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    SubjectRe: [patch] voluntary-preempt-
    Lee Revell wrote:
    > On Sat, 2004-08-21 at 10:05, Ingo Molnar wrote:
    >>i've uploaded the -P7 patch:
    >>Changes since -P6:
    >>- fixed the XFree86/ 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:
    > Lee

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

    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.


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