On Thu, Apr 27, 2017 at 04:55:20PM +0200, Arkadiusz Hiler wrote: > 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. As I mentioned in the commit message, the improvements only manifest themselves for media-sdk workloads (and presumably other workloads that uses the same hardware); if you see any performance regressions with these additional entries I'd be interested to know. Kind regards, David Weinehall _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
