From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1030189AbWHQRUr (ORCPT ); Thu, 17 Aug 2006 13:20:47 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1030187AbWHQRUr (ORCPT ); Thu, 17 Aug 2006 13:20:47 -0400 Received: from omx2-ext.sgi.com ([192.48.171.19]:61326 "EHLO omx2.sgi.com") by vger.kernel.org with ESMTP id S1030186AbWHQRUq (ORCPT ); Thu, 17 Aug 2006 13:20:46 -0400 Date: Thu, 17 Aug 2006 10:20:30 -0700 From: Paul Jackson To: "Siddha, Suresh B" Cc: akpm@osdl.org, suresh.b.siddha@intel.com, 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: <20060817102030.f8c41330.pj@sgi.com> In-Reply-To: <20060816110357.B7305@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> 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 > > 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. -- I won't rest till it's the best ... Programmer, Linux Scalability Paul Jackson 1.925.600.0401