[linux-audio-user] Low latency kernel on Mandrake

Robert Jonsson robert.jonsson at dataductus.se
Sun Nov 2 07:23:09 EST 2003

söndagen den 2 november 2003 12.41 skrev Joe Button:
> Hi.
> I'm confused about whether or not I have a low-latency kernel, and if not
> why not. I installed the multimedia kernel and booted into it but:
> [root at olaf joe]# cat /proc/version
> Linux version 2.4.22-21mm.1mdk (dtholen at klama.mandrake.org) (gcc version
> 3.3.1 (Mandrake Linux 9.2 3.3.1-4mdk)) #1 Tue Oct 28 15:05:18 CET 2003
> [root at olaf joe]# cat /proc/sys/kernel/lowlatency
> cat: /proc/sys/kernel/lowlatency: No such file or directory

I'm not sure exactly which patches the mm kernel has, but it most definitely 
has the lowlatency patch and I'm pretty sure it's got the preemtion patch 

That you are missing the /proc/sys/kernel/lowlatency doesn't mean anything. It 
is selectable in the kernel configuration whether it should show up.
It is related to the lowlatency patch btw.


> Does this definitely mean I don't have low-latency? Any ideas why not?
> Can't identify anything relevant in /var/log/messages.
> Does /proc/sys/kernel/lowlatency relate to the pre-emption patches or
> Andrew Morton's low-latency patches or both or what?
> Thanks for any help.

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