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-rw-r--r--erts/emulator/beam/erl_port.h3
-rw-r--r--erts/emulator/beam/erl_port_task.c28
-rw-r--r--erts/emulator/beam/erl_port_task.h2
-rw-r--r--erts/emulator/beam/erl_process.c2
-rw-r--r--erts/emulator/beam/erl_process.h1
-rw-r--r--erts/emulator/beam/io.c86
-rw-r--r--erts/emulator/test/busy_port_SUITE.erl2
7 files changed, 104 insertions, 20 deletions
diff --git a/erts/emulator/beam/erl_port.h b/erts/emulator/beam/erl_port.h
index 4095b88369..ad3f104a68 100644
--- a/erts/emulator/beam/erl_port.h
+++ b/erts/emulator/beam/erl_port.h
@@ -811,6 +811,7 @@ struct binary;
#define ERTS_P2P_SIG_DATA_FLG_BAD_OUTPUT ERTS_P2P_SIG_DATA_FLG(4)
#define ERTS_P2P_SIG_DATA_FLG_BROKEN_LINK ERTS_P2P_SIG_DATA_FLG(5)
#define ERTS_P2P_SIG_DATA_FLG_SCHED ERTS_P2P_SIG_DATA_FLG(6)
+#define ERTS_P2P_SIG_DATA_FLG_ASYNC ERTS_P2P_SIG_DATA_FLG(7)
struct ErtsProc2PortSigData_ {
int flags;
@@ -916,6 +917,7 @@ erts_schedule_proc2port_signal(Process *,
Eterm *,
ErtsProc2PortSigData *,
int,
+ ErtsPortTaskHandle *,
ErtsProc2PortSigCallback);
int erts_deliver_port_exit(Port *, Eterm, Eterm, int);
@@ -929,6 +931,7 @@ int erts_deliver_port_exit(Port *, Eterm, Eterm, int);
#define ERTS_PORT_SIG_FLG_BROKEN_LINK ERTS_P2P_SIG_DATA_FLG_BROKEN_LINK
#define ERTS_PORT_SIG_FLG_BAD_OUTPUT ERTS_P2P_SIG_DATA_FLG_BAD_OUTPUT
#define ERTS_PORT_SIG_FLG_FORCE_SCHED ERTS_P2P_SIG_DATA_FLG_SCHED
+#define ERTS_PORT_SIG_FLG_ASYNC ERTS_P2P_SIG_DATA_FLG_ASYNC
/* ERTS_PORT_SIG_FLG_FORCE_IMM_CALL only when crash dumping... */
#define ERTS_PORT_SIG_FLG_FORCE_IMM_CALL ERTS_P2P_SIG_DATA_FLG_BAD_OUTPUT
diff --git a/erts/emulator/beam/erl_port_task.c b/erts/emulator/beam/erl_port_task.c
index 0ed08bee01..53cb01a8c6 100644
--- a/erts/emulator/beam/erl_port_task.c
+++ b/erts/emulator/beam/erl_port_task.c
@@ -552,6 +552,19 @@ set_handle(ErtsPortTask *ptp, ErtsPortTaskHandle *pthp)
}
}
+static ERTS_INLINE void
+set_tmp_handle(ErtsPortTask *ptp, ErtsPortTaskHandle *pthp)
+{
+ ptp->u.alive.handle = NULL;
+ if (pthp) {
+ /*
+ * IMPORTANT! Task either need to be aborted, or task handle
+ * need to be detached before thread progress has been made.
+ */
+ erts_smp_atomic_set_relb(pthp, (erts_aint_t) ptp);
+ }
+}
+
/*
* Busy port queue management
@@ -1182,6 +1195,13 @@ erl_drv_consume_timeslice(ErlDrvPort dprt, int percent)
return 1;
}
+void
+erts_port_task_tmp_handle_detach(ErtsPortTaskHandle *pthp)
+{
+ ERTS_SMP_LC_ASSERT(erts_thr_progress_lc_is_delaying());
+ reset_port_task_handle(pthp);
+}
+
/*
* Abort a scheduled task.
