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    SubjectRe: Latency data - 2.6.14-rc3-rt13

    * Mark Knecht <> wrote:

    > > ( softirq-timer/0-3 |#0): new 3997 us maximum-latency critical section.
    > So the root cause of this 4mS delay is the 250Hz timer. If I change
    > the system to use the 1Khz timer then the time in this section drops,
    > as expected, to 1mS.

    this was a bug in the critical-section-latency measurement code of x64.
    The timer irq is the one that leaves userspace running for the longest
    time, between two kernel calls.

    I have fixed these bugs in -rc4-rt1, could you try it? It should report
    much lower latencies, regardless of PM settings.

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      Last update: 2005-10-11 13:19    [W:0.023 / U:157.672 seconds]
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