Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751248AbdGMIer (ORCPT ); Thu, 13 Jul 2017 04:34:47 -0400 Received: from bombadil.infradead.org ([65.50.211.133]:42696 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750949AbdGMIep (ORCPT ); Thu, 13 Jul 2017 04:34:45 -0400 Date: Thu, 13 Jul 2017 10:34:38 +0200 From: Peter Zijlstra To: "Paul E. McKenney" Cc: Frederic Weisbecker , Christoph Lameter , "Li, Aubrey" , Andi Kleen , Aubrey Li , tglx@linutronix.de, len.brown@intel.com, rjw@rjwysocki.net, tim.c.chen@linux.intel.com, arjan@linux.intel.com, yang.zhang.wz@gmail.com, x86@kernel.org, linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH v1 00/11] Create fast idle path for short idle periods Message-ID: <20170713083438.vaa56sdi4paouyoa@hirez.programming.kicks-ass.net> References: <20170710172705.GA3441@tassilo.jf.intel.com> <20170711094157.5xcwkloxnjehieqv@hirez.programming.kicks-ass.net> <20170711160926.GA18805@lerouge> <20170711163422.etydkhhtgfthpfi5@hirez.programming.kicks-ass.net> <20170711180931.GP2393@linux.vnet.ibm.com> <20170712122249.u6y4ymmk6qwvog57@hirez.programming.kicks-ass.net> <20170712155458.GW2393@linux.vnet.ibm.com> <20170712171756.e3fnc3waanbaiiss@hirez.programming.kicks-ass.net> <20170712184617.GZ2393@linux.vnet.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170712184617.GZ2393@linux.vnet.ibm.com> User-Agent: NeoMutt/20170609 (1.8.3) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 224 Lines: 5 On Wed, Jul 12, 2017 at 11:46:17AM -0700, Paul E. McKenney wrote: > So please let me know if rcu_needs_cpu() or rcu_prepare_for_idle() are > prominent contributors to to-idle latency. Right, some actual data would be good.