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-rw-r--r--erts/emulator/beam/erl_driver.h8
-rw-r--r--erts/emulator/beam/erl_drv_thread.c42
-rw-r--r--erts/emulator/beam/erl_init.c173
-rw-r--r--erts/emulator/beam/erl_port_task.c23
-rw-r--r--erts/emulator/drivers/common/inet_drv.c167
-rw-r--r--erts/emulator/test/scheduler_SUITE.erl64
6 files changed, 413 insertions, 64 deletions
diff --git a/erts/emulator/beam/erl_driver.h b/erts/emulator/beam/erl_driver.h
index 1ab6e17f56..b68fd46fcc 100644
--- a/erts/emulator/beam/erl_driver.h
+++ b/erts/emulator/beam/erl_driver.h
@@ -546,6 +546,11 @@ EXTERN int erl_drv_equal_tids(ErlDrvTid tid1, ErlDrvTid tid2);
EXTERN void erl_drv_thread_exit(void *resp);
EXTERN int erl_drv_thread_join(ErlDrvTid, void **respp);
+EXTERN char* erl_drv_mutex_name(ErlDrvMutex *mtx);
+EXTERN char* erl_drv_cond_name(ErlDrvCond *cnd);
+EXTERN char* erl_drv_rwlock_name(ErlDrvRWLock *rwlck);
+EXTERN char* erl_drv_thread_name(ErlDrvTid tid);
+
/*
* Misc.
*/
@@ -683,6 +688,3 @@ EXTERN int erl_drv_getenv(char *key, char *value, size_t *value_size);
/* also in global.h, but driver's can't include global.h */
void dtrace_drvport_str(ErlDrvPort port, char *port_buf);
-
-
-
diff --git a/erts/emulator/beam/erl_drv_thread.c b/erts/emulator/beam/erl_drv_thread.c
index a49a155701..4f1bba8657 100644
--- a/erts/emulator/beam/erl_drv_thread.c
+++ b/erts/emulator/beam/erl_drv_thread.c
@@ -188,6 +188,17 @@ erl_drv_mutex_destroy(ErlDrvMutex *dmtx)
#endif
}
+
+char *
+erl_drv_mutex_name(ErlDrvMutex *dmtx)
+{
+#ifdef USE_THREADS
+ return dmtx ? dmtx->name : NULL;
+#else
+ return NULL;
+#endif
+}
+
int
erl_drv_mutex_trylock(ErlDrvMutex *dmtx)
{
@@ -258,6 +269,15 @@ erl_drv_cond_destroy(ErlDrvCond *dcnd)
#endif
}
+char *
+erl_drv_cond_name(ErlDrvCond *dcnd)
+{
+#ifdef USE_THREADS
+ return dcnd ? dcnd->name : NULL;
+#else
+ return NULL;
+#endif
+}
void
erl_drv_cond_signal(ErlDrvCond *dcnd)
@@ -331,6 +351,16 @@ erl_drv_rwlock_destroy(ErlDrvRWLock *drwlck)
#endif
}
+char *
+erl_drv_rwlock_name(ErlDrvRWLock *drwlck)
+{
+#ifdef USE_THREADS
+ return drwlck ? drwlck->name : NULL;
+#else
+ return NULL;
+#endif
+}
+
int
erl_drv_rwlock_tryrlock(ErlDrvRWLock *drwlck)
{
@@ -617,6 +647,18 @@ erl_drv_thread_create(char *name,
#endif
}
+char *
+erl_drv_thread_name(ErlDrvTid tid)
+{
+#ifdef USE_THREADS
+ struct ErlDrvTid_ *dtid = (struct ErlDrvTid_ *) tid;
+ return dtid ? dtid->name : NULL;
+#else
+ return NULL;
+#endif
+}
+
+
ErlDrvTid
erl_drv_thread_self(void)
{
diff --git a/erts/emulator/beam/erl_init.c b/erts/emulator/beam/erl_init.c
index 8d137df7ae..8c4fffa75b 100644
--- a/erts/emulator/beam/erl_init.c
+++ b/erts/emulator/beam/erl_init.c
@@ -549,9 +549,12 @@ void erts_usage(void)
ERTS_SCHED_THREAD_MAX_STACK_SIZE);
erts_fprintf(stderr, "-spp Bool set port parallelism scheduling hint\n");
