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From: Arnaldo Carvalho de Melo <acme@kernel.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org, Jiri Olsa <jolsa@redhat.com>,
	Jiri Olsa <jolsa@kernel.org>, David Ahern <dsahern@gmail.com>,
	Namhyung Kim <namhyung@kernel.org>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>,
	Arnaldo Carvalho de Melo <acme@redhat.com>
Subject: [PATCH 11/18] perf stat: Add -a as default target
Date: Mon, 20 Feb 2017 16:08:32 -0300	[thread overview]
Message-ID: <20170220190839.3928-12-acme@kernel.org> (raw)
In-Reply-To: <20170220190839.3928-1-acme@kernel.org>

From: Jiri Olsa <jolsa@redhat.com>

Boris asked for default -a option in case we monitor only uncore events.

While implementing that I thought it might be actually useful to make it
overall default.

Running 'perf stat' will now collect system wide data.

Committer note:

Testing it:

  # perf stat
  ^C
   Performance counter stats for 'system wide':

         3571.559178      cpu-clock (msec)          #    4.000 CPUs utilized
               3,346      context-switches          #    0.937 K/sec
                 277      cpu-migrations            #    0.078 K/sec
              57,271      page-faults               #    0.016 M/sec
       4,535,633,835      cycles                    #    1.270 GHz
       6,389,736,516      instructions              #    1.41  insn per cycle
       1,541,293,875      branches                  #  431.547 M/sec
          14,526,396      branch-misses             #    0.94% of all branches

         0.892950118 seconds time elapsed

  #

Requested-and-Acked-by: Borislav Petkov <bp@alien8.de>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20170217170034.GB15389@krava
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/Documentation/perf-stat.txt | 2 +-
 tools/perf/builtin-stat.c              | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
index d96ccd4844df..aecf2a87e7d6 100644
--- a/tools/perf/Documentation/perf-stat.txt
+++ b/tools/perf/Documentation/perf-stat.txt
@@ -63,7 +63,7 @@ report::
 
 -a::
 --all-cpus::
-        system-wide collection from all CPUs
+        system-wide collection from all CPUs (default if no target is specified)
 
 -c::
 --scale::
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index ca27a8a705ac..9989b03c21f2 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -2445,8 +2445,9 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
 	} else if (big_num_opt == 0) /* User passed --no-big-num */
 		big_num = false;
 
+	/* Make system wide (-a) the default target. */
 	if (!argc && target__none(&target))
-		usage_with_options(stat_usage, stat_options);
+		target.system_wide = true;
 
 	if (run_count < 0) {
 		pr_err("Run count must be a positive number\n");
-- 
2.9.3

  parent reply	other threads:[~2017-02-20 19:12 UTC|newest]

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-02-20 19:08 [GIT PULL 00/18] perf/core improvements and fixes Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 01/18] tools perf scripting python: clang doesn't have -spec, remove it Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 02/18] perf python: Filter out -specs=/a/b/c from the python binding cc options Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 03/18] tools lib traceevent: It's preempt not prempt Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 04/18] perf session: Fix DEBUG=1 build with clang Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 05/18] perf cpumap: Add cpu__max_present_cpu() Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 06/18] perf header: Make build_cpu_topology skip offline/absent CPUs Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 07/18] perf tools: Replace _SC_NPROCESSORS_CONF with max_present_cpu in cpu_topology_map Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 08/18] perf build: Add special fixdep cleaning rule Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 09/18] perf tools: Move new_term arguments into struct parse_events_term template Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 10/18] perf tools: Fail on using multiple bits long terms without value Arnaldo Carvalho de Melo
2017-02-20 19:08 ` Arnaldo Carvalho de Melo [this message]
2017-02-20 19:15   ` [PATCH 11/18] perf stat: Add -a as default target Borislav Petkov
2017-02-20 19:55     ` Arnaldo Carvalho de Melo
2017-02-20 19:59       ` Borislav Petkov
2017-02-21  7:49         ` Jiri Olsa
2017-02-20 19:08 ` [PATCH 12/18] perf record: " Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 13/18] perf utils: Add perf_quiet_option() Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 14/18] perf utils: Check verbose flag properly Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 15/18] perf report: Add -q/--quiet option Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 16/18] perf diff: " Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 17/18] perf annotate: " Arnaldo Carvalho de Melo
2017-02-20 19:08 ` [PATCH 18/18] perf record: Honor --quiet option properly Arnaldo Carvalho de Melo
2017-02-21  8:08 ` [GIT PULL 00/18] perf/core improvements and fixes Ingo Molnar

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