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Subject: Re: [patch] voluntary-preempt-2.6.8-rc3-O5
From: Lee Revell <rlrevell@joe-job.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: Florian Schmidt <mista.tapas@gmx.net>,
       linux-kernel <linux-kernel@vger.kernel.org>,
       Felipe Alfaro Solana <felipe_alfaro@linuxmail.org>,
       jackit-devel <jackit-devel@lists.sourceforge.net>,
       Paul Davis <paul@linuxaudiosystems.com>
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On Thu, 2004-08-12 at 03:21, Ingo Molnar wrote:
> * Lee Revell <rlrevell@joe-job.com> wrote:
> 
> > There is definitely some subtle bug in the preempt-timing patch,
> > because I am getting reports of long non-preemptible sections, which
> > do not correspond to an xrun in jackd - if these were real then even a
> > 400usec non-preemptible section would cause an xrun.  I do not seem to
> > get many xruns during normal jackd operation.
> 
> could you send me these latest preempt-timing warnings?
> 

Here are all the XRUN traces and preempt-timing warnings for the last
~24 hours.  I still have not had a chance to test with the latest
patches & config changes.

http://krustophenia.net/2.6.8-rc3-O5/kern.log.txt

Here are some graphs from other test runs:

http://krustophenia.net/testresults.php?dataset=2.6.8-rc3-O5
http://krustophenia.net/testresults.php?dataset=2.6.8-rc2-mm2-O3

For reference here's an -mm kernel without the voluntary-preempt
patches:

http://krustophenia.net/testresults.php?dataset=2.6.8-rc3-mm2

Source code for the php script:

http://krustophenia.net/testresults.phps

I based the php script on this perl script: 

http://www.oddmuse.org/cgi-bin/oddmuse/GnuPlot_Extension

The web server is my desktop machine, so please don't complain if it
becomes unavailable without warning.  I will try to keep the links
working.

Lee