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-rw-r--r--erts/emulator/beam/atom.names1
-rw-r--r--erts/emulator/beam/beam_bif_load.c133
-rw-r--r--erts/emulator/beam/bif.c39
-rw-r--r--erts/emulator/beam/bif.tab6
-rw-r--r--erts/emulator/beam/break.c10
-rw-r--r--erts/emulator/beam/erl_alloc.types2
-rw-r--r--erts/emulator/beam/erl_message.h5
-rw-r--r--erts/emulator/beam/erl_process.c1224
-rw-r--r--erts/emulator/beam/erl_process.h74
-rwxr-xr-xerts/emulator/beam/global.h4
-rw-r--r--erts/emulator/beam/ops.tab14
-rw-r--r--erts/emulator/beam/utils.c2
-rw-r--r--erts/emulator/hipe/hipe_bif_list.m43
-rw-r--r--erts/emulator/hipe/hipe_native_bif.c17
-rw-r--r--erts/emulator/test/process_SUITE.erl162
15 files changed, 1426 insertions, 270 deletions
diff --git a/erts/emulator/beam/atom.names b/erts/emulator/beam/atom.names
index c2f32ba089..8433fd826a 100644
--- a/erts/emulator/beam/atom.names
+++ b/erts/emulator/beam/atom.names
@@ -78,6 +78,7 @@ atom allocated_areas
atom allocator
atom allocator_sizes
atom alloc_util_allocators
+atom allow_gc
atom allow_passive_connect
atom already_loaded
atom amd64
diff --git a/erts/emulator/beam/beam_bif_load.c b/erts/emulator/beam/beam_bif_load.c
index 649594a334..5239940a50 100644
--- a/erts/emulator/beam/beam_bif_load.c
+++ b/erts/emulator/beam/beam_bif_load.c
@@ -36,7 +36,7 @@
#include "erl_thr_progress.h"
static void set_default_trace_pattern(Eterm module);
-static Eterm check_process_code(Process* rp, Module* modp);
+static Eterm check_process_code(Process* rp, Module* modp, int allow_gc, int *redsp);
static void delete_code(Module* modp);
static void decrement_refc(BeamInstr* code);
static int is_native(BeamInstr* code);
@@ -427,69 +427,80 @@ check_old_code_1(BIF_ALIST_1)
}
Eterm
-check_process_code_2(BIF_ALIST_2)
+erts_check_process_code(Process *c_p, Eterm module, int allow_gc, int *redsp)
{
- Process* rp;
Module* modp;
+ Eterm res;
+ ErtsCodeIndex code_ix;
- if (is_not_atom(BIF_ARG_2)) {
- goto error;
- }
- if (is_internal_pid(BIF_ARG_1)) {
- Eterm res;
- ErtsCodeIndex code_ix;
-
- code_ix = erts_active_code_ix();
- modp = erts_get_module(BIF_ARG_2, code_ix);
- if (modp == NULL) { /* Doesn't exist. */
- return am_false;
- }
- erts_rlock_old_code(code_ix);
- if (modp->old.code == NULL) { /* No old code. */
- erts_runlock_old_code(code_ix);
- return am_false;
- }
- erts_runlock_old_code(code_ix);
-
-#ifdef ERTS_SMP
- rp = erts_pid2proc_suspend(BIF_P, ERTS_PROC_LOCK_MAIN,
- BIF_ARG_1, ERTS_PROC_LOCK_MAIN);
-#else
- rp = erts_pid2proc(BIF_P, 0, BIF_ARG_1, 0);
-#endif
- if (!rp) {
- BIF_RET(am_false);
- }
- if (rp == ERTS_PROC_LOCK_BUSY) {
- ERTS_BIF_YIELD2(bif_export[BIF_check_process_code_2], BIF_P,
- BIF_ARG_1, BIF_ARG_2);
- }
- erts_rlock_old_code(code_ix);
- if (modp->old.code != NULL) { /* must check again */
- res = check_process_code(rp, modp);
- }
- else {
- res = am_false;
- }
- erts_runlock_old_code(code_ix);
-#ifdef ERTS_SMP
- if (BIF_P != rp) {
- erts_resume(rp, ERTS_PROC_LOCK_MAIN);
- erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_MAIN);
+ (*redsp)++;
+
+ ASSERT(is_atom(module));
+
+ code_ix = erts_active_code_ix();
+ modp = erts_get_module(module, code_ix);
+ if (!modp)
+ return am_false;
+ erts_rlock_old_code(code_ix);
+ res = modp->old.code ? check_process_code(c_p, modp, allow_gc, redsp) : am_false;
+ erts_runlock_old_code(code_ix);
+
+ return res;
+}
+
+BIF_RETTYPE erts_internal_check_process_code_2(BIF_ALIST_2)
+{
+ int reds = 0;
+ Eterm res;
+ Eterm olist = BIF_ARG_2;
+ int allow_gc = 1;
+
+ if (is_not_atom(BIF_ARG_1))
+ goto badarg;
+
+ while (is_list(olist)) {
+ Eterm *lp = list_val(olist);
+ Eterm opt = CAR(lp);
+ if (is_tuple(opt)) {
+ Eterm* tp = tuple_val(opt);
+ switch (arityval(tp[0])) {
+ case 2:
+ switch (tp[1]) {
+ case am_allow_gc:
+ switch (tp[2]) {
+ case am_false:
+ allow_gc = 0;
+ break;
+ case am_true:
+ allow_gc = 1;
+ break;
+ default:
+ goto badarg;
+ }
+ break;
+ default:
+ goto badarg;
+ }
+ break;
+ default:
+ goto badarg;
+ }
}
-#endif
- BIF_RET(res);
- }
- else if (is_external_pid(BIF_ARG_1)
- && external_pid_dist_entry(BIF_ARG_1) == erts_this_dist_entry) {
- BIF_RET(am_false);
+ else
+ goto badarg;
+ olist = CDR(lp);
}
+ if (is_not_nil(olist))
+ goto badarg;
- error:
+ res = erts_check_process_code(BIF_P, BIF_ARG_1, allow_gc, &reds);
+
+ BIF_RET2(res, reds);
+
+badarg:
BIF_ERROR(BIF_P, BADARG);
}
-
BIF_RETTYPE delete_module_1(BIF_ALIST_1)
{
ErtsCodeIndex code_ix;
@@ -710,7 +721,7 @@ set_default_trace_pattern(Eterm module)
}
static Eterm
-check_process_code(Process* rp, Module* modp)
+check_process_code(Process* rp, Module* modp, int allow_gc, int *redsp)
{
BeamInstr* start;
char* mod_start;
@@ -786,6 +797,8 @@ check_process_code(Process* rp, Module* modp)
if (done_gc) {
return am_true;
} else {
+ if (!allow_gc)
+ return am_aborted;
/*
* Try to get rid of this fun by garbage collecting.
* Clear both fvalue and ftrace to make sure they
@@ -796,7 +809,7 @@ check_process_code(Process* rp, Module* modp)
rp->ftrace = NIL;
done_gc = 1;
FLAGS(rp) |= F_NEED_FULLSWEEP;
- (void) erts_garbage_collect(rp, 0, rp->arg_reg, rp->arity);
+ *redsp += erts_garbage_collect(rp, 0, rp->arg_reg, rp->arity);
goto rescan;
}
}
@@ -850,6 +863,9 @@ check_process_code(Process* rp, Module* modp)
Uint lit_size;
struct erl_off_heap_header* oh;
+ if (!allow_gc)
+ return am_aborted;
+
/*
* Try to get rid of constants by by garbage collecting.
* Clear both fvalue and ftrace.
@@ -859,11 +875,12 @@ check_process_code(Process* rp, Module* modp)
rp->ftrace = NIL;
done_gc = 1;
FLAGS(rp) |= F_NEED_FULLSWEEP;
- (void) erts_garbage_collect(rp, 0, rp->arg_reg, rp->arity);
+ *redsp += erts_garbage_collect(rp, 0, rp->arg_reg, rp->arity);
literals = (Eterm *) modp->old.code[MI_LITERALS_START];
lit_size = (Eterm *) modp->old.code[MI_LITERALS_END] - literals;
oh = (struct erl_off_heap_header *)
modp->old.code[MI_LITERALS_OFF_HEAP];
+ *redsp += lit_size / 10; /* Need, better value... */
erts_garbage_collect_literals(rp, literals, lit_size, oh);
}
}
diff --git a/erts/emulator/beam/bif.c b/erts/emulator/beam/bif.c
index 755c5e6882..58bd6aac0b 100644
--- a/erts/emulator/beam/bif.c
+++ b/erts/emulator/beam/bif.c
@@ -3741,45 +3741,6 @@ BIF_RETTYPE now_0(BIF_ALIST_0)
/**********************************************************************/
-BIF_RETTYPE garbage_collect_1(BIF_ALIST_1)
-{
- int reds;
- Process *rp;
-
- if (is_not_pid(BIF_ARG_1)) {
- BIF_ERROR(BIF_P, BADARG);
- }
-
- if (BIF_P->common.id == BIF_ARG_1)
- rp = BIF_P;
- else {
-#ifdef ERTS_SMP
- rp = erts_pid2proc_suspend(BIF_P, ERTS_PROC_LOCK_MAIN,
- BIF_ARG_1, ERTS_PROC_LOCK_MAIN);
- if (rp == ERTS_PROC_LOCK_BUSY)
- ERTS_BIF_YIELD1(bif_export[BIF_garbage_collect_1], BIF_P, BIF_ARG_1);
-#else
- rp = erts_proc_lookup(BIF_ARG_1);
-#endif
- if (!rp)
- BIF_RET(am_false);
- }
-
- /* The GC cost is taken for the process executing this BIF. */
-
- FLAGS(rp) |= F_NEED_FULLSWEEP;
- reds = erts_garbage_collect(rp, 0, rp->arg_reg, rp->arity);
-
-#ifdef ERTS_SMP
- if (BIF_P != rp) {
- erts_resume(rp, ERTS_PROC_LOCK_MAIN);
- erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_MAIN);
- }
-#endif
-
- BIF_RET2(am_true, reds);
-}
-
BIF_RETTYPE garbage_collect_0(BIF_ALIST_0)
{
int reds;
diff --git a/erts/emulator/beam/bif.tab b/erts/emulator/beam/bif.tab
index dc8e9101de..3b7bb56885 100644
--- a/erts/emulator/beam/bif.tab
+++ b/erts/emulator/beam/bif.tab
@@ -46,7 +46,6 @@ bif erlang:atom_to_list/1
bif erlang:binary_to_list/1
bif erlang:binary_to_list/3
bif erlang:binary_to_term/1
-bif erlang:check_process_code/2
bif erlang:crc32/1
bif erlang:crc32/2
bif erlang:crc32_combine/3
@@ -67,7 +66,6 @@ bif erlang:float_to_list/1
bif erlang:float_to_list/2
bif erlang:fun_info/2
bif erlang:garbage_collect/0
-bif erlang:garbage_collect/1
bif erlang:get/0
bif erlang:get/1
bif erlang:get_keys/1
@@ -155,6 +153,10 @@ bif erts_internal:port_control/3
bif erts_internal:port_close/1
bif erts_internal:port_connect/2
+bif erts_internal:request_system_task/3
