[PATCH] drm/v3d: Expose performance counters to userspace

[Juan A. Suárez]

On Tue, 2021-06-08 at 13:15 +0200, Juan A. Suarez Romero wrote:
> The V3D engine has several hardware performance counters that can of
> interest for userspace performance analysis tools.
> 
> This exposes new ioctls to create and destroy performance monitor
> objects, as well as to query the counter values.
> 
> Each created performance monitor object has an ID that can be attached
> to CL/CSD submissions, so the driver enables the requested counters
> when
> the job is submitted, and updates the performance monitor values when
> the job is done.
> 
> It is up to the user to ensure all the jobs have been finished before
> getting the performance monitor values. It is also up to the user to
> properly synchronize BCL jobs when submitting jobs with different
> performance monitors attached.
> 
> Cc: Daniel Vetter <daniel at ffwll.ch>
> Cc: David Airlie <airlied at linux.ie>
> Cc: Emma Anholt <emma at anholt.net>
> To: dri-devel at lists.freedesktop.org
> Signed-off-by: Juan A. Suarez Romero <jasuarez at igalia.com>


Here is a link to Mesa MR that implements the support in the driver:
https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10666



	J.A.