erts_fprintf(stderr, "-S n1:n2 set number of schedulers (n1), and number of\n");
- erts_fprintf(stderr, " schedulers online (n2), valid range for both\n");
- erts_fprintf(stderr, " numbers are [1-%d]\n",
+ erts_fprintf(stderr, " schedulers online (n2), maximum for both\n");
+ erts_fprintf(stderr, " numbers is %d\n",
ERTS_MAX_NO_OF_SCHEDULERS);
+ erts_fprintf(stderr, "-SP p1:p2 specify schedulers (p1) and schedulers online (p2)\n");
+ erts_fprintf(stderr, " as percentages of logical processors configured and logical\n");
+ erts_fprintf(stderr, " processors available, respectively\n");
erts_fprintf(stderr, "-t size set the maximum number of atoms the "
"emulator can handle\n");
erts_fprintf(stderr, " valid range is [%d-%d]\n",
@@ -631,6 +634,8 @@ early_init(int *argc, char **argv) /*
int ncpuavail;
int schdlrs;
int schdlrs_onln;
+ int schdlrs_percentage = 100;
+ int schdlrs_onln_percentage = 100;
int max_main_threads;
int max_reader_groups;
int reader_groups;
@@ -758,63 +763,132 @@ early_init(int *argc, char **argv) /*
}
break;
}
- case 'S' : {
- int tot, onln;
- char *arg = get_arg(argv[i]+2, argv[i+1], &i);
- switch (sscanf(arg, "%d:%d", &tot, &onln)) {
- case 0:
- switch (sscanf(arg, ":%d", &onln)) {
+ case 'S' :
+ if (argv[i][2] == 'P') {
+ int ptot, ponln;
+ char *arg = get_arg(argv[i]+3, argv[i+1], &i);
+ switch (sscanf(arg, "%d:%d", &ptot, &ponln)) {
+ case 0:
+ switch (sscanf(arg, ":%d", &ponln)) {
+ case 1:
+ if (ponln < 0)
+ goto bad_SP;
+ ptot = 100;
+ goto chk_SP;
+ default:
+ goto bad_SP;
+ }
case 1:
- tot = no_schedulers;
- goto chk_S;
+ if (ptot < 0)
+ goto bad_SP;
+ ponln = ptot < 100 ? ptot : 100;
+ goto chk_SP;
+ case 2:
+ if (ptot < 0 || ponln < 0)
+ goto bad_SP;
+ chk_SP:
+ schdlrs_percentage = ptot;
+ schdlrs_onln_percentage = ponln;
+ break;
default:
- goto bad_S;
- }
- case 1:
- onln = tot < schdlrs_onln ? tot : schdlrs_onln;
- case 2:
- chk_S:
- if (tot > 0)
- schdlrs = tot;
- else
- schdlrs = no_schedulers + tot;
- if (onln > 0)
- schdlrs_onln = onln;
- else
- schdlrs_onln = no_schedulers_online + onln;
- if (schdlrs < 1 || ERTS_MAX_NO_OF_SCHEDULERS < schdlrs) {
- erts_fprintf(stderr,
- "bad amount of schedulers %d\n",
- tot);
- erts_usage();
- }
- if (schdlrs_onln < 1 || schdlrs < schdlrs_onln) {
+ bad_SP:
+ erts_fprintf(stderr,
+ "bad schedulers percentage specifier %s\n",
+ arg);
+ erts_usage();
+ break;
+ }
+
+ VERBOSE(DEBUG_SYSTEM,
+ ("using %d:%d scheduler percentages\n",
+ schdlrs_percentage, schdlrs_onln_percentage));
+ } else {
+ int tot, onln;
+ char *arg = get_arg(argv[i]+2, argv[i+1], &i);
+ switch (sscanf(arg, "%d:%d", &tot, &onln)) {
+ case 0:
+ switch (sscanf(arg, ":%d", &onln)) {
+ case 1:
+ tot = no_schedulers;
+ goto chk_S;
+ default:
+ goto bad_S;
+ }
+ case 1:
+ onln = tot < schdlrs_onln ? tot : schdlrs_onln;
+ case 2:
+ chk_S:
+ if (tot > 0)
+ schdlrs = tot;
+ else
+ schdlrs = no_schedulers + tot;
