linux-kernel - [PATCH] perf, tools, stat: Quieten failed to read counter message

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Date:	Tue,  1 Sep 2015 15:52:46 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	acme@...nel.org
Cc:	linux-kernel@...r.kernel.org, jolsa@...nel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH] perf, tools, stat: Quieten failed to read counter message

From: Andi Kleen <ak@...ux.intel.com>

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>
---
 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);
-- 
2.4.3

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