Messages in this thread | | | Date | Sat, 21 Aug 2004 11:13:38 +0200 | From | Ingo Molnar <> | Subject | Re: [patch] voluntary-preempt-2.6.8.1-P5 |
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* 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 :-)
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