28 Sep
2004
28 Sep
'04
11:32 p.m.
brad stafford wrote:
I just tonight switched from the Planet CCRMA RH9 to
FC1. The install
was purely from the CDROMs dated 4/25/2004.
I've seen all the latest posts about interrupts and did the required
reading on the internet. I really managed to get RH9 cleaned up but in
FC1 I'm seeing something a little different. I have a Delta 1010 and I'm
running an AMD Barton 2.6 with 5 PCI slots. The question is what the
heck are IRQ 16 and 22? I moved the sound and ethernet cards around to
get them to 16 and 22 as they used to be eth0 on 21 and ICE1712 on 22. I
have ACPI turned off as a service but don't have a "disable" option in
the BIOS. I did turn off USB support in the BIOS.
Is 16 like the equivalent of IRQ 3 since it's following 15?
[brad@mars brad]$ cat /proc/interrupts
CPU0
0: 81690 IO-APIC-edge timer
1: 75 IO-APIC-edge keyboard
2: 0 XT-PIC cascade
8: 1 IO-APIC-edge rtc
9: 0 IO-APIC-level acpi
12: 836 IO-APIC-edge PS/2 Mouse
14: 10789 IO-APIC-edge ide0
15: 735 IO-APIC-edge ide1
16: 0 IO-APIC-level ICE1712
22: 21 IO-APIC-level eth0
NMI: 0
LOC: 81633
ERR: 0
MIS: 0
I'm getting 5.8 msec latency in JACK with 128 frames/period at 44100 and
2 periods/buffer. A huge improvement over the 46.1 msec using RH9 with
capabilities.
Thanks, Brad.
You can add the "acpi=off" option to the kernel argument boot line
in grub.conf like so:
kernel /vmlinuz-2.4.26-1.ll.rhfc1.ccrma ro root=/dev/hda2 hdc=ide-scsi
acpi=off nolapic rhgb
That will get rid of interrupts 16 and 22 and move your soundcard and
ethernet card to *maybe* a more desirable position like IRQ 10 & 11. But
after reading the other posts in this thread I question if it really
makes any difference.
Rick B