+ if (onln > 0)
+ schdlrs_onln = onln;
+ else
+ schdlrs_onln = no_schedulers_online + onln;
+ if (schdlrs < 1 || ERTS_MAX_NO_OF_SCHEDULERS < schdlrs) {
+ erts_fprintf(stderr,
+ "bad amount of schedulers %d\n",
+ tot);
+ erts_usage();
+ }
+ if (schdlrs_onln < 1 || schdlrs < schdlrs_onln) {
+ erts_fprintf(stderr,
+ "bad amount of schedulers online %d "
+ "(total amount of schedulers %d)\n",
+ schdlrs_onln, schdlrs);
+ erts_usage();
+ }
+ break;
+ default:
+ bad_S:
erts_fprintf(stderr,
- "bad amount of schedulers online %d "
- "(total amount of schedulers %d)\n",
- schdlrs_onln, schdlrs);
+ "bad amount of schedulers %s\n",
+ arg);
erts_usage();
+ break;
}
- break;
- default:
- bad_S:
- erts_fprintf(stderr,
- "bad amount of schedulers %s\n",
- arg);
- erts_usage();
- break;
- }
- VERBOSE(DEBUG_SYSTEM,
- ("using %d:%d scheduler(s)\n", tot, onln));
- break;
- }
+ VERBOSE(DEBUG_SYSTEM,
+ ("using %d:%d scheduler(s)\n", tot, onln));
+ }
+ break;
default:
break;
}
}
i++;
}
+
+#ifdef ERTS_SMP
+ /* apply any scheduler percentages */
+ if (schdlrs_percentage != 100 || schdlrs_onln_percentage != 100) {
+ schdlrs = schdlrs * schdlrs_percentage / 100;
+ schdlrs_onln = schdlrs_onln * schdlrs_onln_percentage / 100;
+ if (schdlrs < 1)
+ schdlrs = 1;
+ if (ERTS_MAX_NO_OF_SCHEDULERS < schdlrs) {
+ erts_fprintf(stderr,
+ "bad schedulers percentage %d "
+ "(total amount of schedulers %d)\n",
+ schdlrs_percentage, schdlrs);
+ erts_usage();
+ }
+ if (schdlrs_onln < 1)
+ schdlrs_onln = 1;
+ if (schdlrs < schdlrs_onln) {
+ erts_fprintf(stderr,
+ "bad schedulers online percentage %d "
+ "(total amount of schedulers %d, online %d)\n",
+ schdlrs_onln_percentage, schdlrs, schdlrs_onln);
+ erts_usage();
+ }
+ }
+#else
+ /* Silence gcc warnings */
+ (void)schdlrs_percentage;
+ (void)schdlrs_onln_percentage;
+#endif
}
#ifndef USE_THREADS
@@ -1312,7 +1386,10 @@ erl_start(int argc, char **argv)
break;
case 'S' : /* Was handled in early_init() just read past it */
- (void) get_arg(argv[i]+2, argv[i+1], &i);
+ if (argv[i][2] == 'P')
+ (void) get_arg(argv[i]+3, argv[i+1], &i);
+ else
+ (void) get_arg(argv[i]+2, argv[i+1], &i);
break;
case 's' : {
diff --git a/erts/emulator/beam/erl_port_task.c b/erts/emulator/beam/erl_port_task.c
index 7d53ce7152..547a42beb2 100644
--- a/erts/emulator/beam/erl_port_task.c
+++ b/erts/emulator/beam/erl_port_task.c
@@ -1838,6 +1838,16 @@ release_port(void *vport)
{
erts_port_dec_refc((Port *) vport);
}
+
+static void
+schedule_release_port(void *vport) {
+ Port *pp = (Port*)vport;
+ /* This is only used when a port release was ordered from a non-scheduler */
+ erts_schedule_thr_prgr_later_op(release_port,
+ (void *) pp,
+ &pp->common.u.release);
+}
+
#endif
static void
@@ -2033,10 +2043,15 @@ begin_port_cleanup(Port *pp, ErtsPortTask **execqp, int *processing_busy_q_p)
* Schedule cleanup of port structure...
