13 Nov
2007
13 Nov
'07
6:05 a.m.
On Nov 12, 2007 6:21 PM, Pieter Palmers <pieterp(a)joow.be> wrote:
Cory K. wrote:
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.
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.