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    SubjectRe: Re: [PATCH v4 2/3] Support for perf to probe into SDT markers:
    (2013/10/26 18:50), Ingo Molnar wrote:
    >
    > * Srikar Dronamraju <srikar@linux.vnet.ibm.com> wrote:
    >
    >> Hi Pekka,
    >>
    >>>>
    >>>> You can now use it in all perf tools, such as:
    >>>>
    >>>> perf record -e libc:my_event -aR sleep 1
    >>>
    >>> Is there a technical reason why 'perf list' could not show all the
    >>> available SDT markers on a system and that the 'market to event'
    >>> mapping cannot happen automatically?
    >>>
    >>
    >> Technically feasible. But then we would have to parse each of the
    >> libraries and executables to list them. Right? I am not sure if
    >> such a delay is acceptable.
    >
    > I'd say lets try Pekka's suggestion and make it more palatable if
    > there's complaints about the delay. (SSD systems are becoming
    > dominant and there the search should be reasonably fast.)
    >
    > We could also make 'perf list' more sophisticated, if invoked
    > naively as 'perf list' then maybe it should first display the
    > various event categories, with a (rough) count:
    >
    > $ perf list
    > 34 hardware events # use 'perf list --hw' to list them
    > 40 hw-cache events # use 'perf list --cache' to list them
    > 20 software events # use 'perf list --sw' to list them
    > 2 raw events # use 'perf list --raw' to list them
    > 120 tracepoints # use 'perf list --tp' to list them
    > >10 SDT tracepoints # use 'perf list --sdt' to list them
    >
    > # use 'perf list -a' to list all events
    > # use 'perf list ./binary' to list events in a given binary
    >
    > I.e. bring a bit more structure into it.

    Ah, that's nice to me too ;)

    Thank you,

    --
    Masami HIRAMATSU
    IT Management Research Dept. Linux Technology Center
    Hitachi, Ltd., Yokohama Research Laboratory
    E-mail: masami.hiramatsu.pt@hitachi.com




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