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    SubjectRe: [BUG] Strange 1-second pauses during Resume-from-RAM

    * Jörn Engel <joern@logfs.org> wrote:

    > On Fri, 30 November 2007 14:43:12 +0100, Ingo Molnar wrote:
    > >
    > > http://redhat.com/~mingo/latency-tracing-patches/latency-tracing-v2.6.24-rc3.combo.patch
    > >
    > > does it work any better?
    >
    > It compiles. It boots with a 512M RAM (384M was too little with all
    > the other debug options on). But it seems to lock up when running
    > trace-cmd. On a rerun it locks up again, but with different output.

    hm, you should decrease MAX_TRACE in kernel/latency_tracing.c from 1
    million to 16K or so. 1 million entries probably depletes lowmem quite
    seriously.

    > Rerun was captured:
    > http://logfs.org/~joern/trace1.jpg

    hm, that looks weird. if you disable CONFIG_PROVE_LOCKING, does that
    improve things? (or just turns a noisy lockup into a silent lockup?)

    > I should do a couple of runs, but my girlfriend claims realtime
    > priority for the evening.

    yeah, SCHED_IDLE is not generally well received by them.

    Ingo
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