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    Subject[PATCH 18/25] perf report: Add --group option
    Date
    From: Namhyung Kim <namhyung.kim@lge.com>

    Add --group option to enable event grouping. When enabled, all the
    group members information will be shown together with the leader.

    $ perf report --group
    ...
    # group: {ref-cycles,cycles}
    # ========
    #
    # Samples: 7K of event 'anon group { ref-cycles, cycles }'
    # Event count (approx.): 6876107743
    #
    # Overhead Command Shared Object Symbol
    # ................ ....... ................. ..........................
    #
    99.84% 99.76% noploop noploop [.] main
    0.07% 0.00% noploop ld-2.15.so [.] strcmp
    0.03% 0.00% noploop [kernel.kallsyms] [k] timerqueue_del
    0.03% 0.03% noploop [kernel.kallsyms] [k] sched_clock_cpu
    0.02% 0.00% noploop [kernel.kallsyms] [k] account_user_time
    0.01% 0.00% noploop [kernel.kallsyms] [k] __alloc_pages_nodemask
    0.00% 0.00% noploop [kernel.kallsyms] [k] native_write_msr_safe
    0.00% 0.11% noploop [kernel.kallsyms] [k] _raw_spin_lock
    0.00% 0.06% noploop [kernel.kallsyms] [k] find_get_page
    0.00% 0.02% noploop [kernel.kallsyms] [k] rcu_check_callbacks
    0.00% 0.02% noploop [kernel.kallsyms] [k] __current_kernel_time

    Signed-off-by: Namhyung Kim <namhyung@kernel.org>
    Acked-by: Jiri Olsa <jolsa@redhat.com>
    Cc: Ingo Molnar <mingo@kernel.org>
    Cc: Jiri Olsa <jolsa@redhat.com>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Cc: Stephane Eranian <eranian@google.com>
    Link: http://lkml.kernel.org/r/1358845787-1350-18-git-send-email-namhyung@kernel.org
    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
    ---
    tools/perf/Documentation/perf-report.txt | 3 +++
    tools/perf/builtin-report.c | 2 ++
    2 files changed, 5 insertions(+)

    diff --git a/tools/perf/Documentation/perf-report.txt b/tools/perf/Documentation/perf-report.txt
    index 848a0dc..02284a0 100644
    --- a/tools/perf/Documentation/perf-report.txt
    +++ b/tools/perf/Documentation/perf-report.txt
    @@ -203,6 +203,9 @@ OPTIONS
    --objdump=<path>::
    Path to objdump binary.

    +--group::
    + Show event group information together.
    +
    SEE ALSO
    --------
    linkperf:perf-stat[1], linkperf:perf-annotate[1]
    diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
    index ce518c4..9ef3842 100644
    --- a/tools/perf/builtin-report.c
    +++ b/tools/perf/builtin-report.c
    @@ -668,6 +668,8 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
    "Specify disassembler style (e.g. -M intel for intel syntax)"),
    OPT_BOOLEAN(0, "show-total-period", &symbol_conf.show_total_period,
    "Show a column with the sum of periods"),
    + OPT_BOOLEAN(0, "group", &symbol_conf.event_group,
    + "Show event group information together"),
    OPT_CALLBACK_NOOPT('b', "branch-stack", &sort__branch_mode, "",
    "use branch records for histogram filling", parse_branch_mode),
    OPT_STRING(0, "objdump", &objdump_path, "path",
    --
    1.8.1.1.361.gec3ae6e


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