compiler: Run testcases in parallel

Run testcases in parallel will make the test suite run slightly
faster. Another reason for this change is that we want more testing
of parallel testcase support in common_test.

18 files changed, 157 insertions, 111 deletions

diff --git a/lib/compiler/test/andor_SUITE.erl b/lib/compiler/test/andor_SUITE.erl
index f7388f1614..fe69aeeb43 100644
--- a/lib/compiler/test/andor_SUITE.erl
+++ b/lib/compiler/test/andor_SUITE.erl
@@ -29,11 +29,12 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [t_case, t_and_or, t_andalso, t_orelse, inside, overlap,
-     combined, in_case, before_and_inside_if].
+    [{group,p}].
 
 groups() -> 
-    [].
+    [{p,test_lib:parallel(),
+      [t_case,t_and_or,t_andalso,t_orelse,inside,overlap,
+       combined,in_case,before_and_inside_if]}].
 
 init_per_suite(Config) ->
     Config.
diff --git a/lib/compiler/test/beam_validator_SUITE.erl b/lib/compiler/test/beam_validator_SUITE.erl
index 902867bc19..c84c83795a 100644
--- a/lib/compiler/test/beam_validator_SUITE.erl
+++ b/lib/compiler/test/beam_validator_SUITE.erl
@@ -47,17 +47,18 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [beam_files, compiler_bug, stupid_but_valid, xrange,
-     yrange, stack, call_last, merge_undefined, uninit,
-     unsafe_catch, dead_code, mult_labels,
-     overwrite_catchtag, overwrite_trytag, accessing_tags,
-     bad_catch_try, cons_guard, freg_range, freg_uninit,
-     freg_state, bin_match, bin_aligned, bad_dsetel,
-     state_after_fault_in_catch, no_exception_in_catch,
-     undef_label, illegal_instruction, failing_gc_guard_bif].
+    [beam_files,{group,p}].
 
 groups() -> 
-    [].
+    [{p,test_lib:parallel(),
+      [compiler_bug,stupid_but_valid,xrange,
+       yrange,stack,call_last,merge_undefined,uninit,
+       unsafe_catch,dead_code,mult_labels,
+       overwrite_catchtag,overwrite_trytag,accessing_tags,
+       bad_catch_try,cons_guard,freg_range,freg_uninit,
+       freg_state,bin_match,bin_aligned,bad_dsetel,
+       state_after_fault_in_catch,no_exception_in_catch,
+       undef_label,illegal_instruction,failing_gc_guard_bif]}].
 
 init_per_suite(Config) ->
     Config.
diff --git a/lib/compiler/test/bs_bit_binaries_SUITE.erl b/lib/compiler/test/bs_bit_binaries_SUITE.erl
index 30276f1259..897b4769f1 100644
--- a/lib/compiler/test/bs_bit_binaries_SUITE.erl
+++ b/lib/compiler/test/bs_bit_binaries_SUITE.erl
@@ -34,13 +34,15 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [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].
+    [{group,p}].
 
 groups() -> 
-    [].
+    [{p,test_lib:parallel(),
+      [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]}].
+      
 
 init_per_suite(Config) ->
     Config.
diff --git a/lib/compiler/test/bs_construct_SUITE.erl b/lib/compiler/test/bs_construct_SUITE.erl
index a393aaeffd..4ea5235bb6 100644
--- a/lib/compiler/test/bs_construct_SUITE.erl
+++ b/lib/compiler/test/bs_construct_SUITE.erl
@@ -36,12 +36,14 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [two, test1, fail, float_bin, in_guard, in_catch,
-     nasty_literals, side_effect, opt, otp_7556, float_arith,
-     otp_8054].
+    [{group,p}].
 
