[Mesa-dev] i965: slow glTexSubImage2D because of Y tiling

[Tomash Brechko]

2013/12/27 Tomash Brechko <tomash.brechko at gmail.com>

> By forcing intel_region_alloc() to use I915_TILING_X I get 50% FPS rise
> (for glxgears 2400FPS -> 3600FPS in default window, 108FPS -> 175FPS for
> 1920x1080 fullscreen).
>

To clarify the statement about glxgears: of cource it doesn't use
glTexSubImage2D() itself, I was running it with
https://github.com/kroki/glxoffload which renders each frame on a different
GPU and then uploads the result to i965.



-- 
  Tomash Brechko
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