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    SubjectRe: How is user space notified of CPU speed changes?
    On Sat, 2004-10-23 at 01:10 -0400, Lee Revell wrote:

    > OK, thanks. Still no answer to my original question though.
    > JACK makes extensive use of microsecond-level timers. These must be
    > calibrated at startup, and recalibrated when the CPU speed changes. How
    > does JACK register with the kernel to be notified when the CPU speed
    > changes?

    Ignoring all of these meta-issues like whether or not JACK actually
    should be checking the CPU speed: Yes, I think that doing a kevent tied
    to the processor object when the speed changes is an absolutely ideal
    use of the kernel event layer.

    HAL would use it, too.

    Robert Love

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