[Intel-gfx] TIMESTAMP register

Chris Wilson chris at chris-wilson.co.uk
Wed Apr 18 10:05:43 CEST 2012

On Wed, 18 Apr 2012 07:53:36 +0000, "Lawrynowicz, Jacek" <jacek.lawrynowicz at 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 Wilson, Intel Open Source Technology Centre

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