*/
#ifdef ERTS_SMP
- /* Has to be more or less immediate to release any driver */
- erts_schedule_thr_prgr_later_op(release_port,
- (void *) pp,
- &pp->common.u.release);
+ /* We might not be a scheduler, eg. traceing to port we are sys_msg_dispatcher */
+ if (!erts_get_scheduler_data()) {
+ erts_schedule_misc_aux_work(1, schedule_release_port, (void*)pp);
+ } else {
+ /* Has to be more or less immediate to release any driver */
+ erts_schedule_thr_prgr_later_op(release_port,
+ (void *) pp,
+ &pp->common.u.release);
+ }
#else
pp->cleanup = 1;
#endif
diff --git a/erts/emulator/drivers/common/inet_drv.c b/erts/emulator/drivers/common/inet_drv.c
index 301ce2d0e2..60db50e80a 100644
--- a/erts/emulator/drivers/common/inet_drv.c
+++ b/erts/emulator/drivers/common/inet_drv.c
@@ -282,7 +282,7 @@ static BOOL (WINAPI *fpSetHandleInformation)(HANDLE,DWORD,DWORD);
static unsigned long zero_value = 0;
static unsigned long one_value = 1;
-#else
+#else /* #ifdef __WIN32__ */
#include <sys/time.h>
#ifdef NETDB_H_NEEDS_IN_H
@@ -315,9 +315,17 @@ static unsigned long one_value = 1;
#include <net/if.h>
+#ifdef HAVE_SCHED_H
+#include <sched.h>
+#endif
+
+#ifdef HAVE_SETNS_H
+#include <setns.h>
+#endif
+
/* SCTP support -- currently for UNIX platforms only: */
#undef HAVE_SCTP
-#if (!defined(__WIN32__) && defined(HAVE_SCTP_H))
+#if defined(HAVE_SCTP_H)
#include <netinet/sctp.h>
@@ -418,7 +426,7 @@ static int (*p_sctp_bindx)(int sd, struct sockaddr *addrs,
static int (*p_sctp_peeloff)(int sd, sctp_assoc_t assoc_id) = NULL;
#endif
-#endif /* SCTP supported */
+#endif /* #if defined(HAVE_SCTP_H) */
#ifndef WANT_NONBLOCKING
#define WANT_NONBLOCKING
@@ -512,7 +520,7 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
} while(0)
-#endif /* __WIN32__ */
+#endif /* #ifdef __WIN32__ #else */
#ifdef HAVE_SOCKLEN_T
# define SOCKLEN_T socklen_t
@@ -680,6 +688,7 @@ static int my_strncasecmp(const char *s1, const char *s2, size_t n)
#define INET_LOPT_TCP_SEND_TIMEOUT_CLOSE 35 /* auto-close on send timeout or not */
#define INET_LOPT_MSGQ_HIWTRMRK 36 /* set local msgq high watermark */
#define INET_LOPT_MSGQ_LOWTRMRK 37 /* set local msgq low watermark */
+#define INET_LOPT_NETNS 38 /* Network namespace pathname */
/* SCTP options: a separate range, from 100: */
#define SCTP_OPT_RTOINFO 100
#define SCTP_OPT_ASSOCINFO 101
@@ -955,6 +964,10 @@ typedef struct {
int is_ignored; /* if a fd is ignored by the inet_drv.
