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

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Message-ID: <20150312112736.GE8369@krava.redhat.com>
Date:	Thu, 12 Mar 2015 12:27:36 +0100
From:	Jiri Olsa <jolsa@...hat.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	acme@...nel.org, namhyung@...nel.org, linux-kernel@...r.kernel.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: Re: [PATCH] perf, tools: Output running time and run/enabled ratio
 in CSV mode

On Wed, Mar 11, 2015 at 07:16:27AM -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.
> 
> v2: Add extra print_running function
> v3: Avoid printing nan
> v4: Remove some elses and add brackets.
> v5: Move non CSV case into print_running

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

thanks,
jirka
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