[linux-audio-dev] Re: [Jackit-devel] [REQUEST] test the influence of linux1394 kernel drivers on scheduling latency

[Lee Revell]

On Wed, 2006-06-21 at 00:21 +0200, Pieter Palmers wrote:
> Hi all,
> 
> This weekend I've discovered a (serious) kernel scheduling latency issue 
> with the current ieee1394 kernel drivers. Before I submit something 
> about this to lkml, I'd like some more tests. I've been able to 
> reproduce this on two different machines, so I suspect that this is a 
> more general problem.
> 
> The problem summary is that running ieee1394 ISO traffic can cause 
> scheduling latency spikes up to 1ms, even for RT threads with higher 
> priority.
> 

Latency tracer output please?

Use 2.6.16 with this patch:

http://people.redhat.com/mingo/latency-tracing-patches/latency-tracing-v2.6.16.patch

Lee