git/linux-net
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/ synced 2026-04-18 06:33:43 -04:00
Code Issues Packages Projects Releases Wiki Activity

drm/amdgpu: optimize scheduler fence handling

Browse Source 
We only need to wait for jobs to be scheduled when
the dependency is from the same scheduler.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Chunming Zhou <david1.zhou@amd.com>
This commit is contained in:
Christian König
2015-11-05 12:57:10 +01:00
committed by Alex Deucher
parent e98c1b0de6
commit 393a0bd437
3 changed files with 55 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
drivers/gpu/drm/amd/scheduler/gpu_scheduler.c
View File

@@ -211,6 +211,41 @@ static void amd_sched_entity_wakeup(struct fence *f, struct fence_cb *cb)
amd_sched_wakeup(entity->sched);
}
static bool amd_sched_entity_add_dependency_cb(struct amd_sched_entity *entity)
{
struct amd_gpu_scheduler *sched = entity->sched;
struct fence * fence = entity->dependency;
struct amd_sched_fence *s_fence;
if (fence->context == entity->fence_context) {
/* We can ignore fences from ourself */
fence_put(entity->dependency);
return false;
}
s_fence = to_amd_sched_fence(fence);
if (s_fence && s_fence->sched == sched) {
/* Fence is from the same scheduler */
if (test_bit(AMD_SCHED_FENCE_SCHEDULED_BIT, &fence->flags)) {
/* Ignore it when it is already scheduled */
fence_put(entity->dependency);
return false;
}
/* Wait for fence to be scheduled */
entity->cb.func = amd_sched_entity_wakeup;
list_add_tail(&entity->cb.node, &s_fence->scheduled_cb);
return true;
}
if (!fence_add_callback(entity->dependency, &entity->cb,
amd_sched_entity_wakeup))
return true;
fence_put(entity->dependency);
return false;
}
static struct amd_sched_job *
amd_sched_entity_pop_job(struct amd_sched_entity *entity)
{
@@ -223,20 +258,9 @@ amd_sched_entity_pop_job(struct amd_sched_entity *entity)
if (!kfifo_out_peek(&entity->job_queue, &sched_job, sizeof(sched_job)))
return NULL;
while ((entity->dependency = sched->ops->dependency(sched_job))) {
if (entity->dependency->context == entity->fence_context) {
/* We can ignore fences from ourself */
fence_put(entity->dependency);
continue;
}
if (fence_add_callback(entity->dependency, &entity->cb,
amd_sched_entity_wakeup))
fence_put(entity->dependency);
else
while ((entity->dependency = sched->ops->dependency(sched_job)))
if (amd_sched_entity_add_dependency_cb(entity))
return NULL;
}
return sched_job;
}
@@ -400,6 +424,7 @@ static int amd_sched_main(void *param)
atomic_inc(&sched->hw_rq_count);
fence = sched->ops->run_job(sched_job);
amd_sched_fence_scheduled(s_fence);
if (fence) {
r = fence_add_callback(fence, &s_fence->cb,
amd_sched_process_job);