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    SubjectRe: 2.6.9-rc1-mm1
    Date
    On Friday 27 of August 2004 23:54, Rick Lindsley wrote:
    > > Rafael, what baseline release are you comparing to? I should be able
    > > to provide some tools to measure the effect on updatedb directly for
    > > both 2.6.9-rc1 and your baseline (so long as it's 2.6-based)
    >
    > 2.6.8.1, for example. I'd like to compate it with the 2.6.9-rc1-mm1,
    > which contains the Nick's scheduler (2.6.9-rc1 has the same scheduler as
    > 2.6.8.1, AFAIK).
    >
    > Okay. A schedstats patch for 2.6.8.1 is available at
    >
    > http://eaglet.rain.com/rick/linux/schedstat/patches/schedstat-2.6.8.1
    > or
    > http://oss.software.ibm.com/linux/patches/?patch_id=730
    >
    > You can also pick up the program "latency.c" at
    >
    > http://eaglet.rain.com/rick/linux/schedstat/v9/latency.c
    >
    > With these two things in hand, you should be able to measure the latency
    > on 2.6.8.1 of a particular process.
    >
    > A patch is not necessary for 2.6.9-rc1-mm1 (schedstats is already in there)
    > but you will need to config the kernel to use it. Then retrieve a slightly
    > different latency.c:
    >
    > http://eaglet.rain.com/rick/linux/schedstat/v10/latency.c
    >
    > since 2.6.9-rc1-mm1 output format is different (as you noted, it's a
    > different scheduler.) Then you should be able to see if the latency of
    > a particular process (updatedb, for instance) changes.

    Thanks a lot Rick, I'll give it a try tomorrow.

    Regards,
    RJW

    --
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    -- Richard P. Feynman
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