[PATCH v5 3/7] drm/sched: Move schedule policy to scheduler
Luben Tuikov
luben.tuikov at amd.com
Sat Oct 14 01:40:24 UTC 2023
On 2023-10-11 19:58, Matthew Brost wrote:
> Rather than a global modparam for scheduling policy, move the scheduling
> policy to scheduler so user can control each scheduler policy.
>
> v2:
> - s/DRM_SCHED_POLICY_MAX/DRM_SCHED_POLICY_COUNT (Luben)
> - Only include policy in scheduler (Luben)
> v3:
> - use a ternary operator as opposed to an if-control (Luben)
> - s/DRM_SCHED_POLICY_DEFAULT/DRM_SCHED_POLICY_UNSET/ (Luben)
> - s/default_drm_sched_policy/drm_sched_policy_default/ (Luben)
> - Update commit message (Boris)
> - Fix v3d build (CI)
> - s/bad_policies/drm_sched_policy_mismatch/ (Luben)
> - Don't update modparam doc (Luben)
> v4:
> - Fix alignment in msm_ringbuffer_new (Luben / checkpatch)
>
> Reviewed-by: Luben Tuikov <luben.tuikov at amd.com>
> Signed-off-by: Matthew Brost <matthew.brost at intel.com>
Reviewed-by: Luben Tuikov <luben.tuikov at amd.com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 1 +
> drivers/gpu/drm/etnaviv/etnaviv_sched.c | 3 ++-
> drivers/gpu/drm/lima/lima_sched.c | 3 ++-
> drivers/gpu/drm/msm/msm_ringbuffer.c | 2 +-
> drivers/gpu/drm/nouveau/nouveau_sched.c | 3 ++-
> drivers/gpu/drm/panfrost/panfrost_job.c | 3 ++-
> drivers/gpu/drm/scheduler/sched_entity.c | 24 ++++++++++++++++++----
> drivers/gpu/drm/scheduler/sched_main.c | 19 ++++++++++++-----
> drivers/gpu/drm/v3d/v3d_sched.c | 15 +++++++++-----
> include/drm/gpu_scheduler.h | 20 ++++++++++++------
> 10 files changed, 68 insertions(+), 25 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> index b54c4d771104..e4e6f91450a4 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> @@ -2283,6 +2283,7 @@ static int amdgpu_device_init_schedulers(struct amdgpu_device *adev)
> ring->num_hw_submission, 0,
> timeout, adev->reset_domain->wq,
> ring->sched_score, ring->name,
> + DRM_SCHED_POLICY_UNSET,
> adev->dev);
> if (r) {
> DRM_ERROR("Failed to create scheduler on ring %s.\n",
> diff --git a/drivers/gpu/drm/etnaviv/etnaviv_sched.c b/drivers/gpu/drm/etnaviv/etnaviv_sched.c
> index 618a804ddc34..15b0e2f1abe5 100644
> --- a/drivers/gpu/drm/etnaviv/etnaviv_sched.c
> +++ b/drivers/gpu/drm/etnaviv/etnaviv_sched.c
> @@ -137,7 +137,8 @@ int etnaviv_sched_init(struct etnaviv_gpu *gpu)
> ret = drm_sched_init(&gpu->sched, &etnaviv_sched_ops, NULL,
> etnaviv_hw_jobs_limit, etnaviv_job_hang_limit,
> msecs_to_jiffies(500), NULL, NULL,
> - dev_name(gpu->dev), gpu->dev);
> + dev_name(gpu->dev), DRM_SCHED_POLICY_UNSET,
> + gpu->dev);
> if (ret)
> return ret;
>
> diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c
> index 8d858aed0e56..50c2075228aa 100644
> --- a/drivers/gpu/drm/lima/lima_sched.c
> +++ b/drivers/gpu/drm/lima/lima_sched.c
> @@ -491,7 +491,8 @@ int lima_sched_pipe_init(struct lima_sched_pipe *pipe, const char *name)
> return drm_sched_init(&pipe->base, &lima_sched_ops, NULL, 1,
> lima_job_hang_limit,
> msecs_to_jiffies(timeout), NULL,
> - NULL, name, pipe->ldev->dev);
> + NULL, name, DRM_SCHED_POLICY_UNSET,
> + pipe->ldev->dev);
> }
>
> void lima_sched_pipe_fini(struct lima_sched_pipe *pipe)
