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@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/r/1441147966-14917-1-git-send-email-andi@firstfloor.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index d46dbb1bc65d95980b13ec7f473f793c8262a05b..a96fb5c3bedb8f242f56e59c0468019120bac133 100644 (file)
--- 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);