*/
@@ -1206,7 +1226,7 @@ erts_port_task_abort(ErtsPortTaskHandle *pthp)
ERTS_SMP_READ_MEMORY_BARRIER;
old_state = erts_smp_atomic32_read_nob(&ptp->state);
if (old_state == ERTS_PT_STATE_SCHEDULED) {
- ASSERT(saved_pthp == pthp);
+ ASSERT(!saved_pthp || saved_pthp == pthp);
}
#endif
@@ -1227,9 +1247,6 @@ erts_port_task_abort(ErtsPortTaskHandle *pthp)
&erts_port_task_outstanding_io_tasks) > 0);
erts_smp_atomic_dec_relb(&erts_port_task_outstanding_io_tasks);
break;
- case ERTS_PORT_TASK_PROC_SIG:
- ERTS_INTERNAL_ERROR("Aborted process to port signal");
- break;
default:
break;
}
@@ -1404,7 +1421,6 @@ erts_port_task_schedule(Eterm id,
}
case ERTS_PORT_TASK_PROC_SIG: {
va_list argp;
- ASSERT(!pthp);
va_start(argp, type);
sigdp = va_arg(argp, ErtsProc2PortSigData *);
ptp = p2p_sig_data_to_task(sigdp);
@@ -1412,7 +1428,7 @@ erts_port_task_schedule(Eterm id,
ptp->u.alive.flags |= va_arg(argp, int);
va_end(argp);
if (!(ptp->u.alive.flags & ERTS_PT_FLG_NOSUSPEND))
- set_handle(ptp, pthp);
+ set_tmp_handle(ptp, pthp);
else {
ns_pthlp = erts_alloc(ERTS_ALC_T_PT_HNDL_LIST,
sizeof(ErtsPortTaskHandleList));
diff --git a/erts/emulator/beam/erl_port_task.h b/erts/emulator/beam/erl_port_task.h
index ae6cd69ae2..d35a15c27b 100644
--- a/erts/emulator/beam/erl_port_task.h
+++ b/erts/emulator/beam/erl_port_task.h
@@ -243,7 +243,9 @@ int erts_port_task_execute(ErtsRunQueue *, Port **);
void erts_port_task_init(void);
#endif
+void erts_port_task_tmp_handle_detach(ErtsPortTaskHandle *);
int erts_port_task_abort(ErtsPortTaskHandle *);
+
void erts_port_task_abort_nosuspend_tasks(Port *);
int erts_port_task_schedule(Eterm,
diff --git a/erts/emulator/beam/erl_process.c b/erts/emulator/beam/erl_process.c
index f9ef4eac65..d6061fb137 100644
--- a/erts/emulator/beam/erl_process.c
+++ b/erts/emulator/beam/erl_process.c
@@ -4670,6 +4670,8 @@ erts_init_scheduling(int no_schedulers, int no_schedulers_online)
esdp->reductions = 0;
init_sched_wall_time(&esdp->sched_wall_time);
+
+ erts_port_task_handle_init(&esdp->nosuspend_port_task_handle);
}
init_misc_aux_work();
diff --git a/erts/emulator/beam/erl_process.h b/erts/emulator/beam/erl_process.h
index 3d3579fa7e..232ab55e7f 100644
--- a/erts/emulator/beam/erl_process.h
+++ b/erts/emulator/beam/erl_process.h
@@ -507,6 +507,7 @@ struct ErtsSchedulerData_ {
Uint64 reductions;
ErtsSchedWallTime sched_wall_time;
+ ErtsPortTaskHandle nosuspend_port_task_handle;
#ifdef ERTS_DO_VERIFY_UNUSED_TEMP_ALLOC
erts_alloc_verify_func_t verify_unused_temp_alloc;
