[alsa-devel] pulseaudio eats 19% CPU power in Fedora 12

Raymond Yau superquad.vortex2 at gmail.com
Wed Apr 21 02:30:09 CEST 2010

2010/4/19 Daniel Chen <seven.steps at gmail.com>

>  but, like
> Lennart suggests, these are by no means *caused* by PulseAudio.
> Best,
> -Dan
There are other factor affecting CPU usage  significantly

1) the number of pulseaudio clients connected to PA server (i.e. number of
audio stream need to be mixed )
2) the accuracy of system timer and the clock of the sound chip
3) the latency requirement of the different PA clients
4) the resampling method
5) the cpu loading of the system
6) the period time/period size selected by PA server to configure the alsa

why do you ruled out the cause ?

>> If you use "pacat" you can play audio with almost zero CPU

do you get the zero CPU usage in  Ubuntu 9.04/Ubuntu 9.10 with pacat on your
machines ?

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