Commit 76d97c87 authored by Pierre-Eric Pelloux-Prayer's avatar Pierre-Eric Pelloux-Prayer Committed by Philipp Stanner
Browse files

drm/sched: Trace dependencies for GPU jobs 



We can't trace dependencies from drm_sched_job_add_dependency
because when it's called the job's fence is not available yet.

So instead each dependency is traced individually when
drm_sched_entity_push_job is used.

Tracing the dependencies allows tools to analyze the dependencies
between the jobs (previously it was only possible for fences
traced by drm_sched_job_wait_dep).

Signed-off-by: default avatarPierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Reviewed-by: default avatarTvrtko Ursulin <tvrtko.ursulin@igalia.com>
Signed-off-by: default avatarPhilipp Stanner <phasta@kernel.org>
Link: https://lore.kernel.org/r/20250526125505.2360-6-pierre-eric.pelloux-prayer@amd.com
parent 8a98df70

drivers/gpu/drm/scheduler/gpu_scheduler_trace.h

+23 −0
Original line number Diff line number Diff line
@@ -87,6 +87,29 @@ TRACE_EVENT(drm_sched_process_job, 
		      __entry->fence_context, __entry->fence_seqno)

);



TRACE_EVENT(drm_sched_job_add_dep,

	TP_PROTO(struct drm_sched_job *sched_job, struct dma_fence *fence),

	TP_ARGS(sched_job, fence),

	TP_STRUCT__entry(

		    __field(u64, fence_context)

		    __field(u64, fence_seqno)

		    __field(u64, id)

		    __field(u64, ctx)

		    __field(u64, seqno)

		    ),



	TP_fast_assign(

		    __entry->fence_context = sched_job->s_fence->finished.context;

		    __entry->fence_seqno = sched_job->s_fence->finished.seqno;

		    __entry->id = sched_job->id;

		    __entry->ctx = fence->context;

		    __entry->seqno = fence->seqno;

		    ),

	TP_printk("fence=%llu:%llu, id=%llu depends on fence=%llu:%llu",

		  __entry->fence_context, __entry->fence_seqno, __entry->id,

		  __entry->ctx, __entry->seqno)

);



TRACE_EVENT(drm_sched_job_wait_dep,

	    TP_PROTO(struct drm_sched_job *sched_job, struct dma_fence *fence),

	    TP_ARGS(sched_job, fence),

drivers/gpu/drm/scheduler/sched_entity.c

+8 −0
Original line number Diff line number Diff line
@@ -586,6 +586,14 @@ void drm_sched_entity_push_job(struct drm_sched_job *sched_job) 
	ktime_t submit_ts;



	trace_drm_sched_job(sched_job, entity);



	if (trace_drm_sched_job_add_dep_enabled()) {

		struct dma_fence *entry;

		unsigned long index;



		xa_for_each(&sched_job->dependencies, index, entry)

			trace_drm_sched_job_add_dep(sched_job, entry);

	}

	atomic_inc(entity->rq->sched->score);

	WRITE_ONCE(entity->last_user, current->group_leader);