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-rw-r--r--erts/doc/src/erl.xml24
-rw-r--r--erts/emulator/beam/erl_alloc.c18
-rw-r--r--erts/emulator/beam/erl_init.c59
-rw-r--r--erts/emulator/beam/erl_process.c5
-rw-r--r--erts/emulator/beam/erl_process.h2
-rw-r--r--erts/emulator/beam/erl_ptab.c342
-rw-r--r--erts/emulator/beam/erl_ptab.h13
-rwxr-xr-xerts/emulator/beam/global.h2
-rw-r--r--erts/emulator/beam/io.c6
-rw-r--r--erts/emulator/test/process_SUITE.erl12
10 files changed, 352 insertions, 131 deletions
diff --git a/erts/doc/src/erl.xml b/erts/doc/src/erl.xml
index 814b904de3..2b2d604c9d 100644
--- a/erts/doc/src/erl.xml
+++ b/erts/doc/src/erl.xml
@@ -657,10 +657,11 @@
<p>Se also <seealso marker="stdlib:io#printable_range/0">
io:printable_range/0</seealso>.</p>
</item>
- <tag><marker id="+P"/><marker id="max_processes"><c><![CDATA[+P Number]]></c></marker></tag>
+ <tag><marker id="+P"/><marker id="max_processes"><c><![CDATA[+P Number|legacy]]></c></marker></tag>
<item>
<p>Sets the maximum number of simultaneously existing processes for this
- system. Valid range for <c>Number</c> is <c>[1024-134217727]</c></p>
+ system if a <c>Number</c> is passed as value. Valid range for
+ <c>Number</c> is <c>[1024-134217727]</c></p>
<p><em>NOTE</em>: The actual maximum chosen may be much larger than
the <c>Number</c> passed. Currently the runtime system often,
but not always, chooses a value that is a power of 2. This might,
@@ -668,11 +669,19 @@
checked by calling
<seealso marker="erlang#system_info_process_limit">erlang:system_info(process_limit)</seealso>.</p>
<p>The default value is <c>262144</c></p>
+ <p>If <c>legacy</c> is passed as value, the legacy algorithm for
+ allocation of process identifiers will be used. Using the legacy
+ algorithm, identifiers will be allocated in a strictly increasing
+ fashion until largest possible identifier has been reached. Note that
+ this algorithm suffers from performance issues and can under certain
+ circumstances be extremely expensive. The legacy algoritm is deprecated,
+ and the <c>legacy</c> option is scheduled for removal in OTP-R18.</p>
</item>
- <tag><marker id="+Q"/><marker id="max_ports"><c><![CDATA[+Q Number]]></c></marker></tag>
+ <tag><marker id="+Q"/><marker id="max_ports"><c><![CDATA[+Q Number|legacy]]></c></marker></tag>
<item>
<p>Sets the maximum number of simultaneously existing ports for this
- system. Valid range for <c>Number</c> is <c>[1024-134217727]</c></p>
+ system if a Number is passed as value. Valid range for <c>Number</c>
+ is <c>[1024-134217727]</c></p>
<p><em>NOTE</em>: The actual maximum chosen may be much larger than
the actual <c>Number</c> passed. Currently the runtime system often,
but not always, chooses a value that is a power of 2. This might,
@@ -691,6 +700,13 @@
for setting the maximum number of simultaneously existing ports. This
environment variable is deprecated, and scheduled for removal in
OTP-R17, but can still be used.</p>
+ <p>If <c>legacy</c> is passed as value, the legacy algorithm for
+ allocation of port identifiers will be used. Using the legacy
+ algorithm, identifiers will be allocated in a strictly increasing
+ fashion until largest possible identifier has been reached. Note that
+ this algorithm suffers from performance issues and can under certain
+ circumstances be extremely expensive. The legacy algoritm is deprecated,
