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List:       linux-kernel
Subject:    Re: [patch] voluntary-preempt-2.6.8.1-P5
From:       Lee Revell <rlrevell () joe-job ! com>
Date:       2004-08-21 9:23:22
Message-ID: 1093080202.854.94.camel () krustophenia ! net
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On Sat, 2004-08-21 at 05:18, Ingo Molnar wrote:
> * Lee Revell <rlrevell@joe-job.com> wrote:
> 
> > > > http://krustophenia.net/testresults.php?dataset=2.6.8.1-P6#/var/www/2.6.8.1-P6/trace8.txt
> > > 
> > > i suspect if you turn off tracing (or disable it in the kernel
> > > completely) then you'd see below-100 usec latencies here. A trace entry
> > > costs ~0.3 usecs on your box, so this 50-entry trace has roughly 15
> > > usecs of tracing overhead :-)
> > > 
> > 
> > FWIW, I did see one of these over 200 usecs.
> 
> which trace is this?
> 

Sorry, I was thinking of this one:

http://krustophenia.net/testresults.php?dataset=2.6.8.1-P6#/var/www/2.6.8.1-P6/trace10.txt

Lee

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