+bif erts_internal:check_process_code/2
+
+
# inet_db support
bif erlang:port_set_data/2
bif erlang:port_get_data/1
diff --git a/erts/emulator/beam/break.c b/erts/emulator/beam/break.c
index ad9a89b642..acbd700cc4 100644
--- a/erts/emulator/beam/break.c
+++ b/erts/emulator/beam/break.c
@@ -109,10 +109,12 @@ process_killer(void)
erts_smp_proc_lock(rp, rp_locks);
state = erts_smp_atomic32_read_acqb(&rp->state);
if (state & (ERTS_PSFLG_FREE
- | ERTS_PSFLG_EXITING
- | ERTS_PSFLG_ACTIVE
- | ERTS_PSFLG_IN_RUNQ
- | ERTS_PSFLG_RUNNING)) {
+ | ERTS_PSFLG_EXITING
+ | ERTS_PSFLG_ACTIVE
+ | ERTS_PSFLG_ACTIVE_SYS
+ | ERTS_PSFLG_IN_RUNQ
+ | ERTS_PSFLG_RUNNING
+ | ERTS_PSFLG_RUNNING_SYS)) {
erts_printf("Can only kill WAITING processes this way\n");
}
else {
diff --git a/erts/emulator/beam/erl_alloc.types b/erts/emulator/beam/erl_alloc.types
index bb5eba80be..32308fae9b 100644
--- a/erts/emulator/beam/erl_alloc.types
+++ b/erts/emulator/beam/erl_alloc.types
@@ -268,6 +268,8 @@ type PROC_INTERVAL LONG_LIVED SYSTEM process_interval
type BUSY_CALLER_TAB SHORT_LIVED SYSTEM busy_caller_table
type BUSY_CALLER SHORT_LIVED SYSTEM busy_caller
type PORT_DATA_HEAP STANDARD SYSTEM port_data_heap
+type PROC_SYS_TSK SHORT_LIVED PROCESSES proc_sys_task
+type PROC_SYS_TSK_QS SHORT_LIVED PROCESSES proc_sys_task_queues
+if threads_no_smp
# Need thread safe allocs, but std_alloc and fix_alloc are not;
diff --git a/erts/emulator/beam/erl_message.h b/erts/emulator/beam/erl_message.h
index 771eba431f..0f3bb8d281 100644
--- a/erts/emulator/beam/erl_message.h
+++ b/erts/emulator/beam/erl_message.h
@@ -46,6 +46,11 @@ typedef struct erl_off_heap {
Uint64 overhead; /* Administrative overhead (used to force GC). */
} ErlOffHeap;
+#define ERTS_INIT_OFF_HEAP(OHP) \
+ do { \
+ (OHP)->first = NULL; \
+ (OHP)->overhead = 0; \
+ } while (0)
#include "external.h"
#include "erl_process.h"
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index 434d5ca147..ad806da660 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -283,6 +283,40 @@ struct erts_system_profile_flags_t erts_system_profile_flags;
#error "Need to store process_count in another type"
#endif
+typedef enum {
+ ERTS_PSTT_GC, /* Garbage Collect */
+ ERTS_PSTT_CPC /* Check Process Code */
+} ErtsProcSysTaskType;
+
+#define ERTS_MAX_PROC_SYS_TASK_ARGS 2
+
+struct ErtsProcSysTask_ {
+ ErtsProcSysTask *next;
+ ErtsProcSysTask *prev;
+ ErtsProcSysTaskType type;
+ Eterm requester;
+ Eterm reply_tag;
+ Eterm req_id;
+ Uint req_id_sz;
+ Eterm arg[ERTS_MAX_PROC_SYS_TASK_ARGS];
+ ErlOffHeap off_heap;
+ Eterm heap[1];
+};
+
+#define ERTS_PROC_SYS_TASK_SIZE(HSz) \
+ (sizeof(ErtsProcSysTask) - sizeof(Eterm) + sizeof(Eterm)*(HSz))
+
+struct ErtsProcSysTaskQs_ {
+ int qmask;
+ int ncount;
+ ErtsProcSysTask *q[ERTS_NO_PROC_PRIO_LEVELS];
+};
+
+ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(proc_sys_task_queues,
+ ErtsProcSysTaskQs,
+ 50,
+ ERTS_ALC_T_PROC_SYS_TSK_QS)
+
ERTS_SCHED_PREF_QUICK_ALLOC_IMPL(misc_op_list,
ErtsMiscOpList,
10,
@@ -353,6 +387,14 @@ static void aux_work_timeout_early_init(int no_schedulers);
static void aux_work_timeout_late_init(void);
static void setup_aux_work_timer(void);
+static int execute_sys_tasks(Process *c_p,
+ erts_aint32_t *statep,
+ int in_reds);
+static int cleanup_sys_tasks(Process *c_p,
+ erts_aint32_t in_state,
+ int in_reds);
+
+
#if defined(DEBUG) || 0
#define ERTS_DBG_CHK_AUX_WORK_VAL(V) dbg_chk_aux_work_val((V))
static void
@@ -2848,7 +2890,7 @@ dequeue_process(ErtsRunQueue *runq, int prio_q, erts_aint32_t *statep)
if (statep)
*statep = state;
- prio = (int) (ERTS_PSFLG_PRIO_MASK & state);
+ prio = (int) ERTS_PSFLGS_GET_PRQ_PRIO(state);
rqi = &runq->procs.prio_info[prio];
@@ -2997,7 +3039,7 @@ immigrate(ErtsRunQueue *c_rq, ErtsMigrationPath *mp)
erts_aint32_t state;
state = erts_smp_atomic32_read_acqb(&proc->state);
if (!(ERTS_PSFLG_BOUND & state)
- && (prio == (int) (ERTS_PSFLG_PRIO_MASK & state))) {
+ && (prio == (int) ERTS_PSFLGS_GET_PRQ_PRIO(state))) {
ErtsRunQueueInfo *rqi = &rq->procs.prio_info[prio];
unqueue_process(rq, rpq, rqi, prio, prev_proc, proc);
erts_smp_runq_unlock(rq);
@@ -3079,7 +3121,7 @@ schedule_bound_processes(ErtsRunQueue *rq,
while (proc) {
erts_aint32_t state = erts_smp_atomic32_read_acqb(&proc->state);
next = proc->next;
- enqueue_process(rq, (int) (ERTS_PSFLG_PRIO_MASK & state), proc);
+ enqueue_process(rq, (int) ERTS_PSFLGS_GET_PRQ_PRIO(state), proc);
proc = next;
}
}
@@ -3184,7 +3226,7 @@ evacuate_run_queue(ErtsRunQueue *rq,
sbpp->last = proc;
}
else {
- int prio = (int) (ERTS_PSFLG_PRIO_MASK & state);
+ int prio = (int) ERTS_PSFLGS_GET_PRQ_PRIO(state);
erts_smp_runq_unlock(rq);
to_rq = mp->prio[prio].runq;
@@ -3257,7 +3299,7 @@ try_steal_task_from_victim(ErtsRunQueue *rq, int *rq_lockedp, ErtsRunQueue *vrq,
erts_aint32_t state = erts_smp_atomic32_read_acqb(&proc->state);
if (!(ERTS_PSFLG_BOUND & state)) {
/* Steal process */
- int prio = (int) (ERTS_PSFLG_PRIO_MASK & state);
+ int prio = (int) ERTS_PSFLGS_GET_PRQ_PRIO(state);
ErtsRunQueueInfo *rqi = &vrq->procs.prio_info[prio];
unqueue_process(vrq, rpq, rqi, prio, prev_proc, proc);
erts_smp_runq_unlock(vrq);
@@ -4575,6 +4617,7 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online)
#endif
init_misc_op_list_alloc();
+ init_proc_sys_task_queues_alloc();
#ifdef ERTS_SMP
set_wakeup_other_data();
@@ -4858,46 +4901,166 @@ erts_get_scheduler_data(void)
#endif
+static Process *
+make_proxy_proc(Process *prev_proxy, Process *proc, erts_aint32_t prio)
+{
+ erts_aint32_t state;
+ Process *proxy;
+#ifdef ERTS_SMP
+ ErtsRunQueue *rq = RUNQ_READ_RQ(&proc->run_queue);
+#endif
+
+ state = (ERTS_PSFLG_PROXY
+ | ERTS_PSFLG_IN_RUNQ
+ | (((erts_aint32_t) 1) << (prio + ERTS_PSFLGS_IN_PRQ_MASK_OFFSET))
+ | (prio << ERTS_PSFLGS_PRQ_PRIO_OFFSET)
+ | (prio << ERTS_PSFLGS_USR_PRIO_OFFSET)
+ | (prio << ERTS_PSFLGS_ACT_PRIO_OFFSET));
+
+ if (prev_proxy) {
+ proxy = prev_proxy;
+ ASSERT(erts_smp_atomic32_read_nob(&proxy->state) & ERTS_PSFLG_PROXY);
+ erts_smp_atomic32_set_nob(&proxy->state, state);
+#ifdef ERTS_SMP
+ RUNQ_SET_RQ(&proc->run_queue, rq);
+#endif
+ }
+ else {
+ proxy = erts_alloc(ERTS_ALC_T_PROC, sizeof(Process));
+#ifdef DEBUG
+ {
+ int i;
+ Uint32 *ui32 = (Uint32 *) (char *) proxy;
+ for (i = 0; i < sizeof(Process)/sizeof(Uint32); i++)
+ ui32[i] = (Uint32) 0xdeadbeef;
+ }
+#endif
+ erts_smp_atomic32_init_nob(&proxy->state, state);
+#ifdef ERTS_SMP
+ erts_smp_atomic_init_nob(&proxy->run_queue,
+ erts_smp_atomic_read_nob(&proc->run_queue));
+#endif
+ }
+
+ proxy->common.id = proc->common.id;
+
+ return proxy;
+}
+
+static ERTS_INLINE void
+free_proxy_proc(Process *proxy)
+{
+ ASSERT(erts_smp_atomic32_read_nob(&proxy->state) & ERTS_PSFLG_PROXY);
+ erts_free(ERTS_ALC_T_PROC, proxy);
+}
+
+
+static ERTS_INLINE int
+check_enqueue_in_prio_queue(erts_aint32_t *prq_prio_p,
+ erts_aint32_t *newp,
+ erts_aint32_t actual)
+{
+ erts_aint32_t aprio, qbit, max_qbit;
+
+ aprio = (actual >> ERTS_PSFLGS_ACT_PRIO_OFFSET) & ERTS_PSFLGS_PRIO_MASK;
+ qbit = 1 << aprio;
+
+ *prq_prio_p = aprio;
+
+ max_qbit = (actual >> ERTS_PSFLGS_IN_PRQ_MASK_OFFSET) & ERTS_PSFLGS_QMASK;
+ max_qbit |= 1 << ERTS_PSFLGS_QMASK_BITS;
+ max_qbit &= -max_qbit;
+ /*
+ * max_qbit now either contain bit set for highest prio queue or a bit
+ * out of range (which will have a value larger than valid range).
+ */
+
+ if (qbit >= max_qbit)
+ return 0; /* Already queued in higher or equal prio */
+
+ /* Need to enqueue (if already enqueued, it is in lower prio) */
+ *newp |= qbit << ERTS_PSFLGS_IN_PRQ_MASK_OFFSET;
+
+ if ((actual & (ERTS_PSFLG_IN_RUNQ|ERTS_PSFLGS_USR_PRIO_MASK))
+ != (aprio << ERTS_PSFLGS_USR_PRIO_OFFSET)) {
+ /*
+ * Process struct already enqueued, or actual prio not
+ * equal to user prio, i.e., enqueue using proxy.
+ */
+ return -1;
+ }
+
+ /*
+ * Enqueue using process struct.
+ */
+ *newp &= ~ERTS_PSFLGS_PRQ_PRIO_MASK;
+ *newp |= ERTS_PSFLG_IN_RUNQ | (aprio << ERTS_PSFLGS_PRQ_PRIO_OFFSET);
+ return 1;
+}
+
/*
* scheduler_out_process() return with c_rq locked.
