From owner-freebsd-hackers@FreeBSD.ORG Mon Feb 23 08:12:39 2004 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id D8AFC16A4CE; Mon, 23 Feb 2004 08:12:39 -0800 (PST) Received: from harmony.village.org (rover.bsdimp.com [204.144.255.66]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1A66943D1F; Mon, 23 Feb 2004 08:12:39 -0800 (PST) (envelope-from imp@bsdimp.com) Received: from localhost (warner@rover2.village.org [10.0.0.1]) by harmony.village.org (8.12.10/8.12.9) with ESMTP id i1NGCakj030669; Mon, 23 Feb 2004 09:12:36 -0700 (MST) (envelope-from imp@bsdimp.com) Date: Mon, 23 Feb 2004 09:12:05 -0700 (MST) Message-Id: <20040223.091205.31502112.imp@bsdimp.com> To: hawkeyd@visi.com From: "M. Warner Losh" In-Reply-To: <20040222172039.GA25979@sheol.localdomain> References: <20040222150723.GA25548@sheol.localdomain> <20040222161211.GB35539@marvin.home.local> <20040222172039.GA25979@sheol.localdomain> X-Mailer: Mew version 3.3 on Emacs 21.3 / Mule 5.0 (SAKAKI) Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit cc: freebsd-hackers@freebsd.org cc: tfrank@optushome.com.au cc: freebsd-questions@freebsd.org Subject: Re: Clarification needed on Handbook: Tracking for Multiple Machines X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 23 Feb 2004 16:12:40 -0000 In message: <20040222172039.GA25979@sheol.localdomain> D J Hawkey Jr writes: : True or False: Setting CPUTYPE to the lowest target CPU ("p2") in : a build machine's make.conf will cripple the performance of target : machines with higher CPUs ("p3", "p4", "i586", "i686", etc.). False. It might have a minor impact on performance, but not a major one. At least in my experience. Minor here means < 10% for something like the world stone. Cripple to me implies > 25%. : If "True", for optimized code across all machines, the code should : just be built on each machine, right? That would give slightly better performance. However, it can be more pain than it is worth if the number of machine types is high. Warner