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    SubjectRe: [PATCH 0/5] Proper kernel irq time reporting -v0
    On 10/20/2010 05:48 PM, Venkatesh Pallipadi wrote:
    > This is part 2 of
    > "Proper kernel irq time accounting -v4"
    > and applies over those changes.

    I applied both sets on top of 2.6.36 and tested on x86 32-bit and 64-bit
    machines with some telephony cards that interrupt at a 1000Hz rate. The
    time reported in top matched the expected value as measured with the
    function graph tracer. i.e, if /sys/kernel/debug/tracing/trace
    indicated that the interrupt handler was averaging 13us, then top was
    reporting 1.3% CPU time. I changed the smp_affinity and the "hi" time
    moved around as I would have expected. I also scheduled work items on
    all the CPUs that just disable interrupt and spin for a selectable
    period. Scheduling 100ms of non-interruptible delay at 1 second
    intervals resulted in 10% time in "hi" as expected.

    Hopefully I can check it out on a Powermac G3 B&W next week sometime,
    but FWIW:

    Tested-by: Shaun Ruffell <>

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