*/
static ERTS_INLINE int
-schedule_out_process(ErtsRunQueue *c_rq, erts_aint32_t state, Process *p)
+schedule_out_process(ErtsRunQueue *c_rq, erts_aint32_t state, Process *p, Process *proxy)
{
- erts_aint32_t a, e, n;
+ erts_aint32_t a, e, n, enq_prio = -1;
int res = 0;
+ int enqueue; /* < 0 -> use proxy */
a = state;
while (1) {
n = e = a;
- ASSERT(a & ERTS_PSFLG_RUNNING);
- ASSERT(!(a & ERTS_PSFLG_IN_RUNQ));
+ ASSERT(a & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_RUNNING_SYS));
- n &= ~ERTS_PSFLG_RUNNING;
- if ((a & (ERTS_PSFLG_ACTIVE|ERTS_PSFLG_SUSPENDED)) == ERTS_PSFLG_ACTIVE)
- n |= ERTS_PSFLG_IN_RUNQ;
+ enqueue = 0;
+
+ n &= ~(ERTS_PSFLG_RUNNING|ERTS_PSFLG_RUNNING_SYS);
+ if (a & ERTS_PSFLG_ACTIVE_SYS
+ || (a & (ERTS_PSFLG_ACTIVE|ERTS_PSFLG_SUSPENDED)) == ERTS_PSFLG_ACTIVE) {
+ enqueue = check_enqueue_in_prio_queue(&enq_prio, &n, a);
+ }
a = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e);
if (a == e)
break;
}
- if (!(n & ERTS_PSFLG_IN_RUNQ)) {
- if (erts_system_profile_flags.runnable_procs)
- profile_runnable_proc(p, am_inactive);
+ if (!enqueue) {
+
+ if (erts_system_profile_flags.runnable_procs) {
+
+ if (!(a & ERTS_PSFLG_ACTIVE_SYS)
+ && (!(a & ERTS_PSFLG_ACTIVE)
+ || (a & ERTS_PSFLG_SUSPENDED))) {
+ /* Process inactive */
+ profile_runnable_proc(p, am_inactive);
+ }
+ }
+
+ if (proxy)
+ free_proxy_proc(proxy);
}
else {
- int prio = (int) (ERTS_PSFLG_PRIO_MASK & n);
+ Process *sched_p;
ErtsRunQueue *runq = erts_get_runq_proc(p);
- ASSERT(!(n & ERTS_PSFLG_SUSPENDED));
+ ASSERT(!(n & ERTS_PSFLG_SUSPENDED) || (n & ERTS_PSFLG_ACTIVE_SYS));
+
+ if (enqueue < 0)
+ sched_p = make_proxy_proc(proxy, p, enq_prio);
+ else {
+ sched_p = p;
+ if (proxy)
+ free_proxy_proc(proxy);
+ }
#ifdef ERTS_SMP
if (!(ERTS_PSFLG_BOUND & n)) {
- ErtsRunQueue *new_runq = erts_check_emigration_need(runq, prio);
+ ErtsRunQueue *new_runq = erts_check_emigration_need(runq, enq_prio);
if (new_runq) {
- RUNQ_SET_RQ(&p->run_queue, new_runq);
+ RUNQ_SET_RQ(&sched_p->run_queue, new_runq);
runq = new_runq;
}
}
@@ -4908,7 +5071,7 @@ schedule_out_process(ErtsRunQueue *c_rq, erts_aint32_t state, Process *p)
erts_smp_runq_lock(runq);
/* Enqueue the process */
- enqueue_process(runq, prio, p);
+ enqueue_process(runq, (int) enq_prio, sched_p);
if (runq == c_rq)
return res;
@@ -4920,14 +5083,13 @@ schedule_out_process(ErtsRunQueue *c_rq, erts_aint32_t state, Process *p)
}
static ERTS_INLINE void
-add2runq(Process *p, erts_aint32_t state)
+add2runq(Process *p, erts_aint32_t state, erts_aint32_t prio)
{
- int prio = (int) (ERTS_PSFLG_PRIO_MASK & state);
ErtsRunQueue *runq = erts_get_runq_proc(p);
#ifdef ERTS_SMP
if (!(ERTS_PSFLG_BOUND & state)) {
- ErtsRunQueue *new_runq = erts_check_emigration_need(runq, prio);
+ ErtsRunQueue *new_runq = erts_check_emigration_need(runq, (int) prio);
if (new_runq) {
RUNQ_SET_RQ(&p->run_queue, new_runq);
runq = new_runq;
@@ -4939,101 +5101,236 @@ add2runq(Process *p, erts_aint32_t state)
erts_smp_runq_lock(runq);
/* Enqueue the process */
- enqueue_process(runq, prio, p);
+ enqueue_process(runq, (int) prio, p);
erts_smp_runq_unlock(runq);
smp_notify_inc_runq(runq);
}
-static ERTS_INLINE void
-schedule_process(Process *p, erts_aint32_t state, int active_enq)
+static ERTS_INLINE int
+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 a = state, n;
+ /*
+ * NOTE: ERTS_PSFLG_RUNNING, ERTS_PSFLG_RUNNING_SYS and
+ * ERTS_PSFLG_ACTIVE_SYS are not allowed to be
+ * altered by this function!
+ */
+ erts_aint32_t a = *statep, n;
+ int enqueue; /* < 0 -> use proxy */
+
+ ASSERT(!(a & ERTS_PSFLG_PROXY));
+ ASSERT((clear_state_flags & (ERTS_PSFLG_RUNNING
+ | ERTS_PSFLG_RUNNING_SYS
+ | ERTS_PSFLG_ACTIVE_SYS)) == 0);
+ ASSERT((set_state_flags & (ERTS_PSFLG_RUNNING
+ | ERTS_PSFLG_RUNNING_SYS
+ | ERTS_PSFLG_ACTIVE_SYS)) == 0);
while (1) {
erts_aint32_t e;
n = e = a;
+ enqueue = 0;
+
if (a & ERTS_PSFLG_FREE)
- return; /* We don't want to schedule free processes... */
- n |= ERTS_PSFLG_ACTIVE;
- if (!(a & (ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_RUNNING)))
- n |= ERTS_PSFLG_IN_RUNQ;
+ break; /* We don't want to schedule free processes... */
+
+ if (clear_state_flags)
+ n &= ~clear_state_flags;
+
+ if (set_state_flags)
+ n |= set_state_flags;
+
+ if ((n & (ERTS_PSFLG_SUSPENDED
+ | ERTS_PSFLG_RUNNING
+ | ERTS_PSFLG_RUNNING_SYS
+ | ERTS_PSFLG_IN_RUNQ
+ | ERTS_PSFLG_ACTIVE)) == ERTS_PSFLG_ACTIVE) {
+ /*
+ * Active and seemingly need to be enqueued, but
+ * process may be in a run queue via proxy, need
+ * further inspection...
+ */
+ enqueue = check_enqueue_in_prio_queue(enq_prio_p, &n, a);
+ }
+
a = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e);
if (a == e)
break;
- if (!active_enq && (a & ERTS_PSFLG_ACTIVE))
- return; /* Someone else activated process ... */
+ if (enqueue == 0 && n == a)
+ break;
}
- if (erts_system_profile_flags.runnable_procs
- && !(a & (ERTS_PSFLG_ACTIVE|ERTS_PSFLG_SUSPENDED))) {
- profile_runnable_proc(p, am_active);
+ if (erts_system_profile_flags.runnable_procs) {
+
+ if (((n & (ERTS_PSFLG_SUSPENDED
+ | ERTS_PSFLG_ACTIVE)) == ERTS_PSFLG_ACTIVE)
+ && (!(a & (ERTS_PSFLG_ACTIVE_SYS
+ | ERTS_PSFLG_RUNNING
+ | ERTS_PSFLG_RUNNING_SYS)
+ && (!(a & ERTS_PSFLG_ACTIVE)
+ || (a & ERTS_PSFLG_SUSPENDED))))) {
+ /* We activated a prevously inactive process */
+ profile_runnable_proc(p, am_active);
+ }
+
}
- if ((n & ERTS_PSFLG_IN_RUNQ) && !(a & ERTS_PSFLG_IN_RUNQ))
- add2runq(p, n);
+ *statep = a;
+
+ return enqueue;
+}
+
+static ERTS_INLINE void
+schedule_process(Process *p, erts_aint32_t in_state)
+{
+ erts_aint32_t enq_prio = -1;
+ erts_aint32_t state = in_state;
+ int enqueue = change_proc_schedule_state(p,
+ 0,
+ ERTS_PSFLG_ACTIVE,
+ &state,
+ &enq_prio);
+ if (enqueue)
+ add2runq(enqueue > 0 ? p : make_proxy_proc(NULL, p, enq_prio),
+ state,
+ enq_prio);
}
void
erts_schedule_process(Process *p, erts_aint32_t state)
{
- schedule_process(p, state, 0);
+ schedule_process(p, state);
+}
+
+static void
+schedule_process_sys_task(Process *p, erts_aint32_t state, Process *proxy)
+{
+ erts_aint32_t a = state, n, enq_prio = -1;
+ int enqueue; /* < 0 -> use proxy */
+
+ ASSERT(!(state & ERTS_PSFLG_PROXY));
+
+ while (1) {
+ erts_aint32_t e;
+ n = e = a;
+
+ if (a & ERTS_PSFLG_FREE)
+ return; /* We don't want to schedule free processes... */
+
+ enqueue = 0;
+ n |= ERTS_PSFLG_ACTIVE_SYS;
+ if (!(a & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_RUNNING_SYS)))
+ enqueue = check_enqueue_in_prio_queue(&enq_prio, &n, a);
+ a = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e);
+ if (a == e)
+ break;
+ if (a == n && !enqueue)
+ goto cleanup;
+ }
+
+ if (erts_system_profile_flags.runnable_procs) {
+
+ if (!(a & (ERTS_PSFLG_ACTIVE_SYS
+ | ERTS_PSFLG_RUNNING
+ | ERTS_PSFLG_RUNNING_SYS))
+ && (!(a & ERTS_PSFLG_ACTIVE) || (a & ERTS_PSFLG_SUSPENDED))) {
+ /* We activated a prevously inactive process */
+ profile_runnable_proc(p, am_active);
+ }
+
+ }
+
+ if (enqueue) {
+ Process *sched_p;
+ if (enqueue > 0)
+ sched_p = p;
+ else {
+ sched_p = make_proxy_proc(proxy, p, enq_prio);
+ proxy = NULL;
+ }
+ add2runq(sched_p, n, enq_prio);
+ }
+
+cleanup:
+ if (proxy)
+ free_proxy_proc(proxy);
}
static ERTS_INLINE int
suspend_process(Process *c_p, Process *p)
{
- erts_aint32_t state = erts_smp_atomic32_read_acqb(&p->state);
+ erts_aint32_t state;
int suspended = 0;
ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p));
+ state = erts_smp_atomic32_read_acqb(&p->state);
+
if ((state & ERTS_PSFLG_SUSPENDED))
suspended = -1;
else {
if (c_p == p) {
state = erts_smp_atomic32_read_bor_relb(&p->state,
ERTS_PSFLG_SUSPENDED);
- state |= ERTS_PSFLG_SUSPENDED;
ASSERT(state & ERTS_PSFLG_RUNNING);
- suspended = 1;
+ suspended = (state & ERTS_PSFLG_SUSPENDED) ? -1: 1;
