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    SubjectRe: [patch] voluntary-preempt-2.6.8.1-P5

    * 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 :-)

    Ingo
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