed 's,[a-z]*\-\([0-9]*\).*,\1,'`
+        valminor=`echo $valversion | sed 's,[a-z]*\-[0-9]*.\([0-9]*\).*,\1,'`
 	emu_xargs=`echo $xargs | sed "s|+|-|g"`
-	if [ "x$VALGRIND_LOG_DIR" = "x" ]; then
-	    valgrind_log=
-	else
-	    valgrind_log="--log-file=$VALGRIND_LOG_DIR/$VALGRIND_LOGFILE_PREFIX$VALGRIND_LOGFILE_INFIX$EMU.log"
-	fi
 	if [ "x$VALGRIND_LOG_XML" = "x" ]; then
 	    valgrind_xml=
+	    log_file_prefix="--log-file="
 	else
 	    export VALGRIND_LOG_XML
 	    valgrind_xml="--xml=yes"
+	    if [ $valmajor -gt 2 -a $valminor -gt 4 ]; then
+		log_file_prefix="--xml-file="
+	    else
+		log_file_prefix="--log-file="
+	    fi
+	fi
+	if [ "x$VALGRIND_LOG_DIR" = "x" ]; then
+	    valgrind_log=
+	else
+	    if [ $valmajor -gt 2 -a $valminor -gt 4 ]; then
+		valgrind_log="$log_file_prefix$VALGRIND_LOG_DIR/$VALGRIND_LOGFILE_PREFIX$VALGRIND_LOGFILE_INFIX$EMU.log.$$"
+	    else
+		valgrind_log="$log_file_prefix$VALGRIND_LOG_DIR/$VALGRIND_LOGFILE_PREFIX$VALGRIND_LOGFILE_INFIX$EMU.log"
+	    fi
 	fi
 	if [ "x$VALGRIND_MISC_FLAGS" = "x" ]; then
 	    valgrind_misc_flags=
diff --git a/erts/preloaded/ebin/erl_prim_loader.beam b/erts/preloaded/ebin/erl_prim_loader.beam
index 87ff5119fd..bff3f7f9de 100644
--- a/erts/preloaded/ebin/erl_prim_loader.beam
+++ b/erts/preloaded/ebin/erl_prim_loader.beam
diff --git a/erts/preloaded/ebin/erlang.beam b/erts/preloaded/ebin/erlang.beam
index 6b0d96ff8e..5d2f187435 100644
--- a/erts/preloaded/ebin/erlang.beam
+++ b/erts/preloaded/ebin/erlang.beam
diff --git a/erts/preloaded/ebin/init.beam b/erts/preloaded/ebin/init.beam
index 8a7a9a1314..7e492057da 100644
--- a/erts/preloaded/ebin/init.beam
+++ b/erts/preloaded/ebin/init.beam
diff --git a/erts/preloaded/ebin/otp_ring0.beam b/erts/preloaded/ebin/otp_ring0.beam
index 5d544ff4aa..c443866671 100644
--- a/erts/preloaded/ebin/otp_ring0.beam
+++ b/erts/preloaded/ebin/otp_ring0.beam
diff --git a/erts/preloaded/ebin/prim_file.beam b/erts/preloaded/ebin/prim_file.beam
index 3ed02ecd44..4a75e43e73 100644
--- a/erts/preloaded/ebin/prim_file.beam
+++ b/erts/preloaded/ebin/prim_file.beam
diff --git a/erts/preloaded/ebin/prim_inet.beam b/erts/preloaded/ebin/prim_inet.beam
index 79a8d22366..30bbfb0943 100644
--- a/erts/preloaded/ebin/prim_inet.beam
+++ b/erts/preloaded/ebin/prim_inet.beam
diff --git a/erts/preloaded/ebin/prim_zip.beam b/erts/preloaded/ebin/prim_zip.beam
index 3cc8c6b8be..6681466767 100644
--- a/erts/preloaded/ebin/prim_zip.beam
+++ b/erts/preloaded/ebin/prim_zip.beam
diff --git a/erts/preloaded/ebin/zlib.beam b/erts/preloaded/ebin/zlib.beam
index 3f9e867542..593bb8dbed 100644
--- a/erts/preloaded/ebin/zlib.beam
+++ b/erts/preloaded/ebin/zlib.beam
diff --git a/erts/preloaded/src/erlang.erl b/erts/preloaded/src/erlang.erl
index 935c2de253..d6dc070436 100644
--- a/erts/preloaded/src/erlang.erl
+++ b/erts/preloaded/src/erlang.erl
@@ -427,17 +427,11 @@ delay_trap(Result, Timeout) -> receive after Timeout -> Result end.
 %% have to reflect that, which we cannot forsee.
 %%
 set_cookie(Node, C) when Node =/= nonode@nohost, is_atom(Node) ->
-    Res = case C of
-	      _ when is_atom(C) ->
-		  auth:set_cookie(Node, C);
-	      {CI,CO} when is_atom(CI), is_atom(CO) ->
-		  auth:set_cookie(Node, {CI, CO});
-	      _ ->
-		  error
-	  end,
-    case Res of
-	error -> exit(badarg);
-	Other -> Other
+    case is_atom(C) of
+	true ->
+	    auth:set_cookie(Node, C);
+	false ->
+	    error(badarg)
     end.
 