}
else {
while (!(state & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_EXITING))) {
- erts_aint32_t e, n;
+ erts_aint32_t n, e;
+
n = e = state;
n |= ERTS_PSFLG_SUSPENDED;
state = erts_smp_atomic32_cmpxchg_relb(&p->state, n, e);
if (state == e) {
- state = n;
suspended = 1;
break;
}
+ if (state & ERTS_PSFLG_SUSPENDED) {
+ suspended = -1;
+ break;
+ }
}
}
}
- if (state & ERTS_PSFLG_SUSPENDED) {
+ if (suspended) {
ASSERT(!(ERTS_PSFLG_RUNNING & state)
|| p == erts_get_current_process());
- if (erts_system_profile_flags.runnable_procs
- && (p->rcount == 0)
- && (state & ERTS_PSFLG_ACTIVE)) {
- profile_runnable_proc(p, am_inactive);
+ if (suspended > 0 && erts_system_profile_flags.runnable_procs) {
+
+ /* 'state' is before our change... */
+
+ if ((state & (ERTS_PSFLG_ACTIVE
+ | ERTS_PSFLG_ACTIVE_SYS
+ | ERTS_PSFLG_RUNNING
+ | ERTS_PSFLG_RUNNING_SYS
+ | ERTS_PSFLG_SUSPENDED)) == ERTS_PSFLG_ACTIVE) {
+ /* We made process inactive */
+ profile_runnable_proc(p, am_inactive);
+ }
+
}
p->rcount++; /* count number of suspend */
}
+
return suspended;
}
static ERTS_INLINE void
resume_process(Process *p)
{
- erts_aint32_t state;
+ erts_aint32_t state, enq_prio = -1;
+ int enqueue;
+
ERTS_SMP_LC_ASSERT(ERTS_PROC_LOCK_STATUS & erts_proc_lc_my_proc_locks(p));
ASSERT(p->rcount > 0);
@@ -5041,14 +5338,16 @@ resume_process(Process *p)
if (--p->rcount > 0) /* multiple suspend */
return;
- state = erts_smp_atomic32_read_band_mb(&p->state, ~ERTS_PSFLG_SUSPENDED);
- state &= ~ERTS_PSFLG_SUSPENDED;
- if ((state & (ERTS_PSFLG_EXITING
- | ERTS_PSFLG_ACTIVE
- | ERTS_PSFLG_IN_RUNQ
- | ERTS_PSFLG_RUNNING)) == ERTS_PSFLG_ACTIVE) {
- schedule_process(p, state, 1);
- }
+ state = erts_smp_atomic32_read_nob(&p->state);
+ enqueue = change_proc_schedule_state(p,
+ ERTS_PSFLG_SUSPENDED,
+ 0,
+ &state,
+ &enq_prio);
+ if (enqueue)
+ add2runq(enqueue > 0 ? p : make_proxy_proc(NULL, p, enq_prio),
+ state,
+ enq_prio);
}
int
@@ -6032,7 +6331,8 @@ pid2proc_not_running(Process *c_p, ErtsProcLocks c_p_locks,
goto done;
}
else {
- if (!(ERTS_PSFLG_RUNNING & erts_smp_atomic32_read_acqb(&rp->state)))
+ if (!((ERTS_PSFLG_RUNNING|ERTS_PSFLG_RUNNING_SYS)
+ & erts_smp_atomic32_read_acqb(&rp->state)))
goto done;
}
@@ -6695,7 +6995,7 @@ Eterm
erts_get_process_priority(Process *p)
{
erts_aint32_t state = erts_smp_atomic32_read_nob(&p->state);
- switch (state & ERTS_PSFLG_PRIO_MASK) {
+ switch (ERTS_PSFLGS_GET_USR_PRIO(state)) {
case PRIORITY_MAX: return am_max;
case PRIORITY_HIGH: return am_high;
case PRIORITY_NORMAL: return am_normal;
@@ -6718,18 +7018,60 @@ erts_set_process_priority(Process *p, Eterm value)
}
a = erts_smp_atomic32_read_nob(&p->state);
- if (nprio == (a & ERTS_PSFLG_PRIO_MASK))
+ if (nprio == ERTS_PSFLGS_GET_USR_PRIO(a))
oprio = nprio;
else {
- erts_aint32_t e, n;
+ int slocked = 0;
+ erts_aint32_t e, n, aprio;
+
+ if (a & ERTS_PSFLG_ACTIVE_SYS) {
+ erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS);
+ slocked = 1;
+ }
+
do {
- oprio = a & ERTS_PSFLG_PRIO_MASK;
+ oprio = ERTS_PSFLGS_GET_USR_PRIO(a);
n = e = a;
- ASSERT(!(a & ERTS_PSFLG_IN_RUNQ));
+ if (!(a & ERTS_PSFLG_ACTIVE_SYS))
+ aprio = nprio;
+ else {
+ int max_qbit;
+
+ if (!slocked) {
+ erts_smp_proc_lock(p, ERTS_PROC_LOCK_STATUS);
+ slocked = 1;
+ }
+
+ max_qbit = p->sys_task_qs->qmask;
+ max_qbit &= -max_qbit;
+ switch (max_qbit) {
+ case MAX_BIT:
+ aprio = PRIORITY_MAX;
+ break;
+ case HIGH_BIT:
+ aprio = PRIORITY_HIGH;
+ break;
+ case NORMAL_BIT:
+ aprio = PRIORITY_NORMAL;
+ break;
+ case LOW_BIT:
+ aprio = PRIORITY_LOW;
+ break;
+ default:
+ ERTS_INTERNAL_ERROR("Invalid qmask");
+ aprio = -1;
+ }
+
+ if (aprio > nprio) /* low value -> high prio */
+ aprio = nprio;
+ }
+
+ n &= ~(ERTS_PSFLGS_USR_PRIO_MASK
+ | ERTS_PSFLGS_ACT_PRIO_MASK);
+ n |= ((nprio << ERTS_PSFLGS_USR_PRIO_OFFSET)
+ | (aprio << ERTS_PSFLGS_ACT_PRIO_OFFSET));
- n &= ~ERTS_PSFLG_PRIO_MASK;
- n |= nprio;
a = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e);
} while (a != e);
}
@@ -6763,6 +7105,7 @@ erts_set_process_priority(Process *p, Eterm value)
Process *schedule(Process *p, int calls)
{
+ Process *proxy_p = NULL;
ErtsRunQueue *rq;
erts_aint_t dt;
ErtsSchedulerData *esdp;
@@ -6805,6 +7148,8 @@ Process *schedule(Process *p, int calls)
actual_reds = reds = 0;
erts_smp_runq_lock(rq);
} else {
+ sched_out_proc:
+
#ifdef ERTS_SMP
ERTS_SMP_CHK_HAVE_ONLY_MAIN_PROC_LOCK(p);
esdp = p->scheduler_data;
@@ -6858,10 +7203,11 @@ Process *schedule(Process *p, int calls)
esdp->reductions += reds;
- schedule_out_process(rq, state, p); /* Returns with rq locked! */
+ schedule_out_process(rq, state, p, proxy_p); /* Returns with rq locked! */
+ proxy_p = NULL;
ERTS_PROC_REDUCTIONS_EXECUTED(rq,
- (int) (state & ERTS_PSFLG_PRIO_MASK),
+ (int) ERTS_PSFLGS_GET_USR_PRIO(state),
reds,
actual_reds);
@@ -6870,18 +7216,19 @@ Process *schedule(Process *p, int calls)
p->scheduler_data = NULL;
#endif
+ erts_smp_proc_unlock(p, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS);
if (state & ERTS_PSFLG_FREE) {
#ifdef ERTS_SMP
ASSERT(esdp->free_process == p);
esdp->free_process = NULL;
-#else
- erts_free_proc(p);
+#else
+ state = erts_smp_atomic32_read_nob(&p->state);
+ if (!(state & ERTS_PSFLG_IN_RUNQ))
+ erts_free_proc(p);
#endif
}
- erts_smp_proc_unlock(p, ERTS_PROC_LOCK_MAIN|ERTS_PROC_LOCK_STATUS);
-
#ifdef ERTS_SMP
ASSERT(!esdp->free_process);
#endif
@@ -7088,6 +7435,8 @@ Process *schedule(Process *p, int calls)
* Find a new process to run.
*/
pick_next_process: {
+ erts_aint32_t psflg_band_mask;
+ erts_aint32_t running_flag;
int prio_q;
int qmask;
@@ -7121,18 +7470,62 @@ Process *schedule(Process *p, int calls)
ASSERT(p); /* Wrong qmask in rq->flags? */
+ psflg_band_mask = ~(((erts_aint32_t) 1) << (ERTS_PSFLGS_GET_PRQ_PRIO(state)
+ + ERTS_PSFLGS_IN_PRQ_MASK_OFFSET));
+
+ if (!(state & ERTS_PSFLG_PROXY))
+ psflg_band_mask &= ~ERTS_PSFLG_IN_RUNQ;
+ else {
+ proxy_p = p;
+ p = erts_proc_lookup_raw(proxy_p->common.id);
+ if (!p) {
+ free_proxy_proc(proxy_p);
+ proxy_p = NULL;
+ goto pick_next_process;
+ }
+ state = erts_smp_atomic32_read_nob(&p->state);
+ }
+
+
+ if (state & ERTS_PSFLG_ACTIVE_SYS)
+ running_flag = ERTS_PSFLG_RUNNING_SYS;
+ else
+ running_flag = ERTS_PSFLG_RUNNING;
+
while (1) {
erts_aint32_t exp, new, tmp;
tmp = new = exp = state;
- new &= ~ERTS_PSFLG_IN_RUNQ;
- tmp = state & (ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_PENDING_EXIT);
- if (tmp != ERTS_PSFLG_SUSPENDED)
- new |= ERTS_PSFLG_RUNNING;
+ new &= psflg_band_mask;
+ if (!(state & (ERTS_PSFLG_RUNNING
+ | ERTS_PSFLG_RUNNING_SYS))) {
+ tmp = state & (ERTS_PSFLG_SUSPENDED
+ | ERTS_PSFLG_PENDING_EXIT
+ | ERTS_PSFLG_ACTIVE_SYS);
+ if (tmp != ERTS_PSFLG_SUSPENDED)
+ new |= running_flag;
+ }
state = erts_smp_atomic32_cmpxchg_relb(&p->state, new, exp);
if (state == exp) {
- tmp = state & (ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_PENDING_EXIT);
- if (tmp == ERTS_PSFLG_SUSPENDED)
+ if ((state & (ERTS_PSFLG_RUNNING
+ | ERTS_PSFLG_RUNNING_SYS
+ | ERTS_PSFLG_FREE))
+ || ((state & (ERTS_PSFLG_SUSPENDED
+ | ERTS_PSFLG_PENDING_EXIT
+ | ERTS_PSFLG_ACTIVE_SYS))
+ == ERTS_PSFLG_SUSPENDED)) {
+ if (state & ERTS_PSFLG_FREE) {
+#ifdef ERTS_SMP
+ erts_smp_proc_dec_refc(p);
+#else
+ erts_free_proc(p);
+#endif
+ }
+ if (proxy_p) {
+ free_proxy_proc(proxy_p);
+ proxy_p = NULL;
+ }
goto pick_next_process;
+ }
state = new;
break;
}
@@ -7162,7 +7555,7 @@ Process *schedule(Process *p, int calls)
(UWord) esdp->no);
int migrated = old && old != esdp->no;
- prio = (int) (state & ERTS_PSFLG_PRIO_MASK);
+ prio = (int) ERTS_PSFLGS_GET_USR_PRIO(state);
erts_smp_spin_lock(&erts_sched_stat.lock);
erts_sched_stat.prio[prio].total_executed++;
@@ -7182,9 +7575,6 @@ Process *schedule(Process *p, int calls)
