If the hardware queue for a scheduler is empty then we don't
need to the shift the entities from their current scheduler
as they are not getting scheduled because of some dependency.
Signed-off-by: Nayan Deshmukh <nayan26deshm...@gmail.com>
---
drivers/gpu/drm/scheduler/sched_entity.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/drivers/gpu/drm/scheduler/sched_entity.c
b/drivers/gpu/drm/scheduler/sched_entity.c
index 3e22a54a99c2..4d18497d6ecf 100644
--- a/drivers/gpu/drm/scheduler/sched_entity.c
+++ b/drivers/gpu/drm/scheduler/sched_entity.c
@@ -130,6 +130,12 @@ drm_sched_entity_get_free_sched(struct drm_sched_entity
*entity)
int i;
for (i = 0; i < entity->num_rq_list; ++i) {
+ if (atomic_read(&entity->rq_list[i]->sched->hw_rq_count) <
+ entity->rq_list[i]->sched->hw_submission_limit) {
+ rq = entity->rq_list[i];
+ break;
+ }
+
num_jobs = atomic_read(&entity->rq_list[i]->sched->num_jobs);
if (num_jobs < min_jobs) {
min_jobs = num_jobs;
@@ -470,6 +476,14 @@ void drm_sched_entity_select_rq(struct drm_sched_entity
*entity)
if (spsc_queue_count(&entity->job_queue) || entity->num_rq_list <= 1)
return;
+ /*
+ * We don't need to shift entity if the hardware
+ * queue of current scheduler is empty
+ */
+ if (atomic_read(&entity->rq->sched->hw_rq_count) <
+ entity->rq->sched->hw_submission_limit)
+ return;
+
fence = READ_ONCE(entity->last_scheduled);
if (fence && !dma_fence_is_signaled(fence))
return;
--
2.14.3
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