From: Chris Wilson <chris@chris-wilson.co.uk>
To: "Lawrynowicz, Jacek" <jacek.lawrynowicz@intel.com>,
Ben Widawsky <ben@bwidawsk.net>, Daniel Vetter <daniel@ffwll.ch>,
"Jesse Barnes (jbarnes@virtuousgeek.org)"
<jbarnes@virtuousgeek.org>
Cc: "intel-gfx@lists.freedesktop.org" <intel-gfx@lists.freedesktop.org>
Subject: Re: TIMESTAMP register
Date: Wed, 18 Apr 2012 09:05:43 +0100 [thread overview]
Message-ID: <1334736361_17281@CP5-2952> (raw)
In-Reply-To: <36D38C1F74839847A52A484C31F3E51A154A1D9F@IRSMSX101.ger.corp.intel.com>
On Wed, 18 Apr 2012 07:53:36 +0000, "Lawrynowicz, Jacek" <jacek.lawrynowicz@intel.com> wrote:
> But how would I synchronize GPU and CPU clocks without access to the TIMESTAMP
> register?
Issue a pipecontrol, compensate for the execution latency.
> And are you sure that over time both clocks won't desynchronize?
Given the assurrances made in the bspec, I'm certain the timestamp
will prove to be bogus and drift.
-Chris
--
Chris Wilson, Intel Open Source Technology Centre
next prev parent reply other threads:[~2012-04-18 8:06 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-04-17 19:12 TIMESTAMP register Lawrynowicz, Jacek
2012-04-17 19:39 ` Daniel Vetter
2012-04-17 20:34 ` Lawrynowicz, Jacek
2012-04-17 21:04 ` Daniel Vetter
2012-04-17 23:27 ` Ben Widawsky
2012-04-17 23:51 ` Chris Wilson
2012-04-18 6:32 ` Lawrynowicz, Jacek
2012-04-18 7:35 ` Chris Wilson
2012-04-18 7:53 ` Lawrynowicz, Jacek
2012-04-18 8:05 ` Chris Wilson [this message]
2012-04-30 21:11 ` Eric Anholt
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