+ and the <c>legacy</c> option is scheduled for removal in OTP-R18.</p>
</item>
<tag><marker id="compat_rel"><c><![CDATA[+R ReleaseNumber]]></c></marker></tag>
<item>
diff --git a/erts/emulator/beam/erl_alloc.c b/erts/emulator/beam/erl_alloc.c
index 9de4ef1ff9..403776aade 100644
--- a/erts/emulator/beam/erl_alloc.c
+++ b/erts/emulator/beam/erl_alloc.c
@@ -2176,7 +2176,6 @@ erts_memory(int *print_to_p, void *print_to_arg, void *proc, Eterm earg)
if (want_tot_or_sys || want.processes || want.processes_used) {
- int max_processes = erts_ptab_max(&erts_proc);
UWord tmp;
if (ERTS_MEM_NEED_ALL_ALCU)
@@ -2186,7 +2185,7 @@ erts_memory(int *print_to_p, void *print_to_arg, void *proc, Eterm earg)
fi, ERTS_ALC_NO_FIXED_SIZES);
tmp = alcu_size(ERTS_ALC_A_EHEAP, NULL, 0);
}
- tmp += max_processes*sizeof(erts_smp_atomic_t);
+ tmp += erts_ptab_mem_size(&erts_proc);
tmp += erts_bif_timer_memory_size();
tmp += erts_tot_link_lh_size();
@@ -2312,13 +2311,11 @@ struct aa_values {
Eterm
erts_allocated_areas(int *print_to_p, void *print_to_arg, void *proc)
{
-#define MAX_AA_VALUES (23)
+#define MAX_AA_VALUES (24)
struct aa_values values[MAX_AA_VALUES];
Eterm res = THE_NON_VALUE;
int i, length;
Uint reserved_atom_space, atom_space;
- int max_processes = erts_ptab_max(&erts_proc);
- int max_ports = erts_ptab_max(&erts_port);
if (proc) {
ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_MAIN
@@ -2349,8 +2346,8 @@ erts_allocated_areas(int *print_to_p, void *print_to_arg, void *proc)
values[i].arity = 2;
values[i].name = "static";
- values[i].ui[0] =
- max_ports*sizeof(erts_smp_atomic_t) /* Port table */
+ values[i].ui[0] =
+ sizeof(ErtsPTab)*2 /* proc & port tables */
+ erts_timer_wheel_memory_size(); /* Timer wheel */
i++;
@@ -2429,7 +2426,12 @@ erts_allocated_areas(int *print_to_p, void *print_to_arg, void *proc)
values[i].arity = 2;
values[i].name = "process_table";
- values[i].ui[0] = max_processes*sizeof(Process*);
+ values[i].ui[0] = erts_ptab_mem_size(&erts_proc);
+ i++;
+
+ values[i].arity = 2;
+ values[i].name = "port_table";
+ values[i].ui[0] = erts_ptab_mem_size(&erts_port);
i++;
values[i].arity = 2;
diff --git a/erts/emulator/beam/erl_init.c b/erts/emulator/beam/erl_init.c
index e6a96d427f..b5bac2151d 100644
--- a/erts/emulator/beam/erl_init.c
+++ b/erts/emulator/beam/erl_init.c
@@ -131,8 +131,10 @@ extern void ConWaitForExit(void);
static void erl_init(int ncpu,
int proc_tab_sz,
+ int legacy_proc_tab,
int port_tab_sz,
- int port_tab_sz_ignore_files);
+ int port_tab_sz_ignore_files,
+ int legacy_port_tab);
static erts_atomic_t exiting;
@@ -280,7 +282,9 @@ erts_short_init(void)
int ncpu = early_init(NULL, NULL);
erl_init(ncpu,
ERTS_DEFAULT_MAX_PROCESSES,
+ 0,
ERTS_DEFAULT_MAX_PORTS,
+ 0,
0);
erts_initialized = 1;
}
@@ -288,8 +292,10 @@ erts_short_init(void)
static void
erl_init(int ncpu,
int proc_tab_sz,
+ int legacy_proc_tab,
int port_tab_sz,
- int port_tab_sz_ignore_files)
+ int port_tab_sz_ignore_files,
+ int legacy_port_tab)
{
init_benchmarking();
@@ -297,7 +303,7 @@ erl_init(int ncpu,
erts_init_gc();
erts_init_time();
erts_init_sys_common_misc();
- erts_init_process(ncpu, proc_tab_sz);
+ erts_init_process(ncpu, proc_tab_sz, legacy_proc_tab);
erts_init_scheduling(no_schedulers,
no_schedulers_online);
erts_init_cpu_topology(); /* Must be after init_scheduling */
@@ -327,7 +333,7 @@ erl_init(int ncpu,
