[igt-dev] [PATCH i-g-t] i915/perf_pmu: Idle before measuring idle

[Chris Wilson]

Before trying to measure the busyness reporting for the idle state, make
sure the gpu is actually idle and not still running any backgound system
task.

Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin at intel.com>
---
 tests/perf_pmu.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/perf_pmu.c b/tests/perf_pmu.c
index 1a08f564b..ef61c4d40 100644
--- a/tests/perf_pmu.c
+++ b/tests/perf_pmu.c
@@ -264,6 +264,7 @@ single(int gem_fd, const struct intel_execution_engine2 *e, unsigned int flags)
 	uint64_t val;
 	int fd;
 
+	gem_quiescent_gpu(gem_fd);
 	fd = open_pmu(I915_PMU_ENGINE_BUSY(e->class, e->instance));
 
 	if (flags & TEST_BUSY)
-- 
2.20.1