 groups() -> 
-    [].
+    [{p,test_lib:parallel(),
+      [two,test1,fail,float_bin,in_guard,in_catch,
+       nasty_literals,side_effect,opt,otp_7556,float_arith,
+       otp_8054]}].
+
 
 init_per_suite(Config) ->
     Config.
diff --git a/lib/compiler/test/bs_match_SUITE.erl b/lib/compiler/test/bs_match_SUITE.erl
index 0e9d0bbc17..1bef409be0 100644
--- a/lib/compiler/test/bs_match_SUITE.erl
+++ b/lib/compiler/test/bs_match_SUITE.erl
@@ -44,19 +44,21 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [fun_shadow, int_float, otp_5269, null_fields, wiger,
-     bin_tail, save_restore, shadowed_size_var,
-     partitioned_bs_match, function_clause, unit,
-     shared_sub_bins, bin_and_float, dec_subidentifiers,
-     skip_optional_tag, wfbm, degenerated_match, bs_sum,
-     coverage, multiple_uses, zero_label, followed_by_catch,
-     matching_meets_construction, simon,
-     matching_and_andalso, otp_7188, otp_7233, otp_7240,
-     otp_7498, match_string, zero_width, bad_size, haystack,
-     cover_beam_bool, matched_out_size].
+    [{group,p}].
 
 groups() -> 
-    [].
+    [{p,test_lib:parallel(),
+      [fun_shadow,int_float,otp_5269,null_fields,wiger,
+       bin_tail,save_restore,shadowed_size_var,
+       partitioned_bs_match,function_clause,unit,
+       shared_sub_bins,bin_and_float,dec_subidentifiers,
+       skip_optional_tag,wfbm,degenerated_match,bs_sum,
+       coverage,multiple_uses,zero_label,followed_by_catch,
+       matching_meets_construction,simon,
+       matching_and_andalso,otp_7188,otp_7233,otp_7240,
+       otp_7498,match_string,zero_width,bad_size,haystack,
+       cover_beam_bool,matched_out_size]}].
+
 
 init_per_suite(Config) ->
     Config.
diff --git a/lib/compiler/test/compilation_SUITE.erl b/lib/compiler/test/compilation_SUITE.erl
index 34f105b5fc..bec97b0199 100644
--- a/lib/compiler/test/compilation_SUITE.erl
+++ b/lib/compiler/test/compilation_SUITE.erl
@@ -28,26 +28,29 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [self_compile_old_inliner, self_compile, compiler_1,
-     compiler_3, compiler_5, beam_compiler_1,
-     beam_compiler_2, beam_compiler_3, beam_compiler_4,
-     beam_compiler_5, beam_compiler_6, beam_compiler_7,
-     beam_compiler_8, beam_compiler_9, beam_compiler_10,
-     beam_compiler_11, beam_compiler_12,
-     nested_tuples_in_case_expr, otp_2330, guards,
-     {group, vsn}, otp_2380, otp_2141, otp_2173, otp_4790,
-     const_list_256, bin_syntax_1, bin_syntax_2,
-     bin_syntax_3, bin_syntax_4, bin_syntax_5, bin_syntax_6,
-     live_var, convopts, bad_functional_value,
-     catch_in_catch, redundant_case, long_string, otp_5076,
-     complex_guard, otp_5092, otp_5151, otp_5235, otp_5244,
-     trycatch_4, opt_crash, otp_5404, otp_5436, otp_5481,
-     otp_5553, otp_5632, otp_5714, otp_5872, otp_6121,
-     otp_6121a, otp_6121b, otp_7202, otp_7345, on_load,
-     string_table,otp_8949_a,otp_8949_a,split_cases].
+    [self_compile_old_inliner,self_compile,
+     {group,p}].
 
 groups() -> 
-    [{vsn, [], [vsn_1, vsn_2, vsn_3]}].
+    [{vsn,[parallel],[vsn_1,vsn_2,vsn_3]},
+     {p,test_lib:parallel(),
+      [compiler_1,
+       compiler_3,compiler_5,beam_compiler_1,
+       beam_compiler_2,beam_compiler_3,beam_compiler_4,
+       beam_compiler_5,beam_compiler_6,beam_compiler_7,
+       beam_compiler_8,beam_compiler_9,beam_compiler_10,
+       beam_compiler_11,beam_compiler_12,
+       nested_tuples_in_case_expr,otp_2330,guards,
+       {group,vsn},otp_2380,otp_2141,otp_2173,otp_4790,
+       const_list_256,bin_syntax_1,bin_syntax_2,
+       bin_syntax_3,bin_syntax_4,bin_syntax_5,bin_syntax_6,
+       live_var,convopts,bad_functional_value,
+       catch_in_catch,redundant_case,long_string,otp_5076,
+       complex_guard,otp_5092,otp_5151,otp_5235,otp_5244,
+       trycatch_4,opt_crash,otp_5404,otp_5436,otp_5481,
+       otp_5553,otp_5632,otp_5714,otp_5872,otp_6121,
+       otp_6121a,otp_6121b,otp_7202,otp_7345,on_load,
+       string_table,otp_8949_a,otp_8949_a,split_cases]}].
 
