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Diffstat (limited to 'erts/emulator/beam/erl_process.c')
-rw-r--r--erts/emulator/beam/erl_process.c92
1 files changed, 69 insertions, 23 deletions
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index e96d5c4ccd..685004f267 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -5883,6 +5883,9 @@ schedule_out_process(ErtsRunQueue *c_rq, erts_aint32_t state, Process *p, Proces
case ERTS_ENQUEUE_NOT:
if (erts_system_profile_flags.runnable_procs) {
+ /* Status lock prevents out of order "runnable proc" trace msgs */
+ ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p));
+
if (!(a & ERTS_PSFLG_ACTIVE_SYS)
&& (!(a & ERTS_PSFLG_ACTIVE)
|| (a & ERTS_PSFLG_SUSPENDED))) {
@@ -5996,7 +5999,8 @@ change_proc_schedule_state(Process *p,
erts_aint32_t clear_state_flags,
erts_aint32_t set_state_flags,
erts_aint32_t *statep,
- erts_aint32_t *enq_prio_p)
+ erts_aint32_t *enq_prio_p,
+ ErtsProcLocks locks)
{
/*
* NOTE: ERTS_PSFLG_RUNNING, ERTS_PSFLG_RUNNING_SYS and
@@ -6005,6 +6009,11 @@ change_proc_schedule_state(Process *p,
*/
erts_aint32_t a = *statep, n;
int enqueue; /* < 0 -> use proxy */
+ unsigned int prof_runnable_procs = erts_system_profile_flags.runnable_procs;
+ unsigned int lock_status = (prof_runnable_procs
+ && !(locks & ERTS_PROC_LOCK_STATUS));
+
+ ERTS_SMP_LC_ASSERT(locks == erts_proc_lc_my_proc_locks(p));
ASSERT(!(a & ERTS_PSFLG_PROXY));
ASSERT((clear_state_flags & (ERTS_PSFLG_RUNNING
@@ -6014,6 +6023,9 @@ change_proc_schedule_state(Process *p,
| ERTS_PSFLG_RUNNING_SYS
| ERTS_PSFLG_ACTIVE_SYS)) == 0);
+ if (lock_status)
+ erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS);
+
while (1) {
erts_aint32_t e;
n = e = a;
@@ -6049,7 +6061,9 @@ change_proc_schedule_state(Process *p,
break;
}
- if (erts_system_profile_flags.runnable_procs) {
+ if (prof_runnable_procs) {
+
+ /* Status lock prevents out of order "runnable proc" trace msgs */
if (((n & (ERTS_PSFLG_SUSPENDED
| ERTS_PSFLG_ACTIVE)) == ERTS_PSFLG_ACTIVE)
@@ -6062,15 +6076,18 @@ change_proc_schedule_state(Process *p,
profile_runnable_proc(p, am_active);
}
+ if (lock_status)
+ erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS);
}
+
*statep = a;
return enqueue;
}
static ERTS_INLINE void
-schedule_process(Process *p, erts_aint32_t in_state)
+schedule_process(Process *p, erts_aint32_t in_state, ErtsProcLocks locks)
{
erts_aint32_t enq_prio = -1;
erts_aint32_t state = in_state;
@@ -6078,7 +6095,8 @@ schedule_process(Process *p, erts_aint32_t in_state)
0,
ERTS_PSFLG_ACTIVE,
&state,
- &enq_prio);
+ &enq_prio,
+ locks);
if (enqueue != ERTS_ENQUEUE_NOT)
add2runq(enqueue > 0 ? p : make_proxy_proc(NULL, p, enq_prio),
state,
@@ -6086,16 +6104,27 @@ schedule_process(Process *p, erts_aint32_t in_state)
}
void
-erts_schedule_process(Process *p, erts_aint32_t state)
+erts_schedule_process(Process *p, erts_aint32_t state, ErtsProcLocks locks)
{
- schedule_process(p, state);
+ schedule_process(p, state, locks);
}
static void
schedule_process_sys_task(Process *p, erts_aint32_t state, Process *proxy)
{
+ /*
+ * Expects status lock to be locked when called, and
+ * returns with status lock unlocked...
