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    SubjectRe: [PATCH 3/4] trace: add ability to collect call chain of non-current task.
    On 12/15/11 11:08 AM, Arun Sharma wrote:

    > I still need to investigate why per-process mode (command line without
    > -a) doesn't work. Will send an updated patch once that's fixed.

    The per-process mode works fine after moving the trace point to be after:

    perf_event_task_sched_in(prev, current);

    App developers using this feature here say they're fine not having the
    block vs sleep distinction because they intend to use it with "-g" and
    the callstack makes it obvious which one it was.

    If we really need this info, we should be able to derive it in user
    space via perf inject.


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