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    SubjectRe: ext3 IO latency measurements (was: Linux 2.6.29)
    On Thu, 26 Mar 2009 12:08:15 +0100
    Jens Axboe <> wrote:
    > Did you capture the trace of the long delays in the read test case? It
    > can be two things, at least. One is that each little read takes much
    > longer than it should, the other is that we get stuck waiting on a
    > dirty page and hence that slows down the reads a lot.

    would be interesting to run latencytop during such runs...

    Arjan van de Ven Intel Open Source Technology Centre
    For development, discussion and tips for power savings,

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