Chiebot-Mirror
/
grpc
mirror of https://github.com/grpc/grpc.git
8
0
Fork 0
Code Issues Projects Releases Wiki Activity

Merge branch 'epex3' of github.com:ctiller/grpc into epex3

Browse Source
pull/10507/head
Craig Tiller 8 years ago
parent bb93af6b86 d9cd8f0abe
commit 4848028545
1 changed files with 63 additions and 26 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 89
      src/core/lib/iomgr/ev_epollex_linux.c

89
src/core/lib/iomgr/ev_epollex_linux.c
Unescape View File

@ -405,7 +405,10 @@ static void fd_notify_on_write(grpc_exec_ctx *exec_ctx, grpc_fd *fd,
grpc_lfev_notify_on(exec_ctx, &fd->write_closure, closure);
}
static grpc_workqueue *fd_get_workqueue(grpc_fd *fd) { REF_BY(fd, 2, "return_workqueue"); return (grpc_workqueue*)fd; }
static grpc_workqueue *fd_get_workqueue(grpc_fd *fd) {
REF_BY(fd, 2, "return_workqueue");
return (grpc_workqueue *)fd;
}
#ifdef GRPC_WORKQUEUE_REFCOUNT_DEBUG
static grpc_workqueue *workqueue_ref(grpc_workqueue *workqueue,
@ -581,7 +584,8 @@ static int poll_deadline_to_millis_timeout(gpr_timespec deadline,
return 0;
}
static const gpr_timespec round_up = {.clock_type = GPR_TIMESPAN, .tv_sec = 0, .tv_nsec = GPR_NS_PER_MS-1};
static const gpr_timespec round_up = {
.clock_type = GPR_TIMESPAN, .tv_sec = 0, .tv_nsec = GPR_NS_PER_MS - 1};
timeout = gpr_time_sub(deadline, now);
int millis = gpr_time_to_millis(gpr_time_add(timeout, round_up));
return millis >= 1 ? millis : 1;
@ -604,11 +608,20 @@ static void fd_become_writable(grpc_exec_ctx *exec_ctx, grpc_fd *fd) {
grpc_lfev_set_ready(exec_ctx, &fd->write_closure);
}
static void pollset_maybe_finish_shutdown(grpc_exec_ctx *exec_ctx,
grpc_pollset *pollset) {
if (pollset->shutdown_closure != NULL && pollset->num_pollers == 0 &&
pollset->po.pss_master == NULL) {
grpc_closure_sched(exec_ctx, pollset->shutdown_closure, GRPC_ERROR_NONE);
}
}
/* pollset->po.mu lock must be held by the caller before calling this */
static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
grpc_closure *closure) {
GPR_ASSERT(pollset->shutdown_closure == NULL);
pollset->shutdown_closure = closure;
gpr_atm_no_barrier_store(&pollset->shutdown_atm, 1);
if (pollset->num_pollers > 0) {
struct epoll_event ev = {.events = EPOLLIN,
.data.ptr = &pollset->pollset_wakeup};
@ -616,9 +629,16 @@ static void pollset_shutdown(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
&ev);
GRPC_LOG_IF_ERROR("pollset_shutdown",
grpc_wakeup_fd_wakeup(&pollset->pollset_wakeup));
} else {
grpc_closure_sched(exec_ctx, closure, GRPC_ERROR_NONE);
}
if (pollset->root_worker != NULL) {
for (grpc_pollset_worker *worker = pollset->root_worker->next;
worker != pollset->root_worker; worker = worker->next) {
if (worker->initialized_cv) {
gpr_cv_signal(&worker->cv);
}
}
}
pollset_maybe_finish_shutdown(exec_ctx, pollset);
}
/* pollset_shutdown is guaranteed to be called before pollset_destroy. */
@ -641,9 +661,8 @@ static grpc_error *pollset_poll(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
}
GRPC_SCHEDULING_START_BLOCKING_REGION;
int timeout=poll_deadline_to_millis_timeout(deadline, now);
int r = epoll_wait(pollset->epfd, events, MAX_EPOLL_EVENTS,
timeout);
int timeout = poll_deadline_to_millis_timeout(deadline, now);
int r = epoll_wait(pollset->epfd, events, MAX_EPOLL_EVENTS, timeout);
GRPC_SCHEDULING_END_BLOCKING_REGION;
if (r < 0) return GRPC_OS_ERROR(errno, "epoll_wait");
@ -723,6 +742,7 @@ static void end_worker(grpc_pollset *pollset, grpc_pollset_worker *worker,
pollset->root_worker = worker->next;
worker->prev->next = worker->next;
worker->next->prev = worker->prev;
gpr_cv_signal(&pollset->root_worker->cv);
}
} else {
worker->prev->next = worker->next;
@ -759,9 +779,7 @@ static grpc_error *pollset_work(grpc_exec_ctx *exec_ctx, grpc_pollset *pollset,
gpr_tls_set(&g_current_thread_pollset, 0);
gpr_tls_set(&g_current_thread_worker, 0);
pollset->num_pollers--;
if (pollset->num_pollers == 0 && pollset->shutdown_closure != NULL) {
