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Message-ID: <b23bb5ea-3e19-4e70-89c2-0bee658cac72@amd.com>
Date: Thu, 20 Mar 2025 11:09:57 +0100
From: Christian König <christian.koenig@....com>
To: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>,
Alex Deucher <alexander.deucher@....com>, David Airlie <airlied@...il.com>,
Simona Vetter <simona@...ll.ch>, Matthew Brost <matthew.brost@...el.com>,
Danilo Krummrich <dakr@...nel.org>, Philipp Stanner <phasta@...nel.org>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>
Cc: Tvrtko Ursulin <tursulin@...lia.com>,
Christian König <ckoenig.leichtzumerken@...il.com>,
amd-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH v8 09/10] drm: get rid of drm_sched_job::id
Am 20.03.25 um 10:58 schrieb Pierre-Eric Pelloux-Prayer:
> Its only purpose was for trace events, but jobs can already be
> uniquely identified using their fence.
>
> The downside of using the fence is that it's only available
> after 'drm_sched_job_arm' was called which is true for all trace
> events that used job.id so they can safely switch to using it.
>
> Suggested-by: Tvrtko Ursulin <tursulin@...lia.com>
> Signed-off-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@....com>
Reviewed-by: Christian König <christian.koenig@....com>
> ---
> drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h | 18 ++++++------------
> .../gpu/drm/scheduler/gpu_scheduler_trace.h | 18 ++++++------------
> drivers/gpu/drm/scheduler/sched_main.c | 1 -
> include/drm/gpu_scheduler.h | 3 ---
> 4 files changed, 12 insertions(+), 28 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h
> index 383fce40d4dd..a4f394d827bc 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_trace.h
> @@ -167,7 +167,6 @@ TRACE_EVENT(amdgpu_cs_ioctl,
> TP_PROTO(struct amdgpu_job *job),
> TP_ARGS(job),
> TP_STRUCT__entry(
> - __field(uint64_t, sched_job_id)
> __string(timeline, AMDGPU_JOB_GET_TIMELINE_NAME(job))
> __field(unsigned int, context)
> __field(unsigned int, seqno)
> @@ -177,15 +176,14 @@ TRACE_EVENT(amdgpu_cs_ioctl,
> ),
>
> TP_fast_assign(
> - __entry->sched_job_id = job->base.id;
> __assign_str(timeline);
> __entry->context = job->base.s_fence->finished.context;
> __entry->seqno = job->base.s_fence->finished.seqno;
> __assign_str(ring);
> __entry->num_ibs = job->num_ibs;
> ),
> - TP_printk("sched_job=%llu, timeline=%s, context=%u, seqno=%u, ring_name=%s, num_ibs=%u",
> - __entry->sched_job_id, __get_str(timeline), __entry->context,
> + TP_printk("timeline=%s, context=%u, seqno=%u, ring_name=%s, num_ibs=%u",
> + __get_str(timeline), __entry->context,
> __entry->seqno, __get_str(ring), __entry->num_ibs)
> );
>
> @@ -193,7 +191,6 @@ TRACE_EVENT(amdgpu_sched_run_job,
> TP_PROTO(struct amdgpu_job *job),
> TP_ARGS(job),
> TP_STRUCT__entry(
> - __field(uint64_t, sched_job_id)
> __string(timeline, AMDGPU_JOB_GET_TIMELINE_NAME(job))
> __field(unsigned int, context)
> __field(unsigned int, seqno)
> @@ -202,15 +199,14 @@ TRACE_EVENT(amdgpu_sched_run_job,
> ),
>
> TP_fast_assign(
> - __entry->sched_job_id = job->base.id;
> __assign_str(timeline);
> __entry->context = job->base.s_fence->finished.context;
> __entry->seqno = job->base.s_fence->finished.seqno;
> __assign_str(ring);
> __entry->num_ibs = job->num_ibs;
> ),
> - TP_printk("sched_job=%llu, timeline=%s, context=%u, seqno=%u, ring_name=%s, num_ibs=%u",
> - __entry->sched_job_id, __get_str(timeline), __entry->context,
> + TP_printk("timeline=%s, context=%u, seqno=%u, ring_name=%s, num_ibs=%u",
> + __get_str(timeline), __entry->context,
> __entry->seqno, __get_str(ring), __entry->num_ibs)
> );
>
> @@ -519,7 +515,6 @@ TRACE_EVENT(amdgpu_ib_pipe_sync,
> TP_ARGS(sched_job, fence),
> TP_STRUCT__entry(
> __string(ring, sched_job->base.sched->name)
> - __field(uint64_t, id)
> __field(struct dma_fence *, fence)
> __field(uint64_t, ctx)
> __field(unsigned, seqno)
> @@ -527,13 +522,12 @@ TRACE_EVENT(amdgpu_ib_pipe_sync,
>
> TP_fast_assign(
> __assign_str(ring);
> - __entry->id = sched_job->base.id;
> __entry->fence = fence;
> __entry->ctx = fence->context;
> __entry->seqno = fence->seqno;
> ),