 init_per_suite(Config) ->
     Config.
diff --git a/lib/compiler/test/core_SUITE.erl b/lib/compiler/test/core_SUITE.erl
index 06185bfc34..a40dc32d59 100644
--- a/lib/compiler/test/core_SUITE.erl
+++ b/lib/compiler/test/core_SUITE.erl
@@ -43,11 +43,13 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [dehydrated_itracer,nested_tries,seq_in_guard,make_effect_seq,
-     eval_is_boolean,unsafe_case,nomatch_shadow,reversed_annos].
+    [{group,p}].
 
 groups() -> 
-    [].
+    [{p,test_lib:parallel(),
+      [dehydrated_itracer,nested_tries,seq_in_guard,make_effect_seq,
+       eval_is_boolean,unsafe_case,nomatch_shadow,reversed_annos]}].
+
 
 init_per_suite(Config) ->
     Config.
diff --git a/lib/compiler/test/core_fold_SUITE.erl b/lib/compiler/test/core_fold_SUITE.erl
index 54bd52947e..2adc71c237 100644
--- a/lib/compiler/test/core_fold_SUITE.erl
+++ b/lib/compiler/test/core_fold_SUITE.erl
@@ -31,11 +31,13 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [t_element, setelement, t_length, append, t_apply, bifs,
-     eq, nested_call_in_case, guard_try_catch, coverage].
+    [{group,p}].
 
 groups() -> 
-    [].
+    [{p,test_lib:parallel(),
+      [t_element,setelement,t_length,append,t_apply,bifs,
+       eq,nested_call_in_case,guard_try_catch,coverage]}].
+
 
 init_per_suite(Config) ->
     Config.
diff --git a/lib/compiler/test/error_SUITE.erl b/lib/compiler/test/error_SUITE.erl
index e798023cd8..859c4571ea 100644
--- a/lib/compiler/test/error_SUITE.erl
+++ b/lib/compiler/test/error_SUITE.erl
@@ -32,10 +32,11 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [head_mismatch_line, warnings_as_errors, bif_clashes, transforms].
+    [{group,p}].
 
 groups() -> 
-    [].
+    [{p,test_lib:parallel(),
+      [head_mismatch_line,warnings_as_errors,bif_clashes,transforms]}].
 
 init_per_suite(Config) ->
     Config.
@@ -282,12 +283,14 @@ filter(X) ->
 %% Compiles a test module and returns the list of errors and warnings.
 
 test_filename(Conf) ->
-    Filename = "errors_test.erl",
+    Filename = ["errors_test_",test_lib:uniq(),".erl"],
     DataDir = ?config(priv_dir, Conf),
     filename:join(DataDir, Filename).
 
 run_test(Test0, File, Warnings, WriteBeam) ->
-    ?line Test = ["-module(errors_test). ", Test0],
+    ModName = filename:rootname(filename:basename(File), ".erl"),
+    Mod = list_to_atom(ModName),
+    Test = ["-module(",ModName,"). ",Test0],
     ?line Opts = case WriteBeam of
 		     dont_write_beam ->
 			 [binary,return_errors|Warnings];
@@ -301,17 +304,17 @@ run_test(Test0, File, Warnings, WriteBeam) ->
 