init_dist();
erl_drv_thr_init();
erts_init_async();
- erts_init_io(port_tab_sz, port_tab_sz_ignore_files);
+ erts_init_io(port_tab_sz, port_tab_sz_ignore_files, legacy_port_tab);
init_load();
erts_init_bif();
erts_init_bif_chksum();
@@ -923,6 +929,9 @@ erl_start(int argc, char **argv)
int proc_tab_sz = ERTS_DEFAULT_MAX_PROCESSES;
int port_tab_sz = ERTS_DEFAULT_MAX_PORTS;
int port_tab_sz_ignore_files = 0;
+ int legacy_proc_tab = 0;
+ int legacy_port_tab = 0;
+
envbufsz = sizeof(envbuf);
if (erts_sys_getenv_raw(ERL_MAX_ETS_TABLES_ENV, envbuf, &envbufsz) == 0)
@@ -1268,27 +1277,35 @@ erl_start(int argc, char **argv)
case 'P': /* set maximum number of processes */
arg = get_arg(argv[i]+2, argv[i+1], &i);
- errno = 0;
- proc_tab_sz = strtol(arg, NULL, 10);
- if (errno != 0
- || proc_tab_sz < ERTS_MIN_PROCESSES
- || ERTS_MAX_PROCESSES < proc_tab_sz) {
- erts_fprintf(stderr, "bad number of processes %s\n", arg);
- erts_usage();
+ if (strcmp(arg, "legacy") == 0)
+ legacy_proc_tab = 1;
+ else {
+ errno = 0;
+ proc_tab_sz = strtol(arg, NULL, 10);
+ if (errno != 0
+ || proc_tab_sz < ERTS_MIN_PROCESSES
+ || ERTS_MAX_PROCESSES < proc_tab_sz) {
+ erts_fprintf(stderr, "bad number of processes %s\n", arg);
+ erts_usage();
+ }
}
break;
case 'Q': /* set maximum number of ports */
arg = get_arg(argv[i]+2, argv[i+1], &i);
- errno = 0;
- port_tab_sz = strtol(arg, NULL, 10);
- if (errno != 0
- || port_tab_sz < ERTS_MIN_PROCESSES
- || ERTS_MAX_PROCESSES < port_tab_sz) {
- erts_fprintf(stderr, "bad number of ports %s\n", arg);
- erts_usage();
+ if (strcmp(arg, "legacy") == 0)
+ legacy_port_tab = 1;
+ else {
+ errno = 0;
+ port_tab_sz = strtol(arg, NULL, 10);
+ if (errno != 0
+ || port_tab_sz < ERTS_MIN_PROCESSES
+ || ERTS_MAX_PROCESSES < port_tab_sz) {
+ erts_fprintf(stderr, "bad number of ports %s\n", arg);
+ erts_usage();
+ }
+ port_tab_sz_ignore_files = 1;
}
- port_tab_sz_ignore_files = 1;
break;
case 'S' : /* Was handled in early_init() just read past it */
@@ -1642,8 +1659,10 @@ erl_start(int argc, char **argv)
erl_init(ncpu,
proc_tab_sz,
+ legacy_proc_tab,
port_tab_sz,
- port_tab_sz_ignore_files);
+ port_tab_sz_ignore_files,
+ legacy_port_tab);
load_preloaded();
erts_end_staging_code_ix();
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index 7415a5721f..bb3e787401 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -485,7 +485,7 @@ release_process(void *vproc)
/* initialize the scheduler */
void
-erts_init_process(int ncpu, int proc_tab_size)
+erts_init_process(int ncpu, int proc_tab_size, int legacy_proc_tab)
{
#ifdef ERTS_SMP
@@ -505,7 +505,8 @@ erts_init_process(int ncpu, int proc_tab_size)
(ErtsPTabElementCommon *) &erts_invalid_process.common,
proc_tab_size,
sizeof(Process),
- "process_table");
+ "process_table",
+ legacy_proc_tab);
last_reductions = 0;
last_exact_reductions = 0;
diff --git a/erts/emulator/beam/erl_process.h b/erts/emulator/beam/erl_process.h
index 5a1f6bbe8d..6ef1a0073d 100644
--- a/erts/emulator/beam/erl_process.h
+++ b/erts/emulator/beam/erl_process.h
@@ -1352,7 +1352,7 @@ void erts_schedule_multi_misc_aux_work(int ignore_self,
erts_aint32_t erts_set_aux_work_timeout(int, erts_aint32_t, int);
void erts_sched_notify_check_cpu_bind(void);
Uint erts_active_schedulers(void);
-void erts_init_process(int, int);
+void erts_init_process(int, int, int);
