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

[Alex Deucher]

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).

Alex

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