 -spec get_cookie() -> atom().
diff --git a/erts/preloaded/src/prim_inet.erl b/erts/preloaded/src/prim_inet.erl
index 446656e45f..2e4a2866e6 100644
--- a/erts/preloaded/src/prim_inet.erl
+++ b/erts/preloaded/src/prim_inet.erl
@@ -1518,7 +1518,7 @@ enc_value_2(addr, {IP,Port}) when tuple_size(IP) =:= 4 ->
     [?INET_AF_INET,?int16(Port)|ip4_to_bytes(IP)];
 enc_value_2(addr, {IP,Port}) when tuple_size(IP) =:= 8 ->
     [?INET_AF_INET6,?int16(Port)|ip6_to_bytes(IP)];
-enc_value_2(ether, [X1,X2,X3,X4,X5,X6]) -> [X1,X2,X3,X4,X5,X6];
+enc_value_2(ether, [_,_,_,_,_,_]=Xs) -> Xs;
 enc_value_2(sockaddr, any) ->
     [?INET_AF_ANY];
 enc_value_2(sockaddr, loopback) ->
@@ -1572,7 +1572,7 @@ dec_value(time, [X3,X2,X1,X0|T]) ->
 	Val -> {Val, T}
     end;
 dec_value(ip, [A,B,C,D|T])             -> {{A,B,C,D}, T};
-dec_value(ether,[X1,X2,X3,X4,X5,X6|T]) -> {[X1,X2,X3,X4,X5,X6],T};
+%% dec_value(ether, [X1,X2,X3,X4,X5,X6|T]) -> {[X1,X2,X3,X4,X5,X6],T};
 dec_value(sockaddr, [X|T]) ->
     get_ip(X, T);
 dec_value(linkaddr, [X1,X0|T]) ->
diff --git a/erts/test/autoimport_SUITE.erl b/erts/test/autoimport_SUITE.erl
index 2430dac78d..9724ea3ad5 100644
--- a/erts/test/autoimport_SUITE.erl
+++ b/erts/test/autoimport_SUITE.erl
@@ -20,16 +20,38 @@
 -module(autoimport_SUITE).
 
 -include_lib("test_server/include/test_server.hrl").
--export([all/1,init_per_testcase/2,fin_per_testcase/2,autoimports/1]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
+	 autoimports/1]).
 -define(TEST_TIMEOUT, ?t:seconds(180)).
 
-all(suite) -> [autoimports].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [autoimports].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 init_per_testcase(_Func, Config) ->
     Dog = test_server:timetrap(?TEST_TIMEOUT),
     [{watchdog, Dog} | Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     Dog = ?config(watchdog, Config),
     catch test_server:timetrap_cancel(Dog),
     ok.
diff --git a/erts/test/erl_print_SUITE.erl b/erts/test/erl_print_SUITE.erl
index 3bb7d4d016..fe9e811d4d 100644
--- a/erts/test/erl_print_SUITE.erl
+++ b/erts/test/erl_print_SUITE.erl
@@ -32,14 +32,35 @@
 
 -define(DEFAULT_TIMEOUT, ?t:minutes(10)).
 
--export([all/1, init_per_testcase/2, fin_per_testcase/2]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, fin_per_testcase/2]).
 
--export([erlang_display/1, integer/1, float/1, string/1, character/1, snprintf/1, quote/1]).
+-export([erlang_display/1, integer/1, float/1, 
+	 string/1, character/1, snprintf/1, quote/1]).
 
