Commit a56f9390 authored Nov 05, 2015 by Jiri Olsa Committed by Arnaldo Carvalho de Melo Dec 17, 2015

perf stat report: Process stat and stat round events



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>

parent 6edb78a2

tools/perf/builtin-stat.c

+28 −0

Original line number	Diff line number	Diff line
		@@ -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,
		},
		};