From 38f6ae1e1b0d5e8b0a95f88c1eee2c5e8b001631 Mon Sep 17 00:00:00 2001
From: Anton Blanchard <anton@samba.org>
Date: Fri, 2 Dec 2011 09:38:33 +1100
Subject: [PATCH 1/2] perf stat: Failure with "Operation not supported"
perf stat is failing on PowerPC:
Error: open_counter returned with 95 (Operation not supported). /bin/dmesg may provide additional information.
Fatal: Not all events could be opened.
commit 370faf1dd046 (perf stat: Fail softly on unsupported events)
added a check for failure returning ENOENT, but the POWER backend
returns EOPNOTSUPP. It looks like alpha, blackfin and mips do the
same.
With the patch applied, things work as expected:
Performance counter stats for '/bin/true':
0.362176 task-clock # 0.623 CPUs utilized
0 context-switches # 0.000 M/sec
0 CPU-migrations # 0.000 M/sec
28 page-faults # 0.077 M/sec
1,677,020 cycles # 4.630 GHz
<not supported> stalled-cycles-frontend
<not supported> stalled-cycles-backend
431,220 instructions # 0.26 insns per cycle
101,889 branches # 281.325 M/sec
4,145 branch-misses # 4.07% of all branches
0.000581361 seconds time elapsed
Cc: <stable@kernel.org> # 3.0+
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/20111202093833.5fef7226@kryten
Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/builtin-stat.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 7d98676808d8..955930e0a5c3 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -463,7 +463,8 @@ 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, first) < 0) {
- if (errno == EINVAL || errno == ENOSYS || errno == ENOENT) {
+ if (errno == EINVAL || errno == ENOSYS ||
+ errno == ENOENT || errno == EOPNOTSUPP) {
if (verbose)
ui__warning("%s event is not supported by the kernel.\n",
event_name(counter));
From 6340cfed48c478cf67451ddcd2daa3438e642632 Mon Sep 17 00:00:00 2001
From: Andrew Vagin <avagin@openvz.org>
Date: Mon, 28 Nov 2011 12:03:29 +0300
Subject: [PATCH 2/2] perf header: Use event_name() to get an event name
perf_evsel.name may be not initialized
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Arun Sharma <asharma@fb.com>
Cc: devel@openvz.org
Link: http://lkml.kernel.org/r/1322471015-107825-2-git-send-email-avagin@openvz.org
Signed-off-by: Andrew Vagin <avagin@openvz.org>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
tools/perf/util/header.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index bcd05d05b4f0..33c17a2b2a81 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -388,7 +388,7 @@ static int write_event_desc(int fd, struct perf_header *h __used,
/*
* write event string as passed on cmdline
*/
- ret = do_write_string(fd, attr->name);
+ ret = do_write_string(fd, event_name(attr));
if (ret < 0)
return ret;
/*