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drm/scheduler: Add job dependency trace.

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During debug sessions I encountered a need to trace
back a job dependecy a few steps back to the first failing
job. This trace helpped me a lot.

Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Andrey Grodzovsky 2018-07-31 10:48:52 -04:00 committed by Alex Deucher
parent df0ca30838
commit 07507c01aa
2 changed files with 30 additions and 2 deletions
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8
drivers/gpu/drm/scheduler/gpu_scheduler.c
View file

@ -522,9 +522,13 @@ drm_sched_entity_pop_job(struct drm_sched_entity *entity)
sched_job->sched = sched;
sched_job->s_fence->sched = sched;
while ((entity->dependency = sched->ops->dependency(sched_job, entity)))
if (drm_sched_entity_add_dependency_cb(entity))
while ((entity->dependency = sched->ops->dependency(sched_job, entity))) {
if (drm_sched_entity_add_dependency_cb(entity)) {
trace_drm_sched_job_wait_dep(sched_job, entity->dependency);
return NULL;
}
}
/* skip jobs from entity that marked guilty */
if (entity->guilty && atomic_read(entity->guilty))

24
drivers/gpu/drm/scheduler/gpu_scheduler_trace.h
View file

@ -74,6 +74,30 @@ TRACE_EVENT(drm_sched_process_job,
TP_printk("fence=%p signaled", __entry->fence)
);
TRACE_EVENT(drm_sched_job_wait_dep,
TP_PROTO(struct drm_sched_job *sched_job, struct dma_fence *fence),
TP_ARGS(sched_job, fence),
TP_STRUCT__entry(
__field(const char *,name)
__field(uint64_t, id)
__field(struct dma_fence *, fence)
__field(uint64_t, ctx)
__field(unsigned, seqno)
),
TP_fast_assign(
__entry->name = sched_job->sched->name;
__entry->id = sched_job->id;
__entry->fence = fence;
__entry->ctx = fence->context;
__entry->seqno = fence->seqno;
),
TP_printk("job ring=%s, id=%llu, depends fence=%p, context=%llu, seq=%u",
__entry->name, __entry->id,
__entry->fence, __entry->ctx,
__entry->seqno)
);
#endif
/* This part must be outside protection */