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    Subject[RFC PATCHSET v2] Implement --switch-output-event
    Date
    Hi guys,

    Please consider reviewing, this addresses comments by Jiri in
    the V1.

    Again, the example provided is too simple, using 'perf probe' to
    put probes in specific places in some workload to then get any other
    event close to the time the trigger hits comes to mind as well, using
    the signal was just to reuse the pre-existing logic and keep the
    patchkit small.

    One other thing that occurred to me while testing is that this
    can be combined with 'perf report/perf script' --switch-off option:

    $ perf report -h --switch-off

    Usage: perf report [<options>]

    --switch-off <event>
    Stop considering events after the ocurrence of this event

    $

    To remove from consideration the events that end up being
    recorded in the ring buffer after the --switch-output-event but gets in
    the ring buffer because we process the --switch-output-event
    asynchronously.

    Its available at:

    git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git perf/switch-output-event

    Best regards,

    - Arnaldo


    Arnaldo Carvalho de Melo (8):
    perf record: Move sb_evlist to 'struct record'
    perf top: Move sb_evlist to 'struct perf_top'
    perf bpf: Decouple creating the evlist from adding the SB event
    perf parse-events: Add parse_events_option() variant that creates evlist
    perf evlist: Allow reusing the side band thread for more purposes
    libsubcmd: Introduce OPT_CALLBACK_SET()
    perf record: Introduce --switch-output-event
    perf record: Move side band evlist setup to separate routine

    tools/lib/subcmd/parse-options.h | 2 +
    tools/perf/Documentation/perf-record.txt | 13 ++++
    tools/perf/builtin-record.c | 75 ++++++++++++++++++++----
    tools/perf/builtin-top.c | 20 +++++--
    tools/perf/util/bpf-event.c | 3 +-
    tools/perf/util/bpf-event.h | 7 +--
    tools/perf/util/evlist.c | 39 +++++++-----
    tools/perf/util/evlist.h | 3 +-
    tools/perf/util/parse-events.c | 23 ++++++++
    tools/perf/util/parse-events.h | 1 +
    tools/perf/util/top.h | 2 +-
    11 files changed, 151 insertions(+), 37 deletions(-)

    --
    2.21.1

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