#739: runaway cpu usage when using bluetooth headset
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Reporter: carlroth | Owner: lennart
Type: defect | Status: new
Milestone: | Component: daemon
Keywords: |
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I enabled a bluetooth headset in pulseaudio, and noticed that after a
minute or so of use, the pulseaudio process spikes to close to 100% cpu.
This condition persists even after the audio device is no longer being
used.
Some relevant info:
system: Fedora 11 (x86_64)
hardware: wiREVO HSH200 bluetooth headset
pulseaudio-0.9.15-17.fc11.x86_64 (via Fedora RPMS)
bluez-4.42-9.fc11.x86_64
bluetooth client configuration (default.pa)
.nofail
load-module module-bluetooth-device profile=a2dp sink_name=wiREVO
address=00:08:D6:50:00:3A set-
default-sink wiREVO
set-card-profile wiREVO a2dp
.fail
server configuration (daemon.conf)
(default, with the addition of)
no-cpu-limit = yes
(this setting was required, else pulseaudio exits with 'soft cpu limit
exceeded'.
I reproduced the behavior by playing a sound sample (in this case, the KDE
login jingle) repeatedly until I saw the CPU usage spike.
Eventually, pulseaudio disabled the bluetooth headset (idle time) and the
CPU usage went down.
I've read anecdotal reports that the resampling algorithm can influence
CPU usage; I tried different settings including 'trivial' and 'src-linear'
and the effect was the same.
The playback quality does not seem to change regardless of the CPU usage
(this is a multi-core system).
--
Ticket URL: <http://pulseaudio.org/ticket/739>
PulseAudio <http://pulseaudio.org/>
The PulseAudio Sound Server
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