diff options
| author | David Ahern <dsahern@gmail.com> | 2011-04-29 16:04:15 -0600 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-04-30 00:18:14 +0200 |
| commit | c63ca0c01d73563d4e2ab174bb3dd1e5efb907e6 (patch) | |
| tree | c00105af90d900c5eacacb43bbb499229043d0f9 | |
| parent | 947b4ad1d198b7303ecc961f4939a331be0c48f0 (diff) | |
perf stat: Tell user about unsupported events in the list
Similar to perf-record, tell user about unsupported events
that will not be counted if invoked in verbose mode.
e.g.,
$ perf stat -e dTLB-prefetch-misses -v -- sleep 1
dTLB-prefetch-misses event is not supported by the kernel.
dTLB-prefetch-misses: 0 0 0
Performance counter stats for 'sleep 1':
<not counted> dTLB-prefetch-misses
1.001884783 seconds time elapsed
Signed-off-by: David Ahern <dsahern@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1304114655-10600-1-git-send-email-dsahern@gmail.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | tools/perf/builtin-stat.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c index c8b535bc27b..602c3c96fa1 100644 --- a/tools/perf/builtin-stat.c +++ b/tools/perf/builtin-stat.c @@ -377,8 +377,12 @@ 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) < 0) { - if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) + if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) { + if (verbose) + ui__warning("%s event is not supported by the kernel.\n", + event_name(counter)); continue; + } if (errno == EPERM || errno == EACCES) { error("You may not have permission to collect %sstats.\n" |