From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750719AbWHQX4F (ORCPT ); Thu, 17 Aug 2006 19:56:05 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751233AbWHQX4F (ORCPT ); Thu, 17 Aug 2006 19:56:05 -0400 Received: from omta03ps.mx.bigpond.com ([144.140.82.155]:9319 "EHLO omta03ps.mx.bigpond.com") by vger.kernel.org with ESMTP id S1750719AbWHQX4E (ORCPT ); Thu, 17 Aug 2006 19:56:04 -0400 Message-ID: <44E50210.4060102@bigpond.net.au> Date: Fri, 18 Aug 2006 09:56:00 +1000 From: Peter Williams User-Agent: Thunderbird 1.5.0.5 (X11/20060808) MIME-Version: 1.0 To: Paul Jackson CC: "Siddha, Suresh B" , akpm@osdl.org, linux-kernel@vger.kernel.org, nickpiggin@yahoo.com.au, mingo@redhat.com, apw@shadowen.org Subject: Re: [patch] sched: group CPU power setup cleanup References: <20060815175525.A2333@unix-os.sc.intel.com> <20060815212455.c9fe1e34.pj@sgi.com> <20060815214718.00814767.akpm@osdl.org> <20060816110357.B7305@unix-os.sc.intel.com> <20060817102030.f8c41330.pj@sgi.com> In-Reply-To: <20060817102030.f8c41330.pj@sgi.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Authentication-Info: Submitted using SMTP AUTH PLAIN at omta03ps.mx.bigpond.com from [147.10.128.202] using ID pwil3058@bigpond.net.au at Thu, 17 Aug 2006 23:56:01 +0000 Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Paul Jackson wrote: >>> Hope not. To me, "computing power" means megaflops/sec, or Dhrystones >>> (don't ask) or whatever. If that's what "cpu_power" is referring to then >>> the name is hopelessly ambiguous with peak joules/sec and a big renaming is >>> due. >> It refers to group's processing power. Perhaps "horsepower" is better term. > > Well ... I don't think "horsepower" is a step in the right direction. > > Andrew's point was over the word "power", not "cpu". The term > "cpu_power" suggested to him we were concerned with the power supply > watts consumed by a group of CPUs. Indeed, both those concerned with > laptop battery lifetimes, and the air conditioning tonnage needed > for big honkin NUMA iron might have reason to be concerned with the > power consumed by CPUs. > > Changing the word "cpu" to "horse", but keeping the word "power", > does nothing to address Andrew's point. Rather it just adds more > confusion. We are obviously dealing with CPUs here, not horses. > > My understanding is that the "cpu_power" of the cpus in a sched group > is rougly proportional to the BogoMIPS of the CPUs in that group. > How about energy instead of power? I.e. the CPU's capacity to do work. Peter -- Peter Williams pwil3058@bigpond.net.au "Learning, n. The kind of ignorance distinguishing the studious." -- Ambrose Bierce