[linux-audio-user] APIC, IRQ, and an HDSP9652

Hi all,
This is my first post here, so hello everybody. I'm running
PlanetCCRMA's FC3 distro (low-latency kernel
2.6.11-0.3.rdt.rhfc3.ccrma) on an Athlon 64 3000+ w. an NF4 chipset.
As far as sound goes, I'm using the integrated CK804 (w. snd-intel8x0
drivers) and an RME HDSP9652 (w. snd-hdsp).

The questions:
1. I've read a lot about getting the IRQ of the soundcard to as high a
priority as possible. How important is this? Is it possible with
setpci if I reserve an IRQ in the BIOS, or only by swapping cards?
2. Should I enable or disable APIC? I've heard muddy answers, but
what I know is that it always leaves my HDSP9652 at IRQ's from 16-20.
Here's the output of cat /proc/interrupts.
# cat /proc/interrupts
           CPU0
  0: 1556590 XT-PIC timer 0/56590
  1: 3324 XT-PIC i8042 0/3324
  2: 0 XT-PIC cascade 0/0
  3: 3948 XT-PIC NVidia CK804 0/3948
  4: 0 XT-PIC hdsp 0/0
  5: 97413 XT-PIC ohci_hcd, nvidia 0/97413
  7: 0 XT-PIC parport0 0/0
  8: 1 XT-PIC rtc 0/1
  9: 0 XT-PIC acpi 0/0
 10: 0 XT-PIC libata, ehci_hcd 0/0
 11: 37516 XT-PIC libata, eth0 0/37516
 12: 146561 XT-PIC i8042 0/46561
 14: 15416 XT-PIC ide0 0/15416
 15: 12105 XT-PIC ide1 0/12105
NMI: 0
LOC: 1556573
ERR: 0
MIS: 0

3. Would you recommend I set my first soundcard to be the CK804 or
should I leave the RME as the first soundcard?
4. Should I just disable the CK804 and throw in an emu10k1? Becuase I
could do that, too.

Any help would be appreciated, and if I left something out, let me
know. Thanks!
-Nathan
Received on Thu Nov 10 16:15:05 2005