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    SubjectRe: [CFT][PATCH] new scheduler policy
    On Fri, 22 Aug 2003 23:08:40 +1000, Nick Piggin wrote:
    > >I timed a pathological benchmark from hell I've been playing with lately.
    > >Three consecutive runs following a fresh boot. Time is in seconds:
    > >
    > >2.4.21 821 21 25
    > >2.6.0-test3-mm1 724 946 896
    > >2.6.0-test3-mm1-nick 905 987 997
    > >
    > >Runtime with ideal scheduling: < 2 seconds (we're thrashing).
    > >
    >
    > Cool. Can you post the benchmark source please?

    http://hellgate.ch/code/ploc/thrash.c

    A parallel kernel build can generate some decent thrashing, too, but I
    wanted a short and simple test case that conveniently provides the
    information I need for both logging daemon and post processing tool.

    Note: The benchmark could trivially be made more evil which would prevent
    2.4.21 from finishing over 30 times faster (as it often does). I
    intentionally left it they way it is.

    While everybody seems to be working on interactivity, I am currently
    looking at this corner case. This should be pretty much orthogonal to your
    own work.

    Roger
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