Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752737AbaGJLSl (ORCPT ); Thu, 10 Jul 2014 07:18:41 -0400 Received: from casper.infradead.org ([85.118.1.10]:35537 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751723AbaGJLSj (ORCPT ); Thu, 10 Jul 2014 07:18:39 -0400 Date: Thu, 10 Jul 2014 13:18:33 +0200 From: Peter Zijlstra To: Vincent Guittot Cc: mingo@kernel.org, linux-kernel@vger.kernel.org, linux@arm.linux.org.uk, linux-arm-kernel@lists.infradead.org, preeti@linux.vnet.ibm.com, Morten.Rasmussen@arm.com, efault@gmx.de, nicolas.pitre@linaro.org, linaro-kernel@lists.linaro.org, daniel.lezcano@linaro.org, dietmar.eggemann@arm.com Subject: Re: [PATCH v3 08/12] sched: move cfs task on a CPU with higher capacity Message-ID: <20140710111833.GY3935@laptop> References: <1404144343-18720-1-git-send-email-vincent.guittot@linaro.org> <1404144343-18720-9-git-send-email-vincent.guittot@linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1404144343-18720-9-git-send-email-vincent.guittot@linaro.org> User-Agent: Mutt/1.5.21 (2012-12-30) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, Jun 30, 2014 at 06:05:39PM +0200, Vincent Guittot wrote: > + /* > + * If the CPUs share their cache and the src_cpu's capacity is > + * reduced because of other sched_class or IRQs, we trig an > + * active balance to move the task > + */ > + if ((sd->flags & SD_SHARE_PKG_RESOURCES) > + && ((capacity_orig_of(src_cpu) * 100) > (capacity_of(src_cpu) * > + sd->imbalance_pct))) > return 1; Why is this tied to shared caches? -- 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/