Hi Vladislav, On 14 January 2017 at 01:50, Vladislav Egorov <vegorov...@gmail.com> wrote: > 14.01.2017 01:45, Timothy Arceri пишет: >> >> I'm asking for a chance to test before we jump in, its probably not a >> big deal and I may even still be able to reduce my use of hashing but >> it would be nice to be given a few days to test and even explore >> alternatives before jumping on this implementation. > > A very quick and very dirty simple benchmark. I took shader-cache from > github, branch shader-cache39. Then I've applied my preprocessor patch on > top (because shader-cache still uses preprocessor even if the shader is > cached and it was painful to see preprocessor taking more than half of the > whole time). Then I've compiled it with openssl and with the Emil's patch. > Full run on shader-db (300Mb+ of shaders) with shader-cache warmed up. It > takes 78s, spends in libcrypto 0.27%. With OpenBSD SHA1 it runs > approximately the same time, spends 0.53% in SHA1Transform() and other SHA1* > functions. Subtest - 46Mb of shaders from Total War: Attila - 3.10s (for > some reason, the cache works much faster on smaller subsets than on full > shader-db). 1.08% were spent in libcrypto, 1.04% in > sha1_block_data_order_avx2(). With OpenBSD 3.07s - 2.27% in SHA1Transform() > and other SHA1* functions. > Did you mean "shader-db" with the "shader-cache" references above ? I cannot find any projects with the latter name on github.
> Overall not that significant in context of shader-cache, but as expected, on > Haswell it's twice slower than OpenSSL's AVX2 implementation. If I understood you correctly you're saying that despite this implementation being slower the actual total runtime remains unchanged. In the Attila case we even get a minimal improvement, although I'm inclined to discard that as within the error margin. That sounds interesting, but in all honesty I don't believe it's worth worrying unless we have usecase(s) where the runtime difference is noticeable. Thanks Emil _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/mesa-dev
