From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751239AbWHQTSQ (ORCPT ); Thu, 17 Aug 2006 15:18:16 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1751256AbWHQTSQ (ORCPT ); Thu, 17 Aug 2006 15:18:16 -0400 Received: from omx2-ext.sgi.com ([192.48.171.19]:52888 "EHLO omx2.sgi.com") by vger.kernel.org with ESMTP id S1751239AbWHQTSP (ORCPT ); Thu, 17 Aug 2006 15:18:15 -0400 Date: Thu, 17 Aug 2006 12:18:04 -0700 From: Paul Jackson To: "Siddha, Suresh B" Cc: suresh.b.siddha@intel.com, 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 Message-Id: <20060817121804.e140f19e.pj@sgi.com> In-Reply-To: <20060817110317.A14787@unix-os.sc.intel.com> 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> <20060817110317.A14787@unix-os.sc.intel.com> Organization: SGI X-Mailer: Sylpheed version 2.2.4 (GTK+ 2.8.3; i686-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Suresh wrote: > Let me resist the temptation and not go into the definition of horsepower > here. You can refer any dictionary. Good point . Horsepower is a measure of power, of energy over time, such as the rate of providing or using electrical or mechanical energy. So, with your suggestion of 'horsepower', are you saying that cpu_power is a metric of such electrical or mechanical energy -- the peak or average watts of the electricity consumed by the CPUs in a group? Or is 'cpu_power' a metric of the computational capacity, such as BogoMIPS provided by the CPUs in a group, such as I had presumed? Hmmm ... apparently from your latest explanation, it's neither of these. Rather it's a metric of how many tasks to place in a group, due to various capacities and constraints, such as computational power (BogoMIPS) and electrical power (watts or horsepower). Should 'cpu_power' be renamed to 'task_load' ? -- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson 1.925.600.0401