ASSERT(!p->scheduler_data);
p->scheduler_data = esdp;
#endif
- /* Never run a suspended process */
- ASSERT(!(ERTS_PSFLG_SUSPENDED & erts_smp_atomic32_read_nob(&p->state)));
-
reds = context_reds;
if (IS_TRACED(p)) {
@@ -7210,21 +7600,574 @@ Process *schedule(Process *p, int calls)
erts_check_my_tracer_proc(p);
#endif
+ if (state & ERTS_PSFLG_RUNNING_SYS) {
+ reds -= execute_sys_tasks(p, &state, reds);
+ if (reds <= 0) {
+ p->fcalls = reds;
+ goto sched_out_proc;
+ }
+
+ ASSERT(state & ERTS_PSFLG_RUNNING_SYS);
+ ASSERT(!(state & ERTS_PSFLG_RUNNING));
+
+ while (1) {
+ erts_aint32_t n, e;
+
+ if (((state & (ERTS_PSFLG_SUSPENDED
+ | ERTS_PSFLG_ACTIVE)) != ERTS_PSFLG_ACTIVE)
+ && !(state & ERTS_PSFLG_EXITING))
+ goto sched_out_proc;
+
+ n = e = state;
+ n &= ~ERTS_PSFLG_RUNNING_SYS;
+ n |= ERTS_PSFLG_RUNNING;
+
+ state = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e);
+ if (state == e) {
+ state = n;
+ break;
+ }
+
+ ASSERT(state & ERTS_PSFLG_RUNNING_SYS);
+ ASSERT(!(state & ERTS_PSFLG_RUNNING));
+ }
+ }
+
if (!(state & ERTS_PSFLG_EXITING)
&& ((FLAGS(p) & F_FORCE_GC)
|| (MSO(p).overhead > BIN_VHEAP_SZ(p)))) {
reds -= erts_garbage_collect(p, 0, p->arg_reg, p->arity);
- if (reds < 0) {
- reds = 1;
+ if (reds <= 0) {
+ p->fcalls = reds;
+ goto sched_out_proc;
}
}
+
+ if (proxy_p) {
+ free_proxy_proc(proxy_p);
+ proxy_p = NULL;
+ }
p->fcalls = reds;
ERTS_SMP_CHK_HAVE_ONLY_MAIN_PROC_LOCK(p);
+
+ /* Never run a suspended process */
+ ASSERT(!(ERTS_PSFLG_SUSPENDED & erts_smp_atomic32_read_nob(&p->state)));
+
return p;
}
}
+static int
+notify_sys_task_executed(Process *c_p, ErtsProcSysTask *st, Eterm st_result)
+{
+ Process *rp = erts_proc_lookup(st->requester);
+ if (rp) {
+ ErtsProcLocks rp_locks;
+ ErlOffHeap *ohp;
+ ErlHeapFragment* bp;
+ Eterm *hp, msg, req_id, result;
+ Uint st_result_sz, hsz;
+#ifdef DEBUG
+ Eterm *hp_start;
+#endif
+
+ rp_locks = (c_p == rp) ? ERTS_PROC_LOCK_MAIN : 0;
+
+ st_result_sz = is_immed(st_result) ? 0 : size_object(st_result);
+ hsz = st->req_id_sz + st_result_sz + 4 /* 3-tuple */;
+
+ hp = erts_alloc_message_heap(hsz,
+ &bp,
+ &ohp,
+ rp,
+ &rp_locks);
+
+#ifdef DEBUG
+ hp_start = hp;
+#endif
+
+ req_id = st->req_id_sz == 0 ? st->req_id : copy_struct(st->req_id,
+ st->req_id_sz,
+ &hp,
+ ohp);
+
+ result = st_result_sz == 0 ? st_result : copy_struct(st_result,
+ st_result_sz,
+ &hp,
+ ohp);
+
+ ASSERT(is_immed(st->reply_tag));
+
+ msg = TUPLE3(hp, st->reply_tag, req_id, result);
+
+#ifdef DEBUG
+ hp += 4;
+ ASSERT(hp_start + hsz == hp);
+#endif
+
+ erts_queue_message(rp,
+ &rp_locks,
+ bp,
+ msg,
+ NIL
+#ifdef USE_VM_PROBES
+ , NIL
+#endif
+ );
+
+ if (c_p == rp)
+ rp_locks &= ~ERTS_PROC_LOCK_MAIN;
+
+ if (rp_locks)
+ erts_smp_proc_unlock(rp, rp_locks);
+ }
+
+ erts_cleanup_offheap(&st->off_heap);
+
+ erts_free(ERTS_ALC_T_PROC_SYS_TSK, st);
+
+ return rp ? 1 : 0;
+}
+
+static ERTS_INLINE ErtsProcSysTask *
+fetch_sys_task(Process *c_p, erts_aint32_t state, int *qmaskp)
+{
+ ErtsProcSysTaskQs *unused_qs = NULL;
+ int qbit, qmask;
+ ErtsProcSysTask *st, **qp;
+
+ erts_smp_proc_lock(c_p, ERTS_PROC_LOCK_STATUS);
+
+ if (!c_p->sys_task_qs) {
+ qmask = 0;
+ st = NULL;
+ goto update_state;
+ }
+
+ qmask = c_p->sys_task_qs->qmask;
+
+ if ((state & (ERTS_PSFLG_ACTIVE
+ | ERTS_PSFLG_EXITING
+ | ERTS_PSFLG_SUSPENDED)) == ERTS_PSFLG_ACTIVE) {
+ /* No sys tasks if we got exclusively higher prio user work to do */
+ st = NULL;
+ switch (ERTS_PSFLGS_GET_USR_PRIO(state)) {
+ case PRIORITY_MAX:
+ if (!(qmask & MAX_BIT))
+ goto done;
+ break;
+ case PRIORITY_HIGH:
+ if (!(qmask & (MAX_BIT|HIGH_BIT)))
+ goto done;
+ break;
+ default:
+ break;
+ }
+ }
+
+ qbit = qmask & -qmask;
+ switch (qbit) {
+ case MAX_BIT:
+ qp = &c_p->sys_task_qs->q[PRIORITY_MAX];
+ break;
+ case HIGH_BIT:
+ qp = &c_p->sys_task_qs->q[PRIORITY_HIGH];
+ break;
+ case NORMAL_BIT:
+ if (!(qmask & PRIORITY_LOW)
+ || ++c_p->sys_task_qs->ncount <= RESCHEDULE_LOW) {
+ qp = &c_p->sys_task_qs->q[PRIORITY_NORMAL];
+ break;
+ }
+ c_p->sys_task_qs->ncount = 0;
+ /* Fall through */
+ case LOW_BIT:
+ qp = &c_p->sys_task_qs->q[PRIORITY_LOW];
+ break;
+ default:
+ ERTS_INTERNAL_ERROR("Invalid qmask");
+ }
+
+ st = *qp;
+ ASSERT(st);
+ if (st->next != st) {
+ *qp = st->next;
+ st->next->prev = st->prev;
+ st->prev->next = st->next;
+ }
+ else {
+ erts_aint32_t a, e, n, st_prio, qmask2;
+
+ *qp = NULL;
+ qmask &= ~qbit;
+ c_p->sys_task_qs->qmask = qmask;
+
+ update_state:
+
+ qmask2 = qmask;
+
+ switch (qmask2 & -qmask2) {
+ case MAX_BIT:
+ st_prio = PRIORITY_MAX;
+ break;
+ case HIGH_BIT:
+ st_prio = PRIORITY_HIGH;
+ break;
+ case NORMAL_BIT:
+ st_prio = PRIORITY_NORMAL;
+ break;
+ case LOW_BIT:
+ st_prio = PRIORITY_LOW;
+ break;
+ case 0:
+ st_prio = PRIORITY_LOW;
+ unused_qs = c_p->sys_task_qs;
+ c_p->sys_task_qs = NULL;
+ break;
+ default:
+ ERTS_INTERNAL_ERROR("Invalid qmask");
+ }
+
+ a = state;
+ do {
+ erts_aint32_t prio = ERTS_PSFLGS_GET_USR_PRIO(a);
+
+ if (prio > st_prio)
+ prio = st_prio;
+
+ n = e = a;
+
+ n &= ~ERTS_PSFLGS_ACT_PRIO_MASK;
+ n |= (prio << ERTS_PSFLGS_ACT_PRIO_OFFSET);
+
+ if (!qmask)
+ n &= ~ERTS_PSFLG_ACTIVE_SYS;
+
+ if (a == n)
+ break;
+ a = erts_smp_atomic32_cmpxchg_nob(&c_p->state, n, e);
+ } while (a != e);
+ }
+
+done:
+
+ erts_smp_proc_unlock(c_p, ERTS_PROC_LOCK_STATUS);
+
+ if (unused_qs)
+ proc_sys_task_queues_free(unused_qs);
+
+ *qmaskp = qmask;
+
+ return st;
+}
+
+static int
+execute_sys_tasks(Process *c_p, erts_aint32_t *statep, int in_reds)
+{
+ int garbage_collected = 0;
+ erts_aint32_t state = *statep;
+ int max_reds = in_reds;
+ int reds = 0;
+ int qmask = 0;
+
+ ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks(c_p) == ERTS_PROC_LOCK_MAIN);
+
+ do {
+ ErtsProcSysTask *st;
+ Eterm st_res;
+
+ if (state & (ERTS_PSFLG_EXITING|ERTS_PSFLG_PENDING_EXIT)) {
+#ifdef ERTS_SMP
+ if (state & ERTS_PSFLG_PENDING_EXIT)
+ erts_handle_pending_exit(c_p, ERTS_PROC_LOCK_MAIN);
+#endif
+ ASSERT(ERTS_PROC_IS_EXITING(c_p));
+ break;
+ }
+
+ st = fetch_sys_task(c_p, state, &qmask);
+ if (!st)
+ break;
+
+ switch (st->type) {
+ case ERTS_PSTT_GC:
+ if (!garbage_collected) {
+ FLAGS(c_p) |= F_NEED_FULLSWEEP;
+ reds += erts_garbage_collect(c_p, 0, c_p->arg_reg, c_p->arity);
+ garbage_collected = 1;
+ }
+ st_res = am_true;
+ break;
+ case ERTS_PSTT_CPC:
+ st_res = erts_check_process_code(c_p,
+ st->arg[0],
+ st->arg[1] == am_true,
+ &reds);
+ break;
+ default:
+ ERTS_INTERNAL_ERROR("Invalid process sys task type");
+ st_res = am_false;
+ }
+
+ if (st)
+ reds += notify_sys_task_executed(c_p, st, st_res);
+
+ state = erts_smp_atomic32_read_acqb(&c_p->state);
+ } while (qmask && reds < max_reds);
+
+ *statep = state;
+
+ return reds;
+}
+
+static int
+cleanup_sys_tasks(Process *c_p, erts_aint32_t in_state, int in_reds)
+{
+ erts_aint32_t state = in_state;
+ int max_reds = in_reds;
+ int reds = 0;
+ int qmask = 0;
+
+ ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks(c_p) == ERTS_PROC_LOCK_MAIN);
+
+ do {
+ ErtsProcSysTask *st;
+ Eterm st_res;
+
+ st = fetch_sys_task(c_p, state, &qmask);
+ if (!st)
+ break;
+
+ switch (st->type) {
+ case ERTS_PSTT_GC:
+ st_res = am_false;
+ break;
+ case ERTS_PSTT_CPC:
+ st_res = am_false;
+ break;
+ default:
+ ERTS_INTERNAL_ERROR("Invalid process sys task type");
+ st_res = am_false;
+ break;
+ }
+
+ reds += notify_sys_task_executed(c_p, st, st_res);
+
+ state = erts_smp_atomic32_read_acqb(&c_p->state);
+ } while (qmask && reds < max_reds);
+
+ return reds;
+}
+
+BIF_RETTYPE
+erts_internal_request_system_task_3(BIF_ALIST_3)
+{
+ Process *rp = erts_proc_lookup(BIF_ARG_1);
+ ErtsProcSysTaskQs *stqs, *free_stqs = NULL;
+ ErtsProcSysTask *st = NULL;
+ erts_aint32_t prio, rp_state;
+ int rp_locked;
+ Eterm noproc_res, req_type;
+
