summaryrefslogtreecommitdiff
path: root/tools/perf/bench
diff options
context:
space:
mode:
authorDavidlohr Bueso <dave@stgolabs.net>2015-05-08 11:38:00 -0700
committerArnaldo Carvalho de Melo <acme@redhat.com>2015-05-08 16:24:02 -0300
commit598adc5c9c1cfd3f154f6d9df72b38eda63e306e (patch)
tree8ae8c800e928e875065ef452541a45e201da32c4 /tools/perf/bench
parentd65817b4e707068c2dd3e002e87c2a0294aabc2c (diff)
downloadlinux-598adc5c9c1cfd3f154f6d9df72b38eda63e306e.tar.gz
perf bench futex: Handle spurious wakeups
Wrap futex_wait around a loop and catch for EINTR. Either a spurious wakeup occurred or a signal interrupted is, either way we need to block again. Signed-off-by: Davidlohr Bueso <dbueso@suse.de> Cc: Davidlohr Bueso <dbueso@suse.de> Link: http://lkml.kernel.org/r/1431110280-20231-2-git-send-email-dave@stgolabs.net Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/bench')
-rw-r--r--tools/perf/bench/futex-wake.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/tools/perf/bench/futex-wake.c b/tools/perf/bench/futex-wake.c
index 929f762be47e..e5e41d3bdce7 100644
--- a/tools/perf/bench/futex-wake.c
+++ b/tools/perf/bench/futex-wake.c
@@ -60,7 +60,12 @@ static void *workerfn(void *arg __maybe_unused)
pthread_cond_wait(&thread_worker, &thread_lock);
pthread_mutex_unlock(&thread_lock);
- futex_wait(&futex1, 0, NULL, futex_flag);
+ while (1) {
+ if (futex_wait(&futex1, 0, NULL, futex_flag) != EINTR)
+ break;
+ }
+
+ pthread_exit(NULL);
return NULL;
}