From: Yucong Sun <sunyucong@xxxxxxxxx>
This patch adds random delay on waiting for the signal to arrive,
making the test more robust.
Signed-off-by: Yucong Sun <sunyucong@xxxxxxxxx>
---
tools/testing/selftests/bpf/prog_tests/send_signal.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/send_signal.c b/tools/testing/selftests/bpf/prog_tests/send_signal.c
index 776916b61c40..6200256243f2 100644
--- a/tools/testing/selftests/bpf/prog_tests/send_signal.c
+++ b/tools/testing/selftests/bpf/prog_tests/send_signal.c
@@ -19,6 +19,7 @@ static void test_send_signal_common(struct perf_event_attr *attr,
int err = -1, pmu_fd = -1;
char buf[256];
pid_t pid;
+ int attempts = 100;
if (!ASSERT_OK(pipe(pipe_c2p), "pipe_c2p"))
return;
@@ -63,7 +64,10 @@ static void test_send_signal_common(struct perf_event_attr *attr,
ASSERT_EQ(read(pipe_p2c[0], buf, 1), 1, "pipe_read");
/* wait a little for signal handler */
- sleep(1);
+ while (attempts > 0 && !sigusr1_received) {
+ attempts--;
+ usleep(500 + rand() % 500);
+ }
buf[0] = sigusr1_received ? '2' : '0';
ASSERT_EQ(write(pipe_c2p[1], buf, 1), 1, "pipe_write");
--
2.30.2