+ if (!rp && !is_internal_pid(BIF_ARG_1)) {
+ if (!is_external_pid(BIF_ARG_1))
+ goto badarg;
+ if (external_pid_dist_entry(BIF_ARG_1) != erts_this_dist_entry)
+ goto badarg;
+ }
+
+ switch (BIF_ARG_2) {
+ case am_max: prio = PRIORITY_MAX; break;
+ case am_high: prio = PRIORITY_HIGH; break;
+ case am_normal: prio = PRIORITY_NORMAL; break;
+ case am_low: prio = PRIORITY_LOW; break;
+ default: goto badarg;
+ }
+
+ if (is_not_tuple(BIF_ARG_3))
+ goto badarg;
+ else {
+ int i;
+ Eterm *tp = tuple_val(BIF_ARG_3);
+ Uint arity = arityval(*tp);
+ Eterm req_id;
+ Uint req_id_sz;
+ Eterm arg[ERTS_MAX_PROC_SYS_TASK_ARGS];
+ Uint arg_sz[ERTS_MAX_PROC_SYS_TASK_ARGS];
+ Uint tot_sz;
+ Eterm *hp;
+
+ if (arity < 2)
+ goto badarg;
+ if (arity > 2 + ERTS_MAX_PROC_SYS_TASK_ARGS)
+ goto badarg;
+ req_type = tp[1];
+ req_id = tp[2];
+ req_id_sz = is_immed(req_id) ? req_id : size_object(req_id);
+ tot_sz = req_id_sz;
+ for (i = 0; i < ERTS_MAX_PROC_SYS_TASK_ARGS; i++) {
+ int tix = 3 + i;
+ if (tix > arity) {
+ arg[i] = THE_NON_VALUE;
+ arg_sz[i] = 0;
+ }
+ else {
+ arg[i] = tp[tix];
+ if (is_immed(arg[i]))
+ arg_sz[i] = 0;
+ else {
+ arg_sz[i] = size_object(arg[i]);
+ tot_sz += arg_sz[i];
+ }
+ }
+ }
+ st = erts_alloc(ERTS_ALC_T_PROC_SYS_TSK,
+ ERTS_PROC_SYS_TASK_SIZE(tot_sz));
+ st->next = st->prev = st; /* Prep for empty prio queue */
+ ERTS_INIT_OFF_HEAP(&st->off_heap);
+ hp = &st->heap[0];
+
+ st->requester = BIF_P->common.id;
+ st->reply_tag = req_type;
+ st->req_id_sz = req_id_sz;
+ st->req_id = req_id_sz == 0 ? req_id : copy_struct(req_id,
+ req_id_sz,
+ &hp,
+ &st->off_heap);
+
+ for (i = 0; i < ERTS_MAX_PROC_SYS_TASK_ARGS; i++)
+ st->arg[i] = arg_sz[i] == 0 ? arg[i] : copy_struct(arg[i],
+ arg_sz[i],
+ &hp,
+ &st->off_heap);
+ ASSERT(&st->heap[0] + tot_sz == hp);
+ }
+
+ switch (req_type) {
+
+ case am_garbage_collect:
+ st->type = ERTS_PSTT_GC;
+ noproc_res = am_false;
+ if (!rp)
+ goto noproc;
+ break;
+
+ case am_check_process_code:
+ if (is_not_atom(st->arg[0]))
+ goto badarg;
+ if (st->arg[1] != am_true && st->arg[1] != am_false)
+ goto badarg;
+ noproc_res = am_false;
+ st->type = ERTS_PSTT_CPC;
+ if (!rp)
+ goto noproc;
+ break;
+
+ default:
+ goto badarg;
+ }
+
+ rp_state = erts_smp_atomic32_read_nob(&rp->state);
+
+ rp_locked = 0;
+
+ free_stqs = NULL;
+ if (rp_state & ERTS_PSFLG_ACTIVE_SYS)
+ stqs = NULL;
+ else {
+ alloc_qs:
+ stqs = proc_sys_task_queues_alloc();
+ stqs->qmask = 1 << prio;
+ stqs->ncount = 0;
+ stqs->q[PRIORITY_MAX] = NULL;
+ stqs->q[PRIORITY_HIGH] = NULL;
+ stqs->q[PRIORITY_NORMAL] = NULL;
+ stqs->q[PRIORITY_LOW] = NULL;
+ stqs->q[prio] = st;
+ }
+
+ if (!rp_locked) {
+ rp_locked = 1;
+ erts_smp_proc_lock(rp, ERTS_PROC_LOCK_STATUS);
+
+ rp_state = erts_smp_atomic32_read_nob(&rp->state);
+ if (rp_state & ERTS_PSFLG_EXITING) {
+ erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_STATUS);
+ rp = NULL;
+ free_stqs = stqs;
+ goto noproc;
+ }
+ }
+
+ if (!rp->sys_task_qs) {
+ if (stqs)
+ rp->sys_task_qs = stqs;
+ else
+ goto alloc_qs;
+ }
+ else {
+ if (stqs)
+ free_stqs = stqs;
+ stqs = rp->sys_task_qs;
+ if (!stqs->q[prio]) {
+ stqs->q[prio] = st;
+ stqs->qmask |= 1 << prio;
+ }
+ else {
+ st->next = stqs->q[prio];
+ st->prev = stqs->q[prio]->prev;
+ st->next->prev = st;
+ st->prev->next = st;
+ ASSERT(stqs->qmask & (1 << prio));
+ }
+ }
+
+ if (ERTS_PSFLGS_GET_ACT_PRIO(rp_state) > prio) {
+ erts_aint32_t n, a, e;
+ /* Need to elevate actual prio */
+
+ a = rp_state;
+ do {
+ if (ERTS_PSFLGS_GET_ACT_PRIO(a) <= prio) {
+ n = a;
+ break;
+ }
+ n = e = a;
+ n &= ~ERTS_PSFLGS_ACT_PRIO_MASK;
+ n |= (prio << ERTS_PSFLGS_ACT_PRIO_OFFSET);
+ a = erts_smp_atomic32_cmpxchg_nob(&rp->state, n, e);
+ } while (a != e);
+ rp_state = n;
+ }
+
+ erts_smp_proc_unlock(rp, ERTS_PROC_LOCK_STATUS);
+
+ schedule_process_sys_task(rp, rp_state, NULL);
+
+ if (free_stqs)
+ proc_sys_task_queues_free(free_stqs);
+
+ BIF_RET(am_ok);
+
+noproc:
+
+ notify_sys_task_executed(BIF_P, st, noproc_res);
+ if (free_stqs)
+ proc_sys_task_queues_free(free_stqs);
+ BIF_RET(am_ok);
+
+badarg:
+
+ if (st) {
+ erts_cleanup_offheap(&st->off_heap);
+ erts_free(ERTS_ALC_T_PROC_SYS_TSK, st);
+ }
+ if (free_stqs)
+ proc_sys_task_queues_free(free_stqs);
+ BIF_ERROR(BIF_P, BADARG);
+}
+
void
erts_sched_stat_modify(int what)
{
@@ -7520,7 +8463,8 @@ erl_create_process(Process* parent, /* Parent of process (default group leader).
prio = (erts_aint32_t) so->priority;
}
- state |= (prio & ERTS_PSFLG_PRIO_MASK);
+ state |= (((prio & ERTS_PSFLGS_PRIO_MASK) << ERTS_PSFLGS_ACT_PRIO_OFFSET)
+ | ((prio & ERTS_PSFLGS_PRIO_MASK) << ERTS_PSFLGS_USR_PRIO_OFFSET));
if (!rq)
rq = erts_get_runq_proc(parent);
@@ -7599,6 +8543,8 @@ erl_create_process(Process* parent, /* Parent of process (default group leader).
p->bin_old_vheap = 0;
p->bin_vheap_mature = 0;
+ p->sys_task_qs = NULL;
+
/* No need to initialize p->fcalls. */
p->current = p->initial+INITIAL_MOD;
@@ -7764,7 +8710,7 @@ erl_create_process(Process* parent, /* Parent of process (default group leader).
* Schedule process for execution.
*/
- schedule_process(p, state, 0);
+ schedule_process(p, state);
VERBOSE(DEBUG_PROCESSES, ("Created a new process: %T\n",p->common.id));
@@ -7815,6 +8761,7 @@ void erts_init_empty_process(Process *p)
p->bin_vheap_sz = BIN_VH_MIN_SIZE;
p->bin_old_vheap_sz = BIN_VH_MIN_SIZE;
p->bin_old_vheap = 0;
+ p->sys_task_qs = NULL;
p->bin_vheap_mature = 0;
#ifdef ERTS_SMP
p->common.u.alive.ptimer = NULL;
@@ -8070,33 +9017,21 @@ delete_process(Process* p)
p->fvalue = NIL;
}
-static ERTS_INLINE erts_aint32_t
-set_proc_exiting_state(Process *p, erts_aint32_t state)
-{
- erts_aint32_t a, n, e;
- a = state;
- while (1) {
- n = e = a;
- n &= ~(ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_PENDING_EXIT);
- n |= ERTS_PSFLG_EXITING|ERTS_PSFLG_ACTIVE;
- if (!(a & (ERTS_PSFLG_IN_RUNQ|ERTS_PSFLG_RUNNING)))
- n |= ERTS_PSFLG_IN_RUNQ;
- a = erts_smp_atomic32_cmpxchg_relb(&p->state, n, e);
- if (a == e)
- break;
- }
- return a;
-}
-
static ERTS_INLINE void
set_proc_exiting(Process *p,
- erts_aint32_t state,
+ erts_aint32_t in_state,
Eterm reason,
ErlHeapFragment *bp)
{
+ erts_aint32_t state = in_state, enq_prio = -1;
+ int enqueue;
ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks(p) == ERTS_PROC_LOCKS_ALL);
- state = set_proc_exiting_state(p, state);
+ enqueue = change_proc_schedule_state(p,
+ ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_PENDING_EXIT,
+ ERTS_PSFLG_EXITING|ERTS_PSFLG_ACTIVE,
+ &state,
+ &enq_prio);
p->fvalue = reason;
if (bp)
@@ -8111,15 +9046,37 @@ set_proc_exiting(Process *p,
cancel_timer(p);
p->i = (BeamInstr *) beam_exit;
- if (erts_system_profile_flags.runnable_procs
- && !(state & (ERTS_PSFLG_ACTIVE|ERTS_PSFLG_SUSPENDED))) {
- profile_runnable_proc(p, am_active);
- }
-
- if (!(state & (ERTS_PSFLG_IN_RUNQ|ERTS_PSFLG_RUNNING)))
- add2runq(p, state);
+ if (enqueue)
+ add2runq(enqueue > 0 ? p : make_proxy_proc(NULL, p, enq_prio),
+ state,
+ enq_prio);
}
+static ERTS_INLINE erts_aint32_t
+set_proc_self_exiting(Process *c_p)
+{
+#ifdef DEBUG
+ int enqueue;
+#endif
+ erts_aint32_t state, enq_prio = -1;
+
+ ERTS_SMP_LC_ASSERT(erts_proc_lc_my_proc_locks(c_p) == ERTS_PROC_LOCKS_ALL);
+
+ state = erts_smp_atomic32_read_nob(&c_p->state);
+ ASSERT(state & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_RUNNING_SYS));
+
+#ifdef DEBUG
+ enqueue =
+#endif
+ change_proc_schedule_state(c_p,
+ ERTS_PSFLG_SUSPENDED|ERTS_PSFLG_PENDING_EXIT,
+ ERTS_PSFLG_EXITING|ERTS_PSFLG_ACTIVE,
+ &state,
+ &enq_prio);
+
+ ASSERT(!enqueue);
+ return state;
+}
#ifdef ERTS_SMP
@@ -8167,7 +9124,7 @@ handle_pending_exiters(ErtsProcList *pnd_xtrs)
if (p) {
if (erts_proclist_same(plp, p)) {
erts_aint32_t state = erts_smp_atomic32_read_acqb(&p->state);
