Kenneth Graunke <kenn...@whitecape.org> writes: > On 01/20/2013 02:59 PM, Eric Anholt wrote: >> Before, we were keeping a CPU-only buffer to accumulate the batchbuffer in, >> which was an improvement over mapping the batch through the GTT directly >> (since any readback or other failure to stream through write combining >> correctly would hurt). However, on LLC-sharing architectures we can do >> better >> by mapping the batch directly, which reduces the cache footprint of the >> application since we no longer have this extra copy of a batchbuffer around. >> >> Improves performance of GLBenchmark 2.1 offscreen on IVB by 3.5% +/- 0.4% >> (n=21). Improves Lightsmark performance by 1.1 +/- 0.1% (n=76). Improves >> cairo-gl performance by 1.9% +/- 1.4% (n=57). >> >> No statistically significant difference in GLB2.1 on SNB (n=37). Improves >> cairo-gl performance by 2.1% +/- 0.1% (n=278). > > Looks good to me. Have you tested this on a non-LLC machine?
Not in a long time. It shouldn't affect performance, since they get the same behavior as before.
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