Bug#547207: ogg123: widely different CPU usage between invocations

[Bernard Jungen]

Package: vorbis-tools
Version: 1.2.0-6

Since some time now I've noticed very odd CPU usage when playing Vorbis files
with ogg123, more precisely that its CPU bandwidth consumption can vary a lot
between different invocations.

Here are 3 consecutive timings I've done playing the same 44.1 KHz stereo
Vorbis file:

  13.568u 56.511s 3:21.36 34.7%   0+0k 0+0io 0pf+0w
  7.204u 21.321s 3:21.24 14.1%    0+0k 0+0io 0pf+0w
  3.932u 2.972s 3:21.22 3.4%      0+0k 0+0io 0pf+0w

So it's a real waste of CPU bandwidth in certain cases...

That doesn't seem to happen with mono files though.

Kernel: 2.6.18-4-k7 #1 SMP Mon Mar 26 17:57:15 UTC 2007 i686 GNU/Linux

libao2                               0.8.8-5
libc6                                2.7-8
libcurl3-gnutls                      7.16.2-6
libflac8                             1.2.1-1.2
libogg0                              1.1.4~dfsg-1
libspeex1                            1.2~rc1-1
libvorbis0a                          1.2.0.dfsg-6
libvorbisenc2                        1.2.0.dfsg-6
libvorbisfile3                       1.2.0.dfsg-6

I have the same problem with kernel 2.6.26-1-amd64 on a K8 (single core) on
another machine, where timings can differ by nearly a factor 10.

Cheers,

Bernard.