Re: [linux-audio-user] Tuning Jack: Please help me prioritize IRQ 10

This has been a very timely discussion. I just got my son a new mobo, CPU
and RAM, and he's been having a lot of trouble using jack, ardour and hydrogen
until I followed the advice here and tuned his machine up. Thanks all!

On Sat, 20 Jan 2007 12:21:58 -0500
Rick Wright <riwright@email-addr-hidden> wrote:
> Thus, your command should be something like :
>
> /usr/bin/chrt -f -p 90 `pidof "IRQ 10"`

Here's a novel twist on all of this: my sound and video cards don't seem
to exist on my FC5 system, so I can't run this command!

For example, my audio card is a Delta 1010. lspci -v shows it:
02:0b.0 Multimedia audio controller: VIA Technologies Inc. ICE1712 [Envy24] PCI Multi-Channel I/O Controller (rev 02)
        Subsystem: VIA Technologies Inc. M-Audio Delta 1010
        Flags: bus master, medium devsel, latency 64, IRQ 11
        I/O ports at df80 [size=32]
        I/O ports at dfa0 [size=16]
        I/O ports at df60 [size=16]
        I/O ports at df00 [size=64]
        Capabilities: [80] Power Management version 1

However, it's not in /proc/interrupts, and trying to use chrt as shown
above fails:
[root@email-addr-hidden ~]# cat /proc/interrupts
           CPU0 CPU1
  0: 67992 2883426 IO-APIC-edge [........N/ 0] pit
  1: 8 0 IO-APIC-edge [........./ 0] i8042
  8: 1 0 IO-APIC-edge [........./ 0] rtc
  9: 0 1 IO-APIC-level [........./ 0] acpi
 12: 96 0 IO-APIC-edge [........./ 0] i8042
 14: 6779 89 IO-APIC-edge [........./ 2] ide0
 15: 28172 6252 IO-APIC-edge [........./ 2] ide1
 17: 2 0 IO-APIC-level [........./ 0] ehci_hcd:usb1
 18: 31 0 IO-APIC-level [........./ 0] uhci_hcd:usb2
 19: 1276 0 IO-APIC-level [........./ 0] skge
NMI: 0 0
LOC: 2951050 2954633
ERR: 0
MIS: 0
[root@email-addr-hidden ~]# chrt -f -p 82 `pidof "IRQ 11"`
sched_getscheduler: No such process
failed to get pid 82's policy

Hmmm, where's the process for IRQ 11??

[root@email-addr-hidden ~]# ps -ef | grep IRQ
root 33 27 0 15:28 ? 00:00:00 [IRQ 9]
root 249 27 0 15:28 ? 00:00:00 [IRQ 8]
root 268 27 0 15:28 ? 00:00:00 [IRQ 12]
root 296 27 0 15:28 ? 00:00:00 [IRQ 14]
root 299 27 0 15:28 ? 00:00:00 [IRQ 15]
root 350 27 0 15:28 ? 00:00:00 [IRQ 1]
root 838 27 0 15:28 ? 00:00:00 [IRQ 17]
root 860 27 0 15:28 ? 00:00:00 [IRQ 18]
root 897 27 0 15:28 ? 00:00:00 [IRQ 19]
root 1133 27 0 15:28 ? 00:00:00 [IRQ 6]

I'm really baffled here! Has anyone seen this? My video card (listed
as having IRQ 18) is equally missing in action as well. Thanks for any
clues sent this way.

-- 
======================================================================
       Joe Hartley - UNIX/network Consultant - jh@email-addr-hidden
Without deviation from the norm, "progress" is not possible. - FZappa