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    SubjectRe: [Bug #11308] tbench regression on each kernel release from 2.6.22 -> 2.6.28
    From: Ingo Molnar <>
    Date: Mon, 17 Nov 2008 12:01:19 +0100

    > The scheduler's overhead barely even registers on a 16-way x86 system
    > i'm running tbench on. Here's the NMI profile during 64 threads tbench
    > on a 16-way x86 box with an v2.6.28-rc5 kernel [config attached]:

    Try a non-NMI profile.

    It's the whole of the try_to_wake_up() path that's the problem.

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      Last update: 2008-11-17 20:25    [W:0.020 / U:32.304 seconds]
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