 -include_lib("test_server/include/test_server.hrl").
-    
-all(doc) -> [];
-all(suite) -> test_cases().
+
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    test_cases().
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 %%
 %%
@@ -47,14 +68,9 @@ all(suite) -> test_cases().
 %%
 %%
 
-test_cases() ->
-    [erlang_display,
-     integer,
-     float,
-     string,
-     character,
-     snprintf,
-     quote].
+test_cases() -> 
+    [erlang_display, integer, float, string, character,
+     snprintf, quote].
 
 erlang_display(doc) -> [];
 erlang_display(suite) -> [];
diff --git a/erts/test/erlc_SUITE.erl b/erts/test/erlc_SUITE.erl
index 4797f78be2..a3a33b568c 100644
--- a/erts/test/erlc_SUITE.erl
+++ b/erts/test/erlc_SUITE.erl
@@ -20,15 +20,34 @@
 
 %% Tests the erlc command by compiling various types of files.
 
--export([all/1, compile_erl/1, compile_yecc/1, compile_script/1,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, compile_erl/1,
+	 compile_yecc/1, compile_script/1,
 	 compile_mib/1, good_citizen/1, deep_cwd/1, arg_overflow/1]).
 
 -include_lib("test_server/include/test_server.hrl").
 
-all(suite) ->
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
     [compile_erl, compile_yecc, compile_script, compile_mib,
      good_citizen, deep_cwd, arg_overflow].
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 %% Copy from erlc_SUITE_data/include/erl_test.hrl.
 
 -record(person, {name, shoe_size}).
diff --git a/erts/test/erlexec_SUITE.erl b/erts/test/erlexec_SUITE.erl
index 6adb865f6d..e932e5a211 100644
--- a/erts/test/erlexec_SUITE.erl
+++ b/erts/test/erlexec_SUITE.erl
@@ -31,7 +31,9 @@
 
 -define(DEFAULT_TIMEOUT, ?t:minutes(1)).
 
--export([all/1, init_per_testcase/2, fin_per_testcase/2]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, end_per_testcase/2]).
 
 -export([args_file/1, evil_args_file/1, env/1, args_file_env/1, otp_7461/1, otp_7461_remote/1, otp_8209/1, zdbbl_dist_buf_busy_limit/1]).
 
@@ -43,7 +45,7 @@ init_per_testcase(Case, Config) ->
     SavedEnv = save_env(),
     [{testcase, Case}, {watchdog, Dog}, {erl_flags_env, SavedEnv} |Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     Dog = ?config(watchdog, Config),
     SavedEnv = ?config(erl_flags_env, Config),
     restore_env(SavedEnv),
@@ -51,11 +53,26 @@ fin_per_testcase(_Case, Config) ->
     ?t:timetrap_cancel(Dog),
     ok.
 
-all(doc) -> [];
-all(suite) ->
-    [args_file, evil_args_file, env, args_file_env, otp_7461, otp_8209,
-     zdbbl_dist_buf_busy_limit].
+suite() -> [{ct_hooks,[ts_install_cth]}].
 
+all() -> 
+    [args_file, evil_args_file, env, args_file_env,
+     otp_7461, otp_8209, zdbbl_dist_buf_busy_limit].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
 otp_8209(doc) ->
     ["Test that plain first argument does not "
diff --git a/erts/test/ethread_SUITE.erl b/erts/test/ethread_SUITE.erl
index 69e5af802f..9bc3eebb74 100644
--- a/erts/test/ethread_SUITE.erl
+++ b/erts/test/ethread_SUITE.erl
@@ -31,7 +31,9 @@
 
 -define(DEFAULT_TIMEOUT, ?t:minutes(10)).
 
--export([all/1, init_per_testcase/2, fin_per_testcase/2]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, fin_per_testcase/2]).
 
 -export([create_join_thread/1,
 	 equal_tids/1,
@@ -49,24 +51,30 @@
 
 -include_lib("test_server/include/test_server.hrl").
 
