Re: [linux-audio-user] IRQ sharing

From: Florin Andrei <florin@email-addr-hidden>
Date: Sun Mar 05 2006 - 12:02:18 EET

On Sun, 2006-03-05 at 03:35 -0500, Eric Dantan Rzewnicki wrote:
> Old school Linux Audio lore held that it was bad to let your audio card
> share an IRQ with anything else. Is this a myth, or still good solid
> practical advice?

It might still have some influence, but nowadays the typical hardware is
so fast, it doesn't matter like it used to.

I'm getting pretty good latency with no xruns when running jackd with
real-time priority, despite INT 5 being crowded like hell:

$ cat /proc/interrupts
           CPU0
  0: 5132562 XT-PIC timer
  1: 43690 XT-PIC i8042
  2: 0 XT-PIC cascade
  5: 298405 XT-PIC ICE1712, Bt87x audio, bttv0,
ohci_hcd:usb2, eth0
  7: 10 XT-PIC parport0
  8: 1 XT-PIC rtc
  9: 0 XT-PIC acpi
 10: 4 XT-PIC ehci_hcd:usb1
 11: 1849056 XT-PIC ohci_hcd:usb3, ohci1394, nvidia
 12: 333945 XT-PIC i8042
 14: 107572 XT-PIC ide0
 15: 183634 XT-PIC ide1
NMI: 0
LOC: 0
ERR: 0
MIS: 0

-- 
Florin Andrei
http://florin.myip.org/
Received on Sun Mar 5 12:15:17 2006

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