From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1426188AbcFHOg0 (ORCPT ); Wed, 8 Jun 2016 10:36:26 -0400 Received: from merlin.infradead.org ([205.233.59.134]:57887 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1161912AbcFHOgZ (ORCPT ); Wed, 8 Jun 2016 10:36:25 -0400 Date: Wed, 8 Jun 2016 16:36:13 +0200 From: Peter Zijlstra To: Morten Rasmussen Cc: mingo@redhat.com, dietmar.eggemann@arm.com, yuyang.du@intel.com, vincent.guittot@linaro.org, mgalbraith@suse.de, linux-kernel@vger.kernel.org Subject: Re: [PATCH 09/16] sched/fair: Let asymmetric cpu configurations balance at wake-up Message-ID: <20160608143613.GM30909@twins.programming.kicks-ass.net> References: <1464001138-25063-1-git-send-email-morten.rasmussen@arm.com> <1464001138-25063-10-git-send-email-morten.rasmussen@arm.com> <20160602142105.GG28447@twins.programming.kicks-ass.net> <20160608112951.GE9187@e105550-lin.cambridge.arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20160608112951.GE9187@e105550-lin.cambridge.arm.com> User-Agent: Mutt/1.5.23.1 (2014-03-12) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Jun 08, 2016 at 12:29:52PM +0100, Morten Rasmussen wrote: > Let's take your example above and add that t0 should really be running > on cpu2/3 due to its utilization, assuming SD1[01] are little cpus and > SD1[23] are big cpus. In that case we would still do affine-wakeup and > stick the task on cpu0 despite it being a little cpu. Ah indeed.