[PATCH 1/2] drm/scheduler: Change scheduled fence track

[Christian König]

Hey Alex,

any objections that we merge those two patches through drm-misc-next?

Thanks,
Christian.

Am 26.04.21 um 08:27 schrieb Roy Sun:
> Update the timestamp of scheduled fence on HW
> completion of the previous fences
>
> This allow more accurate tracking of the fence
> execution in HW
>
> Signed-off-by: David M Nieto <david.nieto at amd.com>
> Signed-off-by: Roy Sun <Roy.Sun at amd.com>
> ---
>   drivers/gpu/drm/scheduler/sched_main.c | 12 ++++++++++--
>   1 file changed, 10 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
> index 92d8de24d0a1..f8e39ab0c41b 100644
> --- a/drivers/gpu/drm/scheduler/sched_main.c
> +++ b/drivers/gpu/drm/scheduler/sched_main.c
> @@ -515,7 +515,7 @@ void drm_sched_resubmit_jobs(struct drm_gpu_scheduler *sched)
>   EXPORT_SYMBOL(drm_sched_resubmit_jobs);
>   
>   /**
> - * drm_sched_resubmit_jobs_ext - helper to relunch certain number of jobs from mirror ring list
> + * drm_sched_resubmit_jobs_ext - helper to relaunch certain number of jobs from pending list
>    *
>    * @sched: scheduler instance
>    * @max: job numbers to relaunch
> @@ -671,7 +671,7 @@ drm_sched_select_entity(struct drm_gpu_scheduler *sched)
>   static struct drm_sched_job *
>   drm_sched_get_cleanup_job(struct drm_gpu_scheduler *sched)
>   {
> -	struct drm_sched_job *job;
> +	struct drm_sched_job *job, *next;
>   
>   	/*
>   	 * Don't destroy jobs while the timeout worker is running  OR thread
> @@ -690,6 +690,14 @@ drm_sched_get_cleanup_job(struct drm_gpu_scheduler *sched)
>   	if (job && dma_fence_is_signaled(&job->s_fence->finished)) {
>   		/* remove job from pending_list */
>   		list_del_init(&job->list);
> We just need to record the scheduled time of the next job. So we
> need not to check the rest job.
> +		/* account for the next fence in the queue */
> +		next = list_first_entry_or_null(&sched->pending_list,
> +				struct drm_sched_job, list);
> +		if (next && test_bit(DMA_FENCE_FLAG_TIMESTAMP_BIT,
> +			&job->s_fence->finished.flags)) {
> +			next->s_fence->scheduled.timestamp =
> +				job->s_fence->finished.timestamp;
> +		}
>   	} else {
>   		job = NULL;
>   		/* queue timeout for next job */