From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753249Ab2LNGfm (ORCPT ); Fri, 14 Dec 2012 01:35:42 -0500 Received: from mga14.intel.com ([143.182.124.37]:29268 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751218Ab2LNGfl (ORCPT ); Fri, 14 Dec 2012 01:35:41 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,279,1355126400"; d="scan'208";a="231433078" Message-ID: <50CAC905.9070100@intel.com> Date: Fri, 14 Dec 2012 14:36:53 +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: Mike Galbraith CC: Vincent Guittot , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linaro-dev@lists.linaro.org, peterz@infradead.org, mingo@kernel.org, linux@arm.linux.org.uk, pjt@google.com, santosh.shilimkar@ti.com, Morten.Rasmussen@arm.com, chander.kashyap@linaro.org, cmetcalf@tilera.com, tony.luck@intel.com, preeti@linux.vnet.ibm.com, paulmck@linux.vnet.ibm.com, tglx@linutronix.de, len.brown@intel.com, arjan@linux.intel.com, amit.kucheria@linaro.org, viresh.kumar@linaro.org Subject: Re: [RFC PATCH v2 3/6] sched: pack small tasks References: <1355319092-30980-1-git-send-email-vincent.guittot@linaro.org> <1355319092-30980-4-git-send-email-vincent.guittot@linaro.org> <50C93AC1.1060202@intel.com> <50C9E552.1010600@intel.com> <1355460356.5777.12.camel@marge.simpson.net> In-Reply-To: <1355460356.5777.12.camel@marge.simpson.net> 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 On 12/14/2012 12:45 PM, Mike Galbraith wrote: >> > Do you have further ideas for buddy cpu on such example? >>> > > >>> > > Which kind of sched_domain configuration have you for such system ? >>> > > and how many sched_domain level have you ? >> > >> > it is general X86 domain configuration. with 4 levels, >> > sibling/core/cpu/numa. > CPU is a bug that slipped into domain degeneration. You should have > SIBLING/MC/NUMA (chasing that down is on todo). Maybe. the CPU/NUMA is different on domain flags, CPU has SD_PREFER_SIBLING.