     %% Test result of compilation.
     ?line Res = case compile:file(File, Opts) of
-		    {ok,errors_test,_,[{_File,Ws}]} ->
+		    {ok,Mod,_,[{_File,Ws}]} ->
 			%io:format("compile:file(~s,~p) ->~n~p~n",
 			%	  [File,Opts,Ws]),
 			{warning,Ws};
-		    {ok,errors_test,_,[]} ->
+		    {ok,Mod,_,[]} ->
 			%io:format("compile:file(~s,~p) ->~n~p~n",
 			%	  [File,Opts,Ws]),
 			[];
-		    {ok,errors_test,[{_File,Ws}]} ->
+		    {ok,Mod,[{_File,Ws}]} ->
 			{warning,Ws};
-		    {ok,errors_test,[]} ->
+		    {ok,Mod,[]} ->
 			[];
 		    {error,[{XFile,Es}],Ws} = _ZZ when is_list(XFile) ->
 			%io:format("compile:file(~s,~p) ->~n~p~n",
diff --git a/lib/compiler/test/guard_SUITE.erl b/lib/compiler/test/guard_SUITE.erl
index 40711783ed..66c0b9a295 100644
--- a/lib/compiler/test/guard_SUITE.erl
+++ b/lib/compiler/test/guard_SUITE.erl
@@ -39,17 +39,18 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [misc, const_cond, basic_not, complex_not, nested_nots,
-     semicolon, complex_semicolon, comma, or_guard,
-     more_or_guards, complex_or_guards, and_guard, xor_guard,
-     more_xor_guards, build_in_guard, old_guard_tests, gbif,
-     t_is_boolean, is_function_2, tricky, rel_ops,
-     literal_type_tests, basic_andalso_orelse, traverse_dcd,
-     check_qlc_hrl, andalso_semi, t_tuple_size, binary_part,
-     bad_constants].
+    [{group,p}].
 
 groups() -> 
-    [].
+    [{p,test_lib:parallel(),
+      [misc,const_cond,basic_not,complex_not,nested_nots,
+       semicolon,complex_semicolon,comma,or_guard,
+       more_or_guards,complex_or_guards,and_guard,xor_guard,
+       more_xor_guards,build_in_guard,old_guard_tests,gbif,
+       t_is_boolean,is_function_2,tricky,rel_ops,
+       literal_type_tests,basic_andalso_orelse,traverse_dcd,
+       check_qlc_hrl,andalso_semi,t_tuple_size,binary_part,
+       bad_constants]}].
 
 init_per_suite(Config) ->
     Config.
diff --git a/lib/compiler/test/inline_SUITE.erl b/lib/compiler/test/inline_SUITE.erl
index 2e17d3fde6..e2eb6a0dec 100644
--- a/lib/compiler/test/inline_SUITE.erl
+++ b/lib/compiler/test/inline_SUITE.erl
@@ -32,17 +32,22 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [attribute, bsdecode, bsdes, barnes2, decode1, smith,
-     itracer, pseudoknot, comma_splitter, lists, really_inlined, otp_7223,
-     coverage].
+    [{group,p}].
 
 groups() -> 
-    [].
+    [{p,test_lib:parallel(),
+      [attribute,bsdecode,bsdes,barnes2,decode1,smith,
+       itracer,pseudoknot,comma_splitter,lists,really_inlined,otp_7223,
+       coverage]}].
 
 init_per_suite(Config) ->
-    Config.
+    Pa = "-pa " ++ filename:dirname(code:which(?MODULE)),
+    {ok,Node} = start_node(compiler, Pa),
+    [{testing_node,Node}|Config].
 
-end_per_suite(_Config) ->
+end_per_suite(Config) ->
+    Node = ?config(testing_node, Config),
+    ?t:stop_node(Node),
     ok.
 
 init_per_group(_GroupName, Config) ->
@@ -81,6 +86,7 @@ attribute(Config) when is_list(Config) ->
 ?comp(comma_splitter).
 
 try_inline(Mod, Config) ->
+    Node = ?config(testing_node, Config),
     ?line Src = filename:join(?config(data_dir, Config), atom_to_list(Mod)),
     ?line Out = ?config(priv_dir,Config),
 
@@ -89,8 +95,6 @@ try_inline(Mod, Config) ->
     ?line {ok,Mod} = compile:file(Src, [{outdir,Out},report,bin_opt_info,clint]),
 
     ?line Dog = test_server:timetrap(test_server:minutes(10)),
-    ?line Pa = "-pa " ++ filename:dirname(code:which(?MODULE)),
-    ?line {ok,Node} = start_node(compiler, Pa),
     ?line NormalResult = rpc:call(Node, ?MODULE, load_and_call, [Out,Mod]),
     ?line test_server:timetrap_cancel(Dog),
 
