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    SubjectRe: [patch] voluntary-preempt-2.6.8.1-P7
    Lee Revell wrote:
    > On Sat, 2004-08-21 at 10:05, Ingo Molnar wrote:
    >
    >>i've uploaded the -P7 patch:
    >>
    >> http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8.1-P7
    >>
    >>Changes since -P6:
    >>
    >>- fixed the XFree86/X.org context-switch latency. (let me know if you
    >> see any weirdness like X not starting up while it did before.)
    >>
    >>- halved the pagevec size, to reduce the radix gang-lookup costs.
    >>
    >
    >
    > Great, this is a significant improvement. Most of the worst case
    > latencies (~150 usec) seem related to the TCP stack now, and a minor one
    > (51 usec) in the ext3 journaling:
    >
    > http://krustophenia.net/testresults.php?dataset=2.6.8.1-P7
    >
    > Lee
    >

    I just posted a similar trace of ~4141 usec from P6 here:

    http://www.cybsft.com/testresults/2.6.8.1-P6/latency-trace1.txt

    This was part of a run from yesterday evening. After just rebooting, I
    too am seeing several of these. With the system not being hammered by
    the stress tests though, the max is only up to ~103 usec. I will be
    updating to P7 shortly.

    kr

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