linux-kernel - Re: [PATCH 6/9] perf, tools, stat: Document CSV format in manpage

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Message-ID: <20160122100830.GD11995@krava.brq.redhat.com>
Date:	Fri, 22 Jan 2016 11:08:30 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	acme@...nel.org, jolsa@...nel.org, mingo@...nel.org,
	linux-kernel@...r.kernel.org, eranian@...gle.com,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH 6/9] perf, tools, stat: Document CSV format in manpage

On Tue, Jan 19, 2016 at 06:26:49PM -0800, Andi Kleen wrote:
> From: Andi Kleen <ak@...ux.intel.com>
> 
> With all the recently added fields in the perf stat CSV output
> we should finally document them in the man page. Do this here.
> 
> Signed-off-by: Andi Kleen <ak@...ux.intel.com>
> ---
>  tools/perf/Documentation/perf-stat.txt | 19 +++++++++++++++++++
>  1 file changed, 19 insertions(+)
> 
> diff --git a/tools/perf/Documentation/perf-stat.txt b/tools/perf/Documentation/perf-stat.txt
> index 52ef7a9..6629a8e 100644
> --- a/tools/perf/Documentation/perf-stat.txt
> +++ b/tools/perf/Documentation/perf-stat.txt
> @@ -211,6 +211,25 @@ $ perf stat -- make -j
>  
>   Wall-clock time elapsed:   719.554352 msecs
>  
> +CSV FORMAT
> +----------
> +
> +With -x, perf stat is able to output a not-quite-CSV format output
> +(commas in the output are not put into "")
> +
> +The fields are in this order:
> +
> +	- optional usec time stamp in fractions of second (with -I xxx)
> +	- unit of the counter value or empty
> +	- event name
> +	- counter value
> +	- run time of counter
> +	- percentage of measurement time the counter was running
> +	- optional metric value
> +	- optional unit of metric
> +
> +Additional metrics may be printed with all earlier fields being empty.

[jolsa@...va perf]$ sudo ./perf stat -e cycles,instructions -a -x, 
160517940,,cycles,2357448795,100.00,,Ghz,2357448795,100.00

                                         ^^^^^^^^^^^^^^^^^  what's this data?

84822675,,instructions,2357537479,100.00,0.53,insn per cycle


,,,2357537479,100.00,,stalled cycles per insn,2357537479,100.00

this line is probably wrong, as noted in previous email..?


thanks,
jirka