summaryrefslogtreecommitdiffstats
path: root/tools
diff options
context:
space:
mode:
authorJiri Olsa <jolsa@redhat.com>2017-02-17 18:00:18 +0100
committerArnaldo Carvalho de Melo <acme@redhat.com>2017-02-17 17:32:38 -0300
commit483635a9d0802d5ffbe402ceac5b93ddb2acb138 (patch)
treef192a482f84b1abe879c110f8509a20a72edce22 /tools
parent0d79f8b93187c771b6971acfaba67f4e2f1e0710 (diff)
downloadlinux-483635a9d0802d5ffbe402ceac5b93ddb2acb138.tar.gz
perf record: Add -a as default target
Running 'perf record' with no target (-a, -p, -t, etc) will now collect system wide data. Commiter notes: Testing it: [root@jouet ~]# 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@kernel.org> Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Borislav Petkov <bp@alien8.de> 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/20170217170018.GA15389@krava Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/Documentation/perf-record.txt2
-rw-r--r--tools/perf/builtin-record.c4
2 files changed, 4 insertions, 2 deletions
diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 27256bc..b16003e 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 6cd6776..b87bbef 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,