Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756408Ab3C2RkM (ORCPT ); Fri, 29 Mar 2013 13:40:12 -0400 Received: from mail-qa0-f43.google.com ([209.85.216.43]:44572 "EHLO mail-qa0-f43.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756268Ab3C2RkJ (ORCPT ); Fri, 29 Mar 2013 13:40:09 -0400 Date: Fri, 29 Mar 2013 10:40:03 -0700 From: Tejun Heo To: Viresh Kumar Cc: pjt@google.com, paul.mckenney@linaro.org, tglx@linutronix.de, mingo@redhat.com, peterz@infradead.org, rostedt@goodmis.org, linaro-kernel@lists.linaro.org, robin.randhawa@arm.com, Steve.Bannister@arm.com, Liviu.Dudau@arm.com, charles.garcia-tobin@arm.com, Arvind.Chauhan@arm.com, linux-rt-users@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH V3 3/7] workqueue: Add helpers to schedule work on any cpu Message-ID: <20130329174003.GA9862@htj.dyndns.org> References: <20130321001211.GC31256@htj.dyndns.org> <20130321182937.GB20500@htj.dyndns.org> <20130328181332.GD14088@htj.dyndns.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1445 Lines: 42 Hello, Viresh. On Fri, Mar 29, 2013 at 12:57:23PM +0530, Viresh Kumar wrote: > On 28 March 2013 23:43, Tejun Heo wrote: > > Viresh, would it be difficult to make another measurement of the same > > workload with the said workqueues converted to unbound? I think that > > would at least provide a nice reference point. > > My heart is shattered after getting the results :) > > > Cluster A15 Energy Cluster A7 Energy Total > ------------------------- ----------------------- ------ > > Without this patchset (Energy in Joules): > --------------------------------------------------- > 0.322866 2.619137 2.942003 > > > With this patchset (Energy in Joules): > ----------------------------------------------- > 0.182721 2.443745 2.626466 > > > With WQ Unbound (Energy in Joules): > ----------------------------------------------- > 0.2289042 2.2514632 2.4803674 So the scheduler does know what it's doing after all, which is a nice news. Given the result, the best thing to do would be somehow marking these workqueues as unbound for powersaving? Thanks! -- tejun -- 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/