Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752488Ab3DONug (ORCPT ); Mon, 15 Apr 2013 09:50:36 -0400 Received: from mga11.intel.com ([192.55.52.93]:3574 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750853Ab3DONue (ORCPT ); Mon, 15 Apr 2013 09:50:34 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.87,476,1363158000"; d="scan'208";a="319301684" Message-ID: <516C059E.20800@intel.com> Date: Mon, 15 Apr 2013 21:50:22 +0800 From: Alex Shi User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:15.0) Gecko/20120912 Thunderbird/15.0.1 MIME-Version: 1.0 To: Borislav Petkov CC: Len Brown , mingo@redhat.com, peterz@infradead.org, tglx@linutronix.de, akpm@linux-foundation.org, arjan@linux.intel.com, pjt@google.com, namhyung@kernel.org, efault@gmx.de, morten.rasmussen@arm.com, vincent.guittot@linaro.org, gregkh@linuxfoundation.org, preeti@linux.vnet.ibm.com, viresh.kumar@linaro.org, linux-kernel@vger.kernel.org, len.brown@intel.com, rafael.j.wysocki@intel.com, jkosina@suse.cz, clark.williams@gmail.com, tony.luck@intel.com, keescook@chromium.org, mgorman@suse.de, riel@redhat.com, Linux PM list Subject: Re: [patch v7 0/21] sched: power aware scheduling References: <1365040862-8390-1-git-send-email-alex.shi@intel.com> <516724F5.20504@kernel.org> <5167C9FA.8050406@intel.com> <20130412162348.GE2368@pd.tnic> <516A0652.8040505@intel.com> <20130414155925.GC20547@pd.tnic> <516B9859.70004@intel.com> <516B9B57.3030902@intel.com> <20130415095203.GA26524@pd.tnic> In-Reply-To: <20130415095203.GA26524@pd.tnic> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1227 Lines: 34 On 04/15/2013 05:52 PM, Borislav Petkov wrote: > On Mon, Apr 15, 2013 at 02:16:55PM +0800, Alex Shi wrote: >> And I need to say again. the powersaving policy just effect on system >> under utilisation. when system goes busy, it won't has effect. >> performance oriented policy will take over balance behaviour. > > And AFACU your patches, you do this automatically, right? Yes In which case, > an underutilized system will have switched to powersaving balancing and > will use *more* energy to retire the workload. Correct? > For fairness and total threads consideration, powersaving cost quit similar energy on kbuild benchmark, and even better. 17348.850 27400.458 15973.776 13737.493 18487.248 12167.816 11057.004 16080.750 11623.661 17288.102 27637.176 16560.375 10356.52 18482.584 12504.702 10905.772 16190.447 11125.625 10785.621 16113.330 11542.140 -- Thanks Alex -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/