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

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Date:	Wed, 2 Sep 2015 08:07:20 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	acme@...nel.org, linux-kernel@...r.kernel.org, jolsa@...nel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH] perf, tools, stat: Quieten failed to read counter message

On Tue, Sep 01, 2015 at 03:52:46PM -0700, Andi Kleen wrote:
> 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.

Acked-by: Jiri Olsa <jolsa@...nel.org>

thanks,
jirka

> 
> 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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