From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752084AbaDDIQw (ORCPT ); Fri, 4 Apr 2014 04:16:52 -0400 Received: from mail-wg0-f50.google.com ([74.125.82.50]:36024 "EHLO mail-wg0-f50.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751794AbaDDIQn (ORCPT ); Fri, 4 Apr 2014 04:16:43 -0400 Message-ID: <533E6A7A.4070400@linaro.org> Date: Fri, 04 Apr 2014 10:16:58 +0200 From: Daniel Lezcano User-Agent: Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: Len Brown CC: "linux-kernel@vger.kernel.org" , Ingo Molnar , Peter Zijlstra , "Rafael J. Wysocki" , nicolas.pitre@linaro.org, Linux PM list , alex.shi@linaro.org, vincent.guittot@linaro.org, morten.rasmussen@arm.com Subject: Re: [RFC PATCHC 0/3] sched/idle : find the idlest cpu with cpuidle info References: <1396009796-31598-1-git-send-email-daniel.lezcano@linaro.org> In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/04/2014 08:29 AM, Len Brown wrote: > Hi Daniel, > > Interesting idea. > > The benefit of this patch is to reduce power. > Have you been able to measure a power reduction, via power meter, or > via built-in RAPL power meter? > (turbostat will show RAPL watts, or if you have constant quantity of > work, use turbostat -J) Hi Len, thanks for looking the patches. I will tweak, respin the patchset and do some more measurements. I don't have a power meter but may be the RAPL could help to test on x86. Thanks -- Daniel -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog