From: Namhyung Kim <namhyung@kernel.org>
To: taeung <treeze.taeung@gmail.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: Power consumption measurements for ARM
Date: Wed, 13 Aug 2014 13:41:11 +0900 [thread overview]
Message-ID: <874mxhf1co.fsf@sejong.aot.lge.com> (raw)
In-Reply-To: <53E9CE5D.9040307@gmail.com> (taeung's message of "Tue, 12 Aug 2014 17:20:45 +0900")
Hi taeung,
On Tue, 12 Aug 2014 17:20:45 +0900, taeung wrote:
> Hi, perf hackers
>
> I have other question.
> As I know, perf also supports RAPL(running average power limit )
> for power consumption measurements.
>
> And as I understand, the amount of power consumption is estimated
> by using hardware performance counters and I/O models (sure, in
> availableintel CPUs).
>
> And I've not found power consumption measurements for ARM (likeCortex-A9)
> except for using tools like ARM Energy Probes and Linux EAPTools.
>
> But as I know , The Cortex-A9 Core Platform has dynamic scaling
> ofvoltage and frequency.
> (Dynamic Voltage and Frequency Scaling (DVFS))
>
> Have you ever tried to measure power consumption on ARM using
> thingslike DVFS?
You may want to look at powertop - see https://01.org/powertop .
>
> and I also wonder how to use perf to measure power consumption on
> available intel CPU.
Please check https://lkml.org/lkml/2013/11/12/393 .
Thanksm,
Namhyung
prev parent reply other threads:[~2014-08-13 4:41 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-08-12 8:20 Power consumption measurements for ARM taeung
2014-08-13 4:41 ` Namhyung Kim [this message]
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