tests/gem_wait_rendering_timeout: check polling behaviour

... with timeout=0. We have special code in the kernel to optimize
that one.

1 files changed, 11 insertions, 2 deletions

diff --git a/tests/gem_wait_render_timeout.c b/tests/gem_wait_render_timeout.c
index 0da5122e..e19b3c44 100644
--- a/tests/gem_wait_render_timeout.c
+++ b/tests/gem_wait_render_timeout.c
@@ -180,15 +180,18 @@ int main(int argc, char **argv)
 		exit(EXIT_FAILURE);
 	}
 	assert(gem_bo_busy(fd, dst2->handle) == false);
-
 	assert(timeout != 0);
-
 	if (timeout ==  (ENOUGH_WORK_IN_SECONDS * NSEC_PER_SEC))
 		printf("Buffer was already done!\n");
 	else {
 		printf("Finished with %lu time remaining\n", timeout);
 	}
 
+	/* check that polling with timeout=0 works. */
+	timeout = 0;
+	assert(gem_bo_wait_timeout(fd, dst2->handle, &timeout) == 0);
+	assert(timeout == 0);
+
 	/* Now check that we correctly time out, twice the auto-tune load should
 	 * be good enough. */
 	timeout = ENOUGH_WORK_IN_SECONDS * NSEC_PER_SEC;
@@ -202,6 +205,12 @@ int main(int argc, char **argv)
 	assert(timeout == 0);
 	assert(gem_bo_busy(fd, dst2->handle) == true);
 
+	/* check that polling with timeout=0 works. */
+	timeout = 0;
+	assert(gem_bo_wait_timeout(fd, dst2->handle, &timeout) == -ETIME);
+	assert(timeout == 0);
+
+
 	if (do_signals)
 		drmtest_stop_signal_helper();
 	drm_intel_bo_unreference(dst2);