Bug 65272 - xf86-video-openchrome-0.3.3: speed up memcpy on NetBSD
Summary: xf86-video-openchrome-0.3.3: speed up memcpy on NetBSD
Status: RESOLVED FIXED
Alias: None
Product: xorg
Classification: Unclassified
Component: Driver/openchrome (show other bugs)
Version: unspecified
Hardware: Other NetBSD
: medium normal
Assignee: Openchrome development list
QA Contact:
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Depends on:
Blocks:
 
Reported: 2013-06-02 21:00 UTC by Thomas Klausner
Modified: 2013-06-03 18:55 UTC (History)
1 user (show)

See Also:
i915 platform:
i915 features:

Attachments
Patch for the issue described above. (1.45 KB, text/plain)
2013-06-02 21:00 UTC, Thomas Klausner 		no flags Details
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Description Thomas Klausner 2013-06-02 21:00:17 UTC 
Created attachment 80166 [details]
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 <jmcneill@NetBSD.org>
Comment 1 Xavier Bachelot 2013-06-03 18:55:36 UTC 
Committed, thanks for the patch.

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