Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753860AbdGNQ0X (ORCPT ); Fri, 14 Jul 2017 12:26:23 -0400 Received: from mga09.intel.com ([134.134.136.24]:23174 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753522AbdGNQ0V (ORCPT ); Fri, 14 Jul 2017 12:26:21 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.40,359,1496127600"; d="scan'208";a="286964255" Date: Fri, 14 Jul 2017 09:26:19 -0700 From: Andi Kleen To: Peter Zijlstra Cc: "Li, Aubrey" , Frederic Weisbecker , Christoph Lameter , Aubrey Li , tglx@linutronix.de, len.brown@intel.com, rjw@rjwysocki.net, tim.c.chen@linux.intel.com, arjan@linux.intel.com, paulmck@linux.vnet.ibm.com, yang.zhang.wz@gmail.com, x86@kernel.org, linux-kernel@vger.kernel.org, daniel.lezcano@linaro.org Subject: Re: [RFC PATCH v1 00/11] Create fast idle path for short idle periods Message-ID: <20170714162619.GJ3441@tassilo.jf.intel.com> References: <20170712213240.GE3441@tassilo.jf.intel.com> <20170713083649.febfflfl5hafkko5@hirez.programming.kicks-ass.net> <16e12e23-6b28-f174-7c4b-4d719225cd3b@linux.intel.com> <20170713145311.z4zxlyd2dospeoqg@hirez.programming.kicks-ass.net> <4a577bd6-20b1-abb6-2153-f9870f0a721e@linux.intel.com> <20170713182820.sn3fjitnd3mca27p@hirez.programming.kicks-ass.net> <31170ac6-9db1-f0b8-4841-f1661c8ed6e1@linux.intel.com> <20170714153818.pjauqxebxyhs6ljp@hirez.programming.kicks-ass.net> <20170714155356.GH3441@tassilo.jf.intel.com> <20170714160648.tg2u6eo2id6gmnjz@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170714160648.tg2u6eo2id6gmnjz@hirez.programming.kicks-ass.net> User-Agent: Mutt/1.8.0 (2017-02-23) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 495 Lines: 13 > And as said; Daniel has been working on a better predictor -- now he's > probably not used it on the network workload you're looking at, so that > might be something to consider. Deriving a better idle predictor is a bit orthogonal to fast idle. It would be a good idea to set the fast idle threshold to be the same as intel_idle would use on that platform and rerun the benchmarks Then the Cx pattern should be mostly identical, and fast idle can be evaluated on its own benefits. -Andi