On 05/07/2015 06:17 PM, Matt Turner wrote: > On Thu, May 7, 2015 at 4:50 PM, Jason Ekstrand <ja...@jlekstrand.net> wrote: >> GLSL IR vs. NIR shader-db results for SIMD8 vertex shaders on Broadwell: >> >> total instructions in shared programs: 2724483 -> 2711790 (-0.47%) >> instructions in affected programs: 1860859 -> 1848166 (-0.68%) >> helped: 4387 >> HURT: 4758 >> GAINED: 1499 >> >> The gained programs are ARB vertext programs that were previously going >> through the vec4 backend. Now that we have prog_to_nir, ARB vertex >> programs can go through the scalar backend so they show up as "gained" in >> the shader-db results. > > Again, I'm kind of confused and disappointed that we're just okay with > hurting 4700 programs without more analysis. I guess I'll go do > that...
Yeah... I think I just (foolishly) assumed it was mostly +/- small amounts given the % in affected programs. > I'm concerned -- lots of shaders like left-4-dead-2/low/3699 go from > 297 -> 161 instructions. More concerning, the number of send > instructions drop from 36 to 12, and a loop that was 111 instructions > long suddenly becomes > > START B1 <-B0 <-B2 > cmp.ge.f0(8) null g42<8,8,1>D g7<0,1,0>D > (+f0) break(8) JIP: 24 UIP: 24 > END B1 ->B3 ->B2 > START B2 <-B1 > add(8) g42<1>D g42<8,8,1>D 1D > while(8) JIP: -32 > END B2 ->B1 > > That deserves a lot more investigation. I'll take a gamble and say > something is broken. Yikes. I guess I'm surprised that piglit+gles3conform+deqp didn't already find > _______________________________________________ > mesa-dev mailing list > mesa-dev@lists.freedesktop.org > http://lists.freedesktop.org/mailman/listinfo/mesa-dev _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
