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Commit 370faf1d authored by Ingo Molnar's avatar Ingo Molnar
Browse files

perf stat: Fail softly on unsupported events 



David Ahern reported this perf stat failure:

> # /tmp/build-perf/perf stat -- sleep 1
>   Error: stalled-cycles-frontend event is not supported.
>   Fatal: Not all events could be opened.
>
> This is a Dell R410 with an E5620 processor.

Fail in a softer fashion on unknown/unsupported events.

Reported-by: default avatarDavid 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/n/tip-7y40wib8n006io7hjpn1dsrm@git.kernel.org


Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent fce3c786

tools/perf/builtin-stat.c

+1 −3
Original line number Diff line number Diff line
@@ -377,7 +377,7 @@ 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)

			if (errno == EINVAL || errno == ENOSYS || errno == ENOENT)

				continue;



			if (errno == EPERM || errno == EACCES) {
@@ -385,8 +385,6 @@ static int run_perf_stat(int argc __used, const char **argv) 
				      "\t Consider tweaking"

				      " /proc/sys/kernel/perf_event_paranoid or running as root.",

				      system_wide ? "system-wide " : "");

			} else if (errno == ENOENT) {

				error("%s event is not supported. ", event_name(counter));

			} else {

				error("open_counter returned with %d (%s). "

				      "/bin/dmesg may provide additional information.\n",