Eterm erts_process_status(Process *, ErtsProcLocks, Process *, Eterm);
Uint erts_run_queues_len(Uint *);
void erts_add_to_runq(Process *);
diff --git a/erts/emulator/beam/erl_ptab.c b/erts/emulator/beam/erl_ptab.c
index 5bbc71c659..8da135b2c8 100644
--- a/erts/emulator/beam/erl_ptab.c
+++ b/erts/emulator/beam/erl_ptab.c
@@ -34,6 +34,8 @@
typedef struct ErtsPTabListBifData_ ErtsPTabListBifData;
+#define ERTS_PTAB_NEW_MAX_RESERVE_FAIL 1000
+
#define ERTS_PTAB_LIST_BIF_TAB_INSPECT_INDICES_PER_RED 25
#define ERTS_PTAB_LIST_BIF_TAB_CHUNK_SIZE 1000
#define ERTS_PTAB_LIST_BIF_MIN_START_REDS \
@@ -415,6 +417,27 @@ last_data_cmp(Uint64 ld1, Uint64 ld2)
#define ERTS_PTAB_LastData2EtermData(LD) \
((Eterm) ((LD) & ~(~((Uint64) 0) << ERTS_PTAB_ID_DATA_SIZE)))
+static ERTS_INLINE Uint32
+ix_to_free_id_data_ix(ErtsPTab *ptab, Uint32 ix)
+{
+ Uint32 dix;
+
+ dix = ((ix & ptab->r.o.dix_cl_mask) << ptab->r.o.dix_cl_shift);
+ dix += ((ix >> ptab->r.o.dix_cli_shift) & ptab->r.o.dix_cli_mask);
+ ASSERT(0 <= dix && dix < ptab->r.o.max);
+ return dix;
+}
+
+UWord
+erts_ptab_mem_size(ErtsPTab *ptab)
+{
+ UWord size = ptab->r.o.max*sizeof(erts_smp_atomic_t);
+ if (ptab->r.o.free_id_data)
+ size += ptab->r.o.max*sizeof(Uint32);
+ return size;
+}
+
+
void
erts_ptab_init_table(ErtsPTab *ptab,
ErtsAlcType_t atype,
@@ -422,10 +445,11 @@ erts_ptab_init_table(ErtsPTab *ptab,
ErtsPTabElementCommon *invalid_element,
int size,
UWord element_size,
- char *name)
+ char *name,
+ int legacy)
{
- size_t tab_sz;
- int bits;
+ size_t tab_sz, alloc_sz;
+ Uint32 bits, cl, cli, ix, ix_per_cache_line, tab_cache_lines;
char *tab_end;
erts_smp_atomic_t *tab_entry;
erts_smp_rwmtx_opt_t rwmtx_opts = ERTS_SMP_RWMTX_OPT_DEFAULT_INITER;
@@ -448,7 +472,10 @@ erts_ptab_init_table(ErtsPTab *ptab,
ptab->r.o.max = size;
tab_sz = ERTS_ALC_CACHE_LINE_ALIGN_SIZE(size*sizeof(erts_smp_atomic_t));
- ptab->r.o.tab = erts_alloc_permanent_cache_aligned(atype, tab_sz);
+ alloc_sz = tab_sz;
+ if (!legacy)
+ alloc_sz += ERTS_ALC_CACHE_LINE_ALIGN_SIZE(size*sizeof(Uint32));
+ ptab->r.o.tab = erts_alloc_permanent_cache_aligned(atype, alloc_sz);
tab_end = ((char *) ptab->r.o.tab) + tab_sz;
tab_entry = ptab->r.o.tab;
while (tab_end > ((char *) tab_entry)) {
@@ -456,28 +483,57 @@ erts_ptab_init_table(ErtsPTab *ptab,
tab_entry++;
}
- ptab->r.o.tab_cache_lines = tab_sz/ERTS_CACHE_LINE_SIZE;
- ptab->r.o.pix_per_cache_line = (ERTS_CACHE_LINE_SIZE
- / sizeof(erts_smp_atomic_t));
+ tab_cache_lines = tab_sz/ERTS_CACHE_LINE_SIZE;
+ ix_per_cache_line = (ERTS_CACHE_LINE_SIZE/sizeof(erts_smp_atomic_t));
ASSERT((ptab->r.o.max & (ptab->r.o.max - 1)) == 0); /* power of 2 */
- ASSERT((ptab->r.o.pix_per_cache_line
- & (ptab->r.o.pix_per_cache_line - 1)) == 0); /* power of 2 */
- ASSERT((ptab->r.o.tab_cache_lines
- & (ptab->r.o.tab_cache_lines - 1)) == 0); /* power of 2 */
-
- ptab->r.o.pix_mask
- = (1 << bits) - 1;
- ptab->r.o.pix_cl_mask
- = ptab->r.o.tab_cache_lines-1;
- ptab->r.o.pix_cl_shift
- = erts_fit_in_bits_int32(ptab->r.o.pix_per_cache_line-1);
- ptab->r.o.pix_cli_shift
- = erts_fit_in_bits_int32(ptab->r.o.pix_cl_mask);
- ptab->r.o.pix_cli_mask
- = (1 << (bits - ptab->r.o.pix_cli_shift)) - 1;
+ ASSERT((ix_per_cache_line & (ix_per_cache_line - 1)) == 0); /* power of 2 */
+ ASSERT((tab_cache_lines & (tab_cache_lines - 1)) == 0); /* power of 2 */
+
+ ptab->r.o.pix_mask = (1 << bits) - 1;
+ ptab->r.o.pix_cl_mask = tab_cache_lines-1;
