On Tue, Apr 23, 2024 at 04:56:48PM -0700, Lucas De Marchi wrote:
> From: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>
>
> Add a helper to accumulate per-client runtime of all its
> exec queues. Currently that is done in 2 places:
>
> 1. when the exec_queue is destroyed
> 2. when the sched job is completed
>
> Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@xxxxxxxxx>
> Signed-off-by: Lucas De Marchi <lucas.demarchi@xxxxxxxxx>
> ---
> drivers/gpu/drm/xe/xe_device_types.h | 9 +++++++
> drivers/gpu/drm/xe/xe_exec_queue.c | 37 ++++++++++++++++++++++++++++
> drivers/gpu/drm/xe/xe_exec_queue.h | 1 +
> drivers/gpu/drm/xe/xe_sched_job.c | 2 ++
> 4 files changed, 49 insertions(+)
>
> diff --git a/drivers/gpu/drm/xe/xe_device_types.h b/drivers/gpu/drm/xe/xe_device_types.h
> index 2e62450d86e1..33d3bf93a2f1 100644
> --- a/drivers/gpu/drm/xe/xe_device_types.h
> +++ b/drivers/gpu/drm/xe/xe_device_types.h
> @@ -547,6 +547,15 @@ struct xe_file {
> struct mutex lock;
> } exec_queue;
>
> + /**
> + * @runtime: hw engine class runtime in ticks for this drm client
> + *
> + * Only stats from xe_exec_queue->lrc[0] are accumulated. For multi-lrc
> + * case, since all jobs run in parallel on the engines, only the stats
> + * from lrc[0] are sufficient.
> + */
> + u64 runtime[XE_ENGINE_CLASS_MAX];
> +
> /** @client: drm client */
> struct xe_drm_client *client;
> };
> diff --git a/drivers/gpu/drm/xe/xe_exec_queue.c b/drivers/gpu/drm/xe/xe_exec_queue.c
> index 395de93579fa..b7b6256cb96a 100644
> --- a/drivers/gpu/drm/xe/xe_exec_queue.c
> +++ b/drivers/gpu/drm/xe/xe_exec_queue.c
> @@ -214,6 +214,8 @@ void xe_exec_queue_fini(struct xe_exec_queue *q)
> {
> int i;
>
> + xe_exec_queue_update_runtime(q);
> +
> for (i = 0; i < q->width; ++i)
> xe_lrc_finish(q->lrc + i);
> if (!(q->flags & EXEC_QUEUE_FLAG_PERMANENT) && (q->flags & EXEC_QUEUE_FLAG_VM || !q->vm))
> @@ -769,6 +771,41 @@ bool xe_exec_queue_is_idle(struct xe_exec_queue *q)
> q->lrc[0].fence_ctx.next_seqno - 1;
> }
>
> +/**
> + * xe_exec_queue_update_runtime() - Update runtime for this exec queue from hw
> + * @q: The exec queue
> + *
> + * Update the timestamp saved by HW for this exec queue and save runtime
> + * calculated by using the delta from last update. On multi-lrc case, only the
> + * first is considered.
> + */
> +void xe_exec_queue_update_runtime(struct xe_exec_queue *q)
> +{
> + struct xe_file *xef;
> + struct xe_lrc *lrc;
> + u32 old_ts, new_ts;
> +
> + /*
> + * Jobs that are run during driver load may use an exec_queue, but are
> + * not associated with a user xe file, so avoid accumulating busyness
> + * for kernel specific work.
> + */
> + if (!q->vm || !q->vm->xef)
> + return;
> +
> + xef = q->vm->xef;
> + lrc = &q->lrc[0];
> +
> + new_ts = xe_lrc_update_timestamp(lrc, &old_ts);
> +
> + /*
> + * Special case the very first timestamp: we don't want the
> + * initial delta to be a huge value
> + */
> + if (old_ts)
> + xef->runtime[q->class] += new_ts - old_ts;
> +}
> +
> void xe_exec_queue_kill(struct xe_exec_queue *q)
> {
> struct xe_exec_queue *eq = q, *next;
> diff --git a/drivers/gpu/drm/xe/xe_exec_queue.h b/drivers/gpu/drm/xe/xe_exec_queue.h
> index 02ce8d204622..45b72daa2db3 100644
> --- a/drivers/gpu/drm/xe/xe_exec_queue.h
> +++ b/drivers/gpu/drm/xe/xe_exec_queue.h
> @@ -66,5 +66,6 @@ struct dma_fence *xe_exec_queue_last_fence_get(struct xe_exec_queue *e,
> struct xe_vm *vm);
> void xe_exec_queue_last_fence_set(struct xe_exec_queue *e, struct xe_vm *vm,
> struct dma_fence *fence);
> +void xe_exec_queue_update_runtime(struct xe_exec_queue *q);
>
> #endif
> diff --git a/drivers/gpu/drm/xe/xe_sched_job.c b/drivers/gpu/drm/xe/xe_sched_job.c
> index cd8a2fba5438..6a081a4fa190 100644
> --- a/drivers/gpu/drm/xe/xe_sched_job.c
> +++ b/drivers/gpu/drm/xe/xe_sched_job.c
> @@ -242,6 +242,8 @@ bool xe_sched_job_completed(struct xe_sched_job *job)
> {
This seems like the wrong place. xe_sched_job_completed is a helper
which determines *if* a job completed it *not* when it is completed. The
DRM scheduler free_job callback is probably the right place
(guc_exec_queue_free_job or execlist_job_free). So just call
xe_exec_queue_update_runtime there?
Matt
> struct xe_lrc *lrc = job->q->lrc;
>
> + xe_exec_queue_update_runtime(job->q);
> +
> /*
> * Can safely check just LRC[0] seqno as that is last seqno written when
> * parallel handshake is done.
> --
> 2.43.0
>
