From mboxrd@z Thu Jan 1 00:00:00 1970 From: Namhyung Kim Subject: Re: Power consumption measurements for ARM Date: Wed, 13 Aug 2014 13:41:11 +0900 Message-ID: <874mxhf1co.fsf@sejong.aot.lge.com> References: <53E9CE5D.9040307@gmail.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from lgeamrelo04.lge.com ([156.147.1.127]:56785 "EHLO lgeamrelo04.lge.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750740AbaHMElN (ORCPT ); Wed, 13 Aug 2014 00:41:13 -0400 In-Reply-To: <53E9CE5D.9040307@gmail.com> (taeung's message of "Tue, 12 Aug 2014 17:20:45 +0900") Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: taeung Cc: linux-perf-users@vger.kernel.org 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