[Mesa-dev] R600 tiling halves the frame rate

[Tzvetan Mikov]

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