This flag should be set to true when
the fd is used outside of inet_drv. */
+#ifdef HAVE_SETNS
+ char *netns; /* Socket network namespace name
+ as full file path */
+#endif
} inet_descriptor;
@@ -1181,6 +1194,7 @@ static ErlDrvTermData am_dontroute;
static ErlDrvTermData am_priority;
static ErlDrvTermData am_tos;
static ErlDrvTermData am_ipv6_v6only;
+static ErlDrvTermData am_netns;
#endif
/* speical errors for bad ports and sequences */
@@ -3498,6 +3512,7 @@ static void inet_init_sctp(void) {
INIT_ATOM(priority);
INIT_ATOM(tos);
INIT_ATOM(ipv6_v6only);
+ INIT_ATOM(netns);
/* Option names */
INIT_ATOM(sctp_rtoinfo);
@@ -3908,12 +3923,81 @@ static int erl_inet_close(inet_descriptor* desc)
static ErlDrvSSizeT inet_ctl_open(inet_descriptor* desc, int domain, int type,
char** rbuf, ErlDrvSizeT rsize)
{
+ int save_errno;
+#ifdef HAVE_SETNS
+ int current_ns, new_ns;
+ current_ns = new_ns = 0;
+#endif
+ save_errno = 0;
+
if (desc->state != INET_STATE_CLOSED)
return ctl_xerror(EXBADSEQ, rbuf, rsize);
+
+#ifdef HAVE_SETNS
+ if (desc->netns != NULL) {
+ /* Temporarily change network namespace for this thread
+ * while creating the socket
+ */
+ current_ns = open("/proc/self/ns/net", O_RDONLY);
+ if (current_ns == INVALID_SOCKET)
+ return ctl_error(sock_errno(), rbuf, rsize);
+ new_ns = open(desc->netns, O_RDONLY);
+ if (new_ns == INVALID_SOCKET) {
+ save_errno = sock_errno();
+ while (close(current_ns) == INVALID_SOCKET &&
+ sock_errno() == EINTR);
+ return ctl_error(save_errno, rbuf, rsize);
+ }
+ if (setns(new_ns, CLONE_NEWNET) != 0) {
+ save_errno = sock_errno();
+ while (close(new_ns) == INVALID_SOCKET &&
+ sock_errno() == EINTR);
+ while (close(current_ns) == INVALID_SOCKET &&
+ sock_errno() == EINTR);
+ return ctl_error(save_errno, rbuf, rsize);
+ }
+ else {
+ while (close(new_ns) == INVALID_SOCKET &&
+ sock_errno() == EINTR);
+ }
+ }
+#endif
if ((desc->s = sock_open(domain, type, desc->sprotocol)) == INVALID_SOCKET)
- return ctl_error(sock_errno(), rbuf, rsize);
- if ((desc->event = sock_create_event(desc)) == INVALID_EVENT)
- return ctl_error(sock_errno(), rbuf, rsize);
+ save_errno = sock_errno();
+#ifdef HAVE_SETNS
+ if (desc->netns != NULL) {
+ /* Restore network namespace */
+ if (setns(current_ns, CLONE_NEWNET) != 0) {
+ /* XXX Failed to restore network namespace.
+ * What to do? Tidy up and return an error...
+ * Note that the thread now might still be in the namespace.
+ * Can this even happen? Should the emulator be aborted?
+ */
+ if (desc->s != INVALID_SOCKET)
+ save_errno = sock_errno();
+ while (close(desc->s) == INVALID_SOCKET &&
+ sock_errno() == EINTR);
+ desc->s = INVALID_SOCKET;
+ while (close(current_ns) == INVALID_SOCKET &&
+ sock_errno() == EINTR);
+ return ctl_error(save_errno, rbuf, rsize);
+ }
+ else {
+ while (close(current_ns) == INVALID_SOCKET &&
+ sock_errno() == EINTR);
+ }
+ }
+#endif
+ if (desc->s == INVALID_SOCKET)
+ return ctl_error(save_errno, rbuf, rsize);
+
+ if ((desc->event = sock_create_event(desc)) == INVALID_EVENT) {
+ save_errno = sock_errno();