diff --git a/erts/emulator/beam/io.c b/erts/emulator/beam/io.c
index d32e7b5d21..dba78fc770 100644
--- a/erts/emulator/beam/io.c
+++ b/erts/emulator/beam/io.c
@@ -1441,6 +1441,7 @@ erts_schedule_proc2port_signal(Process *c_p,
Eterm *refp,
ErtsProc2PortSigData *sigdp,
int task_flags,
+ ErtsPortTaskHandle *pthp,
ErtsProc2PortSigCallback callback)
{
int sched_res;
@@ -1490,7 +1491,7 @@ erts_schedule_proc2port_signal(Process *c_p,
/* Schedule port close call for later execution... */
sched_res = erts_port_task_schedule(prt->common.id,
- NULL,
+ pthp,
ERTS_PORT_TASK_PROC_SIG,
sigdp,
callback,
@@ -1628,6 +1629,7 @@ bad_port_signal(Process *c_p,
refp,
sigdp,
0,
+ NULL,
port_badsig);
}
@@ -1837,8 +1839,11 @@ erts_port_output(Process *c_p,
ErlIOVec *evp = NULL;
char *buf = NULL;
int force_immediate_call = (flags & ERTS_PORT_SIG_FLG_FORCE_IMM_CALL);
+ int async_nosuspend;
+ ErtsPortTaskHandle *ns_pthp;
ASSERT((flags & ~(ERTS_PORT_SIG_FLG_BANG_OP
+ | ERTS_PORT_SIG_FLG_ASYNC
| ERTS_PORT_SIG_FLG_NOSUSPEND
| ERTS_PORT_SIG_FLG_FORCE
| ERTS_PORT_SIG_FLG_FORCE_IMM_CALL)) == 0);
@@ -1860,6 +1865,12 @@ erts_port_output(Process *c_p,
? ERTS_PORT_OP_DROPPED
: ERTS_PORT_OP_BUSY);
+ async_nosuspend = ((flags & (ERTS_PORT_SIG_FLG_ASYNC
+ | ERTS_PORT_SIG_FLG_NOSUSPEND
+ | ERTS_PORT_SIG_FLG_FORCE))
+ == (ERTS_PORT_SIG_FLG_ASYNC
+ | ERTS_PORT_SIG_FLG_NOSUSPEND));
+
try_call = (force_immediate_call /* crash dumping */
|| !(sched_flags & (invalid_flags
| ERTS_PTS_FLGS_FORCE_SCHEDULE_OP)));
@@ -1994,6 +2005,15 @@ erts_port_output(Process *c_p,
return ERTS_PORT_OP_DONE;
case ERTS_TRY_IMM_DRV_CALL_INVALID_SCHED_FLAGS:
sched_flags = try_call_state.sched_flags;
+ if (async_nosuspend
+ && (sched_flags & (busy_flgs|ERTS_PTS_FLG_EXIT))) {
+ driver_free_binary(cbin);
+ if (evp != &ev)
+ erts_free(ERTS_ALC_T_TMP, evp);
+ return ((sched_flags & ERTS_PTS_FLG_EXIT)
+ ? ERTS_PORT_OP_DROPPED
+ : ERTS_PORT_OP_BUSY);
+ }
case ERTS_TRY_IMM_DRV_CALL_BUSY_LOCK:
/* Schedule outputv() call instead... */
break;
@@ -2141,6 +2161,13 @@ erts_port_output(Process *c_p,
return ERTS_PORT_OP_DONE;
case ERTS_TRY_IMM_DRV_CALL_INVALID_SCHED_FLAGS:
sched_flags = try_call_state.sched_flags;
+ if (async_nosuspend
+ && (sched_flags & (busy_flgs|ERTS_PTS_FLG_EXIT))) {
+ erts_free(ERTS_ALC_T_TMP, buf);
+ return ((sched_flags & ERTS_PTS_FLG_EXIT)
+ ? ERTS_PORT_OP_DROPPED
+ : ERTS_PORT_OP_BUSY);
+ }
case ERTS_TRY_IMM_DRV_CALL_BUSY_LOCK:
/* Schedule outputv() call instead... */
break;
@@ -2162,20 +2189,33 @@ erts_port_output(Process *c_p,
task_flags = ERTS_PT_FLG_WAIT_BUSY;
