[01/12] drm/i915: Don't set queue-priority hint when supressing the reschedule
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Message ID 20200519063123.20673-1-chris@chris-wilson.co.uk
State New
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  • [01/12] drm/i915: Don't set queue-priority hint when supressing the reschedule
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Commit Message

Chris Wilson May 19, 2020, 6:31 a.m. UTC
We recorded the execlists->queue_priority_hint update for the inflight
request without kicking the tasklet. The next submitted request then
failed to be scheduled as it had a lower priority than the hint, leaving
the HW runnning with only the inflight request.

Fixes: 6cebcf746f3f ("drm/i915: Tweak scheduler's kick_submission()")
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
---
 drivers/gpu/drm/i915/i915_scheduler.c | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

Comments

Mika Kuoppala May 19, 2020, 1:38 p.m. UTC | #1
Chris Wilson <chris@chris-wilson.co.uk> writes:

s/supressing/suppressing

> We recorded the execlists->queue_priority_hint update for the inflight
> request without kicking the tasklet. The next submitted request then
> failed to be scheduled as it had a lower priority than the hint, leaving
> the HW runnning with only the inflight request.

s/nnn/nn

Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>

>
> Fixes: 6cebcf746f3f ("drm/i915: Tweak scheduler's kick_submission()")
> Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
> ---
>  drivers/gpu/drm/i915/i915_scheduler.c | 16 ++++++++--------
>  1 file changed, 8 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c
> index f4ea318781f0..cbb880b10c65 100644
> --- a/drivers/gpu/drm/i915/i915_scheduler.c
> +++ b/drivers/gpu/drm/i915/i915_scheduler.c
> @@ -209,14 +209,6 @@ static void kick_submission(struct intel_engine_cs *engine,
>  	if (!inflight)
>  		goto unlock;
>  
> -	ENGINE_TRACE(engine,
> -		     "bumping queue-priority-hint:%d for rq:%llx:%lld, inflight:%llx:%lld prio %d\n",
> -		     prio,
> -		     rq->fence.context, rq->fence.seqno,
> -		     inflight->fence.context, inflight->fence.seqno,
> -		     inflight->sched.attr.priority);
> -	engine->execlists.queue_priority_hint = prio;
> -
>  	/*
>  	 * If we are already the currently executing context, don't
>  	 * bother evaluating if we should preempt ourselves.
> @@ -224,6 +216,14 @@ static void kick_submission(struct intel_engine_cs *engine,
>  	if (inflight->context == rq->context)
>  		goto unlock;
>  
> +	ENGINE_TRACE(engine,
> +		     "bumping queue-priority-hint:%d for rq:%llx:%lld, inflight:%llx:%lld prio %d\n",
> +		     prio,
> +		     rq->fence.context, rq->fence.seqno,
> +		     inflight->fence.context, inflight->fence.seqno,
> +		     inflight->sched.attr.priority);
> +
> +	engine->execlists.queue_priority_hint = prio;
>  	if (need_preempt(prio, rq_prio(inflight)))
>  		tasklet_hi_schedule(&engine->execlists.tasklet);
>  
> -- 
> 2.20.1
>
> _______________________________________________
> Intel-gfx mailing list
> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx

Patch
diff mbox series

diff --git a/drivers/gpu/drm/i915/i915_scheduler.c b/drivers/gpu/drm/i915/i915_scheduler.c
index f4ea318781f0..cbb880b10c65 100644
--- a/drivers/gpu/drm/i915/i915_scheduler.c
+++ b/drivers/gpu/drm/i915/i915_scheduler.c
@@ -209,14 +209,6 @@  static void kick_submission(struct intel_engine_cs *engine,
 	if (!inflight)
 		goto unlock;
 
-	ENGINE_TRACE(engine,
-		     "bumping queue-priority-hint:%d for rq:%llx:%lld, inflight:%llx:%lld prio %d\n",
-		     prio,
-		     rq->fence.context, rq->fence.seqno,
-		     inflight->fence.context, inflight->fence.seqno,
-		     inflight->sched.attr.priority);
-	engine->execlists.queue_priority_hint = prio;
-
 	/*
 	 * If we are already the currently executing context, don't
 	 * bother evaluating if we should preempt ourselves.
@@ -224,6 +216,14 @@  static void kick_submission(struct intel_engine_cs *engine,
 	if (inflight->context == rq->context)
 		goto unlock;
 
+	ENGINE_TRACE(engine,
+		     "bumping queue-priority-hint:%d for rq:%llx:%lld, inflight:%llx:%lld prio %d\n",
+		     prio,
+		     rq->fence.context, rq->fence.seqno,
+		     inflight->fence.context, inflight->fence.seqno,
+		     inflight->sched.attr.priority);
+
+	engine->execlists.queue_priority_hint = prio;
 	if (need_preempt(prio, rq_prio(inflight)))
 		tasklet_hi_schedule(&engine->execlists.tasklet);