> diff --git a/drivers/gpu/drm/msm/msm_ringbuffer.c b/drivers/gpu/drm/msm/msm_ringbuffer.c
> index 1097f8e93d6b..173ad2f17c50 100644
> --- a/drivers/gpu/drm/msm/msm_ringbuffer.c
> +++ b/drivers/gpu/drm/msm/msm_ringbuffer.c
> @@ -97,7 +97,7 @@ struct msm_ringbuffer *msm_ringbuffer_new(struct msm_gpu *gpu, int id,
> ret = drm_sched_init(&ring->sched, &msm_sched_ops, NULL,
> num_hw_submissions, 0, sched_timeout,
> NULL, NULL, to_msm_bo(ring->bo)->name,
> - gpu->dev->dev);
> + DRM_SCHED_POLICY_UNSET, gpu->dev->dev);
> if (ret) {
> goto fail;
> }
> diff --git a/drivers/gpu/drm/nouveau/nouveau_sched.c b/drivers/gpu/drm/nouveau/nouveau_sched.c
> index 4c959dec42b3..c4e09d2e77f9 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_sched.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_sched.c
> @@ -437,7 +437,8 @@ int nouveau_sched_init(struct nouveau_drm *drm)
>
> return drm_sched_init(sched, &nouveau_sched_ops, NULL,
> NOUVEAU_SCHED_HW_SUBMISSIONS, 0, job_hang_limit,
> - NULL, NULL, "nouveau_sched", drm->dev->dev);
> + NULL, NULL, "nouveau_sched",
> + DRM_SCHED_POLICY_UNSET, drm->dev->dev);
> }
>
> void nouveau_sched_fini(struct nouveau_drm *drm)
> diff --git a/drivers/gpu/drm/panfrost/panfrost_job.c b/drivers/gpu/drm/panfrost/panfrost_job.c
> index 934b7b930c76..95330ff402ba 100644
> --- a/drivers/gpu/drm/panfrost/panfrost_job.c
> +++ b/drivers/gpu/drm/panfrost/panfrost_job.c
> @@ -856,7 +856,8 @@ int panfrost_job_init(struct panfrost_device *pfdev)
> nentries, 0,
> msecs_to_jiffies(JOB_TIMEOUT_MS),
> pfdev->reset.wq,
> - NULL, "pan_js", pfdev->dev);
> + NULL, "pan_js", DRM_SCHED_POLICY_UNSET,
> + pfdev->dev);
> if (ret) {
> dev_err(pfdev->dev, "Failed to create scheduler: %d.", ret);
> goto err_sched;
> diff --git a/drivers/gpu/drm/scheduler/sched_entity.c b/drivers/gpu/drm/scheduler/sched_entity.c
> index a42763e1429d..cf42e2265d64 100644
> --- a/drivers/gpu/drm/scheduler/sched_entity.c
> +++ b/drivers/gpu/drm/scheduler/sched_entity.c
> @@ -33,6 +33,20 @@
> #define to_drm_sched_job(sched_job) \
> container_of((sched_job), struct drm_sched_job, queue_node)
>
> +static bool drm_sched_policy_mismatch(struct drm_gpu_scheduler **sched_list,
> + unsigned int num_sched_list)
> +{
> + enum drm_sched_policy sched_policy = sched_list[0]->sched_policy;
> + unsigned int i;
> +
> + /* All schedule policies must match */
> + for (i = 1; i < num_sched_list; ++i)
> + if (sched_policy != sched_list[i]->sched_policy)
> + return true;
> +
> + return false;
> +}
> +
> /**
> * drm_sched_entity_init - Init a context entity used by scheduler when
> * submit to HW ring.
> @@ -62,7 +76,8 @@ int drm_sched_entity_init(struct drm_sched_entity *entity,
> unsigned int num_sched_list,
> atomic_t *guilty)
> {
> - if (!(entity && sched_list && (num_sched_list == 0 || sched_list[0])))
> + if (!(entity && sched_list && (num_sched_list == 0 || sched_list[0])) ||
> + drm_sched_policy_mismatch(sched_list, num_sched_list))
> return -EINVAL;
>
> memset(entity, 0, sizeof(struct drm_sched_entity));
> @@ -486,7 +501,7 @@ struct drm_sched_job *drm_sched_entity_pop_job(struct drm_sched_entity *entity)
> * Update the entity's location in the min heap according to
> * the timestamp of the next job, if any.
