[pulseaudio-discuss] How to decrease cpu usage?

[Goldy]

Le 13/08/2012 19:40, Peter Meerwald a écrit :> Hello,
>
>> At this point, on system wide running, pulseaudio uses 34% cpu when it
>> idles, when music is played, it uses 42%. It's a lot on the 700 mhz
>> raspberry pi cpu, I'm pretty sure there is a way to decrease it, but
>> documentation don't talk about this point.
>
> that sounds way too high...
> unfortunately, the Broadcom CPU does not support ARM NEON
>
> I found that the ARM assembler code does not improve performance on a
> Cortex-A8, maybe it also helps to disable on the Raspberry?
>
>> I don't use the raspberry internal sound card, I plugged a little usb
>> Terratec aureon sound card, it works very well excepted the cpu usage...
>
> would be interesting to find out where the CPU time is spent; in
> PulseAudio or somethere in the USB stack...
>
> do you have a chance to do some profiling? maybe you can get oprofile to
> work?
>
> regards, p.
>

Hi Peter, thanks for your reply.

I'm afraid that probably out of my competences, but I currently compile
oprofile on the raspberry (it will probably take lot of time), and I
will try to do something with it.

Thanks again

Christophe