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perf trace: Explicitly enable system-wide mode if no option is given

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When no target cpu/user/task option is given, perf trace will do its job
system wide for all online cpus.  Make it explicit to reduce possible
confusion when reading code.

No functional changes intended.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1349413336-26936-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Namhyung Kim 2012-10-05 14:02:14 +09:00 committed by Arnaldo Carvalho de Melo
parent 32caf0d1fe
commit ee76120e2d
1 changed files with 3 additions and 0 deletions
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3
tools/perf/builtin-trace.c
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@ -343,5 +343,8 @@ int cmd_trace(int argc, const char **argv, const char *prefix __maybe_unused)
return err;
}
if (perf_target__none(&trace.opts.target))
trace.opts.target.system_wide = true;
return trace__run(&trace);
}