> */
> - if (drm_sched_policy == DRM_SCHED_POLICY_FIFO) {
> + if (entity->rq->sched->sched_policy == DRM_SCHED_POLICY_FIFO) {
> struct drm_sched_job *next;
>
> next = to_drm_sched_job(spsc_queue_peek(&entity->job_queue));
> @@ -558,7 +573,8 @@ void drm_sched_entity_select_rq(struct drm_sched_entity *entity)
> void drm_sched_entity_push_job(struct drm_sched_job *sched_job)
> {
> struct drm_sched_entity *entity = sched_job->entity;
> - bool first;
> + bool first, fifo = entity->rq->sched->sched_policy ==
> + DRM_SCHED_POLICY_FIFO;
> ktime_t submit_ts;
>
> trace_drm_sched_job(sched_job, entity);
> @@ -587,7 +603,7 @@ void drm_sched_entity_push_job(struct drm_sched_job *sched_job)
> drm_sched_rq_add_entity(entity->rq, entity);
> spin_unlock(&entity->rq_lock);
>
> - if (drm_sched_policy == DRM_SCHED_POLICY_FIFO)
> + if (fifo)
> drm_sched_rq_update_fifo(entity, submit_ts);
>
> drm_sched_wakeup_if_can_queue(entity->rq->sched);
> diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
> index 8b1d52cff1e9..150e5330f0fa 100644
> --- a/drivers/gpu/drm/scheduler/sched_main.c
> +++ b/drivers/gpu/drm/scheduler/sched_main.c
> @@ -66,14 +66,14 @@
> #define to_drm_sched_job(sched_job) \
> container_of((sched_job), struct drm_sched_job, queue_node)
>
> -int drm_sched_policy = DRM_SCHED_POLICY_FIFO;
> +int drm_sched_policy_default = DRM_SCHED_POLICY_FIFO;
>
> /**
> * DOC: sched_policy (int)
> * Used to override default entities scheduling policy in a run queue.
> */
> MODULE_PARM_DESC(sched_policy, "Specify the scheduling policy for entities on a run-queue, " __stringify(DRM_SCHED_POLICY_RR) " = Round Robin, " __stringify(DRM_SCHED_POLICY_FIFO) " = FIFO (default).");
> -module_param_named(sched_policy, drm_sched_policy, int, 0444);
> +module_param_named(sched_policy, drm_sched_policy_default, int, 0444);
>
> static __always_inline bool drm_sched_entity_compare_before(struct rb_node *a,
> const struct rb_node *b)
> @@ -177,7 +177,7 @@ void drm_sched_rq_remove_entity(struct drm_sched_rq *rq,
> if (rq->current_entity == entity)
> rq->current_entity = NULL;
>
> - if (drm_sched_policy == DRM_SCHED_POLICY_FIFO)
> + if (rq->sched->sched_policy == DRM_SCHED_POLICY_FIFO)
> drm_sched_rq_remove_fifo_locked(entity);
>
> spin_unlock(&rq->lock);
> @@ -898,7 +898,7 @@ drm_sched_select_entity(struct drm_gpu_scheduler *sched)
>
> /* Kernel run queue has higher priority than normal run queue*/
> for (i = DRM_SCHED_PRIORITY_COUNT - 1; i >= DRM_SCHED_PRIORITY_MIN; i--) {
> - entity = drm_sched_policy == DRM_SCHED_POLICY_FIFO ?
> + entity = sched->sched_policy == DRM_SCHED_POLICY_FIFO ?
> drm_sched_rq_select_entity_fifo(&sched->sched_rq[i]) :
> drm_sched_rq_select_entity_rr(&sched->sched_rq[i]);
> if (entity)
> @@ -1072,6 +1072,7 @@ static void drm_sched_main(struct work_struct *w)
> * used
> * @score: optional score atomic shared with other schedulers
> * @name: name used for debugging
> + * @sched_policy: schedule policy
> * @dev: target &struct device
> *
> * Return 0 on success, otherwise error code.
> @@ -1081,9 +1082,15 @@ int drm_sched_init(struct drm_gpu_scheduler *sched,
> struct workqueue_struct *submit_wq,
> unsigned hw_submission, unsigned hang_limit,
> long timeout, struct workqueue_struct *timeout_wq,
> - atomic_t *score, const char *name, struct device *dev)
> + atomic_t *score, const char *name,
> + enum drm_sched_policy sched_policy,
> + struct device *dev)
> {
> int i;
> +
> + if (sched_policy >= DRM_SCHED_POLICY_COUNT)
> + return -EINVAL;
> +
> sched->ops = ops;
> sched->hw_submission_limit = hw_submission;
> sched->name = name;
> @@ -1102,6 +1109,8 @@ int drm_sched_init(struct drm_gpu_scheduler *sched,
> sched->hang_limit = hang_limit;
> sched->score = score ? score : &sched->_score;
> sched->dev = dev;
> + sched->sched_policy = sched_policy == DRM_SCHED_POLICY_UNSET ?
