[MPlayer-users] mp3lib/ffmp3 performance issues on via c7
Robert Henney
robh at rut.org
Fri Jun 20 03:12:40 CEST 2008
On Thu, Jun 19, 2008 at 06:33:03PM -0400, Robert Henney wrote:
>
> mp3lib ffmp3 ffvorbis
> pII cpu 1% 5% 5%
> c7 cpu 9% 15% 8%
I realize the results provided by top are fairly inaccurate. Here are
the process 'user' times returned with:
time mplayer sample.mp3 -ao pcm:file=/dev/null -ac $codec
mp3lib ffmp3 mad
pII 11 19 25
c7 19 42 54
done on an idle system, multiple times each to assure result was
consistent. oh, and I substituted mad for ffvorbis just to keep
everything mp3.
an initial reaction might be to conclude from the above that the c7
executes instructions less efficiently than the pII. however, the
video codecs in mplayer I've happened to test so far execute in less
time on the c7 (though not by much), so I'm left wondering just
what kindof code is being generated for those particular audio codecs.
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