Le 13/08/2012 19:40, Peter Meerwald a ?crit :> 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
