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

[Lionel Landwerlin]

On 29/04/2020 18:05, Chris Wilson wrote:
> 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.
>
> v2: Release everything before starting again.
>
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: Lionel Landwerlin <lionel.g.landwerlin at intel.com>

Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>


Thanks,


-Lionel


> ---
>   tests/perf.c | 21 +++++++++++----------
>   1 file changed, 11 insertions(+), 10 deletions(-)
>
> diff --git a/tests/perf.c b/tests/perf.c
> index 74fc8fd87..7bde46af8 100644
> --- a/tests/perf.c
> +++ b/tests/perf.c
> @@ -3762,19 +3762,9 @@ gen8_test_single_ctx_render_target_writes_a_counter(void)
>   			igt_assert_eq(ret, 0);
>   
>   			ret = memcmp(src[0].bo->virtual, dst[0].bo->virtual, 4 * width * height);
> -			if (ret != 0) {
> -				accumulator_print(&accumulator, "total");
> -				/* This needs to be investigated... From time
> -				 * to time, the work we kick off doesn't seem
> -				 * to happen. WTH?? */
> -				exit(EAGAIN);
> -			}
> -
>   			drm_intel_bo_unmap(src[0].bo);
>   			drm_intel_bo_unmap(dst[0].bo);
>   
> -			igt_assert_eq(accumulator.deltas[2 + 26], width * height);
> -
>   			for (int i = 0; i < ARRAY_SIZE(src); i++) {
>   				drm_intel_bo_unreference(src[i].bo);
>   				drm_intel_bo_unreference(dst[i].bo);
> @@ -3787,6 +3777,17 @@ 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);
> +
> +			if (ret != 0) {
> +				accumulator_print(&accumulator, "total");
> +				/* This needs to be investigated... From time
> +				 * to time, the work we kick off doesn't seem
> +				 * to happen. WTH?? */
> +				exit(EAGAIN);
> +			}
> +
> +			igt_assert_eq(accumulator.deltas[2 + 26], width * height);
>   		}
>   
>   		child_ret = igt_wait_helper(&child);