From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751204AbdFAM2f (ORCPT ); Thu, 1 Jun 2017 08:28:35 -0400 Received: from merlin.infradead.org ([205.233.59.134]:53558 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751056AbdFAM2e (ORCPT ); Thu, 1 Jun 2017 08:28:34 -0400 Date: Thu, 1 Jun 2017 14:28:27 +0200 From: Peter Zijlstra To: Rohit Jain Cc: linux-kernel@vger.kernel.org, mingo@redhat.com, vincent.guittot@linaro.org, morten.rasmussen@arm.com, dietmar.eggemann@arm.com Subject: Re: [PATCH] sched: Introduce scaled capacity awareness in enqueue Message-ID: <20170601122827.5ptc3n47vvk2y7k7@hirez.programming.kicks-ass.net> References: <1495486094-9097-1-git-send-email-rohit.k.jain@oracle.com> <20170530122831.5fyywtplq4jawj3j@hirez.programming.kicks-ass.net> <63736e6f-37e6-e287-a920-56ab0d0586b7@oracle.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <63736e6f-37e6-e287-a920-56ab0d0586b7@oracle.com> User-Agent: NeoMutt/20170113 (1.7.2) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 31, 2017 at 03:19:46PM -0700, Rohit Jain wrote: > > > 2) This scaled capacity is normalized and mapped into buckets. > > Why? > > This is done to deterministically define the CPUs which are low on > capacities. By mapping it into buckets it becomes easier to do a > percentile calculation. *sigh*, you're really going to make me read and reverse engineer your horrible code.. :/