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    SubjectRe: How how latent should non-preemptive scheduling be?
    Ingo Molnar wrote:
    > well, since they went away after you enabled CONFIG_PREEMPT=y, they are
    > definitely in-kernel latencies, not any external SMM latencies.
    >
    > I.e. they are inherently fixable. Could you enable:
    >
    > CONFIG_DYNAMIC_FTRACE=y
    > CONFIG_FTRACE_MCOUNT_RECORD=y
    >
    > that should make the traces a lot more verbose - every kernel function
    > executed in the latency path will be logged. That way we'll be able to
    > say which one takes that long.

    I do not appear to have the CONFIG_FTRACE_MCOUNT_RECORD option in
    2.6.27rc7. Is it an option that is only in -tip ?

    --
    Sitsofe | http://sucs.org/~sits/


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