linux-kernel - Re: [PATCH v2 0/3] perf,x86: add Intel RAPL PMU support

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Message-ID: <CABPqkBRa49QtPUn2An=vhS3NVK2HL0wc7jRiTtptEejv5V6zBw@mail.gmail.com>
Date:	Wed, 23 Oct 2013 11:24:51 +0200
From:	Stephane Eranian <eranian@...gle.com>
To:	Andi Kleen <ak@...ux.intel.com>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	LKML <linux-kernel@...r.kernel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	"mingo@...e.hu" <mingo@...e.hu>, Jiri Olsa <jolsa@...hat.com>,
	"Yan, Zheng" <zheng.z.yan@...el.com>
Subject: Re: [PATCH v2 0/3] perf,x86: add Intel RAPL PMU support

Andi,

On Wed, Oct 23, 2013 at 9:07 AM, Andi Kleen <ak@...ux.intel.com> wrote:
>> # perf stat -a -e power/energy-cores/,power/energy-pkg/,ref-cycles -I
>> 1000 sleep 1000
>> #           time        unit            counts events
>>      1.000264953      Joules              2.09 power/energy-cores/
>>   [100.00%]
>>      1.000264953      Joules              5.94 power/energy-pkg/
>>      1.000264953                   160,530,320 ref-cycles
>>      2.000640422      Joules              2.07 power/energy-cores/
>>      2.000640422      Joules              5.94 power/energy-pkg/
>>      2.000640422                   152,673,056 ref-cycles
>>      3.000964416      Joules              2.08 power/energy-cores/
>>      3.000964416      Joules              5.93 power/energy-pkg/
>>      3.000964416                   158,779,184 ref-cycles
>
> Can you add some column marker that there is no unit (like -) ?
>
> This is just in case someone wants to parse this with a tool. Yes they
> should be using -x, but it is still better to be always parseable.
>
It is parseable, it's just that you get an empty field: ,,
But I can add a "?".
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