[PlanetCCRMA] Help with APIC/IRQ setup...

[Mark Knecht]

Brian,
   Sure - I understand, but without some hard data on what sort of
problems it is quite hard to make a constructive suggestion.

   If you are using QJackCtl then open the message window and watch
for xruns when you get the pops. If you see a correlation then we'll
look deeper.

   BTW - with APIC interrupts such as you are using right now you
cannot tune the interrupts. With some of the Planet kernels you can
modify whether they are threaded or not which can have a bit impact
but let's not go there unless needed.

   you may also be able to disable APIC usage at the kernel command
line with some (herein made-up) command like APIC=off. We'd have to
look around for info on exactly how to do that, but again why bother
if we're not sure of any real problem yet.

cheers,
Mark

On 6/22/05, Brian Jarrett <bjarrett at garcoschools.org> wrote:
> The only thing I've noticed is some pops when I was recording a single
> track in Ardour, but I've not really done anything to configure it and
> haven't done much else with my new system.
> 
> I was just following the instructions and attempting to tune the system.
> *grin*
> 
> Brian
> 
> > -----Original Message-----
> > From: Mark Knecht [mailto:markknecht at gmail.com]
> > Sent: Wednesday, June 22, 2005 12:48 PM
> > To: Brian Jarrett
> > Cc: planetccrma at ccrma.stanford.edu
> > Subject: Re: [PlanetCCRMA] Help with APIC/IRQ setup...
> >
> > Do you need to do anything? You don't speak of any xrun problems here.
> > Are you having any troubles with the default setup that would really
> > require a change?
> >
> > - Mark
> >
> > On 6/22/05, Brian Jarrett <bjarrett at garcoschools.org> wrote:
> > > Hello all,
> > >
> > > I've got a Gigabyte K8NS Ultra939 MB w/AMD64 CPU and 2 SATA HDD.
> > >
> > > I've installed 32bit FC3 and loaded "the Planet" audio apps.
> > >
> > > I haven't been able to "tune" the system by adjusting IRQs, or
> causing
> > > the system to do it, and I'm not even sure if I need to.  Here's my
> > > /proc/interrupts:
> > >
> > >            CPU0
> > >   0:     267756    IO-APIC-edge  timer
> > >   1:        268    IO-APIC-edge  i8042
> > >   8:          1    IO-APIC-edge  rtc
> > >   9:          0   IO-APIC-level  acpi
> > >  12:       1766    IO-APIC-edge  i8042
> > >  15:        864    IO-APIC-edge  ide1
> > >  16:      21284   IO-APIC-level  ICE1712, nvidia
> > >  17:      12942   IO-APIC-level  libata
> > >  18:          3   IO-APIC-level  ohci1394
> > >  20:          2   IO-APIC-level  ehci_hcd
> > >  21:          0   IO-APIC-level  NVidia CK8S, ohci_hcd
> > >  22:      23934   IO-APIC-level  ohci_hcd, eth0
> > > NMI:          0
> > > LOC:     267680
> > > ERR:          0
> > > MIS:          0
> > >
> > > I don't see any way to turn off APIC in the BIOS and I've tried
> > > kernel-level options "noapic" and "apic=off" but it seems to have no
> > > effect.
> > >
> > > Of course, I'd like my Delta66 (ICE1712) to have as high a priority
> as
> > > possible.  The things I have tried are a result of reading a lot of
> > > information that doesn't even really apply directly to dealing with
> > > APIC.
> > >
> > > Any suggestions?  I'm out of ideas, if there's anything I can even
> do
> > > about it.
> > >
> > > Brian
> > >
> > > _______________________________________________
> > > PlanetCCRMA mailing list
> > > PlanetCCRMA at ccrma.stanford.edu
> > > http://ccrma-mail.stanford.edu/mailman/listinfo/planetccrma
> > >
> 
> 
>