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authorDavid Ahern <dsahern@gmail.com>2011-04-29 16:04:15 -0600
committerIngo Molnar <mingo@elte.hu>2011-04-30 00:18:14 +0200
commitc63ca0c01d73563d4e2ab174bb3dd1e5efb907e6 (patch)
treec00105af90d900c5eacacb43bbb499229043d0f9
parent947b4ad1d198b7303ecc961f4939a331be0c48f0 (diff)
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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.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index c8b535b..602c3c9 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"