[PATCH i-g-t] perf: Flush the work between rounds of gen8-unprivileged-single-ctx-counter

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Wait until the GPU is idle before starting a fresh round of probing
gen8-unprivileged-single-ctx-counter. This avoids building up a huge
backlog of render copies, hogging buffers and stale contexts, and
invoking the oomkiller.

Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Lionel Landwerlin <lionel.g.landwerlin@xxxxxxxxx>
---
 tests/perf.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tests/perf.c b/tests/perf.c
index 74fc8fd87..2d23a02c6 100644
--- a/tests/perf.c
+++ b/tests/perf.c
@@ -3787,6 +3787,7 @@ gen8_test_single_ctx_render_target_writes_a_counter(void)
 			drm_intel_gem_context_destroy(context1);
 			drm_intel_bufmgr_destroy(bufmgr);
 			__perf_close(stream_fd);
+			gem_quiescent_gpu(drm_fd);
 		}
 
 		child_ret = igt_wait_helper(&child);
-- 
2.26.2

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