-tests() ->
-    [create_join_thread,
-     equal_tids,
-     mutex,
-     try_lock_mutex,
-     cond_wait,
-     broadcast,
-     detached_thread,
-     max_threads,
-     tsd,
-     spinlock,
-     rwspinlock,
-     rwmutex,
-     atomic].
-
-all(doc) -> [];
-all(suite) -> tests().
+tests() -> 
+    [create_join_thread, equal_tids, mutex, try_lock_mutex,
+     cond_wait, broadcast, detached_thread,
+     max_threads, tsd, spinlock, rwspinlock, rwmutex, atomic].
 
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    tests().
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
 
 %%
 %%
diff --git a/erts/test/install_SUITE.erl b/erts/test/install_SUITE.erl
index e14790bc1b..2279ddae00 100644
--- a/erts/test/install_SUITE.erl
+++ b/erts/test/install_SUITE.erl
@@ -29,8 +29,9 @@
 
 %-define(line_trace, 1).
 
--export([all/1, init_per_suite/1, end_per_suite/1,
-	 init_per_testcase/2, fin_per_testcase/2]).
+-export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2, 
+	 init_per_suite/1, end_per_suite/1,
+	 init_per_testcase/2, end_per_testcase/2]).
 
 -export([bin_default/1,
 	 bin_default_dirty/1,
@@ -64,27 +65,32 @@
 	       erlang_bindir = "",
 	       bindir_symlinks = ""}).
 
-need_symlink_cases() ->
-    [bin_unreachable_absolute,
-     bin_unreachable_relative,
-     bin_same_dir,
-     bin_ok_symlink,
-     bin_dirname_fail,
+need_symlink_cases() -> 
+    [bin_unreachable_absolute, bin_unreachable_relative,
+     bin_same_dir, bin_ok_symlink, bin_dirname_fail,
      bin_no_use_dirname_fail].
 
-dont_need_symlink_cases() ->
-    [bin_default,
-     bin_default_dirty,
-     bin_outside_eprfx,
-     bin_outside_eprfx_dirty,
-     bin_not_abs,
-     bin_unreasonable_path,
-     'bin white space',
+dont_need_symlink_cases() -> 
+    [bin_default, bin_default_dirty, bin_outside_eprfx,
+     bin_outside_eprfx_dirty, bin_not_abs,
+     bin_unreasonable_path, 'bin white space',
      bin_no_srcfile].
 
-all(suite) ->
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
     dont_need_symlink_cases() ++ need_symlink_cases().
 
+groups() -> 
+    [].
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 %%
 %% The test cases
 %%
@@ -585,7 +591,7 @@ init_per_testcase_aux(true, _OsType, Case, Config) ->
      {test_dir, make_dirs(?config(priv_dir, Config), atom_to_list(Case))}
      | Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog),
     ok.
diff --git a/erts/test/nt_SUITE.erl b/erts/test/nt_SUITE.erl
index 530fb55270..8b2d8a7147 100644
--- a/erts/test/nt_SUITE.erl
+++ b/erts/test/nt_SUITE.erl
@@ -22,7 +22,9 @@
 -include_lib("test_server/include/test_server.hrl").
 -include_lib("kernel/include/file.hrl").
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,nt/1,handle_eventlog/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,init_per_testcase/2,
+	 end_per_testcase/2,nt/1,handle_eventlog/2,
 	 middleman/1,service_basic/1, service_env/1, user_env/1, synced/1, 
 	 service_prio/1, 
 	 logout/1, debug/1, restart/1, restart_always/1,stopaction/1,
@@ -31,20 +33,38 @@
 
 -define(TEST_SERVICES, [1,2,3,4,5,6,7,8,9,10,11]).
 
-all(suite) ->
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
     case os:type() of
-	{win32,nt} ->
-	    [nt, service_basic, service_env, user_env, synced, service_prio, 
-	     logout, debug,
-	     restart, restart_always, stopaction];
-	_ -> [nt] %%% Just to give a little hint why they are skipped...
+	{win32, nt} ->
+	    [nt, service_basic, service_env, user_env, synced,
+	     service_prio, logout, debug, restart, restart_always,
+	     stopaction];
+	_ -> [nt]
     end.
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 init_per_testcase(_Func, Config) ->
     Dog = test_server:timetrap(?TEST_TIMEOUT),
     [{watchdog, Dog} | Config].
 
