Em Fri, Feb 17, 2017 at 03:00:58PM +0100, Jiri Olsa escreveu: > Adding system wide (-a) option as a default target > if non is specified. > > # perf record > Warning: No target specified, setting system-wide collection (-a).
Ditto, this warning will get annoying after a while... > ... > > Signed-off-by: Jiri Olsa <jo...@kernel.org> > Cc: David Ahern <dsah...@gmail.com> > Cc: Namhyung Kim <namhy...@kernel.org> > Cc: Peter Zijlstra <a.p.zijls...@chello.nl> > Link: http://lkml.kernel.org/n/tip-tq11of2qlz8kxpxzva05d...@git.kernel.org > --- > tools/perf/Documentation/perf-record.txt | 2 +- > tools/perf/builtin-record.c | 6 ++++-- > 2 files changed, 5 insertions(+), 3 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..dab23f6b10f3 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); > - if (!argc && target__none(&rec->opts.target)) > - usage_with_options(record_usage, record_options); > + if (!argc && target__none(&rec->opts.target)) { > + pr_warning("Warning: No target specified, setting system-wide > collection (-a).\n"); > + rec->opts.target.system_wide = true; > + } > > if (nr_cgroups && !rec->opts.target.system_wide) { > usage_with_options_msg(record_usage, record_options, > -- > 2.7.4
