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Message-Id: <20170220190839.3928-13-acme@kernel.org>
Date: Mon, 20 Feb 2017 16:08:33 -0300
From: Arnaldo Carvalho de Melo <acme@...nel.org>
To: Ingo Molnar <mingo@...nel.org>
Cc: linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...hat.com>,
Jiri Olsa <jolsa@...nel.org>, Borislav Petkov <bp@...en8.de>,
David Ahern <dsahern@...il.com>,
Namhyung Kim <namhyung@...nel.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [PATCH 12/18] perf record: Add -a as default target
From: Jiri Olsa <jolsa@...hat.com>
Running 'perf record' with no target (-a, -p, -t, etc) will now collect
system wide data.
Commiter notes:
Testing it:
[root@...et ~]# perf record
^C[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.351 MB perf.data (366 samples) ]
#
is equivalent to:
# perf record -a
^C[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 1.411 MB perf.data (978 samples) ]
#
Signed-off-by: Jiri Olsa <jolsa@...nel.org>
Tested-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: David Ahern <dsahern@...il.com>
Cc: Jiri Olsa <jolsa@...nel.org>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Link: http://lkml.kernel.org/r/20170217170018.GA15389@krava
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
tools/perf/Documentation/perf-record.txt | 2 +-
tools/perf/builtin-record.c | 4 +++-
2 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 27256bc68eda..b16003ec14a7 100644
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -157,7 +157,7 @@ OPTIONS
-a::
--all-cpus::
- System-wide collection from all CPUs.
+ System-wide collection from all CPUs (default if no target is specified).
-p::
--pid=::
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 6cd6776052e7..b87bbef73394 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1677,8 +1677,10 @@ int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
argc = parse_options(argc, argv, record_options, record_usage,
PARSE_OPT_STOP_AT_NON_OPTION);
+
+ /* Make system wide (-a) the default target. */
if (!argc && target__none(&rec->opts.target))
- usage_with_options(record_usage, record_options);
+ rec->opts.target.system_wide = true;
if (nr_cgroups && !rec->opts.target.system_wide) {
usage_with_options_msg(record_usage, record_options,
--
2.9.3
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