[Mesa-dev] R600 tiling halves the frame rate

[Jerome Glisse]

On Fri, Oct 26, 2012 at 8:07 PM, Tzvetan Mikov <tmikov at jupiter.com> wrote:
> Hi,
> I have been running tests with Mesa 9.0 and Rdeon R600 (Radeon HD 6460) and I accidentally noticed that a small hack I did to disable texture tiling, actually *doubles* the frame rate. With different chips (e.g. 6750) the difference is less pronounced, but in all cases texture tiling decreased the performance noticeably in my tests.
>
> Can anyone shed some light on this? Is this by design - e.g. is this a case of "we know that tiling is currently slower than linear but the huge payoff is scheduled to arrive in a future revision"?
>
> Thanks!
> Tzvetan

No, in all benchmark i made on various gpu from hd2xxx to hd6xxx
tiling always gave a performance boost btw 5% up to 20%.

Cheers,
Jerome