grpc_closure_sched(exec_ctx, pollset->shutdown_closure, GRPC_ERROR_NONE);
}
pollset_maybe_finish_shutdown(exec_ctx, pollset);
}
end_worker(pollset, &worker, worker_hdl);
return error;
@ -818,8 +836,9 @@ static void pss_destroy(grpc_pollset_set *pss) {
GPR_ASSERT(pss->roots[PSS_FD] == NULL);
GPR_ASSERT(pss->roots[PSS_POLLSET] == NULL);
GPR_ASSERT(pss->roots[PSS_POLLSET_SET] == &pss->po);
for (pss_obj *child = pss->roots[PSS_POLLSET_SET]; child != &pss->po; child = child->pss_next) {
pss_unref((grpc_pollset_set*)child);
for (pss_obj *child = pss->roots[PSS_POLLSET_SET]; child != &pss->po;
child = child->pss_next) {
pss_unref((grpc_pollset_set *)child);
}
gpr_free(pss);
}
@ -947,7 +966,8 @@ static void pss_merge(grpc_exec_ctx *exec_ctx, grpc_pollset_set *a,
pss_merge_broadcast_and_patch(exec_ctx, a, b, PSS_FD);
pss_merge_broadcast_and_patch(exec_ctx, a, b, PSS_POLLSET);
b->po.pss_master = a;
a->roots[PSS_POLLSET_SET] = pss_splice(a->roots[PSS_POLLSET_SET], b->roots[PSS_POLLSET_SET]);
a->roots[PSS_POLLSET_SET] =
pss_splice(a->roots[PSS_POLLSET_SET], b->roots[PSS_POLLSET_SET]);
gpr_mu_unlock(&a->po.mu);
gpr_mu_unlock(&b->po.mu);
pss_unref(a);
@ -989,12 +1009,14 @@ static void pss_add_obj(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss,
obj->pss_prev->pss_next = obj;
obj->pss_next->pss_prev = obj;
}
gpr_mu_unlock(&obj->mu);
switch (type) {
case PSS_FD:
REF_BY((grpc_fd *)obj, 2, "pollset_set");
gpr_mu_unlock(&obj->mu);
pss_broadcast_fd(exec_ctx, pss, obj);
break;
case PSS_POLLSET:
gpr_mu_unlock(&obj->mu);
pss_broadcast_pollset(exec_ctx, pss, obj);
break;
case PSS_POLLSET_SET:
@ -1008,6 +1030,7 @@ static void pss_add_obj(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss,
static void pss_del_obj(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss,
pss_obj *obj, pss_obj_type type) {
bool unref = false;
pss = pss_ref_and_lock_master(pss);
gpr_mu_lock(&obj->mu);
obj->pss_refs--;
@ -1022,10 +1045,12 @@ static void pss_del_obj(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss,
obj->pss_next->pss_prev = obj->pss_prev;
obj->pss_prev->pss_next = obj->pss_next;
}
unref = true;
}
gpr_mu_unlock(&obj->mu);
gpr_mu_unlock(&pss->po.mu);
pss_unref(pss);
if (unref && type == PSS_FD) UNREF_BY((grpc_fd *)obj, 2, "pollset_set");
}
static void pollset_set_add_fd(grpc_exec_ctx *exec_ctx, grpc_pollset_set *pss,
@ -1108,12 +1133,17 @@ static const grpc_event_engine_vtable vtable = {
/* It is possible that GLIBC has epoll but the underlying kernel doesn't.
* Create a dummy epoll_fd to make sure epoll support is available */
static bool is_epollex_available(void) {
static bool logged_why_not = false;
int fd = epoll_create1(EPOLL_CLOEXEC);
if (fd < 0) {
gpr_log(GPR_ERROR,
"epoll_create1 failed with error: %d. Not using epollex polling "
"engine.",
fd);
if (!logged_why_not) {
gpr_log(GPR_ERROR,
"epoll_create1 failed with error: %d. Not using epollex polling "
"engine.",
fd);
logged_why_not = true;
}
return false;
}
grpc_wakeup_fd wakeup;
@ -1129,19 +1159,26 @@ static bool is_epollex_available(void) {
.data.ptr = NULL};
if (epoll_ctl(fd, EPOLL_CTL_ADD, wakeup.read_fd, &ev) != 0) {
if (errno != EINVAL) {
gpr_log(GPR_ERROR,
"epoll_ctl with EPOLLEXCLUSIVE | EPOLLONESHOT failed with error: "
"%d. Not using epollex polling engine.",
errno);
if (!logged_why_not) {
gpr_log(
GPR_ERROR,
"epoll_ctl with EPOLLEXCLUSIVE | EPOLLONESHOT failed with error: "
"%d. Not using epollex polling engine.",
errno);
logged_why_not = true;
}
close(fd);
grpc_wakeup_fd_destroy(&wakeup);
return false;
}
} else {
gpr_log(GPR_ERROR,
"epoll_ctl with EPOLLEXCLUSIVE | EPOLLONESHOT succeeded. This is "
"evidence of no EPOLLEXCLUSIVE support. Not using "
"epollex polling engine.");
if (!logged_why_not) {
gpr_log(GPR_ERROR,
"epoll_ctl with EPOLLEXCLUSIVE | EPOLLONESHOT succeeded. This is "
"evidence of no EPOLLEXCLUSIVE support. Not using "
"epollex polling engine.");
logged_why_not = true;
}
close(fd);
grpc_wakeup_fd_destroy(&wakeup);
return false;

Write Preview
Loading…
Cancel
Save