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    SubjectRe: Terrible interactivity with 2.6.0-t9-mm3
    On Sunday 16 November 2003 21:49, Andrew Morton wrote:
    >Gawain Lynch <> wrote:
    >> On Mon, 2003-11-17 at 08:42, Andrew Morton wrote:
    >> > Two things to try, please:
    >> >
    >> > a) Is the problem from Linus's tree? Try 2.6.0-test9 plus
    >> >
    >> >.6.0-test9/2.6.0-test9-mm3/broken-out/linus.patch
    >> >
    >> > b) The only significant scheduler change in mm3 was
    >> >
    >> >.6.0-test9/2.6.0-test9-mm3/broken-out/context-switch-accounting-f
    >> >ix.patch
    >> >
    >> > So please try -mm3 with the above patch reverted with
    >> >
    >> > patch -R -p1 < context-switch-accounting-fix.patch
    >> Hi Andrew,
    >> This is also easily reproducible here with just a kernel compile.
    >> I have tried both a) and b) with b) not changing anything, but a)
    >> seems to work... Anything more to try?
    >Your report has totally confused me. Are you saying that the
    > jerkiness is caused by linus.patch? Or not? Pleas try again ;)

    In defense of this code, I ran -mm3 with the deadline elevator for
    about 3 days and was very happy with the interactivity. Now I've
    been running with the elevator=cfq for most of the day, and it also
    seems to be pretty responsive. The default as wasn't, at least for
    -mm2, and I haven't tried it yet for -mm3. Should I, and report back
    in a day or so so that you've got reports from an otherwise identical
    system to compare?

    We need a test suite for this :)

    Cheers, Gene
    AMD K6-III@500mhz 320M
    Athlon1600XP@1400mhz 512M
    99.27% setiathome rank, not too shabby for a WV hillbilly attornies please note, additions to this message
    by Gene Heskett are:
    Copyright 2003 by Maurice Eugene Heskett, all rights reserved.

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