sigdp->flags |= flags;
+ ns_pthp = NULL;
if (flags & (ERTS_P2P_SIG_DATA_FLG_FORCE|ERTS_P2P_SIG_DATA_FLG_NOSUSPEND)) {
task_flags = 0;
if (flags & ERTS_P2P_SIG_DATA_FLG_FORCE)
sigdp->flags &= ~ERTS_P2P_SIG_DATA_FLG_NOSUSPEND;
+ else if (async_nosuspend) {
+ ErtsSchedulerData *esdp = (c_p
+ ? ERTS_PROC_GET_SCHDATA(c_p)
+ : erts_get_scheduler_data());
+ ASSERT(esdp);
+ ns_pthp = &esdp->nosuspend_port_task_handle;
+ sigdp->flags &= ~ERTS_P2P_SIG_DATA_FLG_NOSUSPEND;
+ }
else if (flags & ERTS_P2P_SIG_DATA_FLG_NOSUSPEND)
task_flags = ERTS_PT_FLG_NOSUSPEND;
}
+ ASSERT(ns_pthp || !async_nosuspend);
+ ASSERT(async_nosuspend || !ns_pthp);
+
res = erts_schedule_proc2port_signal(c_p,
prt,
c_p ? c_p->common.id : ERTS_INVALID_PID,
refp,
sigdp,
task_flags,
+ ns_pthp,
port_sig_callback);
if (res != ERTS_PORT_OP_SCHEDULED) {
@@ -2186,9 +2226,23 @@ erts_port_output(Process *c_p,
return res;
}
- if (!(sched_flags & ERTS_PTS_FLG_EXIT) && (sched_flags & busy_flgs))
- return ERTS_PORT_OP_BUSY_SCHEDULED;
-
+ if (!(flags & ERTS_PORT_SIG_FLG_FORCE)) {
+ sched_flags = erts_smp_atomic32_read_acqb(&prt->sched.flags);
+ if (!(sched_flags & ERTS_PTS_FLG_BUSY_PORT)) {
+ if (async_nosuspend)
+ erts_port_task_tmp_handle_detach(ns_pthp);
+ }
+ else {
+ if (!async_nosuspend)
+ return ERTS_PORT_OP_BUSY_SCHEDULED;
+ else {
+ if (erts_port_task_abort(ns_pthp) == 0)
+ return ERTS_PORT_OP_BUSY;
+ else
+ erts_port_task_tmp_handle_detach(ns_pthp);
+ }
+ }
+ }
return res;
bad_value:
@@ -2284,6 +2338,7 @@ erts_port_exit(Process *c_p,
ErlHeapFragment *bp = NULL;
ASSERT((flags & ~(ERTS_PORT_SIG_FLG_BANG_OP
+ | ERTS_PORT_SIG_FLG_ASYNC
| ERTS_PORT_SIG_FLG_BROKEN_LINK
| ERTS_PORT_SIG_FLG_FORCE_SCHED)) == 0);
@@ -2344,6 +2399,7 @@ erts_port_exit(Process *c_p,
refp,
sigdp,
0,
+ NULL,
port_sig_exit);
if (res == ERTS_PORT_OP_DROPPED) {
@@ -2459,7 +2515,8 @@ erts_port_connect(Process *c_p,
!refp,
am_connect);
- ASSERT((flags & ~ERTS_PORT_SIG_FLG_BANG_OP) == 0);
+ ASSERT((flags & ~(ERTS_PORT_SIG_FLG_BANG_OP
+ | ERTS_PORT_SIG_FLG_ASYNC)) == 0);
if (is_not_internal_pid(connect))
connect_id = NIL; /* Fail in op (for signal order) */
@@ -2498,6 +2555,7 @@ erts_port_connect(Process *c_p,
refp,
sigdp,
0,
+ NULL,
port_sig_connect);
}
@@ -2554,6 +2612,7 @@ erts_port_unlink(Process *c_p, Port *prt, Eterm from, Eterm *refp)
refp,
sigdp,
0,
+ NULL,
port_sig_unlink);
}
@@ -2643,6 +2702,7 @@ erts_port_link(Process *c_p, Port *prt, Eterm to, Eterm *refp)
refp,
sigdp,
0,
+ NULL,
port_sig_link);
}
@@ -3621,6 +3681,10 @@ erts_port_command(Process *c_p,
