diff options
| author | Anton Blanchard <anton@samba.org> | 2011-12-01 23:38:33 +0100 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-12-05 17:32:40 +0100 |
| commit | 38f6ae1e1b0d5e8b0a95f88c1eee2c5e8b001631 (patch) | |
| tree | 1a58d85b805768c0d5ab517770aa09990266379e /tools/perf | |
| parent | Merge branch 'tip/perf/urgent' of git://git.kernel.org/pub/scm/linux/kernel/g... (diff) | |
| download | linux-38f6ae1e1b0d5e8b0a95f88c1eee2c5e8b001631.tar.xz linux-38f6ae1e1b0d5e8b0a95f88c1eee2c5e8b001631.zip | |
perf stat: Failure with "Operation not supported"
perf stat is failing on PowerPC:
Error: open_counter returned with 95 (Operation not supported). /bin/dmesg may provide additional information.
Fatal: Not all events could be opened.
commit 370faf1dd046 (perf stat: Fail softly on unsupported events)
added a check for failure returning ENOENT, but the POWER backend
returns EOPNOTSUPP. It looks like alpha, blackfin and mips do the
same.
With the patch applied, things work as expected:
Performance counter stats for '/bin/true':
0.362176 task-clock # 0.623 CPUs utilized
0 context-switches # 0.000 M/sec
0 CPU-migrations # 0.000 M/sec
28 page-faults # 0.077 M/sec
1,677,020 cycles # 4.630 GHz
<not supported> stalled-cycles-frontend
<not supported> stalled-cycles-backend
431,220 instructions # 0.26 insns per cycle
101,889 branches # 281.325 M/sec
4,145 branch-misses # 4.07% of all branches
0.000581361 seconds time elapsed
Cc: <stable@kernel.org> # 3.0+
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20111202093833.5fef7226@kryten
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf')
| -rw-r--r-- | tools/perf/builtin-stat.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index 7d98676808d8..955930e0a5c3 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -463,7 +463,8 @@ static int run_perf_stat(int argc __used, const char **argv) list_for_each_entry(counter, &evsel_list->entries, node) { if (create_perf_stat_counter(counter, first) < 0) { - if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) { + if (errno == EINVAL || errno == ENOSYS || + errno == ENOENT || errno == EOPNOTSUPP) { if (verbose) ui__warning("%s event is not supported by the kernel.\n", event_name(counter)); |