+ ptab->r.o.pix_cl_shift = erts_fit_in_bits_int32(ix_per_cache_line-1);
+ ptab->r.o.pix_cli_shift = erts_fit_in_bits_int32(ptab->r.o.pix_cl_mask);
+ ptab->r.o.pix_cli_mask = (1 << (bits - ptab->r.o.pix_cli_shift)) - 1;
ASSERT(ptab->r.o.pix_cl_shift + ptab->r.o.pix_cli_shift == bits);
+ if (legacy) {
+ ptab->r.o.free_id_data = NULL;
+ ptab->r.o.dix_cl_mask = 0;
+ ptab->r.o.dix_cl_shift = 0;
+ ptab->r.o.dix_cli_shift = 0;
+ ptab->r.o.dix_cli_mask = 0;
+ }
+ else {
+
+ tab_sz = ERTS_ALC_CACHE_LINE_ALIGN_SIZE(size*sizeof(Uint32));
+ ptab->r.o.free_id_data = (Uint32 *) tab_end;
+
+ tab_cache_lines = tab_sz/ERTS_CACHE_LINE_SIZE;
+ ix_per_cache_line = (ERTS_CACHE_LINE_SIZE/sizeof(Uint32));
+
+ ptab->r.o.dix_cl_mask = tab_cache_lines-1;
+ ptab->r.o.dix_cl_shift = erts_fit_in_bits_int32(ix_per_cache_line-1);
+ ptab->r.o.dix_cli_shift = erts_fit_in_bits_int32(ptab->r.o.dix_cl_mask);
+ ptab->r.o.dix_cli_mask = (1 << (bits - ptab->r.o.dix_cli_shift)) - 1;
+
+ ASSERT((ix_per_cache_line & (ix_per_cache_line - 1)) == 0); /* power of 2 */
+ ASSERT((tab_cache_lines & (tab_cache_lines - 1)) == 0); /* power of 2 */
+
+ ASSERT(ptab->r.o.dix_cl_shift + ptab->r.o.dix_cli_shift == bits);
+
+ ix = 0;
+ for (cl = 0; cl < tab_cache_lines; cl++) {
+ for (cli = 0; cli < ix_per_cache_line; cli++) {
+ ptab->r.o.free_id_data[ix] = cli*tab_cache_lines+cl;
+ ix++;
+ }
+ }
+
+ erts_smp_atomic32_init_nob(&ptab->vola.tile.aid_ix, -1);
+ erts_smp_atomic32_init_nob(&ptab->vola.tile.fid_ix, -1);
+
+ }
ptab->r.o.invalid_element = invalid_element;
ptab->r.o.invalid_data = erts_ptab_id2data(ptab, invalid_element->id);
ptab->r.o.release_element = release_element;
@@ -522,9 +578,7 @@ erts_ptab_new_element(ErtsPTab *ptab,
void *init_arg,
void (*init_ptab_el)(void *, Eterm))
{
- int pix;
- Uint64 ld, exp_ld;
- Eterm data;
+ Uint32 pix, ix, data;
erts_aint32_t count;
erts_aint_t invalid = (erts_aint_t) ptab->r.o.invalid_element;
@@ -551,62 +605,108 @@ erts_ptab_new_element(ErtsPTab *ptab,
ptab_el->u.alive.started_interval
= erts_smp_current_interval_nob(erts_ptab_interval(ptab));
- ld = last_data_read_acqb(ptab);
+ if (ptab->r.o.free_id_data) {
- /* Reserve slot */
- while (1) {
- ld++;
- pix = erts_ptab_data2pix(ptab, ERTS_PTAB_LastData2EtermData(ld));
- if (erts_smp_atomic_read_nob(&ptab->r.o.tab[pix]) == ERTS_AINT_NULL) {
- erts_aint_t val;
- val = erts_smp_atomic_cmpxchg_relb(&ptab->r.o.tab[pix],
- invalid,
- ERTS_AINT_NULL);
+ ix = (Uint32) erts_smp_atomic32_inc_read_acqb(&ptab->vola.tile.aid_ix);
+ ix = ix_to_free_id_data_ix(ptab, ix);
+
+ data = ptab->r.o.free_id_data[ix];
+
+ init_ptab_el(init_arg, (Eterm) data);
+
+#ifdef ERTS_SMP
+ erts_smp_atomic32_init_nob(&ptab_el->refc, 1);
+#endif
+
+ pix = erts_ptab_data2pix(ptab, (Eterm) data);
+
+#ifdef DEBUG
+ ASSERT(ERTS_AINT_NULL == erts_smp_atomic_xchg_relb(&ptab->r.o.tab[pix],
+ (erts_aint_t) ptab_el));
+#else
+ erts_smp_atomic_set_relb(&ptab->r.o.tab[pix], (erts_aint_t) ptab_el);
+#endif
+
+ erts_ptab_runlock(ptab);
- if (ERTS_AINT_NULL == val)
- break;
- }
}
+ else {
+ int rlocked = ERTS_PTAB_NEW_MAX_RESERVE_FAIL;
+ Uint64 ld, exp_ld;
+ /* Deprecated legacy algorithm... */
+
+ restart:
+
+ ptab_el->u.alive.started_interval
+ = erts_smp_current_interval_nob(erts_ptab_interval(ptab));
- data = ERTS_PTAB_LastData2EtermData(ld);
+ ld = last_data_read_acqb(ptab);
+