> + drm_sched_policy_default : sched_policy;
> for (i = DRM_SCHED_PRIORITY_MIN; i < DRM_SCHED_PRIORITY_COUNT; i++)
> drm_sched_rq_init(sched, &sched->sched_rq[i]);
>
> diff --git a/drivers/gpu/drm/v3d/v3d_sched.c b/drivers/gpu/drm/v3d/v3d_sched.c
> index 38e092ea41e6..dec89c5b8cb1 100644
> --- a/drivers/gpu/drm/v3d/v3d_sched.c
> +++ b/drivers/gpu/drm/v3d/v3d_sched.c
> @@ -391,7 +391,8 @@ v3d_sched_init(struct v3d_dev *v3d)
> &v3d_bin_sched_ops, NULL,
> hw_jobs_limit, job_hang_limit,
> msecs_to_jiffies(hang_limit_ms), NULL,
> - NULL, "v3d_bin", v3d->drm.dev);
> + NULL, "v3d_bin", DRM_SCHED_POLICY_UNSET,
> + v3d->drm.dev);
> if (ret)
> return ret;
>
> @@ -399,7 +400,8 @@ v3d_sched_init(struct v3d_dev *v3d)
> &v3d_render_sched_ops, NULL,
> hw_jobs_limit, job_hang_limit,
> msecs_to_jiffies(hang_limit_ms), NULL,
> - NULL, "v3d_render", v3d->drm.dev);
> + NULL, "v3d_render", DRM_SCHED_POLICY_UNSET,
> + v3d->drm.dev);
> if (ret)
> goto fail;
>
> @@ -407,7 +409,8 @@ v3d_sched_init(struct v3d_dev *v3d)
> &v3d_tfu_sched_ops, NULL,
> hw_jobs_limit, job_hang_limit,
> msecs_to_jiffies(hang_limit_ms), NULL,
> - NULL, "v3d_tfu", v3d->drm.dev);
> + NULL, "v3d_tfu", DRM_SCHED_POLICY_UNSET,
> + v3d->drm.dev);
> if (ret)
> goto fail;
>
> @@ -416,7 +419,8 @@ v3d_sched_init(struct v3d_dev *v3d)
> &v3d_csd_sched_ops, NULL,
> hw_jobs_limit, job_hang_limit,
> msecs_to_jiffies(hang_limit_ms), NULL,
> - NULL, "v3d_csd", v3d->drm.dev);
> + NULL, "v3d_csd", DRM_SCHED_POLICY_UNSET,
> + v3d->drm.dev);
> if (ret)
> goto fail;
>
> @@ -424,7 +428,8 @@ v3d_sched_init(struct v3d_dev *v3d)
> &v3d_cache_clean_sched_ops, NULL,
> hw_jobs_limit, job_hang_limit,
> msecs_to_jiffies(hang_limit_ms), NULL,
> - NULL, "v3d_cache_clean", v3d->drm.dev);
> + NULL, "v3d_cache_clean",
> + DRM_SCHED_POLICY_UNSET, v3d->drm.dev);
> if (ret)
> goto fail;
> }
> diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
> index 211bd3cdabdc..320f0a720486 100644
> --- a/include/drm/gpu_scheduler.h
> +++ b/include/drm/gpu_scheduler.h
> @@ -72,11 +72,15 @@ enum drm_sched_priority {
> DRM_SCHED_PRIORITY_UNSET = -2
> };
>
> -/* Used to chose between FIFO and RR jobs scheduling */
> -extern int drm_sched_policy;
> -
> -#define DRM_SCHED_POLICY_RR 0
> -#define DRM_SCHED_POLICY_FIFO 1
> +/* Used to chose default scheduling policy*/
> +extern int default_drm_sched_policy;
> +
> +enum drm_sched_policy {
> + DRM_SCHED_POLICY_UNSET,
> + DRM_SCHED_POLICY_RR,
> + DRM_SCHED_POLICY_FIFO,
> + DRM_SCHED_POLICY_COUNT,
> +};
>
> /**
> * struct drm_sched_entity - A wrapper around a job queue (typically
> @@ -489,6 +493,7 @@ struct drm_sched_backend_ops {
> * guilty and it will no longer be considered for scheduling.
> * @score: score to help loadbalancer pick a idle sched
> * @_score: score used when the driver doesn't provide one
> + * @sched_policy: Schedule policy for scheduler
> * @ready: marks if the underlying HW is ready to work
> * @free_guilty: A hit to time out handler to free the guilty job.
> * @pause_submit: pause queuing of @work_submit on @submit_wq
> @@ -515,6 +520,7 @@ struct drm_gpu_scheduler {
> int hang_limit;
> atomic_t *score;
> atomic_t _score;
> + enum drm_sched_policy sched_policy;
> bool ready;
> bool free_guilty;
> bool pause_submit;
> @@ -527,7 +533,9 @@ int drm_sched_init(struct drm_gpu_scheduler *sched,
> struct workqueue_struct *submit_wq,
> uint32_t hw_submission, unsigned hang_limit,
> long timeout, struct workqueue_struct *timeout_wq,
> - atomic_t *score, const char *name, struct device *dev);
> + atomic_t *score, const char *name,
> + enum drm_sched_policy sched_policy,
> + struct device *dev);
>
> void drm_sched_fini(struct drm_gpu_scheduler *sched);
> int drm_sched_job_init(struct drm_sched_job *job,
--
Regards,
Luben
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