Re: [linux-audio-user] Is everyone sick of interrupts yet?

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Subject: Re: [linux-audio-user] Is everyone sick of interrupts yet?
From: Lee Revell (rlrevell_AT_joe-job.com)
Date: Tue Sep 28 2004 - 22:09:54 EEST


On Tue, 2004-09-28 at 11:40, R Parker wrote:
> With my setup, I'm getting decent enough reliability
> at 128 frames but when I record and mix, I turn it
> back to 1024. Under no circumstances can I tolerate a
> single xrun.
>

If you cannot tolerate a single xrun, then you NEED to use a low latency
kernel. Screwing around with interrupts and the FC2 kernel is a waste
of time. I get no xruns at 32 (!) frames using 2.6 with the VP patches,
and my soundcard shares an interrupt with USB:

rlrevell_AT_mindpipe:~$ cat /proc/interrupts
           CPU0
  0: 65522406 XT-PIC timer 0/22406
  1: 17900 XT-PIC i8042 2/17900
  2: 0 XT-PIC cascade 0/0
  8: 10844340 XT-PIC rtc 0/44340
 10: 191142 XT-PIC uhci_hcd, EMU10K1 0/91142
 11: 2875535 XT-PIC uhci_hcd, eth0 0/75535
 12: 0 XT-PIC uhci_hcd 0/0
 15: 163810 XT-PIC ide1 0/63809
NMI: 0
ERR: 0

rlrevell_AT_mindpipe:~$ uname -r
2.6.9-rc2-mm3-VP-S6

Lee


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