[linux-audio-user] Re: [Jackit-devel] What is a 'delay exceeds' vs. and xrun - BIG MISSES - AND SOLUTIONS!

[Mark Knecht]

Fernando Pablo Lopez-Lezcano wrote:
> 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
> 

At -p4 I just get messages about the Jack watchdog timer timing out.

This is all getting pretty silly down that low. No reason I know of to 
do it other then to test the limits of these new kernels.