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drm/scheduler: improve job distribution with multiple queues

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This patch uses score to select a new drm scheduler for better
loadbalance between multiple drm schedulers instead of num_jobs.

Below are test results after running amdgpu_test for ~10 times.

Before this patch:

sched_name     num of many times it got schedule
=========      ==================================
sdma0          1463
sdma1          198
comp_1.0.1     280

After this patch:

sched_name     num of many times it got schedule
=========      ==================================
sdma0          925
sdma1          928
comp_1.0.1     177
comp_1.1.1     44
comp_1.2.1     43
comp_1.3.1     44

Signed-off-by: Nirmoy Das <nirmoy.das@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Link: https://patchwork.freedesktop.org/patch/373000/
Signed-off-by: Christian König <christian.koenig@amd.com>
This commit is contained in:
Nirmoy Das
2020-06-25 14:07:23 +02:00
committed by Christian König
parent 0dc9b286b8
commit d41a39dda1
3 changed files with 12 additions and 10 deletions
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6
include/drm/gpu_scheduler.h
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@@ -263,7 +263,7 @@ struct drm_sched_backend_ops {
* @job_list_lock: lock to protect the ring_mirror_list.
* @hang_limit: once the hangs by a job crosses this limit then it is marked
* guilty and it will be considered for scheduling further.
* @num_jobs: the number of jobs in queue in the scheduler
* @score: score to help loadbalancer pick a idle sched
* @ready: marks if the underlying HW is ready to work
* @free_guilty: A hit to time out handler to free the guilty job.
*
@@ -284,8 +284,8 @@ struct drm_gpu_scheduler {
struct list_head ring_mirror_list;
spinlock_t job_list_lock;
int hang_limit;
atomic_t num_jobs;
bool ready;
atomic_t score;
bool ready;
bool free_guilty;
};