+ /* Reserve slot */
+ while (1) {
+ ld++;
+ pix = erts_ptab_data2pix(ptab, ERTS_PTAB_LastData2EtermData(ld));
+ if (erts_smp_atomic_read_nob(&ptab->r.o.tab[pix])
+ == ERTS_AINT_NULL) {
+ erts_aint_t val;
+ val = erts_smp_atomic_cmpxchg_relb(&ptab->r.o.tab[pix],
+ invalid,
+ ERTS_AINT_NULL);
+
+ if (ERTS_AINT_NULL == val)
+ break;
+ }
+ if (rlocked && --rlocked == 0) {
+ erts_ptab_runlock(ptab);
+ erts_ptab_rwlock(ptab);
+ goto restart;
+ }
+ }
- if (data == ptab->r.o.invalid_data) {
- /* Do not use invalid data; fix it... */
- ld += ptab->r.o.max;
- ASSERT(pix == erts_ptab_data2pix(ptab,
- ERTS_PTAB_LastData2EtermData(ld)));
data = ERTS_PTAB_LastData2EtermData(ld);
- ASSERT(data != ptab->r.o.invalid_data);
- }
- exp_ld = last_data_read_nob(ptab);
+ if (data == ptab->r.o.invalid_data) {
+ /* Do not use invalid data; fix it... */
+ ld += ptab->r.o.max;
+ ASSERT(pix == erts_ptab_data2pix(ptab,
+ ERTS_PTAB_LastData2EtermData(ld)));
+ data = ERTS_PTAB_LastData2EtermData(ld);
+ ASSERT(data != ptab->r.o.invalid_data);
+ }
- /* Move last data forward */
- while (1) {
- Uint64 act_ld;
- if (last_data_cmp(ld, exp_ld) < 0)
- break;
- act_ld = last_data_cmpxchg_relb(ptab, ld, exp_ld);
- if (act_ld == exp_ld)
- break;
- exp_ld = act_ld;
- }
+ exp_ld = last_data_read_nob(ptab);
+
+ /* Move last data forward */
+ while (1) {
+ Uint64 act_ld;
+ if (last_data_cmp(ld, exp_ld) < 0)
+ break;
+ act_ld = last_data_cmpxchg_relb(ptab, ld, exp_ld);
+ if (act_ld == exp_ld)
+ break;
+ exp_ld = act_ld;
+ }
- init_ptab_el(init_arg, data);
+ init_ptab_el(init_arg, data);
#ifdef ERTS_SMP
- erts_smp_atomic32_init_nob(&ptab_el->refc, 1);
+ erts_smp_atomic32_init_nob(&ptab_el->refc, 1);
#endif
- /* Move into slot reserved */
+ /* Move into slot reserved */
#ifdef DEBUG
- ASSERT(invalid == erts_smp_atomic_xchg_relb(&ptab->r.o.tab[pix],
+ ASSERT(invalid == erts_smp_atomic_xchg_relb(&ptab->r.o.tab[pix],
(erts_aint_t) ptab_el));
#else
- erts_smp_atomic_set_relb(&ptab->r.o.tab[pix], (erts_aint_t) ptab_el);
+ erts_smp_atomic_set_relb(&ptab->r.o.tab[pix], (erts_aint_t) ptab_el);
#endif
- erts_ptab_runlock(ptab);
+ if (rlocked)
+ erts_ptab_runlock(ptab);
+ else
+ erts_ptab_rwunlock(ptab);
+
+ }
return 1;
}
@@ -647,7 +747,9 @@ erts_ptab_delete_element(ErtsPTab *ptab,
ErtsPTabElementCommon *ptab_el)
{
int maybe_save;
- int pix = erts_ptab_id2pix(ptab, ptab_el->id);
+ Uint32 pix, ix, data;
+
+ pix = erts_ptab_id2pix(ptab, ptab_el->id);
ASSERT(erts_get_scheduler_id()); /* *Need* to be a scheduler */
@@ -660,6 +762,26 @@ erts_ptab_delete_element(ErtsPTab *ptab,
erts_smp_atomic_set_relb(&ptab->r.o.tab[pix], ERTS_AINT_NULL);
+ if (ptab->r.o.free_id_data) {
+
+ /* Next data for this slot... */
+ data = (Uint32) erts_ptab_id2data(ptab, ptab_el->id);
+ data += ptab->r.o.max;
+ data &= ~(~((Uint32) 0) << ERTS_PTAB_ID_DATA_SIZE);
+ if (data == ptab->r.o.invalid_data) { /* make sure not invalid */
+ data += ptab->r.o.max;
+ data &= ~(~((Uint32) 0) << ERTS_PTAB_ID_DATA_SIZE);
+ }
+
+ ASSERT(data != ptab->r.o.invalid_data);
+ ASSERT(pix == erts_ptab_data2pix(ptab, data));
+
+ ix = (Uint32) erts_smp_atomic32_inc_read_relb(&ptab->vola.tile.fid_ix);
+ ix = ix_to_free_id_data_ix(ptab, ix);
+
+ ptab->r.o.free_id_data[ix] = data;
+ }
+
ASSERT(erts_smp_atomic32_read_nob(&ptab->vola.tile.count) > 0);
erts_smp_atomic32_dec_relb(&ptab->vola.tile.count);
