[PlanetCCRMA] [Low latency patches] Voluntary Preempt vs. Staircase+mappedwatermark

[Kjetil Svalastog Matheussen]

On Fri, 3 Sep 2004, Mark Knecht wrote:

> Kjetil Svalastog Matheussen wrote:
> > On Thu, 2 Sep 2004, Arthur Sosa wrote:
> > 
> > 
> >>I thought it would not be possible to run jack on my system like this:
> >>
> >># jackd -Rv -d alsa -p 128 -n 3 -r 44100
> >>
> >>But I just tried Con Kolivas' patches (ck5 with kernel 2.8.6.1)
> >>( adding the _important_ latest little patch
> >>   http://ck.kolivas.org/patches/2.6/2.6.8.1/2.6.8.1-ckdev/lenient_uw.diff )
> >>
> >>and I see _no more xruns_ even under heavy loads!!!  It's incredible!
> >>
> >>
> >>Fernando, I tried the new kernels with voluntary preemption, but they
> >>perform _very_ bad . I must learn the way how to find out the reasons.
> >>
> > 
> > 
> > I just have to ask... When using the voluntary preemption patch, did 
> > you turn off interrupt threading for the soundcard?
> > 
> > 
> 
> I'd like to ask if there is a set of written instructions for building 
> this kernel? I'd like to try it out.
> 

I think Florian Schmidt's 2.6 wiki is very nice:
http://www.affenbande.org/~tapas/wiki/index.php?Low%20latency%20for%20audio%20work%20on%20linux%202.6.x


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