+ */
erts_aint32_t a = state, n, enq_prio = -1;
int enqueue; /* < 0 -> use proxy */
+ unsigned int prof_runnable_procs = erts_system_profile_flags.runnable_procs;
+
+ /* Status lock prevents out of order "runnable proc" trace msgs */
+ ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p));
+
+ if (!prof_runnable_procs)
+ erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS);
ASSERT(!(state & ERTS_PSFLG_PROXY));
@@ -6104,7 +6133,7 @@ schedule_process_sys_task(Process *p, erts_aint32_t state, Process *proxy)
n = e = a;
if (a & ERTS_PSFLG_FREE)
- return; /* We don't want to schedule free processes... */
+ goto cleanup; /* We don't want to schedule free processes... */
enqueue = ERTS_ENQUEUE_NOT;
n |= ERTS_PSFLG_ACTIVE_SYS;
@@ -6117,7 +6146,7 @@ schedule_process_sys_task(Process *p, erts_aint32_t state, Process *proxy)
goto cleanup;
}
- if (erts_system_profile_flags.runnable_procs) {
+ if (prof_runnable_procs) {
if (!(a & (ERTS_PSFLG_ACTIVE_SYS
| ERTS_PSFLG_RUNNING
@@ -6127,6 +6156,8 @@ schedule_process_sys_task(Process *p, erts_aint32_t state, Process *proxy)
profile_runnable_proc(p, am_active);
}
+ erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS);
+ prof_runnable_procs = 0;
}
if (enqueue != ERTS_ENQUEUE_NOT) {
@@ -6141,8 +6172,14 @@ schedule_process_sys_task(Process *p, erts_aint32_t state, Process *proxy)
}
cleanup:
+
+ if (prof_runnable_procs)
+ erts_smp_proc_unlock(p, ERTS_PROC_LOCK_STATUS);
+
if (proxy)
free_proxy_proc(proxy);
+
+ ERTS_SMP_LC_ASSERT(!(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p)));
}
static ERTS_INLINE int
@@ -6209,7 +6246,7 @@ suspend_process(Process *c_p, Process *p)
}
static ERTS_INLINE void
-resume_process(Process *p)
+resume_process(Process *p, ErtsProcLocks locks)
{
erts_aint32_t state, enq_prio = -1;
int enqueue;
@@ -6226,7 +6263,8 @@ resume_process(Process *p)
ERTS_PSFLG_SUSPENDED,
0,
&state,
- &enq_prio);
+ &enq_prio,
+ locks);
if (enqueue)
add2runq(enqueue > 0 ? p : make_proxy_proc(NULL, p, enq_prio),
state,
@@ -8042,7 +8080,8 @@ handle_pend_sync_suspend(Process *suspendee,
}
/* suspender is suspended waiting for suspendee to suspend;
resume suspender */
- resume_process(suspender);
+ ASSERT(suspendee != suspender);
+ resume_process(suspender, ERTS_PROC_LOCK_STATUS);
erts_smp_proc_unlock(suspender, ERTS_PROC_LOCK_STATUS);
}
}
@@ -8077,7 +8116,7 @@ pid2proc_not_running(Process *c_p, ErtsProcLocks c_p_locks,
ASSERT(c_p->flags & F_P2PNR_RESCHED);
c_p->flags &= ~F_P2PNR_RESCHED;
if (!suspend && rp)
- resume_process(rp);
+ resume_process(rp, rp_locks);
}
else {
@@ -8235,7 +8274,8 @@ handle_pend_bif_sync_suspend(Process *suspendee,
}
/* suspender is suspended waiting for suspendee to suspend;
resume suspender */
- resume_process(suspender);
+ ASSERT(suspender != suspendee);
+ resume_process(suspender, ERTS_PROC_LOCK_LINK|ERTS_PROC_LOCK_STATUS);
erts_smp_proc_unlock(suspender,
