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    SubjectRe: [RFT] 2.2.8_andrea1 wake-one [Re: Overscheduling DOES happen with high web server load.]
    Andrea,
    I will take a look at it this morning and get back to you.

    --Phil

    Digital/Compaq: HPSD/Benchmark Performance Engineering
    Phillip.Ezolt@compaq.com ezolt@perf.zko.dec.com


    On Wed, 12 May 1999, Andrea Arcangeli wrote:

    > On Fri, 7 May 1999, Andrea Arcangeli wrote:
    >
    > >I'll provide you a patch shortly to try out.
    >
    > Phillip, could you try it out:
    >
    > ftp://e-mind.com/pub/andrea/kernel/2.2.8_andrea1.bz2
    >
    > under heavy web load? (should run fine on alpha too as far as stock-2.2.8
    > is just fine too)
    >
    > Note: it has also my wake-one on accept that just address completly the
    > overscheduling problem. But to achieve performances by it you must make
    > sure that _all_ apache tasks are sleeping in accept(2) and not in
    > flock(2)/fcntl(2)/whatever. Maybe you'll need to patch apache to achieve
    > that (I also seen a patch floating on the list, maybe you only need to
    > grap such patch and apply/reverse it over the apache tree).
    >
    > I would like if you would make comparison with a clean 2.2.8 (or with
    > pre-2.3.1 even if I have not seen it yet).
    >
    > Andrea Arcangeli
    >
    >
    >


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