linux-kernel - [tip:perf/core] perf stat: Quieten failed to read counter message

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Message-ID: <tip-245bad8eb45fca36638da53fb0a361397a707001@git.kernel.org>
Date:	Tue, 8 Sep 2015 07:32:26 -0700
From:	tip-bot for Andi Kleen <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	tglx@...utronix.de, linux-kernel@...r.kernel.org, acme@...hat.com,
	jolsa@...nel.org, hpa@...or.com, ak@...ux.intel.com,
	mingo@...nel.org
Subject: [tip:perf/core] perf stat: Quieten failed to read counter message

Commit-ID:  245bad8eb45fca36638da53fb0a361397a707001
Gitweb:     http://git.kernel.org/tip/245bad8eb45fca36638da53fb0a361397a707001
Author:     Andi Kleen <ak@...ux.intel.com>
AuthorDate: Tue, 1 Sep 2015 15:52:46 -0700
Committer:  Arnaldo Carvalho de Melo <acme@...hat.com>
CommitDate: Wed, 2 Sep 2015 16:30:47 -0300

perf stat: Quieten failed to read counter message

Since 3b3eb0445 running perf stat on a system without
backend-stalled-cycles spits out ugly warnings by default.

Since that is quite common, make the message a debug message only.

We know anyways that the counter wasn't read by the normal <unsupported>
output.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
Acked-by: Jiri Olsa <jolsa@...nel.org>
Link: http://lkml.kernel.org/r/1441147966-14917-1-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/builtin-stat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index d46dbb1..a96fb5c 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -215,7 +215,7 @@ static void read_counters(bool close_counters)
 
 	evlist__for_each(evsel_list, counter) {
 		if (read_counter(counter))
-			pr_warning("failed to read counter %s\n", counter->name);
+			pr_debug("failed to read counter %s\n", counter->name);
 
 		if (perf_stat_process_counter(&stat_config, counter))
 			pr_warning("failed to process counter %s\n", counter->name);
--
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