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event: The reactor now contains a list of threads

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It iterates over the list and polls each one. However,
in practice the list still contains just one thread for
now.

Change-Id: I9bac7eb5ebf9b4edc6409caaf26747470b65e336
Signed-off-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-on: https://review.gerrithub.io/c/440763
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
This commit is contained in:
Ben Walker 2019-01-15 14:18:55 -07:00 committed by Jim Harris
parent 4e7bb83e78
commit 12759ab569
1 changed files with 41 additions and 8 deletions
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49
lib/event/reactor.c
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@ -53,10 +53,17 @@ enum spdk_reactor_state {
SPDK_REACTOR_STATE_SHUTDOWN = 4,
};
struct spdk_lw_thread {
TAILQ_ENTRY(spdk_lw_thread) link;
};
struct spdk_reactor {
/* Logical core number for this reactor. */
uint32_t lcore;
/* Lightweight threads running on this reactor */
TAILQ_HEAD(, spdk_lw_thread) threads;
/* Poller for get the rusage for the reactor. */
struct spdk_poller *rusage_poller;
@ -204,29 +211,47 @@ static int
_spdk_reactor_run(void *arg)
{
struct spdk_reactor *reactor = arg;
struct spdk_thread *thread;
struct spdk_thread *orig_thread, *thread;
uint64_t last_rusage = 0;
struct spdk_lw_thread *lw_thread, *tmp;
char thread_name[32];
snprintf(thread_name, sizeof(thread_name), "reactor_%u", reactor->lcore);
thread = spdk_thread_create(thread_name);
if (!thread) {
orig_thread = spdk_thread_create(thread_name);
if (!orig_thread) {
return -1;
}
lw_thread = (struct spdk_lw_thread *)spdk_thread_get_ctx(orig_thread);
if (!lw_thread) {
spdk_thread_exit(orig_thread);
return -ENOMEM;
}
TAILQ_INSERT_TAIL(&reactor->threads, lw_thread, link);
SPDK_NOTICELOG("Reactor started on core %u\n", reactor->lcore);
while (1) {
_spdk_event_queue_run_batch(reactor, thread);
uint64_t now;
spdk_thread_poll(thread, 0, 0);
/* For each loop through the reactor, capture the time. This time
* is used for all threads. */
now = spdk_get_ticks();
TAILQ_FOREACH_SAFE(lw_thread, &reactor->threads, link, tmp) {
thread = spdk_thread_get_from_ctx(lw_thread);
_spdk_event_queue_run_batch(reactor, thread);
spdk_thread_poll(thread, 0, now);
}
if (g_reactor_state != SPDK_REACTOR_STATE_RUNNING) {
break;
}
if (g_context_switch_monitor_enabled) {
uint64_t now = spdk_get_ticks();
if ((last_rusage + CONTEXT_SWITCH_MONITOR_PERIOD) < now) {
get_rusage(reactor);
last_rusage = now;
@ -234,6 +259,12 @@ _spdk_reactor_run(void *arg)
}
}
lw_thread = spdk_thread_get_ctx(orig_thread);
TAILQ_REMOVE(&reactor->threads, lw_thread, link);
assert(TAILQ_EMPTY(&reactor->threads));
spdk_thread_exit(orig_thread);
return 0;
}
@ -242,6 +273,8 @@ spdk_reactor_construct(struct spdk_reactor *reactor, uint32_t lcore)
{
reactor->lcore = lcore;
TAILQ_INIT(&reactor->threads);
reactor->events = spdk_ring_create(SPDK_RING_TYPE_MP_SC, 65536, SPDK_ENV_SOCKET_ID_ANY);
assert(reactor->events != NULL);
}
@ -343,7 +376,7 @@ spdk_reactors_init(void)
memset(g_reactors, 0, (last_core + 1) * sizeof(struct spdk_reactor));
spdk_thread_lib_init(NULL, 0);
spdk_thread_lib_init(NULL, sizeof(struct spdk_lw_thread));
SPDK_ENV_FOREACH_CORE(i) {
reactor = spdk_reactor_get(i);