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

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Am 21.04.21 um 05:46 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@xxxxxxx>
Signed-off-by: Roy Sun <Roy.Sun@xxxxxxx>

Reviewed-by: Christian König <christian.koenig@xxxxxxx> for the series.

---
  drivers/gpu/drm/scheduler/sched_main.c | 11 +++++++++--
  1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
index 92d8de24d0a1..dc05a20a8ef2 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 +690,13 @@ 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);
+		/* account for the next fence in the queue */
+		next = list_first_entry_or_null(&sched->pending_list,
+				struct drm_sched_job, list);
+		if (next) {
+			next->s_fence->scheduled.timestamp =
+				job->s_fence->finished.timestamp;
+		}
  	} else {
  		job = NULL;
  		/* queue timeout for next job */

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