-fin_per_testcase(_Func, Config) ->
+end_per_testcase(_Func, Config) ->
     lists:foreach(fun(X) -> 
 			  catch remove_service("test_service_" ++ 
 					 integer_to_list(X)) end,
diff --git a/erts/test/otp_SUITE.erl b/erts/test/otp_SUITE.erl
index 425ad31782..43655c4844 100644
--- a/erts/test/otp_SUITE.erl
+++ b/erts/test/otp_SUITE.erl
@@ -19,7 +19,8 @@
 
 -module(otp_SUITE).
 
--export([all/1,init_per_suite/1,end_per_suite/1]).
+-export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2,
+	 init_per_suite/1,end_per_suite/1]).
 -export([undefined_functions/1,deprecated_not_in_obsolete/1,
 	 obsolete_but_not_deprecated/1,call_to_deprecated/1,
          call_to_size_1/1,strong_components/1]).
@@ -28,10 +29,22 @@
 
 -import(lists, [filter/2,foldl/3,foreach/2]).
 
-all(suite) ->
-    [undefined_functions,deprecated_not_in_obsolete,
-     obsolete_but_not_deprecated,call_to_deprecated,
-     call_to_size_1,strong_components].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [undefined_functions, deprecated_not_in_obsolete,
+     obsolete_but_not_deprecated, call_to_deprecated,
+     call_to_size_1, strong_components].
+
+groups() -> 
+    [].
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 init_per_suite(Config) ->
     Dog = test_server:timetrap(?t:minutes(10)),
diff --git a/erts/test/run_erl_SUITE.erl b/erts/test/run_erl_SUITE.erl
index efeafbad8c..5288e3e827 100644
--- a/erts/test/run_erl_SUITE.erl
+++ b/erts/test/run_erl_SUITE.erl
@@ -19,7 +19,9 @@
 
 -module(run_erl_SUITE).
 
--export([all/1,init_per_testcase/2,fin_per_testcase/2,
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2,
+	 init_per_testcase/2,end_per_testcase/2,
 	 basic/1,heavy/1,heavier/1,defunct/1]).
 -export([ping_me_back/1]).
 
@@ -29,13 +31,31 @@ init_per_testcase(_Case, Config) ->
     Dog = ?t:timetrap(?t:minutes(2)),
     [{watchdog, Dog}|Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog),
     ok.
 
-all(suite) ->
-    [basic,heavy,heavier,defunct].
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
+    [basic, heavy, heavier, defunct].
+
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
 
 basic(Config) when is_list(Config) ->
     case os:type() of
diff --git a/erts/test/system.spec b/erts/test/system.spec
index 9bfe2dbcf8..e0561ba0b2 100644
--- a/erts/test/system.spec
+++ b/erts/test/system.spec
@@ -1 +1 @@
-{topcase, {dir, "../system_test"}}.
+{suites,"../system_test",all}.
diff --git a/erts/test/z_SUITE.erl b/erts/test/z_SUITE.erl
index 9f13a7083d..acd07b44c5 100644
--- a/erts/test/z_SUITE.erl
+++ b/erts/test/z_SUITE.erl
@@ -35,26 +35,45 @@
 
 -define(DEFAULT_TIMEOUT, ?t:minutes(5)).
 
--export([all/1, init_per_testcase/2, fin_per_testcase/2]).
+-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, 
+	 init_per_group/2,end_per_group/2, 
+	 init_per_testcase/2, end_per_testcase/2]).
 
 -export([search_for_core_files/1, core_files/1]).
 
--include_lib("test_server/include/test_server.hrl").
+-include_lib("common_test/include/ct.hrl").
     
 
 init_per_testcase(Case, Config) ->
     Dog = ?t:timetrap(?DEFAULT_TIMEOUT),
     [{testcase, Case}, {watchdog, Dog} |Config].
 
-fin_per_testcase(_Case, Config) ->
+end_per_testcase(_Case, Config) ->
     Dog = ?config(watchdog, Config),
     ?t:timetrap_cancel(Dog),
     ok.
 
-all(doc) -> [];
-all(suite) ->
+suite() -> [{ct_hooks,[ts_install_cth]}].
+
+all() -> 
     [core_files].
 
+groups() -> 
+    [].
+
+init_per_suite(Config) ->
+    Config.
+
+end_per_suite(_Config) ->
+    ok.
+
+init_per_group(_GroupName, Config) ->
+    Config.
+
+end_per_group(_GroupName, Config) ->
+    Config.
+
+
 
 core_files(doc) ->
     [];