@@ -1280,42 +1402,86 @@ erts_ptab_test_next_id(ErtsPTab *ptab, int set, Uint next)
erts_ptab_rwlock(ptab);
- if (!set)
- ld = last_data_read_nob(ptab);
- else {
+ if (ptab->r.o.free_id_data) {
+ Uint32 aid_ix, dix;
- ld = (Uint64) next;
- data = ERTS_PTAB_LastData2EtermData(ld);
- if (ptab->r.o.invalid_data == data) {
- ld += ptab->r.o.max;
- ASSERT(erts_ptab_data2pix(ptab, data)
- == erts_ptab_data2pix(ptab,
- ERTS_PTAB_LastData2EtermData(ld)));
+ if (set) {
+ Uint32 max_ix, ser, num, start;
+ max_ix = ptab->r.o.max - 1;
+ ser = next & ~max_ix;
+ start = num = next & max_ix;
+
+ aid_ix = (Uint32) erts_smp_atomic32_read_nob(&ptab->vola.tile.aid_ix) + 1;
+
+ do {
+ Uint32 pix = erts_ptab_data2pix(ptab, num);
+ if (ERTS_AINT_NULL == erts_ptab_pix2intptr_nob(ptab, pix)) {
+ dix = ix_to_free_id_data_ix(ptab, aid_ix);
+ ptab->r.o.free_id_data[dix] = ser + num;
+ ASSERT(pix == erts_ptab_data2pix(ptab, ser+num));
+ if (aid_ix == max_ix)
+ aid_ix = 0;
+ else
+ aid_ix++;
+ }
+ if (num == max_ix)
+ num = 0;
+ else
+ num++;
+ } while (num != start);
+
+#ifdef DEBUG
+ if (aid_ix == 0)
+ aid_ix = max_ix;
+ else
+ aid_ix--;
+ ASSERT((aid_ix & max_ix) == (((Uint32) erts_atomic32_read_nob(&ptab->vola.tile.fid_ix)) & max_ix));
+#endif
}
- last_data_set_relb(ptab, ld);
+
+ aid_ix = (Uint32) erts_smp_atomic32_read_nob(&ptab->vola.tile.aid_ix) + 1;
+ dix = ix_to_free_id_data_ix(ptab, aid_ix);
+ res = (Sint) ptab->r.o.free_id_data[dix];
}
+ else {
+ /* Deprecated legacy algorithm... */
+ if (!set)
+ ld = last_data_read_nob(ptab);
+ else {
- while (1) {
- int pix;
- ld++;
- pix = (int) (ld % ptab->r.o.max);
- if (first_pix < 0)
- first_pix = pix;
- else if (pix == first_pix) {
- res = -1;
- break;
- }
- if (ERTS_AINT_NULL == erts_ptab_pix2intptr_nob(ptab, pix)) {
+ ld = (Uint64) next;
data = ERTS_PTAB_LastData2EtermData(ld);
if (ptab->r.o.invalid_data == data) {
ld += ptab->r.o.max;
ASSERT(erts_ptab_data2pix(ptab, data)
== erts_ptab_data2pix(ptab,
ERTS_PTAB_LastData2EtermData(ld)));
+ }
+ last_data_set_relb(ptab, ld);
+ }
+
+ while (1) {
+ int pix;
+ ld++;
+ pix = (int) (ld % ptab->r.o.max);
+ if (first_pix < 0)
+ first_pix = pix;
+ else if (pix == first_pix) {
+ res = -1;
+ break;
+ }
+ if (ERTS_AINT_NULL == erts_ptab_pix2intptr_nob(ptab, pix)) {
data = ERTS_PTAB_LastData2EtermData(ld);
+ if (ptab->r.o.invalid_data == data) {
+ ld += ptab->r.o.max;
+ ASSERT(erts_ptab_data2pix(ptab, data)
+ == erts_ptab_data2pix(ptab,
+ ERTS_PTAB_LastData2EtermData(ld)));
+ data = ERTS_PTAB_LastData2EtermData(ld);
+ }
+ res = data;
+ break;
}
- res = data;
- break;
}
}
diff --git a/erts/emulator/beam/erl_ptab.h b/erts/emulator/beam/erl_ptab.h
index 7fa1251900..84ff7d0de4 100644
--- a/erts/emulator/beam/erl_ptab.h
+++ b/erts/emulator/beam/erl_ptab.h
@@ -94,18 +94,23 @@ typedef struct {
erts_smp_atomic_t last_data;
#endif
erts_smp_atomic32_t count;
+ erts_smp_atomic32_t aid_ix;
+ erts_smp_atomic32_t fid_ix;
} ErtsPTabVolatileData;
typedef struct {
erts_smp_atomic_t *tab;
+ Uint32 *free_id_data;
Uint32 max;
- Uint32 tab_cache_lines;
- Uint32 pix_per_cache_line;
Uint32 pix_mask;
Uint32 pix_cl_mask;
Uint32 pix_cl_shift;
Uint32 pix_cli_mask;
Uint32 pix_cli_shift;
+ Uint32 dix_cl_mask;
+ Uint32 dix_cl_shift;
+ Uint32 dix_cli_mask;
+ Uint32 dix_cli_shift;
ErtsPTabElementCommon *invalid_element;
Eterm invalid_data;
void (*release_element)(void *);
