From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
To: Chris Wilson <chris@chris-wilson.co.uk>, Intel-gfx@lists.freedesktop.org
Subject: Re: [Intel-gfx] [PATCH 1/5] drm/i915: Track per-context engine busyness
Date: Mon, 16 Dec 2019 13:09:04 +0000 [thread overview]
Message-ID: <f48c66db-d224-e213-e8ac-7d4ceefe9652@linux.intel.com> (raw)
In-Reply-To: <157650003726.2428.7411733849297083759@skylake-alporthouse-com>
On 16/12/2019 12:40, Chris Wilson wrote:
> Quoting Tvrtko Ursulin (2019-12-16 12:07:00)
>> @@ -1389,6 +1415,9 @@ static void execlists_submit_ports(struct intel_engine_cs *engine)
>> write_desc(execlists,
>> rq ? execlists_update_context(rq) : 0,
>> n);
>> +
>> + if (n == 0)
>> + intel_context_stats_start(&rq->hw_context->stats);
>
> Too early? (Think preemption requests that may not begin for a few
> hundred ms.) Mark it as started on promotion instead (should be within a
> few microseconds, if not ideally a few 10 ns)? Then you will also have
> better symmetry in process_csb, suggesting that we can have a routine
> that takes the current *execlists->active with fewer code changes.
Good point, I was disliking the csb latencies and completely missed the
preemption side of things. Symmetry will be much better in more than one
aspect.
Regards,
Tvrtko
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next prev parent reply other threads:[~2019-12-16 13:09 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-16 12:06 [Intel-gfx] [PATCH 0/5] Per client engine busyness Tvrtko Ursulin
2019-12-16 12:07 ` [Intel-gfx] [PATCH 1/5] drm/i915: Track per-context " Tvrtko Ursulin
2019-12-16 12:40 ` Chris Wilson
2019-12-16 13:09 ` Tvrtko Ursulin [this message]
2020-01-30 18:05 ` Tvrtko Ursulin
2020-01-30 21:42 ` Chris Wilson
2019-12-16 12:07 ` [Intel-gfx] [PATCH 2/5] drm/i915: Expose list of clients in sysfs Tvrtko Ursulin
2019-12-16 12:51 ` Chris Wilson
2019-12-16 18:34 ` Tvrtko Ursulin
2019-12-16 12:53 ` Chris Wilson
2019-12-16 13:13 ` Tvrtko Ursulin
2019-12-17 17:21 ` Tvrtko Ursulin
2019-12-17 17:26 ` Chris Wilson
2019-12-16 12:55 ` Chris Wilson
2019-12-16 13:16 ` Tvrtko Ursulin
2019-12-16 13:17 ` Chris Wilson
2019-12-16 13:28 ` Tvrtko Ursulin
2019-12-16 13:41 ` Chris Wilson
2019-12-16 12:07 ` [Intel-gfx] [PATCH 3/5] drm/i915: Update client name on context create Tvrtko Ursulin
2019-12-16 12:57 ` Chris Wilson
2019-12-16 12:07 ` [Intel-gfx] [PATCH 4/5] drm/i915: Expose per-engine client busyness Tvrtko Ursulin
2019-12-16 12:07 ` [Intel-gfx] [PATCH 5/5] drm/i915: Add sysfs toggle to enable per-client engine stats Tvrtko Ursulin
2019-12-16 13:09 ` [Intel-gfx] [PATCH 0/5] Per client engine busyness Chris Wilson
2019-12-16 13:20 ` Tvrtko Ursulin
2019-12-16 17:45 ` [Intel-gfx] ✗ Fi.CI.CHECKPATCH: warning for " Patchwork
2019-12-16 17:58 ` [Intel-gfx] ✗ Fi.CI.BAT: failure " Patchwork
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