Joe Hartley wrote:
>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??
>
>
>
You can check for the pid with:
ps -Leo pid,pri,rtprio,cmd | grep IRQ
The first column is the pid, the third is the rtprio, which is what gets
set by the "chrt" command I posted previously. This is a good check
that you are able to set the "rtprio" value.
Once you have that pid, do:
/usr/bin/chrt -f -p 82 <pid>
The back-ticks and quotes are only required when this command is put in
a script.
>[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.
>
>
>
Received on Sun Jan 21 04:15:01 2007
This archive was generated by hypermail 2.1.8 : Sun Jan 21 2007 - 04:15:01 EET