From 370faf1dd0461ad811852c8abbbcd3d73b1e4fc4 Mon Sep 17 00:00:00 2001
From: Ingo Molnar <mingo@elte.hu>
Date: Fri, 29 Apr 2011 16:11:03 +0200
Subject: [PATCH] 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: 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/n/tip-7y40wib8n006io7hjpn1dsrm@git.kernel.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
tools/perf/builtin-stat.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 9e596ab98d05..c8b535bc27bd 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -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",
--
2.20.1