[PATCH libevl] tests: skip clock-timer-periodic on virtual targets

Even with the applied relaxation, the test still fails as soon as
stress is applied to the system. Skip the test on virtual targets
and tighten it again for all others.

Signed-off-by: Tobias Schaffner <[email protected]>
---
 tests/clock-timer-periodic.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/tests/clock-timer-periodic.c b/tests/clock-timer-periodic.c
index 2871a19..4c480c1 100644
--- a/tests/clock-timer-periodic.c
+++ b/tests/clock-timer-periodic.c
@@ -22,6 +22,15 @@ int main(int argc, char *argv[])
 	int tmfd, ret, n;
 	__u64 ticks;
 
+	/*
+	 * Skip on virtualized environments since the test relies on
+	 * timing guarantees that are not reliable under virtualization.
+	 */
+	if (running_on_vm()) {
+		emit_info("unchecked (vm)");
+		return EXIT_NO_STATUS;
+	}
+
 	param.sched_priority = 1;
 	__Texpr_assert(pthread_setschedparam(pthread_self(),
 				SCHED_FIFO, &param) == 0);
@@ -35,7 +44,7 @@ int main(int argc, char *argv[])
 	__Tcall_assert(ret, evl_read_clock(EVL_CLOCK_MONOTONIC, &now));
 	timespec_add_ns(&value.it_value, &now, 1000000000ULL);
 	value.it_interval.tv_sec = 0;
-	value.it_interval.tv_nsec = 10000000;
+	value.it_interval.tv_nsec = 5000000;
 	__Tcall_assert(ret, evl_set_timer(tmfd, &value, &ovalue));
 
 	for (n = 0; n < 200; n++) {
-- 
2.43.0