[Intel-gfx] [PATCH i-g-t v5 04/11] tests/perf: rc6: try to guess when rc6 is disabled

[Ewelina Musial]

On Thu, Aug 31, 2017 at 11:35:08AM +0100, Lionel Landwerlin wrote:
> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
> ---
>  tests/perf.c | 13 +++++++++++++
>  1 file changed, 13 insertions(+)
> 
> diff --git a/tests/perf.c b/tests/perf.c
> index bd139bde..5fe0a332 100644
> --- a/tests/perf.c
> +++ b/tests/perf.c
> @@ -3463,6 +3463,17 @@ gen8_test_single_ctx_render_target_writes_a_counter(void)
>  	} while (WEXITSTATUS(child_ret) == EAGAIN);
>  }
>  
> +static bool
> +rc6_enabled(void)
> +{
> +	char *rc6_status = read_debugfs_record(drm_fd, "i915_drpc_info",
> +					       "RC6 Enabled");
> +	bool enabled = strcmp(rc6_status, "yes") == 0;
> +
> +	free(rc6_status);
> +	return enabled;
> +}

Could we do some helper with that functionality?
We are checking RC6 state in many places so maybe some global helper?
I am just wondering could be that useful :)

--
Ewelina

> +
>  static void
>  test_rc6_disable(void)
>  {
> @@ -3482,6 +3493,8 @@ test_rc6_disable(void)
>  	};
>  	uint64_t n_events_start, n_events_end;
>  
> +	igt_skip_on(!rc6_enabled());
> +
>  	stream_fd = __perf_open(drm_fd, &param);
>  
>  	n_events_start = read_debugfs_u64_record(drm_fd, "i915_drpc_info",
> -- 
> 2.14.1
> 
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