perf-stat displays the command run in its summary output which is misleading
when using a cpu list or system wide collection.
Before:
perf stat -a -- sleep 1
Performance counter stats for 'sleep 1':
16152.670249 task-clock # 16.132 CPUs utilized
417 context-switches # 0.002 M/sec
7 cpu-migrations # 0.030 K/sec
...
After:
perf stat -a -- sleep 1
Performance counter stats for 'system wide':
16206.931120 task-clock # 16.144 CPUs utilized
395 context-switches # 0.002 M/sec
5 cpu-migrations # 0.030 K/sec
...
or
perf stat -C1 -- sleep 1
Performance counter stats for 'CPU(s) 1':
1001.669257 task-clock # 1.000 CPUs utilized
4,264 context-switches # 0.004 M/sec
3 cpu-migrations # 0.003 K/sec
...
Signed-off-by: David Ahern <dsah...@gmail.com>
Cc: Ingo Molnar <mi...@kernel.org>
Cc: Frederic Weisbecker <fweis...@gmail.com>
Cc: Peter Zijlstra <a.p.zijls...@chello.nl>
Cc: Jiri Olsa <jo...@redhat.com>
Cc: Namhyung Kim <namhyung....@lge.com>
Cc: Stephane Eranian <eran...@google.com>
---
tools/perf/builtin-stat.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index f686d5f..6cc0aa2 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -1115,7 +1115,11 @@ static void print_stat(int argc, const char **argv)
if (!csv_output) {
fprintf(output, "\n");
fprintf(output, " Performance counter stats for ");
- if (!perf_target__has_task(&target)) {
+ if (target.system_wide)
+ fprintf(output, "\'system wide");
+ else if (target.cpu_list)
+ fprintf(output, "\'CPU(s) %s", target.cpu_list);
+ else if (!perf_target__has_task(&target)) {
fprintf(output, "\'%s", argv[0]);
for (i = 1; i < argc; i++)
fprintf(output, " %s", argv[i]);
--
1.7.10.1
--
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