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authorNayan Deshmukh <nayan26deshmukh@gmail.com>2018-08-01 11:20:01 +0300
committerAlex Deucher <alexander.deucher@amd.com>2018-08-27 19:09:45 +0300
commit97ffa35b5dec4e68baa85e626b69ae4949a4ca2a (patch)
treea1224772b9f14934e31240212528ef1ab238604e /drivers/gpu/drm/scheduler
parent249a07c05a8da9637c2eb3205f1fc739c216f707 (diff)
downloadlinux-97ffa35b5dec4e68baa85e626b69ae4949a4ca2a.tar.xz
drm/scheduler: add new function to get least loaded sched v2
The function selects the run queue from the rq_list with the least load. The load is decided by the number of jobs in a scheduler. v2: avoid using atomic read twice consecutively, instead store it locally Signed-off-by: Nayan Deshmukh <nayan26deshmukh@gmail.com> Reviewed-by: Christian König <christian.koenig@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/scheduler')
-rw-r--r--drivers/gpu/drm/scheduler/gpu_scheduler.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/gpu/drm/scheduler/gpu_scheduler.c b/drivers/gpu/drm/scheduler/gpu_scheduler.c
index 3b9969190927..3e13bdfa8710 100644
--- a/drivers/gpu/drm/scheduler/gpu_scheduler.c
+++ b/drivers/gpu/drm/scheduler/gpu_scheduler.c
@@ -241,6 +241,31 @@ static bool drm_sched_entity_is_ready(struct drm_sched_entity *entity)
return true;
}
+/**
+ * drm_sched_entity_get_free_sched - Get the rq from rq_list with least load
+ *
+ * @entity: scheduler entity
+ *
+ * Return the pointer to the rq with least load.
+ */
+static struct drm_sched_rq *
+drm_sched_entity_get_free_sched(struct drm_sched_entity *entity)
+{
+ struct drm_sched_rq *rq = NULL;
+ unsigned int min_jobs = UINT_MAX, num_jobs;
+ int i;
+
+ for (i = 0; i < entity->num_rq_list; ++i) {
+ num_jobs = atomic_read(&entity->rq_list[i]->sched->num_jobs);
+ if (num_jobs < min_jobs) {
+ min_jobs = num_jobs;
+ rq = entity->rq_list[i];
+ }
+ }
+
+ return rq;
+}
+
static void drm_sched_entity_kill_jobs_cb(struct dma_fence *f,
struct dma_fence_cb *cb)
{