Commit c63ca0c0 authored Apr 29, 2011 by David Ahern Committed by Ingo Molnar Apr 30, 2011

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>

parent 947b4ad1

tools/perf/builtin-stat.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -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"