Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751466AbdGQTyM (ORCPT ); Mon, 17 Jul 2017 15:54:12 -0400 Received: from Galois.linutronix.de ([146.0.238.70]:33561 "EHLO Galois.linutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751316AbdGQTyK (ORCPT ); Mon, 17 Jul 2017 15:54:10 -0400 Date: Mon, 17 Jul 2017 21:53:51 +0200 (CEST) From: Thomas Gleixner To: Arjan van de Ven cc: Peter Zijlstra , Andi Kleen , "Li, Aubrey" , Frederic Weisbecker , Christoph Lameter , Aubrey Li , len.brown@intel.com, rjw@rjwysocki.net, tim.c.chen@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 In-Reply-To: Message-ID: References: <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> <20170714162619.GJ3441@tassilo.jf.intel.com> <20170717192309.ubn5muvc3u7htuaw@hirez.programming.kicks-ass.net> User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 483 Lines: 15 On Mon, 17 Jul 2017, Arjan van de Ven wrote: > On 7/17/2017 12:23 PM, Peter Zijlstra wrote: > > Of course, this all assumes a Gaussian distribution to begin with, if we > > get bimodal (or worse) distributions we can still get it wrong. To fix > > that, we'd need to do something better than what we currently have. > > > > fwiw some time ago I made a chart for predicted vs actual so you can sort > of judge the distribution of things visually Predicted by what? Thanks, tglx