linux-kernel - Re: [PATCH 1/4] perf, tools: Output running time and run/enabled ratio in CSV mode

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Date:	Mon, 9 Mar 2015 07:04:34 -0700
From:	Andi Kleen <ak@...ux.intel.com>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Andi Kleen <andi@...stfloor.org>, acme@...nel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/4] perf, tools: Output running time and run/enabled
 ratio in CSV mode

> hum, so people using CSV mode will now see extra 2 numbers
> at the end of the line:
> 
>   $ ./perf.old stat -x, -e cycles ls > /dev/null
>   2679161,,cycles
>   $ ./perf stat -x, -e cycles ls > /dev/null
>   2574169,,cycles,1295544,100.00
> 
> we could be breaking existing scripts..

I doubt it. Typical CSV parsers ignore additional data at the end.

Just don't insert stuff in the middle (like it was done recently).
That breaks a lot of things.

> you recently added 'running-time' option for record,
> could you please add same option for stat?

Could be done, but I'm not sure it's worth it here.

-Andi
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