From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754901Ab3KLSyF (ORCPT ); Tue, 12 Nov 2013 13:54:05 -0500 Received: from e28smtp03.in.ibm.com ([122.248.162.3]:42141 "EHLO e28smtp03.in.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752679Ab3KLSyC (ORCPT ); Tue, 12 Nov 2013 13:54:02 -0500 Message-ID: <52827839.80904@linux.vnet.ibm.com> Date: Wed, 13 Nov 2013 00:19:29 +0530 From: "Srivatsa S. Bhat" User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120828 Thunderbird/15.0 MIME-Version: 1.0 To: Andrew Morton CC: mgorman@suse.de, dave@sr71.net, hannes@cmpxchg.org, tony.luck@intel.com, matthew.garrett@nebula.com, riel@redhat.com, arjan@linux.intel.com, srinivas.pandruvada@linux.intel.com, willy@linux.intel.com, kamezawa.hiroyu@jp.fujitsu.com, lenb@kernel.org, rjw@sisk.pl, gargankita@gmail.com, paulmck@linux.vnet.ibm.com, svaidy@linux.vnet.ibm.com, andi@firstfloor.org, isimatu.yasuaki@jp.fujitsu.com, santosh.shilimkar@ti.com, kosaki.motohiro@gmail.com, linux-pm@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, maxime.coquelin@stericsson.com, loic.pallardy@stericsson.com, amit.kachhap@linaro.org, thomas.abraham@linaro.org, markgross@thegnar.org Subject: Re: [Results] [RFC PATCH v4 00/40] mm: Memory Power Management References: <20130925231250.26184.31438.stgit@srivatsabhat.in.ibm.com> <52437128.7030402@linux.vnet.ibm.com> <20130925164057.6bbaf23bdc5057c42b2ab010@linux-foundation.org> <52442F6F.5020703@linux.vnet.ibm.com> <5281E09B.3060303@linux.vnet.ibm.com> In-Reply-To: <5281E09B.3060303@linux.vnet.ibm.com> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 13111218-3864-0000-0000-00000B071BA7 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/12/2013 01:32 PM, Srivatsa S. Bhat wrote: > On 09/26/2013 06:28 PM, Srivatsa S. Bhat wrote: >> On 09/26/2013 05:10 AM, Andrew Morton wrote: >>> On Thu, 26 Sep 2013 04:56:32 +0530 "Srivatsa S. Bhat" wrote: >>> >>>> Experimental Results: >>>> ==================== >>>> >>>> Test setup: >>>> ---------- >>>> >>>> x86 Sandybridge dual-socket quad core HT-enabled machine, with 128GB RAM. >>>> Memory Region size = 512MB. >>> >>> Yes, but how much power was saved ;) >>> >> >> I don't have those numbers yet, but I'll be able to get them going forward. >> > > Hi, > > I performed experiments on an IBM POWER 7 machine and got actual power-savings > numbers (upto 2.6% of total system power) from this patchset. I presented them > at the Kernel Summit but forgot to post them on LKML. So here they are: > And here is a recent LWN article that highlights the important design changes in this version and gives a good overview of this patchset as a whole: http://lwn.net/Articles/568891/ And here is the link to the patchset (v4): http://lwn.net/Articles/568369/ Regards, Srivatsa S. Bhat