> - TP_printk("job ring=%s, id=%llu, need pipe sync to fence=%p, context=%llu, seq=%u",
> - __get_str(ring), __entry->id,
> + TP_printk("job ring=%s need pipe sync to fence=%p, context=%llu, seq=%u",
> + __get_str(ring),
> __entry->fence, __entry->ctx,
> __entry->seqno)
> );
> diff --git a/drivers/gpu/drm/scheduler/gpu_scheduler_trace.h b/drivers/gpu/drm/scheduler/gpu_scheduler_trace.h
> index 3c7f6a39cf91..ad03240b2f03 100644
> --- a/drivers/gpu/drm/scheduler/gpu_scheduler_trace.h
> +++ b/drivers/gpu/drm/scheduler/gpu_scheduler_trace.h
> @@ -58,7 +58,6 @@ DECLARE_EVENT_CLASS(drm_sched_job,
> TP_PROTO(struct drm_sched_job *sched_job, struct drm_sched_entity *entity),
> TP_ARGS(sched_job, entity),
> TP_STRUCT__entry(
> - __field(uint64_t, id)
> __string(name, sched_job->sched->name)
> __field(u32, job_count)
> __field(int, hw_job_count)
> @@ -69,7 +68,6 @@ DECLARE_EVENT_CLASS(drm_sched_job,
> ),
>
> TP_fast_assign(
> - __entry->id = sched_job->id;
> __assign_str(name);
> __entry->job_count = spsc_queue_count(&entity->job_queue);
> __entry->hw_job_count = atomic_read(
> @@ -79,8 +77,8 @@ DECLARE_EVENT_CLASS(drm_sched_job,
> __entry->fence_seqno = sched_job->s_fence->finished.seqno;
> __entry->client_id = sched_job->s_fence->drm_client_id;
> ),
> - TP_printk("dev=%s, id=%llu, fence=%llu:%llu, ring=%s, job count:%u, hw job count:%d, client_id:%llu",
> - __get_str(dev), __entry->id,
> + TP_printk("dev=%s, fence=%llu:%llu, ring=%s, job count:%u, hw job count:%d, client_id:%llu",
> + __get_str(dev),
> __entry->fence_context, __entry->fence_seqno, __get_str(name),
> __entry->job_count, __entry->hw_job_count, __entry->client_id)
> );
> @@ -117,7 +115,6 @@ TRACE_EVENT(drm_sched_job_add_dep,
> TP_STRUCT__entry(
> __field(u64, fence_context)
> __field(u64, fence_seqno)
> - __field(u64, id)
> __field(u64, ctx)
> __field(u64, seqno)
> ),
> @@ -125,12 +122,11 @@ TRACE_EVENT(drm_sched_job_add_dep,
> 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,
> + TP_printk("fence=%llu:%llu depends on fence=%llu:%llu",
> + __entry->fence_context, __entry->fence_seqno,
> __entry->ctx, __entry->seqno)
> );
>
> @@ -140,7 +136,6 @@ TRACE_EVENT(drm_sched_job_unschedulable,
> TP_STRUCT__entry(
> __field(u64, fence_context)
> __field(u64, fence_seqno)
> - __field(uint64_t, id)
> __field(u64, ctx)
> __field(u64, seqno)
> ),
> @@ -148,12 +143,11 @@ TRACE_EVENT(drm_sched_job_unschedulable,
> 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 unsignalled fence=%llu:%llu",
> - __entry->fence_context, __entry->fence_seqno, __entry->id,
> + TP_printk("fence=%llu:%llu depends on unsignalled fence=%llu:%llu",
> + __entry->fence_context, __entry->fence_seqno,
> __entry->ctx, __entry->seqno)
> );
>
> diff --git a/drivers/gpu/drm/scheduler/sched_main.c b/drivers/gpu/drm/scheduler/sched_main.c
> index 85c2111e5500..85e0ba850746 100644
> --- a/drivers/gpu/drm/scheduler/sched_main.c
> +++ b/drivers/gpu/drm/scheduler/sched_main.c
> @@ -848,7 +848,6 @@ void drm_sched_job_arm(struct drm_sched_job *job)
>
> job->sched = sched;
> job->s_priority = entity->priority;
> - job->id = atomic64_inc_return(&sched->job_id_count);
>
> drm_sched_fence_init(job->s_fence, job->entity);
> }
> diff --git a/include/drm/gpu_scheduler.h b/include/drm/gpu_scheduler.h
> index 032214a49138..ddc24512c281 100644
> --- a/include/drm/gpu_scheduler.h
> +++ b/include/drm/gpu_scheduler.h
> @@ -326,7 +326,6 @@ struct drm_sched_fence *to_drm_sched_fence(struct dma_fence *f);
> * @finish_cb: the callback for the finished fence.
> * @credits: the number of credits this job contributes to the scheduler
> * @work: Helper to reschedule job kill to different context.
> - * @id: a unique id assigned to each job scheduled on the scheduler.
> * @karma: increment on every hang caused by this job. If this exceeds the hang
> * limit of the scheduler then the job is marked guilty and will not
> * be scheduled further.
> @@ -339,8 +338,6 @@ struct drm_sched_fence *to_drm_sched_fence(struct dma_fence *f);
> * to schedule the job.
> */
> struct drm_sched_job {
> - u64 id;
> -
> /**
> * @submit_ts:
> *
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