On 12/09/2010 09:35 AM, Robin Gareus wrote:
On 11/27/10 13:11, Arnold Krille wrote:
Set ther cpu-governor to performance (so it doesn't switch frequencies which
produces xruns) but reduce the maximum allowed frequency.
what kernel are you running?
I do have realtime-kernels (2.6.31.12-rt21, 2.6.33.7-rt29) running on 4
PCs/Laptops (Intel core duo 32bit, Intel Core 2 Duo 64bit, Atom and an
Intel-i5) and on none of them frequency-scaling ever caused any x-runs.
The ondemand governor is ruling them all.
Lucky you! :-) I have problems here running rt29 on a Lenovo T510
laptop. Frequency scaling causes xruns. And I found (after wasting a lot
of time on other possible causes) that setting the governor to
"Performance" was actually not enough. You had to actually stop the
cpuspeed daemon and then the xruns would just go away.
..what does cause problems here is FSBus frequency scaling, I've
disabled that in the BIOS.
Good to know! I suspect my laptop will not have that degree of configurability in the BIOS but I'll try that with out desktops.
-- Fernando
It /might/ be an issue with other CPUs or mainboards.. or non-RT
systems, or with extreme low latency. But I'm not seeing any issues with
freq scaling even at 32*2@48kHz.
ciao,
robin
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@xxxxxxxxxxxxxxxxxxxx
http://lists.linuxaudio.org/listinfo/linux-audio-user
_______________________________________________
Linux-audio-user mailing list
Linux-audio-user@xxxxxxxxxxxxxxxxxxxx
http://lists.linuxaudio.org/listinfo/linux-audio-user
