Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753859AbdDKKvM (ORCPT ); Tue, 11 Apr 2017 06:51:12 -0400 Received: from merlin.infradead.org ([205.233.59.134]:46270 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752805AbdDKKt4 (ORCPT ); Tue, 11 Apr 2017 06:49:56 -0400 Date: Tue, 11 Apr 2017 12:49:49 +0200 From: Peter Zijlstra To: Vincent Guittot Cc: mingo@kernel.org, linux-kernel@vger.kernel.org, dietmar.eggemann@arm.com, Morten.Rasmussen@arm.com, yuyang.du@intel.com, pjt@google.com, bsegall@google.com Subject: Re: [PATCH v2] sched/fair: update scale invariance of PELT Message-ID: <20170411104949.eat4o37rlqiiobeu@hirez.programming.kicks-ass.net> References: <1491815909-13345-1-git-send-email-vincent.guittot@linaro.org> <20170410173802.orygigjbcpefqtdv@hirez.programming.kicks-ass.net> <20170411075221.GA30421@linaro.org> <20170411085305.aik6gdy6n3wa22ok@hirez.programming.kicks-ass.net> <20170411094021.GA17811@linaro.org> <20170411104136.33hkvzlmoa7zc72l@hirez.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20170411104136.33hkvzlmoa7zc72l@hirez.programming.kicks-ass.net> User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 263 Lines: 14 Lets go back to the unscaled version: running idle |*********|---------| With the current code, that would effectively end up like (again assuming 50%): running idle |*_*_*_*_*|---------| Time stays the same, but we add extra idle cycles.