- if (!(state & ERTS_PSFLG_RUNNING)) {
+ if (!(state & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_RUNNING_SYS))) {
ASSERT(state & ERTS_PSFLG_PENDING_EXIT);
erts_handle_pending_exit(p, ERTS_PROC_LOCKS_ALL);
}
@@ -8388,7 +9345,7 @@ send_exit_signal(Process *c_p, /* current process if and only
}
set_proc_exiting(c_p, state, rsn, NULL);
}
- else if (!(state & ERTS_PSFLG_RUNNING)) {
+ else if (!(state & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_RUNNING_SYS))) {
/* Process not running ... */
ErtsProcLocks need_locks = ~(*rp_locks) & ERTS_PROC_LOCKS_ALL;
if (need_locks
@@ -8765,9 +9722,6 @@ resume_suspend_monitor(ErtsSuspendMonitor *smon, void *vc_p)
void
erts_do_exit_process(Process* p, Eterm reason)
{
-#ifdef ERTS_SMP
- erts_aint32_t state;
-#endif
p->arity = 0; /* No live registers */
p->fvalue = reason;
@@ -8792,10 +9746,9 @@ erts_do_exit_process(Process* p, Eterm reason)
#endif
#ifndef ERTS_SMP
- set_proc_exiting_state(p, erts_smp_atomic32_read_nob(&p->state));
+ set_proc_self_exiting(p);
#else
- state = set_proc_exiting_state(p, erts_smp_atomic32_read_nob(&p->state));
- if (state & ERTS_PSFLG_PENDING_EXIT) {
+ if (ERTS_PSFLG_PENDING_EXIT & set_proc_self_exiting(p)) {
/* Process exited before pending exit was received... */
p->pending_exit.reason = THE_NON_VALUE;
if (p->pending_exit.bp) {
@@ -8849,6 +9802,7 @@ erts_continue_exit_process(Process *p)
DistEntry *dep;
struct saved_calls *scb;
process_breakpoint_time_t *pbt;
+ erts_aint32_t state;
#ifdef DEBUG
int yield_allowed = 1;
@@ -8885,6 +9839,12 @@ erts_continue_exit_process(Process *p)
p->flags &= ~F_USING_DB;
}
+ state = erts_smp_atomic32_read_acqb(&p->state);
+ if (state & ERTS_PSFLG_ACTIVE_SYS) {
+ if (cleanup_sys_tasks(p, state, CONTEXT_REDS) >= CONTEXT_REDS/2)
+ goto yield;
+ }
+
if (p->flags & F_USING_DDLL) {
erts_ddll_proc_dead(p, ERTS_PROC_LOCK_MAIN);
p->flags &= ~F_USING_DDLL;
@@ -8962,17 +9922,31 @@ erts_continue_exit_process(Process *p)
{
/* Inactivate and notify free */
erts_aint32_t n, e, a = erts_smp_atomic32_read_nob(&p->state);
+#ifdef ERTS_SMP
+ int refc_inced = 0;
+#endif
while (1) {
n = e = a;
ASSERT(a & ERTS_PSFLG_EXITING);
n |= ERTS_PSFLG_FREE;
n &= ~ERTS_PSFLG_ACTIVE;
+#ifdef ERTS_SMP
+ if ((n & ERTS_PSFLG_IN_RUNQ) && !refc_inced) {
+ erts_smp_proc_inc_refc(p);
+ refc_inced = 1;
+ }
+#endif
a = erts_smp_atomic32_cmpxchg_mb(&p->state, n, e);
if (a == e)
break;
}
- }
+#ifdef ERTS_SMP
+ if (refc_inced && !(n & ERTS_PSFLG_IN_RUNQ))
+ erts_smp_proc_dec_refc(p);
+#endif
+ }
+
dep = ((p->flags & F_DISTRIBUTION)
? ERTS_PROC_SET_DIST_ENTRY(p, ERTS_PROC_LOCKS_ALL, NULL)
: NULL);
@@ -9075,7 +10049,7 @@ timeout_proc(Process* p)
state = erts_smp_atomic32_read_acqb(&p->state);
if (!(state & ERTS_PSFLG_ACTIVE))
- schedule_process(p, state, 0);
+ schedule_process(p, state);
}
@@ -9153,7 +10127,9 @@ erts_program_counter_info(int to, void *to_arg, Process *p)
print_function_from_pc(to, to_arg, p->cp);
erts_print(to, to_arg, ")\n");
state = erts_smp_atomic32_read_acqb(&p->state);
- if (!(state & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_GC))) {
+ if (!(state & (ERTS_PSFLG_RUNNING
+ | ERTS_PSFLG_RUNNING_SYS
+ | ERTS_PSFLG_GC))) {
erts_print(to, to_arg, "arity = %d\n",p->arity);
if (!ERTS_IS_CRASH_DUMPING) {
/*
diff --git a/erts/emulator/beam/erl_process.h b/erts/emulator/beam/erl_process.h
index 8e5467f196..814e3d34df 100644
--- a/erts/emulator/beam/erl_process.h
+++ b/erts/emulator/beam/erl_process.h
@@ -688,6 +688,9 @@ typedef struct {
ErlHeapFragment *bp;
} ErtsPendExit;
+typedef struct ErtsProcSysTask_ ErtsProcSysTask;
+typedef struct ErtsProcSysTaskQs_ ErtsProcSysTaskQs;
+
#ifdef ERTS_SMP
typedef struct ErtsPendingSuspend_ ErtsPendingSuspend;
@@ -855,6 +858,7 @@ struct process {
Uint64 bin_old_vheap_sz; /* Virtual old heap block size for binaries */
Uint64 bin_old_vheap; /* Virtual old heap size for binaries */
+ ErtsProcSysTaskQs *sys_task_qs;
erts_smp_atomic32_t state; /* Process state flags (see ERTS_PSFLG_*) */
#ifdef ERTS_SMP
@@ -924,24 +928,66 @@ void erts_check_for_holes(Process* p);
# error "Need to increase ERTS_PSFLG_PRIO_SHIFT"
#endif
-#define ERTS_PSFLG_PRIO_SHIFT 2
+#define ERTS_PSFLGS_PRIO_BITS 2
+#define ERTS_PSFLGS_PRIO_MASK \
+ ((((erts_aint32_t) 1) << ERTS_PSFLGS_PRIO_BITS) - 1)
-#define ERTS_PSFLG_BIT(N) \
- (((erts_aint32_t) 1) << (ERTS_PSFLG_PRIO_SHIFT + (N)))
+#define ERTS_PSFLGS_ACT_PRIO_OFFSET (0*ERTS_PSFLGS_PRIO_BITS)
+#define ERTS_PSFLGS_USR_PRIO_OFFSET (1*ERTS_PSFLGS_PRIO_BITS)
+#define ERTS_PSFLGS_PRQ_PRIO_OFFSET (2*ERTS_PSFLGS_PRIO_BITS)
+#define ERTS_PSFLGS_ZERO_BIT_OFFSET (3*ERTS_PSFLGS_PRIO_BITS)
-#define ERTS_PSFLG_PRIO_MASK (ERTS_PSFLG_BIT(0) - 1)
+#define ERTS_PSFLGS_QMASK_BITS 4
+#define ERTS_PSFLGS_QMASK \
+ ((((erts_aint32_t) 1) << ERTS_PSFLGS_QMASK_BITS) - 1)
+#define ERTS_PSFLGS_IN_PRQ_MASK_OFFSET \
+ ERTS_PSFLGS_ZERO_BIT_OFFSET
-#define ERTS_PSFLG_FREE ERTS_PSFLG_BIT(0)
-#define ERTS_PSFLG_EXITING ERTS_PSFLG_BIT(1)
-#define ERTS_PSFLG_PENDING_EXIT ERTS_PSFLG_BIT(2)
-#define ERTS_PSFLG_ACTIVE ERTS_PSFLG_BIT(3)
-#define ERTS_PSFLG_IN_RUNQ ERTS_PSFLG_BIT(4)
-#define ERTS_PSFLG_RUNNING ERTS_PSFLG_BIT(5)
-#define ERTS_PSFLG_SUSPENDED ERTS_PSFLG_BIT(6)
-#define ERTS_PSFLG_GC ERTS_PSFLG_BIT(7)
-#define ERTS_PSFLG_BOUND ERTS_PSFLG_BIT(8)
-#define ERTS_PSFLG_TRAP_EXIT ERTS_PSFLG_BIT(9)
+#define ERTS_PSFLG_BIT(N) \
+ (((erts_aint32_t) 1) << (ERTS_PSFLGS_ZERO_BIT_OFFSET + (N)))
+/*
+ * ACT_PRIO -> Active prio, i.e., currently active prio. This
+ * prio may be higher than user prio.
+ * USR_PRIO -> User prio. i.e., prio the user has set.
+ * PRQ_PRIO -> Prio queue prio, i.e., prio queue currently
+ * enqueued in.
+ */
+#define ERTS_PSFLGS_ACT_PRIO_MASK \
+ (ERTS_PSFLGS_PRIO_MASK << ERTS_PSFLGS_ACT_PRIO_OFFSET)
+#define ERTS_PSFLGS_USR_PRIO_MASK \
+ (ERTS_PSFLGS_PRIO_MASK << ERTS_PSFLGS_USR_PRIO_OFFSET)
+#define ERTS_PSFLGS_PRQ_PRIO_MASK \
+ (ERTS_PSFLGS_PRIO_MASK << ERTS_PSFLGS_PRQ_PRIO_OFFSET)
+#define ERTS_PSFLG_IN_PRQ_MAX ERTS_PSFLG_BIT(0)
+#define ERTS_PSFLG_IN_PRQ_HIGH ERTS_PSFLG_BIT(1)
+#define ERTS_PSFLG_IN_PRQ_NORMAL ERTS_PSFLG_BIT(2)
+#define ERTS_PSFLG_IN_PRQ_LOW ERTS_PSFLG_BIT(3)
+#define ERTS_PSFLG_FREE ERTS_PSFLG_BIT(4)
+#define ERTS_PSFLG_EXITING ERTS_PSFLG_BIT(5)
+#define ERTS_PSFLG_PENDING_EXIT ERTS_PSFLG_BIT(6)
+#define ERTS_PSFLG_ACTIVE ERTS_PSFLG_BIT(7)
+#define ERTS_PSFLG_IN_RUNQ ERTS_PSFLG_BIT(8)
+#define ERTS_PSFLG_RUNNING ERTS_PSFLG_BIT(9)
+#define ERTS_PSFLG_SUSPENDED ERTS_PSFLG_BIT(10)
+#define ERTS_PSFLG_GC ERTS_PSFLG_BIT(11)
+#define ERTS_PSFLG_BOUND ERTS_PSFLG_BIT(12)
+#define ERTS_PSFLG_TRAP_EXIT ERTS_PSFLG_BIT(13)
+#define ERTS_PSFLG_ACTIVE_SYS ERTS_PSFLG_BIT(14)
+#define ERTS_PSFLG_RUNNING_SYS ERTS_PSFLG_BIT(15)
+#define ERTS_PSFLG_PROXY ERTS_PSFLG_BIT(16)
+
+#define ERTS_PSFLGS_IN_PRQ_MASK (ERTS_PSFLG_IN_PRQ_MAX \
+ | ERTS_PSFLG_IN_PRQ_HIGH \
+ | ERTS_PSFLG_IN_PRQ_NORMAL \
+ | ERTS_PSFLG_IN_PRQ_LOW)
+
+#define ERTS_PSFLGS_GET_ACT_PRIO(PSFLGS) \
+ (((PSFLGS) >> ERTS_PSFLGS_ACT_PRIO_OFFSET) & ERTS_PSFLGS_PRIO_MASK)
+#define ERTS_PSFLGS_GET_USR_PRIO(PSFLGS) \
+ (((PSFLGS) >> ERTS_PSFLGS_USR_PRIO_OFFSET) & ERTS_PSFLGS_PRIO_MASK)
+#define ERTS_PSFLGS_GET_PRQ_PRIO(PSFLGS) \
+ (((PSFLGS) >> ERTS_PSFLGS_USR_PRIO_OFFSET) & ERTS_PSFLGS_PRIO_MASK)
/* The sequential tracing token is a tuple of size 5:
*
diff --git a/erts/emulator/beam/global.h b/erts/emulator/beam/global.h
index bacd5a5752..885f092aca 100755
--- a/erts/emulator/beam/global.h
+++ b/erts/emulator/beam/global.h
@@ -655,6 +655,10 @@ Eterm erl_send(Process *p, Eterm to, Eterm msg);
Eterm erl_is_function(Process* p, Eterm arg1, Eterm arg2);
+/* beam_bif_load.c */
+Eterm erts_check_process_code(Process *c_p, Eterm module, int allow_gc, int *redsp);
