[PATCH v4 2/3] drm/sched: cleanup gpu_scheduler trace events

[Pierre-Eric Pelloux-Prayer]

Print identifiers instead of pointers:
* "fence=%p" is replaced by "fence=(context:%llu, seqno:%lld)" to have a
coherent way to print the fence. A possible follow up change would be
to use the same format in traces/../dma-fence.h.
* "entity=%p" is removed because the fence's context is already an
identifier of the job owner.

For drm_sched_job_wait_dep, we also print the hardware exec context of
the fence that's initiating the wait (the scheduled fence ctx is not
relevant here, since it's not traced in other events).

Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer at amd.com>
---
 .../gpu/drm/scheduler/gpu_scheduler_trace.h   | 40 +++++++++++--------
 1 file changed, 24 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/scheduler/gpu_scheduler_trace.h b/drivers/gpu/drm/scheduler/gpu_scheduler_trace.h
index 1f9c5a884487..6541e161962f 100644
--- a/drivers/gpu/drm/scheduler/gpu_scheduler_trace.h
+++ b/drivers/gpu/drm/scheduler/gpu_scheduler_trace.h
@@ -37,27 +37,30 @@ DECLARE_EVENT_CLASS(drm_sched_job,
 	    TP_ARGS(sched_job, entity),
 	    TP_STRUCT__entry(
 			     __field(struct drm_sched_entity *, entity)
-			     __field(struct dma_fence *, fence)
 			     __string(name, sched_job->sched->name)
 			     __field(uint64_t, id)
 			     __field(u32, job_count)
 			     __field(int, hw_job_count)
 			     __string(dev, dev_name(sched_job->sched->dev))
+			     __field(uint64_t, fence_context)
+			     __field(uint64_t, fence_seqno)
 			     ),
 
 	    TP_fast_assign(
 			   __entry->entity = entity;
 			   __entry->id = sched_job->id;
-			   __entry->fence = &sched_job->s_fence->finished;
 			   __assign_str(name);
 			   __entry->job_count = spsc_queue_count(&entity->job_queue);
 			   __entry->hw_job_count = atomic_read(
 				   &sched_job->sched->credit_count);
 			   __assign_str(dev);
+			   __entry->fence_context = sched_job->s_fence->finished.context;
+			   __entry->fence_seqno = sched_job->s_fence->finished.seqno;
+
 			   ),
-	    TP_printk("entity=%p, id=%llu, fence=%p, ring=%s, job count:%u, hw job count:%d",
-		      __entry->entity, __entry->id,
-		      __entry->fence, __get_str(name),
+	    TP_printk("id=%llu, fence=(context:%llu, seqno:%lld), ring=%s, job count:%u, hw job count:%d",
+		      __entry->id,
+		      __entry->fence_context, __entry->fence_seqno, __get_str(name),
 		      __entry->job_count, __entry->hw_job_count)
 );
 
@@ -69,9 +72,9 @@ DEFINE_EVENT(drm_sched_job, drm_sched_job,
 DEFINE_EVENT_PRINT(drm_sched_job, drm_run_job,
 	    TP_PROTO(struct drm_sched_job *sched_job, struct drm_sched_entity *entity),
 	    TP_ARGS(sched_job, entity),
-	    TP_printk("dev=%s, entity=%p id=%llu, fence=%p, ring=%s, job count:%u, hw job count:%d",
-		      __get_str(dev), __entry->entity, __entry->id,
-		      __entry->fence, __get_str(name),
+	    TP_printk("dev=%s, id=%llu, fence=(context:%llu, seqno:%lld), ring=%s, job count:%u, hw job count:%d",
+		      __get_str(dev), __entry->id,
+		      __entry->fence_context, __entry->fence_seqno, __get_str(name),
 		      __entry->job_count, __entry->hw_job_count)
 );
 
@@ -79,13 +82,16 @@ TRACE_EVENT(drm_sched_process_job,
 	    TP_PROTO(struct drm_sched_fence *fence),
 	    TP_ARGS(fence),
 	    TP_STRUCT__entry(
-		    __field(struct dma_fence *, fence)
+		    __field(uint64_t, fence_context)
+		    __field(uint64_t, fence_seqno)
 		    ),
 
 	    TP_fast_assign(
-		    __entry->fence = &fence->finished;
+		    __entry->fence_context = fence->finished.context;
+		    __entry->fence_seqno = fence->finished.seqno;
 		    ),
-	    TP_printk("fence=%p signaled", __entry->fence)
+	    TP_printk("fence=(context:%llu, seqno:%lld) signaled",
+		      __entry->fence_context, __entry->fence_seqno)
 );
 
 TRACE_EVENT(drm_sched_job_wait_dep,
@@ -93,23 +99,25 @@ TRACE_EVENT(drm_sched_job_wait_dep,
 	    TP_ARGS(sched_job, fence),
 	    TP_STRUCT__entry(
 			     __string(name, sched_job->sched->name)
+			     __field(uint64_t, fence_context)
 			     __field(uint64_t, id)
 			     __field(struct dma_fence *, fence)
 			     __field(uint64_t, ctx)
-			     __field(unsigned, seqno)
+			     __field(uint64_t, seqno)
 			     ),
 
 	    TP_fast_assign(
 			   __assign_str(name);
+			   /* Store the hw exec fence context. */
+			   __entry->fence_context = sched_job->entity->fence_context + 1;
 			   __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",
-		      __get_str(name), __entry->id,
-		      __entry->fence, __entry->ctx,
-		      __entry->seqno)
+	    TP_printk("job ring=%s, fence_context=%llu, id=%llu, depends fence=(context:%llu, seqno:%lld)",
+		      __get_str(name), __entry->fence_context, __entry->id,
+		      __entry->ctx, __entry->seqno)
 );
 
 #endif
-- 
2.40.1