+ while (close(desc->s) == INVALID_SOCKET &&
+ sock_errno() == EINTR);
+ desc->s = INVALID_SOCKET;
+ return ctl_error(save_errno, rbuf, rsize);
+ }
SET_NONBLOCKING(desc->s);
#ifdef __WIN32__
driver_select(desc->port, desc->event, ERL_DRV_READ, 1);
@@ -5529,6 +5613,20 @@ static int inet_set_opts(inet_descriptor* desc, char* ptr, int len)
}
continue;
+#ifdef HAVE_SETNS
+ case INET_LOPT_NETNS:
+ /* It is annoying that ival and len are both (signed) int */
+ if (ival < 0) return -1;
+ if (len < ival) return -1;
+ if (desc->netns != NULL) FREE(desc->netns);
+ desc->netns = ALLOC(((unsigned int) ival) + 1);
+ memcpy(desc->netns, ptr, ival);
+ desc->netns[ival] = '\0';
+ ptr += ival;
+ len -= ival;
+ continue;
+#endif
+
case INET_OPT_REUSEADDR:
#ifdef __WIN32__
continue; /* Bjorn says */
@@ -5858,6 +5956,21 @@ static int sctp_set_opts(inet_descriptor* desc, char* ptr, int len)
res = 0;
continue;
+#ifdef HAVE_SETNS
+ case INET_LOPT_NETNS:
+ {
+ size_t ns_len;
+ ns_len = get_int32(curr); curr += 4;
+ CHKLEN(curr, ns_len);
+ if (desc->netns != NULL) FREE(desc->netns);
+ desc->netns = ALLOC(ns_len + 1);
+ memcpy(desc->netns, curr, ns_len);
+ desc->netns[ns_len] = '\0';
+ curr += ns_len;
+ }
+ continue;
+#endif
+
/* SCTP options and applicable generic INET options: */
case SCTP_OPT_RTOINFO:
@@ -6454,6 +6567,22 @@ static ErlDrvSSizeT inet_fill_opts(inet_descriptor* desc,
}
continue;
+#ifdef HAVE_SETNS
+ case INET_LOPT_NETNS:
+ if (desc->netns != NULL) {
+ size_t netns_len;
+ netns_len = strlen(desc->netns);
+ *ptr++ = opt;
+ put_int32(netns_len, ptr);
+ PLACE_FOR(netns_len, ptr);
+ memcpy(ptr, desc->netns, netns_len);
+ ptr += netns_len;
+ } else {
+ TRUNCATE_TO(0,ptr);
+ }
+ continue;
+#endif
+
case INET_OPT_PRIORITY:
#ifdef SO_PRIORITY
type = SO_PRIORITY;
@@ -6737,6 +6866,22 @@ static ErlDrvSSizeT sctp_fill_opts(inet_descriptor* desc,
break;
}
+#ifdef HAVE_SETNS
+ case INET_LOPT_NETNS:
+ if (desc->netns != NULL) {
+ PLACE_FOR
+ (spec, i,
+ LOAD_ATOM_CNT + LOAD_BUF2BINARY_CNT + LOAD_TUPLE_CNT);
+ i = LOAD_ATOM (spec, i, am_netns);
+ i = LOAD_BUF2BINARY
+ (spec, i, desc->netns, strlen(desc->netns));
+ i = LOAD_TUPLE (spec, i, 2);
+ break;
+ }
+ else
+ continue; /* Ignore */
+#endif
+
/* SCTP and generic INET options: */
case SCTP_OPT_RTOINFO:
@@ -7458,6 +7603,10 @@ static ErlDrvSSizeT inet_subscribe(inet_descriptor* desc,
static void inet_stop(inet_descriptor* desc)
{
erl_inet_close(desc);
+#ifdef HAVE_SETNS
+ if (desc->netns != NULL)
+ FREE(desc->netns);
+#endif
FREE(desc);
}
@@ -7537,6 +7686,10 @@ static ErlDrvData inet_start(ErlDrvPort port, int size, int protocol)
desc->is_ignored = 0;
+#ifdef HAVE_SETNS
+ desc->netns = NULL;
+#endif
+
return (ErlDrvData)desc;
}
diff --git a/erts/emulator/test/scheduler_SUITE.erl b/erts/emulator/test/scheduler_SUITE.erl
index 8931562828..81539faa09 100644
--- a/erts/emulator/test/scheduler_SUITE.erl
+++ b/erts/emulator/test/scheduler_SUITE.erl
@@ -52,6 +52,7 @@
update_cpu_info/1,
sct_cmd/1,
sbt_cmd/1,
+ scheduler_threads/1,
scheduler_suspend/1,
reader_groups/1]).
