Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754214AbbBTLex (ORCPT ); Fri, 20 Feb 2015 06:34:53 -0500 Received: from casper.infradead.org ([85.118.1.10]:51199 "EHLO casper.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754007AbbBTLew (ORCPT ); Fri, 20 Feb 2015 06:34:52 -0500 Date: Fri, 20 Feb 2015 12:34:47 +0100 From: Peter Zijlstra To: Morten Rasmussen Cc: Vincent Guittot , "mingo@kernel.org" , "linux-kernel@vger.kernel.org" , "preeti@linux.vnet.ibm.com" , "kamalesh@linux.vnet.ibm.com" , "riel@redhat.com" , "efault@gmx.de" , "nicolas.pitre@linaro.org" , Dietmar Eggemann , "linaro-kernel@lists.linaro.org" Subject: Re: [PATCH RESEND v9 00/10] sched: consolidation of CPU capacity and usage Message-ID: <20150220113447.GO5029@twins.programming.kicks-ass.net> References: <1421316570-23097-1-git-send-email-vincent.guittot@linaro.org> <20150219124940.GA22059@e105550-lin.cambridge.arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20150219124940.GA22059@e105550-lin.cambridge.arm.com> 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 Content-Length: 629 Lines: 13 On Thu, Feb 19, 2015 at 12:49:40PM +0000, Morten Rasmussen wrote: > Also, it still not clear why patch 10 uses relative capacity reduction > instead of absolute capacity available to CFS tasks. As present in your asymmetric big and small systems? Yes it would be unfortunate to migrate a task to an idle small core when the big core is still faster, even if reduced by rt/irq work. -- 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/