@@ -179,7 +184,8 @@ void erts_ptab_init_table(ErtsPTab *ptab,
ErtsPTabElementCommon *invalid_element,
int size,
UWord element_size,
- char *name);
+ char *name,
+ int legacy);
int erts_ptab_new_element(ErtsPTab *ptab,
ErtsPTabElementCommon *ptab_el,
void *init_arg,
@@ -187,6 +193,7 @@ int erts_ptab_new_element(ErtsPTab *ptab,
void erts_ptab_delete_element(ErtsPTab *ptab,
ErtsPTabElementCommon *ptab_el);
int erts_ptab_initialized(ErtsPTab *ptab);
+UWord erts_ptab_mem_size(ErtsPTab *ptab);
ERTS_GLB_INLINE erts_interval_t *erts_ptab_interval(ErtsPTab *ptab);
ERTS_GLB_INLINE int erts_ptab_max(ErtsPTab *ptab);
diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h
index 012c1c7e6a..c900cdca39 100755
--- a/erts/emulator/beam/global.h
+++ b/erts/emulator/beam/global.h
@@ -724,7 +724,7 @@ int erts_add_driver_entry(ErlDrvEntry *drv, DE_Handle *handle, int driver_list_l
void erts_destroy_driver(erts_driver_t *drv);
int erts_save_suspend_process_on_port(Port*, Process*);
Port *erts_open_driver(erts_driver_t*, Eterm, char*, SysDriverOpts*, int *, int *);
-void erts_init_io(int, int);
+void erts_init_io(int, int, int);
void erts_raw_port_command(Port*, byte*, Uint);
void driver_report_exit(ErlDrvPort, int);
LineBuf* allocate_linebuf(int);
diff --git a/erts/emulator/beam/io.c b/erts/emulator/beam/io.c
index b6b7b47bd6..13cff24b95 100644
--- a/erts/emulator/beam/io.c
+++ b/erts/emulator/beam/io.c
@@ -2707,7 +2707,8 @@ erts_port_link(Process *c_p, Port *prt, Eterm to, Eterm *refp)
}
void erts_init_io(int port_tab_size,
- int port_tab_size_ignore_files)
+ int port_tab_size_ignore_files,
+ int legacy_port_tab)
{
ErlDrvEntry** dp;
UWord common_element_size;
@@ -2750,7 +2751,8 @@ void erts_init_io(int port_tab_size,
(ErtsPTabElementCommon *) &erts_invalid_port.common,
port_tab_size,
common_element_size, /* Doesn't need to be excact */
- "port_table");
+ "port_table",
+ legacy_port_tab);
erts_smp_atomic_init_nob(&erts_bytes_out, 0);
erts_smp_atomic_init_nob(&erts_bytes_in, 0);
diff --git a/erts/emulator/test/process_SUITE.erl b/erts/emulator/test/process_SUITE.erl
index 863cd2d654..72f3e8fe85 100644
--- a/erts/emulator/test/process_SUITE.erl
+++ b/erts/emulator/test/process_SUITE.erl
@@ -1494,6 +1494,7 @@ processes_bif_cleaner() ->
spawn_initial_hangarounds(Cleaner) ->
TabSz = erlang:system_info(process_limit),
+ erts_debug:set_internal_state(next_pid,TabSz),
spawn_initial_hangarounds(Cleaner,
TabSz,
TabSz*2,
@@ -1538,14 +1539,21 @@ hangaround(Cleaner, Type) ->
spawn_initial_hangarounds(_Cleaner, NP, Max, Len, HAs) when NP > Max ->
{Len, HAs};
spawn_initial_hangarounds(Cleaner, NP, Max, Len, HAs) ->
- erts_debug:set_internal_state(next_pid,NP),
+ Skip = 30,
HA1 = spawn_opt(?MODULE, hangaround, [Cleaner, initial_hangaround],
[{priority, low}]),
HA2 = spawn_opt(?MODULE, hangaround, [Cleaner, initial_hangaround],
[{priority, normal}]),
HA3 = spawn_opt(?MODULE, hangaround, [Cleaner, initial_hangaround],
[{priority, high}]),
- spawn_initial_hangarounds(Cleaner, NP+30, Max, Len+3, [HA1,HA2,HA3|HAs]).
+ spawn_drop(Skip),
+ spawn_initial_hangarounds(Cleaner, NP+Skip, Max, Len+3, [HA1,HA2,HA3|HAs]).
+
+spawn_drop(N) when N =< 0 ->
+ ok;
+spawn_drop(N) ->
+ spawn(fun () -> ok end),
+ spawn_drop(N-1).
do_processes(WantReds) ->
erts_debug:set_internal_state(reds_left, WantReds),
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-29 05:14:52 +0000