@@ -66,7 +67,7 @@ all() ->
equal_with_part_time_max,
equal_and_high_with_part_time_max, equal_with_high,
equal_with_high_max, bound_process,
- {group, scheduler_bind}, scheduler_suspend,
+ {group, scheduler_bind}, scheduler_threads, scheduler_suspend,
reader_groups].
groups() ->
@@ -1039,7 +1040,66 @@ sbt_test(Config, CpuTCmd, ClBt, Bt, LP) ->
tuple_to_list(SB)),
?line stop_node(Node),
?line ok.
-
+
+scheduler_threads(Config) when is_list(Config) ->
+ SmpSupport = erlang:system_info(smp_support),
+ {Sched, SchedOnln, _} = get_sstate(Config, ""),
+ %% Configure half the number of both the scheduler threads and
+ %% the scheduler threads online.
+ {HalfSched, HalfSchedOnln} = case SmpSupport of
+ false -> {1,1};
+ true ->
+ {Sched div 2,
+ SchedOnln div 2}
+ end,
+ {HalfSched, HalfSchedOnln, _} = get_sstate(Config, "+SP 50:50"),
+ %% Use +S to configure 4x the number of scheduler threads and
+ %% 4x the number of scheduler threads online, but alter that
+ %% setting using +SP to 50% scheduler threads and 25% scheduler
+ %% threads online. The result should be 2x scheduler threads and
+ %% 1x scheduler threads online.
+ TwiceSched = case SmpSupport of
+ false -> 1;
+ true -> Sched*2
+ end,
+ FourSched = integer_to_list(Sched*4),
+ FourSchedOnln = integer_to_list(SchedOnln*4),
+ CombinedCmd1 = "+S "++FourSched++":"++FourSchedOnln++" +SP50:25",
+ {TwiceSched, SchedOnln, _} = get_sstate(Config, CombinedCmd1),
+ %% Now do the same test but with the +S and +SP options in the
+ %% opposite order, since order shouldn't matter.
+ CombinedCmd2 = "+SP50:25 +S "++FourSched++":"++FourSchedOnln,
+ {TwiceSched, SchedOnln, _} = get_sstate(Config, CombinedCmd2),
+ %% Apply two +SP options to make sure the second overrides the first
+ TwoCmd = "+SP 25:25 +SP 100:100",
+ {Sched, SchedOnln, _} = get_sstate(Config, TwoCmd),
+ %% Configure 50% of scheduler threads online only
+ {Sched, HalfSchedOnln, _} = get_sstate(Config, "+SP:50"),
+ %% Configure 2x scheduler threads only
+ {TwiceSched, SchedOnln, _} = get_sstate(Config, "+SP 200"),
+ %% Test resetting the scheduler counts
+ ResetCmd = "+S "++FourSched++":"++FourSchedOnln++" +S 0:0",
+ {Sched, SchedOnln, _} = get_sstate(Config, ResetCmd),
+ %% Test negative +S settings, but only for SMP-enabled emulators
+ case SmpSupport of
+ false -> ok;
+ true ->
+ SchedMinus1 = Sched-1,
+ SchedOnlnMinus1 = SchedOnln-1,
+ {SchedMinus1, SchedOnlnMinus1, _} = get_sstate(Config, "+S -1"),
+ {Sched, SchedOnlnMinus1, _} = get_sstate(Config, "+S :-1"),
+ {SchedMinus1, SchedOnlnMinus1, _} = get_sstate(Config, "+S -1:-1")
+ end,
+ ok.
+
+get_sstate(Config, Cmd) ->
+ {ok, Node} = start_node(Config, Cmd),
+ [SState] = mcall(Node, [fun () ->
+ erlang:system_info(schedulers_state)
+ end]),
+ stop_node(Node),
+ SState.
+
scheduler_suspend(Config) when is_list(Config) ->
?line Dog = ?t:timetrap(?t:minutes(5)),
?line lists:foreach(fun (S) -> scheduler_suspend_test(Config, S) end,
generated by cgit v1.2.3 (git 2.25.1) at 2025-01-02 05:14:29 +0000