[ardour-dev] Re: Beta 28 from CVS mtc??

Fernando Lopez-Lezcano nando at ccrma.Stanford.EDU
Tue Mar 29 18:01:30 PST 2005

On Tue, 2005-03-29 at 13:16, Geoff Beasley wrote:
> Thanks for all the help so far! Just checked rtirq, on all the computers the
> soundcards were on the second highest priority (70) and IRQ 8 had the
> highest. The soundcards were on IRQ 10.
> Anything else to look for?

At what priority are you running jack?
It should be a little less than the priority of the soundcard interrupt.
-- Fernando

> -----Original Message-----
> From: ardour-dev-ardour.org-bounces at lists.ardour.org
> [mailto:ardour-dev-ardour.org-bounces at lists.ardour.org] On Behalf Of
> Fernando Lopez-Lezcano
> Sent: Wednesday, March 30, 2005 5:43 AM
> To: David Mulcahy
> Cc: ardour-dev at lists.ardour.org; ardour-dev-ardour.org at lists.ardour.org
> Subject: Re: [ardour-dev] Re: Beta 28 from CVS mtc??
> On Tue, 2005-03-29 at 05:33, David Mulcahy wrote:
> > Hello 
> > I might be out of my depth a bit here but just a suggestion.  I remember 
> > reading that you have to prioritise the irq of your soundcard to get low 
> > latency (with some settings eg preempt desktop or realtime) on a 2.6
> kernel.  
> > Now I dont use CCRMA so i dont know if that is setup to work like that out
> > the box. 
> It is (ahem, should be :-)
> It uses the rtirq script that Rui Nuno Capela wrote. 
> Anyway, if there are problems with latency and/or timing I would first
> check that priorities are being ordered correctly (run
> /etc/rc.d/init.d/rtirq status to know the current status). 
> -- Fernando

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