[Piglit] [PATCH v2] glx-oml-sync-control-timing: Make test behavior more stable

[Illia Iorin]

It is not mentioned what deviation is permissible in OML Spec.
This fail condition correction helps ignore unstable work
of the window manager. The old condition was left, but the test
result was changed from fail to warn, added fail condition.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89437
Cc: Michel Dänzer <michel.daenzer at amd.com>
Cc: Emil Velikov <emil.velikov at collabora.com>
Signed-off-by: Illia Iorin <illia.iorin at globallogic.com>
---
 tests/spec/glx_oml_sync_control/timing.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/tests/spec/glx_oml_sync_control/timing.c b/tests/spec/glx_oml_sync_control/timing.c
index ab7258940..6d810af52 100644
--- a/tests/spec/glx_oml_sync_control/timing.c
+++ b/tests/spec/glx_oml_sync_control/timing.c
@@ -332,7 +332,10 @@ draw(Display *dpy)
 				" does not match glXGetMscRateOML %fus\n",
 				msc_wallclock_duration_stats.mean,
 				expected_msc_wallclock_duration);
-			result = PIGLIT_FAIL;
+			piglit_merge_result(&result, PIGLIT_WARN);
+			if (fabs(expected_msc_wallclock_duration -
+			 	 msc_wallclock_duration_stats.mean) > 200)
+				result = PIGLIT_FAIL;
 		}
 	}
 
-- 
2.17.1