[Bug 109216] 4-27% performance drop in Vulkan benchmarks

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Fri Jan 11 18:41:16 UTC 2019


--- Comment #16 from Ian Romanick <idr at freedesktop.org> ---
(In reply to Eero Tamminen from comment #15)
> (In reply to Ian Romanick from comment #14)
> > Created attachment 143048 [details] [review] [review]
> > intel/compiler: Try nir_opt_if once before nir_opt_peephole_select
> This patch fixes the smaller perf regressions in (nbody & raytracing)
> compute tests, but it doesn't help at all with the largest regression, in
> Deferred Multisampling.

It appears that the inner loop still isn't getting unrolled because of the
problem this patch should have resolved.  I'll keep digging.

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