Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754275Ab2HPFjt (ORCPT ); Thu, 16 Aug 2012 01:39:49 -0400 Received: from mga01.intel.com ([192.55.52.88]:34573 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752509Ab2HPFjs (ORCPT ); Thu, 16 Aug 2012 01:39:48 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.77,776,1336374000"; d="scan'208";a="202365921" Message-ID: <502C8798.8060807@intel.com> Date: Thu, 16 Aug 2012 13:39:36 +0800 From: Alex Shi User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:9.0) Gecko/20111229 Thunderbird/9.0 MIME-Version: 1.0 To: Matthew Garrett CC: Peter Zijlstra , Suresh Siddha , Arjan van de Ven , vincent.guittot@linaro.org, svaidy@linux.vnet.ibm.com, Ingo Molnar , Andrew Morton , Linus Torvalds , "linux-kernel@vger.kernel.org" Subject: Re: [discussion]sched: a rough proposal to enable power saving in scheduler References: <5028F12C.7080405@intel.com> <20120815161911.GA14534@srcf.ucam.org> <502C7F24.6020900@intel.com> <20120816053133.GA31623@srcf.ucam.org> In-Reply-To: <20120816053133.GA31623@srcf.ucam.org> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1040 Lines: 32 On 08/16/2012 01:31 PM, Matthew Garrett wrote: > On Thu, Aug 16, 2012 at 01:03:32PM +0800, Alex Shi wrote: >> On 08/16/2012 12:19 AM, Matthew Garrett wrote: >>> Are there workloads in which "power" might provide more performance than >>> "performance"? If so, don't use these terms. >> >> Power scheme should no chance has better performance in design. > > Power will tend to concentrate processes on packages, yes. while performance > will tend to split them across packages? No, there is still has balance idea in this rough proposal. If a domain is not overload, it is better to left old tasks unchanged. I should say, current scheduler is the 'performance' trend scheme. What if two cooperating > processes gain from being on the same package and sharing cache > locality? > -- 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/