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    SubjectRe: (ondemand) CPU governor regression between 2.6.23 and 2.6.24
    On Sat, 26 Jan 2008 15:06:25 +0100 Toralf Förster <toralf.foerster@gmx.de> wrote:

    > I use a 1-liner for a simple performance check : "time factor 819734028463158891"
    > Here is the result for the new (Gentoo) kernel 2.6.24:
    >
    > With the ondemand governor of the I get:
    >
    > tfoerste@n22 ~/tmp $ time factor 819734028463158891
    > 819734028463158891: 3 273244676154386297
    >
    > real 0m32.997s
    > user 0m15.732s
    > sys 0m0.014s
    >
    > With the ondemand governor the CPU runs at 600 MHz,
    > whereas with the performance governor I get :
    >
    > tfoerste@n22 ~/tmp $ time factor 819734028463158891
    > 819734028463158891: 3 273244676154386297
    >
    > real 0m10.893s
    > user 0m5.444s
    > sys 0m0.000s
    >
    > (~5.5 sec as I expected) b/c the CPU is set to 1.7 GHz.
    >
    > The ondeman governor of previous kernel versions however automatically increased
    > the CPU speed from 600 MHz to 1.7 GHz.
    >
    > My system is a ThinkPad T41, I'll attach the .config
    >

    Let's cc the cpufreq list.

    If nothing happens (often the case), please raise a report at
    bugzilla.kernel.org so we can track the presence of the regression.

    Thanks.

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