On Sat, Mar 28, 2015 at 11:03 AM, Jason Ekstrand <ja...@jlekstrand.net> wrote: > On Fri, Mar 27, 2015 at 9:22 PM, Matt Turner <matts...@gmail.com> wrote: >> The typical case of mat4*mat4*vec4 is 80 scalar multiplications, but >> mat4*(mat4*vec4) is only 32. >> >> On HSW (with vec4 vertex shaders): >> instructions in affected programs: 4420 -> 3194 (-27.74%) >> >> On BDW (with scalar vertex shaders): >> instructions in affected programs: 12756 -> 6726 (-47.27%) > > Do you have any actual benchmark results with something that's > affected? That would be nice to know.
OglDrvShComp: 2.17761% +/- 0.324342% (n=12) It draws a bunch of different scenes (from other benchmarks), so I tried some of the other benchmarks, but couldn't find anything interesting. I'm guessing the patch is just improving compile performance which affects this benchmark. IIRC this is the one that Ken's loop unrolling patch really harmed performance of, so yeah, it's probably because of compile performance. Not interesting. _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
