Age | Commit message (Collapse) | Author |
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To do this, I had to clean up some of 965 state upload stuff. We may end
up over-emitting state in the aperture overflow case, but that should be rare,
and I'd rather have the simplification of state management.
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It turns out that it's not just deviceID dependent, and there's some additional
undefined factor that determines the bit 6 swizzling. It's now controllable
with swizzle_mode=[012] until we get a response on how to automatically detect.
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This lets GEM use pwrite, for an additional 4% or so speedup.
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Fencing was used in two places: ensuring that we didn't get too many frames
ahead of ourselves, and glFinish. glFinish will be satisfied by waiting on
buffers like we would do for CPU access on them. The "don't get too far ahead"
is now the responsibility of the execution manager (kernel).
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This is defaulted off as it has potentially large memory costs for a modest
performance gain. Ideally we will improve DRM performance to the point where
this optimization is not worth the memory cost in any case, or find some
middle ground in caching only limited numbers of certain buffers. For now,
this provides a modest 4% improvement in openarena on GM965 and 10% in openarena
on GM945.
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