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-rw-r--r--erts/emulator/beam/erl_process.c97
1 files changed, 97 insertions, 0 deletions
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index adea745471..99a4011b8f 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -967,11 +967,25 @@ typedef struct {
erts_smp_atomic32_t refc;
} ErtsSchedWallTimeReq;
+typedef struct {
+ Process *proc;
+ Eterm ref;
+ Eterm ref_heap[REF_THING_SIZE];
+ Uint req_sched;
+ erts_smp_atomic32_t refc;
+} ErtsSystemCheckReq;
+
+
#if !HALFWORD_HEAP
ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(swtreq,
ErtsSchedWallTimeReq,
5,
ERTS_ALC_T_SCHED_WTIME_REQ)
+
+ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(screq,
+ ErtsSystemCheckReq,
+ 5,
+ ERTS_ALC_T_SYS_CHECK_REQ)
#else
static ERTS_INLINE ErtsSchedWallTimeReq *
swtreq_alloc(void)
@@ -985,6 +999,19 @@ swtreq_free(ErtsSchedWallTimeReq *ptr)
{
erts_free(ERTS_ALC_T_SCHED_WTIME_REQ, ptr);
}
+
+static ERTS_INLINE ErtsSystemCheckReq *
+screq_alloc(void)
+{
+ return erts_alloc(ERTS_ALC_T_SYS_CHECK_REQ,
+ sizeof(ErtsSystemCheckReq));
+}
+
+static ERTS_INLINE void
+screq_free(ErtsSystemCheckReq *ptr)
+{
+ erts_free(ERTS_ALC_T_SYS_CHECK_REQ, ptr);
+}
#endif
static void
@@ -1118,6 +1145,75 @@ erts_sched_wall_time_request(Process *c_p, int set, int enable)
return ref;
}
+static void
+reply_system_check(void *vscrp)
+{
+ ErtsSchedulerData *esdp = erts_get_scheduler_data();
+ ErtsSystemCheckReq *scrp = (ErtsSystemCheckReq *) vscrp;
+ ErtsProcLocks rp_locks = (scrp->req_sched == esdp->no ? ERTS_PROC_LOCK_MAIN : 0);
+ Process *rp = scrp->proc;
+ Eterm msg;
+ Eterm *hp = NULL;
+ Eterm **hpp;
+ Uint sz;
+ ErlOffHeap *ohp = NULL;
+ ErlHeapFragment *bp = NULL;
+
+ ASSERT(esdp);
+#ifdef ERTS_DIRTY_SCHEDULERS
+ ASSERT(!ERTS_SCHEDULER_IS_DIRTY(esdp));
+#endif
+
+ sz = REF_THING_SIZE;
+ hp = erts_alloc_message_heap(sz, &bp, &ohp, rp, &rp_locks);
+ hpp = &hp;
+ msg = STORE_NC(hpp, ohp, scrp->ref);
+
+ erts_queue_message(rp, &rp_locks, bp, msg, NIL);
+
+ if (scrp->req_sched == esdp->no)
+ rp_locks &= ~ERTS_PROC_LOCK_MAIN;
+
+ if (rp_locks)
+ erts_smp_proc_unlock(rp, rp_locks);
+
+ erts_proc_dec_refc(rp);
+
+ if (erts_smp_atomic32_dec_read_nob(&scrp->refc) == 0)
+ screq_free(vscrp);
+}
+
+
+Eterm erts_system_check_request(Process *c_p) {
+ ErtsSchedulerData *esdp = ERTS_PROC_GET_SCHDATA(c_p);
+ Eterm ref;
+ ErtsSystemCheckReq *scrp;
+ Eterm *hp;
+
+ scrp = screq_alloc();
+ ref = erts_make_ref(c_p);
+ hp = &scrp->ref_heap[0];
+
+ scrp->proc = c_p;
+ scrp->ref = STORE_NC(&hp, NULL, ref);
+ scrp->req_sched = esdp->no;
+ erts_smp_atomic32_init_nob(&scrp->refc, (erts_aint32_t) erts_no_schedulers);
+
+ erts_proc_add_refc(c_p, (Sint) erts_no_schedulers);
+
+#ifdef ERTS_SMP
+ if (erts_no_schedulers > 1)
+ erts_schedule_multi_misc_aux_work(1,
+ erts_no_schedulers,
+ reply_system_check,
+ (void *) scrp);
+#endif
+
+ reply_system_check((void *) scrp);
+
+ return ref;
+}
+
static ERTS_INLINE ErtsProcList *
proclist_create(Process *p)
{
@@ -5792,6 +5888,7 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online
init_misc_aux_work();
#if !HALFWORD_HEAP
init_swtreq_alloc();
+ init_screq_alloc();
#endif
erts_atomic32_init_nob(&debug_wait_completed_count, 0); /* debug only */