https://bugs.freedesktop.org/show_bug.cgi?id=65272
Priority: medium
Bug ID: 65272
Assignee: [email protected]
Summary: xf86-video-openchrome-0.3.3: speed up memcpy on NetBSD
Severity: normal
Classification: Unclassified
OS: NetBSD
Reporter: [email protected]
Hardware: Other
Status: NEW
Version: unspecified
Component: Driver/openchrome
Product: xorg
Created attachment 80166
--> https://bugs.freedesktop.org/attachment.cgi?id=80166&action=edit
Patch for the issue described above.
>From NetBSD's xsrc:
Remove a couple '#ifdef linux's to let the driver use optimized memcpy
functions on NetBSD for video copy. Gives nearly 2x performance on my
test system (previously "kernel" memcpy was always used):
CHROME(0): Benchmarking video copy. Less time is better.
CHROME(0): Timed libc YUV420 copy... 3000272. Throughput: 315.6 MiB/s.
CHROME(0): Timed kernel YUV420 copy... 3024946. Throughput: 313.0 MiB/s.
CHROME(0): Timed SSE YUV420 copy... 1591352. Throughput: 595.0 MiB/s.
CHROME(0): Timed MMX YUV420 copy... 2566279. Throughput: 369.0 MiB/s.
CHROME(0): Ditching 3DNow! YUV420 copy. Not supported by CPU.
CHROME(0): Timed MMX2 YUV420 copy... 1696662. Throughput: 558.1 MiB/s.
CHROME(0): Using SSE YUV42X copy for video.
Originally from Jared McNeill <[email protected]>
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