linux-kernel - [tip:perf/core] perf stat report: Process stat and stat round events

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Date:	Fri, 18 Dec 2015 01:13:27 -0800
From:	tip-bot for Jiri Olsa <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	dsahern@...il.com, acme@...hat.com, linux-kernel@...r.kernel.org,
	tglx@...utronix.de, jolsa@...nel.org, kan.liang@...el.com,
	namhyung@...nel.org, hpa@...or.com, mingo@...nel.org,
	a.p.zijlstra@...llo.nl
Subject: [tip:perf/core] perf stat report:
  Process stat and stat round events

Commit-ID:  a56f9390aa9d9b1c782c3dbd5ca2c4245eb265fc
Gitweb:     http://git.kernel.org/tip/a56f9390aa9d9b1c782c3dbd5ca2c4245eb265fc
Author:     Jiri Olsa <jolsa@...nel.org>
AuthorDate: Thu, 5 Nov 2015 15:40:59 +0100
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Thu, 17 Dec 2015 16:29:19 -0300

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@...el.com>
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Cc: David Ahern <dsahern@...il.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/r/1446734469-11352-16-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.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 f9d4e09..d27d1b9 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,
 	},
 };
 
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