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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - Issue of CPU usage with HiFiBerry driver snd_soc_hifiberry_amp with Debian Wheezy kernel 3.12.28"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84585#c69">Comment # 69</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - Issue of CPU usage with HiFiBerry driver snd_soc_hifiberry_amp with Debian Wheezy kernel 3.12.28"
href="https://bugs.freedesktop.org/show_bug.cgi?id=84585">bug 84585</a>
from <span class="vcard"><a class="email" href="mailto:superquad.vortex2@gmail.com" title="Raymond <superquad.vortex2@gmail.com>"> <span class="fn">Raymond</span></a>
</span></b>
<pre>as aplay can only run without underrun when buffer time above 23ms
this mean the way of increasing minimal latency from 1ms is too agressive
( 11.678| 0.257) I: [alsa-sink] alsa-sink.c: Increasing minimal latency to
1.00 ms
( 11.679| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 105.00ms
( 11.679| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=334280
( 11.679| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=84012
( 11.680| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 105.00ms
( 11.680| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=334280
( 11.680| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=84012
( 11.935| 0.255) I: [alsa-sink] alsa-sink.c: Increasing minimal latency to
2.00 ms
( 11.936| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 105.00ms
( 11.936| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=334280
( 11.936| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=84012
( 11.937| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 105.00ms
( 11.937| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=334280
( 11.937| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=84012
( 12.192| 0.255) I: [alsa-sink] alsa-sink.c: Increasing minimal latency to
4.00 ms
( 12.193| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 105.00ms
( 12.193| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=334280
( 12.193| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=84012
( 12.193| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 105.00ms
( 12.194| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=334280
( 12.194| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=84012
( 12.449| 0.255) I: [alsa-sink] alsa-sink.c: Increasing minimal latency to
8.00 ms
( 12.450| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 105.00ms
( 12.450| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=334280
( 12.450| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=84012
( 12.450| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 105.00ms
( 12.451| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=334280
( 12.451| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=84012
( 12.706| 0.255) I: [alsa-sink] alsa-sink.c: Increasing minimal latency to
16.00 ms
if you think the bug is related to pulseaudo
<a href="http://colin.guthr.ie/2010/09/compiling-and-running-pulseaudio-from-git/">http://colin.guthr.ie/2010/09/compiling-and-running-pulseaudio-from-git/</a></pre>
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