[igt-dev] [PATCH i-g-t v2] perf_pmu: Dump i915_runtime_pm_status

[Dixit, Ashutosh]

On Fri, 03 Mar 2023 07:49:41 -0800, Anshuman Gupta wrote:
>
> Dump i915_pm_runtime_status in case of i915 device failed to runtime
> suspend, it will dump the rpm wakeref tracking information which
> will useful to debug the runtime pm issues.
>
> v2:
> - Use wait_for_suspended(). [Ashutosh]
>
> Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
> Reviewed-by: Ashutosh Dixit <ashutosh.dixit at intel.com>
> ---
>  tests/i915/perf_pmu.c | 12 +++++++++++-
>  1 file changed, 11 insertions(+), 1 deletion(-)
>
> diff --git a/tests/i915/perf_pmu.c b/tests/i915/perf_pmu.c
> index c1779fc9d..df194c8ad 100644
> --- a/tests/i915/perf_pmu.c
> +++ b/tests/i915/perf_pmu.c
> @@ -1703,6 +1703,16 @@ static bool wait_for_rc6(int fd, int timeout)
>	return false;
>  }
>
> +static bool wait_for_suspended(int gem_fd)
> +{
> +	bool suspended = igt_wait_for_pm_status(IGT_RUNTIME_PM_STATUS_SUSPENDED);
> +
> +	if (!suspended)
> +		__igt_debugfs_dump(gem_fd, "i915_runtime_pm_status", IGT_LOG_INFO);
> +
> +	return suspended;
> +}
> +
>  static void
>  test_rc6(int gem_fd, unsigned int flags)
>  {
> @@ -1727,7 +1737,7 @@ test_rc6(int gem_fd, unsigned int flags)
>		drmModeFreeResources(res);
>
>		igt_require(igt_setup_runtime_pm(gem_fd));
> -		igt_require(igt_wait_for_pm_status(IGT_RUNTIME_PM_STATUS_SUSPENDED));
> +		igt_require(wait_for_suspended(gem_fd));

Hmm I didn't realize wait_for_suspended() instances were static so the
function will have to be duplicated. In any case the R-b stands. Thanks.

>
>		/*
>		 * Sleep for a bit to see if once woken up estimated RC6 hasn't
> --
> 2.25.1
>