+
+
/* beam_load.c */
typedef struct {
BeamInstr* current; /* Pointer to: Mod, Name, Arity */
diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab
index 1e5ae46bfa..c29f3f9b1b 100644
--- a/erts/emulator/beam/ops.tab
+++ b/erts/emulator/beam/ops.tab
@@ -763,17 +763,17 @@ allocate_init t I y
#################################################################
#
-# The BIFs erlang:check_process_code/2 must be called like a function,
+# The BIFs erts_internal:check_process_code/2 must be called like a function,
# to ensure that c_p->i (program counter) is set correctly (an ordinary
# BIF call doesn't set it).
#
-call_ext u==2 Bif=u$bif:erlang:check_process_code/2 => i_call_ext Bif
-call_ext_last u==2 Bif=u$bif:erlang:check_process_code/2 D => i_call_ext_last Bif D
-call_ext_only u==2 Bif=u$bif:erlang:check_process_code/2 => i_call_ext_only Bif
+call_ext u==2 Bif=u$bif:erts_internal:check_process_code/2 => i_call_ext Bif
+call_ext_last u==2 Bif=u$bif:erts_internal:check_process_code/2 D => i_call_ext_last Bif D
+call_ext_only u==2 Bif=u$bif:erts_internal:check_process_code/2 => i_call_ext_only Bif
#
-# The BIFs erlang:garbage_collect/0,1 must be called like functions,
+# The BIFs erlang:garbage_collect/0 must be called like a function,
# to allow them to invoke the garbage collector. (The stack pointer must
# be saved and p->arity must be zeroed, which is not done on ordinary BIF calls.)
#
@@ -782,10 +782,6 @@ call_ext u==0 Bif=u$bif:erlang:garbage_collect/0 => i_call_ext Bif
call_ext_last u==0 Bif=u$bif:erlang:garbage_collect/0 D => i_call_ext_last Bif D
call_ext_only u==0 Bif=u$bif:erlang:garbage_collect/0 => i_call_ext_only Bif
-call_ext u==1 Bif=u$bif:erlang:garbage_collect/1 => i_call_ext Bif
-call_ext_last u==1 Bif=u$bif:erlang:garbage_collect/1 D => i_call_ext_last Bif D
-call_ext_only u==1 Bif=u$bif:erlang:garbage_collect/1 => i_call_ext_only Bif
-
#
# put/2 and erase/1 must be able to do garbage collection, so we must call
# them like functions.
diff --git a/erts/emulator/beam/utils.c b/erts/emulator/beam/utils.c
index bd2be7afca..a5b2cc589c 100644
--- a/erts/emulator/beam/utils.c
+++ b/erts/emulator/beam/utils.c
@@ -1675,7 +1675,7 @@ static int do_send_to_logger(Eterm tag, Eterm gleader, char *buf, int len)
p = erts_whereis_process(NULL, 0, am_error_logger, 0, 0);
if (p) {
erts_aint32_t state = erts_smp_atomic32_read_acqb(&p->state);
- if (state & ERTS_PSFLG_RUNNING)
+ if (state & (ERTS_PSFLG_RUNNING|ERTS_PSFLG_RUNNING_SYS))
p = NULL;
}
}
diff --git a/erts/emulator/hipe/hipe_bif_list.m4 b/erts/emulator/hipe/hipe_bif_list.m4
index 764b8d180c..b1fedf4838 100644
--- a/erts/emulator/hipe/hipe_bif_list.m4
+++ b/erts/emulator/hipe/hipe_bif_list.m4
@@ -151,10 +151,9 @@ standard_bif_interface_0(nbif_ports_0, ports_0)
* BIFs and primops that may do a GC (change heap limit and walk the native stack).
* XXX: erase/1 and put/2 cannot fail
*/
-gc_bif_interface_2(nbif_check_process_code_2, hipe_check_process_code_2)
+gc_bif_interface_2(nbif_erts_internal_check_process_code_2, hipe_erts_internal_check_process_code_2)
gc_bif_interface_1(nbif_erase_1, erase_1)
gc_bif_interface_0(nbif_garbage_collect_0, garbage_collect_0)
-gc_bif_interface_1(nbif_garbage_collect_1, hipe_garbage_collect_1)
gc_nofail_primop_interface_1(nbif_gc_1, hipe_gc)
gc_bif_interface_2(nbif_put_2, put_2)
diff --git a/erts/emulator/hipe/hipe_native_bif.c b/erts/emulator/hipe/hipe_native_bif.c
index 1f76268934..7d343dd91e 100644
--- a/erts/emulator/hipe/hipe_native_bif.c
+++ b/erts/emulator/hipe/hipe_native_bif.c
@@ -41,8 +41,7 @@
*/
/* for -Wmissing-prototypes :-( */
-extern Eterm hipe_check_process_code_2(BIF_ALIST_2);
-extern Eterm hipe_garbage_collect_1(BIF_ALIST_1);
+extern Eterm hipe_erts_internal_check_process_code_2(BIF_ALIST_2);
extern Eterm hipe_show_nstack_1(BIF_ALIST_1);
/* Used when a BIF can trigger a stack walk. */
@@ -51,22 +50,12 @@ static __inline__ void hipe_set_narity(Process *p, unsigned int arity)
p->hipe.narity = arity;
}
-Eterm hipe_check_process_code_2(BIF_ALIST_2)
+Eterm hipe_erts_internal_check_process_code_2(BIF_ALIST_2)
{
Eterm ret;
hipe_set_narity(BIF_P, 2);
- ret = check_process_code_2(BIF_P, BIF__ARGS);
- hipe_set_narity(BIF_P, 0);
- return ret;
-}
-
-Eterm hipe_garbage_collect_1(BIF_ALIST_1)
-{
- Eterm ret;
-
- hipe_set_narity(BIF_P, 1);
- ret = garbage_collect_1(BIF_P, BIF__ARGS);
+ ret = erts_internal_check_process_code_2(BIF_P, BIF__ARGS);
hipe_set_narity(BIF_P, 0);
return ret;
}
diff --git a/erts/emulator/test/process_SUITE.erl b/erts/emulator/test/process_SUITE.erl
index e3aae17df4..e66c6f09b6 100644
--- a/erts/emulator/test/process_SUITE.erl
+++ b/erts/emulator/test/process_SUITE.erl
@@ -51,7 +51,11 @@
processes_term_proc_list/1,
otp_7738_waiting/1, otp_7738_suspended/1,
otp_7738_resume/1,
- garb_other_running/1]).
+ garb_other_running/1,
+ no_priority_inversion/1,
+ no_priority_inversion2/1,
+ system_task_blast/1,
+ system_task_on_suspended/1]).
-export([prio_server/2, prio_client/2]).
-export([init_per_testcase/2, end_per_testcase/2]).
@@ -73,7 +77,8 @@ all() ->
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}, garb_other_running].
+ {group, otp_7738}, garb_other_running,
+ {group, system_task}].
groups() ->
[{t_exit_2, [],
@@ -87,7 +92,10 @@ groups() ->
processes_gc_trap, processes_term_proc_list]},
{otp_7738, [],
[otp_7738_waiting, otp_7738_suspended,
- otp_7738_resume]}].
+ otp_7738_resume]},
+ {system_task, [],
+ [no_priority_inversion, no_priority_inversion2,
+ system_task_blast, system_task_on_suspended]}].
init_per_suite(Config) ->
A0 = case application:start(sasl) of
@@ -2214,6 +2222,154 @@ garb_other_running(Config) when is_list(Config) ->
receive {'DOWN', Mon, process, Pid, normal} -> ok end,
ok.
+no_priority_inversion(Config) when is_list(Config) ->
+ Prio = process_flag(priority, max),
+ HTLs = lists:map(fun (_) ->
+ spawn_opt(fun () ->
+ tok_loop()
+ end,
+ [{priority, high}, monitor, link])
+ end,
+ lists:seq(1, 2*erlang:system_info(schedulers))),
+ receive after 500 -> ok end,
+ LTL = spawn_opt(fun () ->
+ tok_loop()
+ end,
+ [{priority, low}, monitor, link]),
+ false = erlang:check_process_code(element(1, LTL), nonexisting_module),
+ true = erlang:garbage_collect(element(1, LTL)),
+ lists:foreach(fun ({P, _}) ->
+ unlink(P),
+ exit(P, kill)
+ end, [LTL | HTLs]),
+ lists:foreach(fun ({P, M}) ->
+ receive
+ {'DOWN', M, process, P, killed} ->
+ ok
+ end
+ end, [LTL | HTLs]),
+ process_flag(priority, Prio),
+ ok.
+
+no_priority_inversion2(Config) when is_list(Config) ->
+ Prio = process_flag(priority, max),
+ MTLs = lists:map(fun (_) ->
+ spawn_opt(fun () ->
+ tok_loop()
+ end,
+ [{priority, max}, monitor, link])
+ end,
+ lists:seq(1, 2*erlang:system_info(schedulers))),
+ receive after 500 -> ok end,
+ {PL, ML} = spawn_opt(fun () ->
+ tok_loop()
+ end,
+ [{priority, low}, monitor, link]),
+ RL = request_gc(PL, low),
+ RN = request_gc(PL, normal),
+ RH = request_gc(PL, high),
+ receive
+ {garbage_collect, _, _} ->
+ ?t:fail(unexpected_gc)
+ after 1000 ->
+ ok
+ end,
+ RM = request_gc(PL, max),
+ receive
+ {garbage_collect, RM, true} ->
+ ok
+ end,
+ lists:foreach(fun ({P, _}) ->
+ unlink(P),
+ exit(P, kill)
+ end, MTLs),
+ lists:foreach(fun ({P, M}) ->
+ receive
+ {'DOWN', M, process, P, killed} ->
+ ok
+ end
+ end, MTLs),
+ receive
+ {garbage_collect, RH, true} ->
+ ok
+ end,
+ receive
+ {garbage_collect, RN, true} ->
+ ok
+ end,
+ receive
+ {garbage_collect, RL, true} ->
+ ok
+ end,
+ unlink(PL),
+ exit(PL, kill),
+ receive
+ {'DOWN', ML, process, PL, killed} ->
+ ok
+ end,
+ process_flag(priority, Prio),
+ ok.
+
+request_gc(Pid, Prio) ->
+ Ref = make_ref(),
+ erts_internal:request_system_task(Pid, Prio, {garbage_collect, Ref}),
+ Ref.
+
+system_task_blast(Config) when is_list(Config) ->
+ Me = self(),
+ GCReq = fun () ->
+ RL = gc_req(Me, 100),
+ lists:foreach(fun (R) ->
+ receive
+ {garbage_collect, R, true} ->
+ ok
+ end
+ end, RL),
+ exit(it_worked)
+ end,
+ HTLs = lists:map(fun (_) -> spawn_monitor(GCReq) end, lists:seq(1, 1000)),
+ lists:foreach(fun ({P, M}) ->
+ receive
+ {'DOWN', M, process, P, it_worked} ->
+ ok
+ end
+ end, HTLs),
+ ok.
+
+gc_req(_Pid, 0) ->
+ [];
+gc_req(Pid, N) ->
+ R0 = request_gc(Pid, low),
+ R1 = request_gc(Pid, normal),
+ R2 = request_gc(Pid, high),
+ R3 = request_gc(Pid, max),
+ [R0, R1, R2, R3 | gc_req(Pid, N-1)].
+
+system_task_on_suspended(Config) when is_list(Config) ->
+ {P, M} = spawn_monitor(fun () ->
+ tok_loop()
+ end),
+ true = erlang:suspend_process(P),
+ {status, suspended} = process_info(P, status),
+ true = erlang:garbage_collect(P),
+ {status, suspended} = process_info(P, status),
+ true = erlang:resume_process(P),
+ false = ({status, suspended} == process_info(P, status)),
+ exit(P, kill),
+ receive
+ {'DOWN', M, process, P, killed} ->
+ ok
+ end.
+
+gc_req(_Pid, 0) ->
+ [];
+gc_req(Pid, N) ->
+ R0 = erts_internal:request_system_task(Pid, low, garbage_collect),
+ R1 = erts_internal:request_system_task(Pid, normal, garbage_collect),
+ R2 = erts_internal:request_system_task(Pid, high, garbage_collect),
+ R3 = erts_internal:request_system_task(Pid, max, garbage_collect),
+ [R0, R1, R2, R3 | gc_req(Pid, N-1)].
+
%% Internal functions
wait_until(Fun) ->
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-04 09:17:42 +0000