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    SubjectRe: an idling kernel
    Anu wrote:
    > Im ready to be beaten up for asking this question ( I am not sure
    > which group to post to -- all this is new to me) but, I was wondering how
    > one could figure out if the kernel was in idle mode (or idling).

    There's more to is than just processes: if your kernel has runnable
    tasklets or pending interrupts, it is not truly idle, even though
    there may be no runnable processes.

    In umlsim, I have some heuristics that seem to catch most cases, but
    may be a bit too paranoid. Look at timer.c:wait_kernel (called from
    idle) in

    - Werner

    / Werner Almesberger, Buenos Aires, Argentina /
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