ERTS_PROC_LOCK_LINK|ERTS_PROC_LOCK_STATUS);
}
@@ -8595,7 +8635,8 @@ resume_process_1(BIF_ALIST_1)
ASSERT(ERTS_PSFLG_SUSPENDED
& erts_smp_atomic32_read_nob(&suspendee->state));
- resume_process(suspendee);
+ ASSERT(BIF_P != suspendee);
+ resume_process(suspendee, ERTS_PROC_LOCK_STATUS);
erts_smp_proc_unlock(suspendee, ERTS_PROC_LOCK_STATUS);
}
@@ -8725,7 +8766,7 @@ erts_resume(Process* process, ErtsProcLocks process_locks)
ERTS_SMP_LC_ASSERT(process_locks == erts_proc_lc_my_proc_locks(process));
if (!(process_locks & ERTS_PROC_LOCK_STATUS))
erts_smp_proc_lock(process, ERTS_PROC_LOCK_STATUS);
- resume_process(process);
+ resume_process(process, process_locks|ERTS_PROC_LOCK_STATUS);
if (!(process_locks & ERTS_PROC_LOCK_STATUS))
erts_smp_proc_unlock(process, ERTS_PROC_LOCK_STATUS);
}
@@ -8744,7 +8785,7 @@ erts_resume_processes(ErtsProcList *list)
proc = erts_pid2proc(NULL, 0, plp->pid, ERTS_PROC_LOCK_STATUS);
if (proc) {
if (erts_proclist_same(plp, proc)) {
- resume_process(proc);
+ resume_process(proc, ERTS_PROC_LOCK_STATUS);
nresumed++;
}
erts_smp_proc_unlock(proc, ERTS_PROC_LOCK_STATUS);
@@ -9980,8 +10021,10 @@ erts_internal_request_system_task_3(BIF_ALIST_3)
rp_state = n;
}
- erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_STATUS);
-
+ /*
+ * schedule_process_sys_task() unlocks status
+ * lock on process.
+ */
schedule_process_sys_task(rp, rp_state, NULL);
if (free_stqs)
@@ -10726,7 +10769,7 @@ erl_create_process(Process* parent, /* Parent of process (default group leader).
* Schedule process for execution.
*/
- schedule_process(p, state);
+ schedule_process(p, state, 0);
VERBOSE(DEBUG_PROCESSES, ("Created a new process: %T\n",p->common.id));
@@ -11047,7 +11090,8 @@ set_proc_exiting(Process *p,
ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_PENDING_EXIT,
ERTS_PSFLG_EXITING|ERTS_PSFLG_ACTIVE,
&state,
- &enq_prio);
+ &enq_prio,
+ ERTS_PROC_LOCKS_ALL);
p->fvalue = reason;
if (bp)
@@ -11088,7 +11132,8 @@ set_proc_self_exiting(Process *c_p)
ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_PENDING_EXIT,
ERTS_PSFLG_EXITING|ERTS_PSFLG_ACTIVE,
&state,
- &enq_prio);
+ &enq_prio,
+ ERTS_PROC_LOCKS_ALL);
ASSERT(!enqueue);
return state;
@@ -11733,8 +11778,9 @@ resume_suspend_monitor(ErtsSuspendMonitor *smon, void *vc_p)
Process *suspendee = erts_pid2proc((Process *) vc_p, ERTS_PROC_LOCK_MAIN,
smon->pid, ERTS_PROC_LOCK_STATUS);
if (suspendee) {
+ ASSERT(suspendee != vc_p);
if (smon->active)
- resume_process(suspendee);
+ resume_process(suspendee, ERTS_PROC_LOCK_STATUS);
erts_smp_proc_unlock(suspendee, ERTS_PROC_LOCK_STATUS);
}
erts_destroy_suspend_monitor(smon);
@@ -12067,7 +12113,7 @@ timeout_proc(Process* p)
state = erts_smp_atomic32_read_acqb(&p->state);
if (!(state & ERTS_PSFLG_ACTIVE))
- schedule_process(p, state);
+ schedule_process(p, state, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-18 02:55:49 +0000