On Nov 12, 2007 6:21 PM, Pieter Palmers <pieterp@xxxxxxx> wrote: > Cory K. wrote: > > The Ubuntu Studio team is considering shipping Compiz (with a minimal > > config) in Ubuntu Studio-Hardy 8.08. > > > > Some have said that moving the drawing of windows off the the GFX card > > would help the load on the CPU and thus keep xruns to a minimum. > > > > Any thoughts/ideas on this one? > > My stance would be that xruns are not that much dependent on load as > they are on interrupts. If your machine is not at the maximum of its > capabilities, xruns only seem to occur when certain I/O related events > are happening. One of the most problematic I/O types in my experience is > the video card I/O. So the question is whether you're not making things > worse. > > When running a properly configured RT-patched kernel that prioritizes > the video card IRQ low enough, it could be a good idea. When the config > is bad, it will IMHO only increase the problems. Since recently, I'm using compiz-fusion on my music laptop. Luckily, my IRQs are not a bother as long as I don't use the internal sound card : 16: 150106 IO-APIC-fasteoi uhci_hcd:usb5, HDA Intel, radeon@pci:0000:01:00.0 17: 7 IO-APIC-fasteoi yenta, hdsp Latency is set to 2.66ms. The most problematic clients causing runs on my system are those unadapted to RT work (xmms2 and mplayer...) and it's only a dozen/hour... But still, I get a few random xruns that seem to happen without any explainable cause... Not sure what they are. I'll have to dig a bit more someday. __________________ Marc-Olivier Barre, MarcO'Chapeau. _______________________________________________ Linux-audio-user mailing list Linux-audio-user@xxxxxxxxxxxxxxxxxxxx http://lists.linuxaudio.org/mailman/listinfo/linux-audio-user
