[Mesa-dev] [PATCH 3/3] r600g: Implement timer queries.

Alex Deucher alexdeucher at gmail.com
Sun Jan 23 17:08:20 PST 2011

2011/1/23 Mathias Fröhlich <Mathias.Froehlich at gmx.net>:
> Hi,
> Attached is a patch to implement timer queries for r600g.
> I have not found much documentation about the frequency of the gpu's timestamp
> counter. But What I have found indicates that it runs at 27MHz which is
> implemented in the patch and gives 'reasonable' query results with osgviewer.

It varies based on what crystal is on the card (27 Mhz is the most
common, but you also see 100 Mhz, and 14.32 Mhz as well).  We'll need
a new radeon_info ioctl query (see attached).


> Please review and may be apply.
> Thanks,
>  Mathias
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