linux-kernel - Re: [PATCH 5/5] perf, tools: Output running time and run/enabled ratio in CSV mode

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Date:	Mon, 5 Aug 2013 11:45:56 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	acme@...radead.org, eranian@...gle.com,
	linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 5/5] perf, tools: Output running time and run/enabled
 ratio in CSV mode

On Fri, Aug 02, 2013 at 05:41:13PM -0700, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> The information how much a counter ran in perf stat can be quite
> interesting for other tools to judge how trustworthy a measurement is.
> 
> Currently it is only output in non CSV mode.
> 
> This patches make perf stat always output the running time and the
> enabled/running ratio in CSV mode.
> 
> This adds two new fields at the end for each line. I assume that existing
> tools ignore new fields at the end, so it's on by default.
> 
> Only CSV mode is affected, no difference otherwise.
> 
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> ---
>  tools/perf/builtin-stat.c | 57 +++++++++++++++++++++++++++++++++++++----------
>  1 file changed, 45 insertions(+), 12 deletions(-)
> 
> diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
> index f686d5f..940fcfd 100644
> --- a/tools/perf/builtin-stat.c
> +++ b/tools/perf/builtin-stat.c
> @@ -982,6 +982,13 @@ static void print_aggr(char *prefix)
>  					fprintf(output, "%s%s",
>  						csv_sep, counter->cgrp->name);
>  
> +				if (csv_output)
> +					fprintf(output, "%s%" PRIu64 "%s%.2f",
> +						csv_sep,
> +						run,
> +						csv_sep,
> +						100.0 * run / ena);

looks like we could use function/macro for this

jirka
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