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drm/sched: Further optimise drm_sched_entity_push_job

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Having removed one re-lock cycle on the entity->lock in a patch titled
"drm/sched: Optimise drm_sched_entity_push_job", with only a tiny bit
larger refactoring we can do the same optimisation on the rq->lock.
(Currently both drm_sched_rq_add_entity() and
drm_sched_rq_update_fifo_locked() take and release the same lock.)

To achieve this we make drm_sched_rq_update_fifo_locked() and
drm_sched_rq_add_entity() expect the rq->lock to be held.

We also align drm_sched_rq_update_fifo_locked(),
drm_sched_rq_add_entity() and
drm_sched_rq_remove_fifo_locked() function signatures, by adding rq as a
parameter to the latter.

v2:
 * Fix after rebase of the series.
 * Avoid naming inconsistency between drm_sched_rq_add/remove. (Christian)

Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Cc: Christian König <christian.koenig@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Luben Tuikov <ltuikov89@gmail.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Cc: Philipp Stanner <pstanner@redhat.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Philipp Stanner <pstanner@redhat.com>
Signed-off-by: Philipp Stanner <pstanner@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241016122013.7857-6-tursulin@igalia.com
This commit is contained in:
Tvrtko Ursulin
2024-10-16 13:20:13 +01:00
committed by Philipp Stanner
parent f93126f5d5
commit 134e71bd1e
3 changed files with 25 additions and 18 deletions
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11
drivers/gpu/drm/scheduler/sched_entity.c
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@@ -515,9 +515,14 @@ struct drm_sched_job *drm_sched_entity_pop_job(struct drm_sched_entity *entity)
next = to_drm_sched_job(spsc_queue_peek(&entity->job_queue));
if (next) {
struct drm_sched_rq *rq;
spin_lock(&entity->lock);
drm_sched_rq_update_fifo_locked(entity,
rq = entity->rq;
spin_lock(&rq->lock);
drm_sched_rq_update_fifo_locked(entity, rq,
next->submit_ts);
spin_unlock(&rq->lock);
spin_unlock(&entity->lock);
}
}
@@ -616,11 +621,13 @@ void drm_sched_entity_push_job(struct drm_sched_job *sched_job)
rq = entity->rq;
sched = rq->sched;
spin_lock(&rq->lock);
drm_sched_rq_add_entity(rq, entity);
if (drm_sched_policy == DRM_SCHED_POLICY_FIFO)
drm_sched_rq_update_fifo_locked(entity, submit_ts);
drm_sched_rq_update_fifo_locked(entity, rq, submit_ts);
spin_unlock(&rq->lock);
spin_unlock(&entity->lock);
drm_sched_wakeup(sched);