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

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Jan 14 18:00:58 UTC 2019


--- Comment #20 from Ian Romanick <idr at freedesktop.org> ---
(In reply to Eero Tamminen from comment #19)
> Sorry, I somehow missed the download link (I haven't really looked at gitlab
> MRs before):
> https://gitlab.freedesktop.org/mesa/mesa/merge_requests/107.patch
> Performance-wise your changes mostly fix the regressing test-cases.
> There are still following gaps:
> * Deferred Multisampling: 0.5% (down from 27%)
> * Compute N-Body: 3% (down from 9%)

I was not able to reproduce this on my system.  With system Mesa and the branch
from the MR I get 34-35 fps.  I looked at the assembly generated before
8fb8ebfbb05d and after this series, and, aside from slightly different register
assignment, there's no difference.

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