On Wed, Apr 26, 2017 at 06:00:41PM +0300, David Weinehall wrote: > Add a bunch of MOCS entries for gen 9 that were missing from intel_mocs. > Some of these are used by media-sdk; if these entries are missing > the default will instead be to do everything uncached. > > This patch improves media-sdk performance with up to 60% > with the (admittedly synthetic) benchmarks we use in our nightly > testing, without regressing any other benchmarks. Hey David, I am testing some of the extended MOCS with Mesa and the differences I see fit in the margins of statistical error. Odd, I thought, so to make sure I haven't messed up anything in the process of compiling, setting LD_LIBRARY_PATH and benchmarking I turned everything to UNCACHED - and I saw severe performance drop. So here is the question it induced: Have you used the "closest neighbour" from entries available or did you defaulted to the UNCACHED ones? That could be the culprit. Note: I have tested MOCS for VB and Render Target only, and only in a few synthetic cases - it will require much more fine-tuning and benchmarking before any final conclusions. -- Cheers, Arek _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
