Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933787Ab3GPUR1 (ORCPT ); Tue, 16 Jul 2013 16:17:27 -0400 Received: from merlin.infradead.org ([205.233.59.134]:47494 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933497Ab3GPUR0 (ORCPT ); Tue, 16 Jul 2013 16:17:26 -0400 Date: Tue, 16 Jul 2013 22:17:02 +0200 From: Peter Zijlstra To: Arjan van de Ven Cc: Morten Rasmussen , mingo@kernel.org, vincent.guittot@linaro.org, preeti@linux.vnet.ibm.com, alex.shi@intel.com, efault@gmx.de, pjt@google.com, len.brown@intel.com, corbet@lwn.net, akpm@linux-foundation.org, torvalds@linux-foundation.org, tglx@linutronix.de, catalin.marinas@arm.com, linux-kernel@vger.kernel.org, linaro-kernel@lists.linaro.org Subject: Re: [RFC][PATCH 0/9] sched: Power scheduler design proposal Message-ID: <20130716201702.GW17211@twins.programming.kicks-ass.net> References: <51E166C8.3000902@linux.intel.com> <20130715195914.GC23818@dyad.programming.kicks-ass.net> <51E45E8B.705@linux.intel.com> <20130715210650.GF23818@dyad.programming.kicks-ass.net> <20130715211230.GG23818@dyad.programming.kicks-ass.net> <51E47D30.5030203@linux.intel.com> <20130716173848.GA22795@dyad.programming.kicks-ass.net> <51E5947F.4090109@linux.intel.com> <20130716192145.GV17211@twins.programming.kicks-ass.net> <51E5A5AE.7010903@linux.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <51E5A5AE.7010903@linux.intel.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: 978 Lines: 18 On Tue, Jul 16, 2013 at 12:57:34PM -0700, Arjan van de Ven wrote: > then the question of how much remaining capacity; this is a hard one, and not just > for Intel. Almost all mobile devices today are thermally constrained, ARM and Intel > alike (at least the higher performance ones)... the curse of wanting very thin and light > phones that are made of thermally isolating plastic (so that radio waves can go through) > and have a nice and bright screen... Right, so we might need to track a !idle avg over the thermal domain to guestimate the head-room and inter-cpu relations. But yeah, I suppose what I've been saying is that we need to drag cpufreq into the SMP era. Only considering a single cpu isn't going to work anymore. -- 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/