Subject: Re: [linux-audio-user] Re: [Jackit-devel] What is a 'delay exceeds' vs. and xrun - BIG MISSES - AND SOLUTIONS!
From: Fernando Pablo Lopez-Lezcano (nando_AT_ccrma.stanford.edu)
Date: Thu Oct 07 2004 - 00:31:16 EEST
On Wed, 2004-10-06 at 14:09, Paul Winkler wrote:
> On Wed, Oct 06, 2004 at 12:01:43PM -0700, Mark Knecht wrote:
> > Hi all,
> > OK, Last evening and this morning I have made good headway. It
> > appears that the main culprit was ACPI support, or some part of it.
> > With most of the ACPI stuff now disabled in the kernel build I am able
> > to run jack with no clients attached, as a root or user with the lsm
> > module modprobed, at p=8, n=2 for over 1 hour with no xruns. If my
> > calculations are correct this would be a latency of less than 0.5mS!
>
> p=8??? good lord. I'd like to see you try that with any real apps :-)
> I'm happy if I can get 128, would like to get down to 64 reliably...
If he tries to go any further he'll have to hack the hardware, most
probably that's getting close to the minimum transfer size on the pci
buss, right?
-- Fernando
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