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    Subject[PATCH v3 0/4] ftrace: add tracepoint for timer event
    Hi,

    We can monitor timer's lifecycle and behaviors by these tracepoint.

    Following tracepoints are introduced as ingo's suggestion in
    http://marc.info/?l=linux-kernel&m=123791899529128&w=2

    for timer:
    trace_timer_init()
    trace_timer_start()
    trace_timer_expire()
    trace_timer_cancel()

    for hrtimer:
    trace_hrtimer_init()
    trace_hrtimer_start()
    trace_hrtimer_expire()
    trace_hrtimer_cancel()

    for itimer:
    itimer_state
    itimer_expire()

    Changlog from latest patchset:
    1: ours patches are base on Anton Blanchard's patch which can been found
    at:
    http://marc.info/?l=linux-kernel&m=124331396919301&w=2
    but this patch is can't apply on Ingo's tip tree, so we rebase this
    patch against latest tip tree

    2: fix those patches address Thomas's comment


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