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    SubjectRe: [PATCH] O11int for interactivity
    William Lee Irwin III wrote:
    >> Well, I was vaguely hoping a useful way to instrument the io stuff
    >> would already be out there.

    On Tue, Aug 05, 2003 at 01:23:08PM +1000, Nick Piggin wrote:
    > Not really.
    > For a process doing blocking reads you could measure the time
    > from when a process submits a read to when it gets the result.
    > I suppose you also need some minimum rate too but I really can't
    > see that being the problem here.

    I'm at least aware of patches for 2.4.x that log io scheduling
    decisions in the driver, which is basically what I was hoping for.

    On a higher level, are you thinking there's some indication the
    io schedulers themselves aren't involved? Or that something higher-
    level should be instrumented? If so, what?


    -- wli
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