On Sat, 25 Feb 2012 12:00:07 +0100, Daniel Vetter <dan...@ffwll.ch> wrote: > On Fri, Feb 24, 2012 at 07:53:22PM -0800, Eric Anholt wrote: > > This improves the performance of Mesa's GL_MAP_UNSYNCHRONIZED_BIT path > > in GL_ARB_map_buffer_range. Improves Unigine Tropics performance at > > 1024x768 by 2.06236% +/- 0.50272% (n=11). > > --- > > A few questions: > - iirc Ben's non-blocking stuff also worked for non-llc machines - I guess > you haven't looked into this because we don't have a non-llc platform > that runs ungine?
I gave up on Ben's non-blocking stuff for being way too many patches all smashed into one. I wanted a simple fix that could be extended later if other apps have other problems, while completely fixing this app (a ~21ms wait shortly after starting a new frame). > - in my pwrite experience, writing through cpu maps beats writing through > the gtt on llc machines. This has the added benefit that it reduces > pressure on the mappable gtt. Have you tried that, too? I haven't played with that, but it would be fun to at some point once we get there. Right now, the CPU overhead of the app isn't in this path.
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