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    SubjectRe: [patch] voluntary-preempt-2.6.8.1-P4
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    On Thu, 2004-08-19 at 03:32, Ingo Molnar wrote:
    > i've uploaded the -P4 patch:
    >
    > http://redhat.com/~mingo/voluntary-preempt/voluntary-preempt-2.6.8.1-P4

    I think I am seeing those weird ~1 ms latencies still (actually I am not
    sure I saw before now):

    http://krustophenia.net/testresults.php?dataset=2.6.8.1-P4#/var/www/2.6.8.1-P4/kswapd_latency_trace.txt

    This was the result of doing `make -j12' with a large C++ program (I
    know, I wanted to see what would happen). This gradually slowed the
    machine to a crawl - for a while I could watch the /proc/latency_trace
    fiels and see the latency gradually climbing. Eventually tha machine
    ground almost to a halt, with lots of disk activity., and trying to
    switch from X to a console window resulted in a blank screen for 2-3
    minutes. I did eventually get a text console and was able to kill all
    the cc1plus processes, and the machine went back to normal.

    The link above is the highest latency recorded during this episode.

    Lee

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