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    SubjectRe: perf: store and retrieve trace event names in the file
    Frederic Weisbecker wrote:
    > On Sun, Aug 09, 2009 at 04:01:30PM -0700, Arjan van de Ven wrote:
    >> Frederic Weisbecker wrote:
    >>> On Sun, Aug 09, 2009 at 02:49:23PM -0700, Arjan van de Ven wrote:
    >>>> In order to be able to use trace events, a key aspect is the "type" field;
    >>>> this is the id of the event that you recorded, as stored in the /sys/kernel/debug/events/*/*/id file.
    >>>> What is currently missing is a way to map the id number (which is not abi stable)
    >>>> to the event that was recorded.
    >>> We already have that.
    >>> See tools/perf/util/parse-events.c: char *tracepoint_id_to_name(u64 id)
    >> sadly... we don't.
    >> You do it *on the same boot and machine* as you created the file.
    >> You don't have it when you reboot into a new kernel, or move the file
    >> to a new machine........
    >> Which is to be honest a very common usecase.
    > Ah right... I always forget the offline report case.
    > But you can at least reuse this existing helper to resolve
    > the id to name.

    ok I'll unstatic it, move it to a different file and ..

    eh how about not?

    this helper looks up an on disk id/name pair, and is private to it's existing file.

    The other one is based on the perf data, and all that is in header.c instead....

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      Last update: 2009-08-10 01:13    [W:0.021 / U:7.192 seconds]
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