@@ -125,7 +129,6 @@ try_inline(Mod, Config) ->
     %% Delete Beam file.
     ?line ok = file:delete(filename:join(Out, atom_to_list(Mod)++code:objfile_extension())),
 
-    ?line ?t:stop_node(Node),
     ok.
 
 compare(Same, Same) -> ok;
@@ -293,9 +296,9 @@ otp_7223_2({a}) ->
     1.
 
 coverage(Config) when is_list(Config) ->
-    ?line Src = filename:join(?config(data_dir, Config), bsdecode),
-    ?line Out = ?config(priv_dir,Config),
-    ?line {ok,Mod} = compile:file(Src, [{outdir,Out},report,{inline,0},clint]),
-    ?line {ok,Mod} = compile:file(Src, [{outdir,Out},report,{inline,20},verbose,clint]),
-    ?line ok = file:delete(filename:join(Out, "bsdecode"++code:objfile_extension())),
+    Mod = bsdecode,
+    Src = filename:join(?config(data_dir, Config), Mod),
+    {ok,Mod,_} = compile:file(Src, [binary,report,{inline,0},clint]),
+    {ok,Mod,_} = compile:file(Src, [binary,report,{inline,20},
+				    verbose,clint]),
     ok.
diff --git a/lib/compiler/test/match_SUITE.erl b/lib/compiler/test/match_SUITE.erl
index 9406d7de8f..de44926d81 100644
--- a/lib/compiler/test/match_SUITE.erl
+++ b/lib/compiler/test/match_SUITE.erl
@@ -30,11 +30,13 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [pmatch, mixed, aliases, match_in_call, untuplify,
-     shortcut_boolean, letify_guard, selectify, underscore, coverage].
+    [{group,p}].
 
 groups() -> 
-    [].
+    [{p,test_lib:parallel(),
+      [pmatch,mixed,aliases,match_in_call,untuplify,
+       shortcut_boolean,letify_guard,selectify,underscore,coverage]}].
+
 
 init_per_suite(Config) ->
     Config.
diff --git a/lib/compiler/test/misc_SUITE.erl b/lib/compiler/test/misc_SUITE.erl
index 6df8b2ac30..44c7161530 100644
--- a/lib/compiler/test/misc_SUITE.erl
+++ b/lib/compiler/test/misc_SUITE.erl
@@ -57,11 +57,12 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 -spec all() -> misc_SUITE_test_cases().
 all() -> 
     test_lib:recompile(?MODULE),
-    [tobias, empty_string, md5, silly_coverage,
-     confused_literals, integer_encoding, override_bif].
+    [{group,p}].
 
 groups() -> 
-    [].
+    [{p,[],%%test_lib:parallel(),
+      [tobias,empty_string,md5,silly_coverage,
+       confused_literals,integer_encoding,override_bif]}].
 
 init_per_suite(Config) ->
     Config.
diff --git a/lib/compiler/test/receive_SUITE.erl b/lib/compiler/test/receive_SUITE.erl
index 2a67615e5e..55aaa0e5d9 100644
--- a/lib/compiler/test/receive_SUITE.erl
+++ b/lib/compiler/test/receive_SUITE.erl
@@ -40,10 +40,12 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [recv, coverage, otp_7980, ref_opt, export].
+    [{group,p}].
 
 groups() -> 
-    [].
+    {p,test_lib:parallel(),
+     [recv,coverage,otp_7980,ref_opt,export]}.
+
 
 init_per_suite(Config) ->
     Config.
diff --git a/lib/compiler/test/record_SUITE.erl b/lib/compiler/test/record_SUITE.erl
index 363422ec7e..96f3712be9 100644
--- a/lib/compiler/test/record_SUITE.erl
+++ b/lib/compiler/test/record_SUITE.erl
@@ -42,12 +42,14 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [errors, record_test_2, record_test_3,
-     record_access_in_guards, guard_opt, eval_once, foobar,
-     missing_test_heap, nested_access, coverage].
+    [{group,p}].
 
 groups() -> 
-    [].
+    [{p,test_lib:parallel(),
+      [errors,record_test_2,record_test_3,
+       record_access_in_guards,guard_opt,eval_once,foobar,
+       missing_test_heap,nested_access,coverage]}].
+
 
 init_per_suite(Config) ->
     Config.
diff --git a/lib/compiler/test/test_lib.erl b/lib/compiler/test/test_lib.erl
index 2295592a38..996c369705 100644
--- a/lib/compiler/test/test_lib.erl
+++ b/lib/compiler/test/test_lib.erl
@@ -20,7 +20,8 @@
 
