[lkml]   [2007]   [Mar]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [ck] Re: [PATCH][RSDL-mm 0/7] RSDL cpu scheduler for 2.6.21-rc3-mm2
    On Mon, 2007-03-12 at 17:38 -0400, michael chang wrote:

    > Perhaps, Mike Galbraith, do you feel that it should be possible to use
    > the CPU at 100% for some task and still maintain excellent
    > interactivity?

    Within reason, yes. Defining "reason" is difficult. As we speak, this
    is possible to a much greater degree than with RSDL. Before anybody
    pipes in, yes, I'm very much aware of the down side of the interactivity
    estimator, I've waged bloody battles with it, and have the t-shirt :)

    > That said, I haven't run the test case in particular yet, although I
    > will see if I can get the time to do so soon. In any case, I
    > personally do have a few qualms about this test case being run on HT
    > virtual cores:

    Virtual or physical cores has nothing to do with the interactivity
    regression I noticed. Two nice 0 tasks which combined used 50% of my
    box can no longer share that box with two nice 5 tasks and receive the
    50% they need to perform. That's it. From there, we wandered off into a
    discussion on the relative merit and pitfalls of fairness.


    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2007-03-13 07:13    [W:0.043 / U:3.376 seconds]
    ©2003-2017 Jasper Spaans. hosted at Digital OceanAdvertise on this site