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    Subject[PATCH 41/43] perf stat report: Process stat and stat round events
    Date
    From: Jiri Olsa <jolsa@kernel.org>

    Adding processing of stat and stat round events.

    The stat data com in stat events, using generic function
    process_stat_round_event to store data under perf_evsel object.

    The stat-round events comes each interval or as last event in non
    interval mode. The function process_stat_round_event process stored data
    for each perf_evsel object and print it out.

    Committer note:

    After this patch:

    $ perf stat record usleep 1

    Performance counter stats for 'usleep 1':

    0.498381 task-clock (msec) # 0.571 CPUs utilized
    2 context-switches # 0.004 M/sec
    0 cpu-migrations # 0.000 K/sec
    149 page-faults # 0.299 M/sec
    1,271,635 cycles # 2.552 GHz
    928,712 stalled-cycles-frontend # 73.03% frontend cycles idle
    663,286 stalled-cycles-backend # 52.16% backend cycles idle
    792,614 instructions # 0.62 insns per cycle
    # 1.17 stalled cycles per insn
    136,850 branches # 274.589 M/sec
    <not counted> branch-misses (0.00%)

    0.000873419 seconds time elapsed

    $
    $ perf stat report

    Performance counter stats for '/home/acme/bin/perf stat record usleep 1':

    0.498381 task-clock (msec) # 0.571 CPUs utilized
    2 context-switches # 0.004 M/sec
    0 cpu-migrations # 0.000 K/sec
    149 page-faults # 0.299 M/sec
    1,271,635 cycles # 2.552 GHz
    928,712 stalled-cycles-frontend # 73.03% frontend cycles idle
    663,286 stalled-cycles-backend # 52.16% backend cycles idle
    792,614 instructions # 0.62 insns per cycle
    # 1.17 stalled cycles per insn
    136,850 branches # 274.589 M/sec
    <not counted> branch-misses (0.00%)

    0.000873419 seconds time elapsed

    $

    Reported-by: Kan Liang <kan.liang@intel.com>
    Signed-off-by: Jiri Olsa <jolsa@kernel.org>
    Cc: David Ahern <dsahern@gmail.com>
    Cc: Namhyung Kim <namhyung@kernel.org>
    Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
    Link: http://lkml.kernel.org/r/1446734469-11352-16-git-send-email-jolsa@kernel.org
    Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
    ---
    tools/perf/builtin-stat.c | 28 ++++++++++++++++++++++++++++
    1 file changed, 28 insertions(+)

    diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
    index f9d4e0963ac7..d27d1b921efa 100644
    --- a/tools/perf/builtin-stat.c
    +++ b/tools/perf/builtin-stat.c
    @@ -1628,6 +1628,32 @@ static int __cmd_record(int argc, const char **argv)
    return argc;
    }

    +static int process_stat_round_event(struct perf_tool *tool __maybe_unused,
    + union perf_event *event,
    + struct perf_session *session)
    +{
    + struct stat_round_event *round = &event->stat_round;
    + struct perf_evsel *counter;
    + struct timespec tsh, *ts = NULL;
    + const char **argv = session->header.env.cmdline_argv;
    + int argc = session->header.env.nr_cmdline;
    +
    + evlist__for_each(evsel_list, counter)
    + perf_stat_process_counter(&stat_config, counter);
    +
    + if (round->type == PERF_STAT_ROUND_TYPE__FINAL)
    + update_stats(&walltime_nsecs_stats, round->time);
    +
    + if (stat_config.interval && round->time) {
    + tsh.tv_sec = round->time / NSECS_PER_SEC;
    + tsh.tv_nsec = round->time % NSECS_PER_SEC;
    + ts = &tsh;
    + }
    +
    + print_counters(ts, argc, argv);
    + return 0;
    +}
    +
    static
    int process_stat_config_event(struct perf_tool *tool __maybe_unused,
    union perf_event *event,
    @@ -1713,6 +1739,8 @@ static struct perf_stat perf_stat = {
    .thread_map = process_thread_map_event,
    .cpu_map = process_cpu_map_event,
    .stat_config = process_stat_config_event,
    + .stat = perf_event__process_stat_event,
    + .stat_round = process_stat_round_event,
    },
    };

    --
    2.1.0


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