From: Chris Wilson <chris@chris-wilson.co.uk>
To: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Cc: Intel-gfx@lists.freedesktop.org
Subject: Re: [PATCH v4] drm/i915: Execlists small cleanups and micro-optimisations
Date: Mon, 29 Feb 2016 10:53:02 +0000 [thread overview]
Message-ID: <20160229105302.GA18276@nuc-i3427.alporthouse.com> (raw)
In-Reply-To: <56D4214E.5080804@linux.intel.com>
On Mon, Feb 29, 2016 at 10:45:34AM +0000, Tvrtko Ursulin wrote:
> This ok?
>
> """
> One unexplained result is with "gem_latency -n 0" (dispatching
> empty batches) which shows 5% more throughput, 8% less CPU time,
> 25% better producer and consumer latencies, but 15% higher
> dispatch latency which looks like a possible measuring artifact.
> """
I doubt it is a measuring artefact since throughput = 1/(dispatch +
latency + test overhead), and the dispatch latency here is larger than
the wakeup latency and so has greater impact on throughput in this
scenario.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
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next prev parent reply other threads:[~2016-02-29 10:53 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-02-26 15:37 [PATCH] drm/i915: Execlists small cleanups and micro-optimisations Tvrtko Ursulin
2016-02-26 16:03 ` ✗ Fi.CI.BAT: failure for " Patchwork
2016-02-26 16:36 ` [PATCH] " Chris Wilson
2016-02-26 16:58 ` [PATCH v4] " Tvrtko Ursulin
2016-02-26 20:24 ` Chris Wilson
2016-02-29 10:45 ` Tvrtko Ursulin
2016-02-29 10:53 ` Chris Wilson [this message]
2016-02-29 11:01 ` Tvrtko Ursulin
2016-02-29 11:13 ` Chris Wilson
2016-02-29 11:40 ` Tvrtko Ursulin
2016-02-29 11:48 ` Chris Wilson
2016-02-29 11:59 ` Tvrtko Ursulin
2016-03-01 10:21 ` Tvrtko Ursulin
2016-03-01 10:32 ` Chris Wilson
2016-03-01 10:41 ` Tvrtko Ursulin
2016-03-01 10:57 ` Chris Wilson
2016-03-01 10:32 ` Chris Wilson
2016-02-26 17:27 ` ✗ Fi.CI.BAT: failure for drm/i915: Execlists small cleanups and micro-optimisations (rev2) Patchwork
2016-02-29 10:16 ` Tvrtko Ursulin
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