ASSERT(port);
flags |= ERTS_PORT_SIG_FLG_BANG_OP;
+ if (!erts_port_synchronous_ops) {
+ flags |= ERTS_PORT_SIG_FLG_ASYNC;
+ refp = NULL;
+ }
if (is_tuple_arity(command, 2)) {
Eterm cntd;
@@ -3628,21 +3692,14 @@ erts_port_command(Process *c_p,
cntd = tp[1];
if (is_internal_pid(cntd)) {
if (tp[2] == am_close) {
- if (!erts_port_synchronous_ops)
- refp = NULL;
flags &= ~ERTS_PORT_SIG_FLG_NOSUSPEND;
return erts_port_exit(c_p, flags, port, cntd, am_normal, refp);
} else if (is_tuple_arity(tp[2], 2)) {
tp = tuple_val(tp[2]);
if (tp[1] == am_command) {
- if (!(flags & ERTS_PORT_SIG_FLG_NOSUSPEND)
- && !erts_port_synchronous_ops)
- refp = NULL;
return erts_port_output(c_p, flags, port, cntd, tp[2], refp);
}
else if (tp[1] == am_connect) {
- if (!erts_port_synchronous_ops)
- refp = NULL;
flags &= ~ERTS_PORT_SIG_FLG_NOSUSPEND;
return erts_port_connect(c_p, flags, port, cntd, tp[2], refp);
}
@@ -3651,8 +3708,6 @@ erts_port_command(Process *c_p,
}
/* badsig */
- if (!erts_port_synchronous_ops)
- refp = NULL;
flags &= ~ERTS_PORT_SIG_FLG_NOSUSPEND;
return bad_port_signal(c_p, flags, port, c_p->common.id, refp, am_command);
}
@@ -4049,6 +4104,7 @@ erts_port_control(Process* c_p,
retvalp,
sigdp,
0,
+ NULL,
port_sig_control);
if (res != ERTS_PORT_OP_SCHEDULED) {
cleanup_scheduled_control(binp, bufp);
@@ -4329,6 +4385,7 @@ erts_port_call(Process* c_p,
retvalp,
sigdp,
0,
+ NULL,
port_sig_call);
if (res != ERTS_PORT_OP_SCHEDULED) {
cleanup_scheduled_call(bufp);
@@ -4495,6 +4552,7 @@ erts_port_info(Process* c_p,
retvalp,
sigdp,
0,
+ NULL,
port_sig_info);
}
diff --git a/erts/emulator/test/busy_port_SUITE.erl b/erts/emulator/test/busy_port_SUITE.erl
index 2c63296b83..4b4af0babe 100644
--- a/erts/emulator/test/busy_port_SUITE.erl
+++ b/erts/emulator/test/busy_port_SUITE.erl
@@ -170,6 +170,7 @@ send_3(Config) when is_list(Config) ->
?line {Owner,Slave} = get_slave(),
?line ok = erlang:send(Slave, {Owner,{command,"set busy"}},
[nosuspend]),
+ receive after 100 -> ok end, % ensure command reached port
?line nosuspend = erlang:send(Slave, {Owner,{command,"busy"}},
[nosuspend]),
?line unlock_slave(),
@@ -563,6 +564,7 @@ scheduling_delay_busy_nosuspend(Config) ->
{2,{call,[{var,1},open_port]}},
{0,{cast,[{var,1},{command,1,100}]}},
{0,{cast,[{var,1},{busy,2}]}},
+ {0,{timer,sleep,[200]}}, % ensure reached port
{10,{call,[{var,1},{command,3,[nosuspend]}]}},
{0,{timer,sleep,[200]}},
{0,{erlang,port_command,[{var,2},<<$N>>,[force]]}},
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-01 18:33:44 +0000