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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#c70">Comment # 70</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>you get high cpu usage because pulseaudio keep the sleeping time remain at 20ms
638| 0.254) I: [alsa-sink] alsa-sink.c: Increasing wakeup watermark to 355.99
ms
( 28.895| 0.256) I: [alsa-sink] alsa-sink.c: Increasing minimal latency to
376.00 ms
( 28.895| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 376.00ms
( 28.895| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=286476
( 28.895| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=72502
( 28.896| 0.000) D: [alsa-sink] protocol-native.c: max_request changed,
trying to update from 71616 to 73380.
( 28.896| 0.000) D: [alsa-sink] protocol-native.c: Notifying client about
increased tlength
( 28.897| 0.000) D: [alsa-sink] alsa-sink.c: Latency set to 376.00ms
( 28.897| 0.000) D: [alsa-sink] alsa-sink.c: hwbuf_unused=286476
( 28.897| 0.000) D: [alsa-sink] alsa-sink.c: setting avail_min=72502
( 29.152| 0.254) I: [alsa-sink] alsa-sink.c: Increasing wakeup watermark to
365.99 ms
( 29.409| 0.257) I: [alsa-sink] alsa-sink.c: Increasing minimal latency to
386.00 ms</pre>
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