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author | Anton Blanchard <anton@samba.org> | 2011-12-02 09:38:33 +1100 |
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committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2011-12-05 14:32:40 -0200 |
commit | 38f6ae1e1b0d5e8b0a95f88c1eee2c5e8b001631 (patch) | |
tree | 1a58d85b805768c0d5ab517770aa09990266379e /tools/perf/builtin-stat.c | |
parent | dc440d10e1668b15fe704a23adb9b53fbbb24a44 (diff) | |
download | linux-38f6ae1e1b0d5e8b0a95f88c1eee2c5e8b001631.tar.gz |
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/builtin-stat.c')
-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)); |