Messages in this thread |  | | Subject | Re: [patch] voluntary-preempt-2.6.8.1-P5 | | From | Lee Revell <> | | Date | Sat, 21 Aug 2004 05:15:27 -0400 |
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On Sat, 2004-08-21 at 05:13, Ingo Molnar wrote: > * Lee Revell <rlrevell@joe-job.com> wrote: > > > On Fri, 2004-08-20 at 09:30, Ingo Molnar wrote: > > > > > - reduce ZAP_BLOCK_SIZE to 16 when vp != 0. This pushes the exit > > > latency down to below 100 usecs on Lee Revell's box. > > > > > > > Almost: > > > > 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.
Lee
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