 -include("test_server.hrl").
 -compile({no_auto_import,[binary_part/2]}).
--export([recompile/1,opt_opts/1,get_data_dir/1,smoke_disasm/1,p_run/2,binary_part/2]).
+-export([recompile/1,parallel/0,uniq/0,opt_opts/1,get_data_dir/1,
+	 smoke_disasm/1,p_run/2,binary_part/2]).
 
 recompile(Mod) when is_atom(Mod) ->
     case whereis(cover_server) of
@@ -43,6 +44,18 @@ smoke_disasm(File) when is_list(File) ->
     Res = beam_disasm:file(File),
     {beam_file,_Mod} = {element(1, Res),element(2, Res)}.
 
+parallel() ->
+    case ?t:is_cover() orelse erlang:system_info(schedulers) =:= 1 of
+	true -> [];
+	false -> [parallel]
+    end.
+
+uniq() ->
+    U0 = erlang:ref_to_list(make_ref()),
+    U1 = re:replace(U0, "^#Ref", ""),
+    U = re:replace(U1, "[^[A-Za-z0-9_]+", "_", [global]),
+    re:replace(U, "_*$", "", [{return,list}]).
+
 %% Retrieve the "interesting" compiler options (options for optimization
 %% and compatibility) for the given module.
 
diff --git a/lib/compiler/test/trycatch_SUITE.erl b/lib/compiler/test/trycatch_SUITE.erl
index 29119c0f5d..4530d08c77 100644
--- a/lib/compiler/test/trycatch_SUITE.erl
+++ b/lib/compiler/test/trycatch_SUITE.erl
@@ -32,13 +32,15 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [basic, lean_throw, try_of, try_after, catch_oops,
-     after_oops, eclectic, rethrow, nested_of, nested_catch,
-     nested_after, nested_horrid, last_call_optimization,
-     bool, plain_catch_coverage, andalso_orelse, get_in_try].
+    [{group,p}].
 
 groups() -> 
-    [].
+    [{p,test_lib:parallel(),
+      [basic,lean_throw,try_of,try_after,catch_oops,
+       after_oops,eclectic,rethrow,nested_of,nested_catch,
+       nested_after,nested_horrid,last_call_optimization,
+       bool,plain_catch_coverage,andalso_orelse,get_in_try]}].
+
 
 init_per_suite(Config) ->
     Config.
diff --git a/lib/compiler/test/warnings_SUITE.erl b/lib/compiler/test/warnings_SUITE.erl
index f6a572abfa..9ce0df5ec4 100644
--- a/lib/compiler/test/warnings_SUITE.erl
+++ b/lib/compiler/test/warnings_SUITE.erl
@@ -55,12 +55,13 @@ suite() -> [{ct_hooks,[ts_install_cth]}].
 
 all() -> 
     test_lib:recompile(?MODULE),
-    [pattern, pattern2, pattern3, pattern4, guard,
-     bad_arith, bool_cases, bad_apply, files, effect,
-     bin_opt_info, bin_construction].
+    [{group,p}].
 
 groups() -> 
-    [].
+    [{p,test_lib:parallel(),
+      [pattern,pattern2,pattern3,pattern4,guard,
+       bad_arith,bool_cases,bad_apply,files,effect,
+       bin_opt_info,bin_construction]}].
 
 init_per_suite(Config) ->
     Config.
@@ -556,9 +557,10 @@ run(Config, Tests) ->
 %% Compiles a test module and returns the list of errors and warnings.
 
 run_test(Conf, Test0, Warnings) ->
-    Filename = 'warnings_test.erl',
+    Mod = "warnings_"++test_lib:uniq(),
+    Filename = Mod ++ ".erl",
     ?line DataDir = ?privdir,
-    ?line Test = ["-module(warnings_test). ", Test0],
+    Test = ["-module(", Mod, "). ", Test0],
     ?line File = filename:join(DataDir, Filename),
     ?line Opts = [binary,export_all,return|Warnings],
     ?line ok = file:write_file(File, Test),