From owner-freebsd-alpha@FreeBSD.ORG Fri Jan 14 18:11:32 2005 Return-Path: Delivered-To: freebsd-alpha@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 9EF2016A4CE for ; Fri, 14 Jan 2005 18:11:32 +0000 (GMT) Received: from dragon.nuxi.com (trang.nuxi.com [66.93.134.19]) by mx1.FreeBSD.org (Postfix) with ESMTP id 47C8C43D55 for ; Fri, 14 Jan 2005 18:11:32 +0000 (GMT) (envelope-from obrien@NUXI.com) Received: from dragon.nuxi.com (obrien@localhost [127.0.0.1]) by dragon.nuxi.com (8.13.1/8.13.1) with ESMTP id j0EIBMhf025414; Fri, 14 Jan 2005 10:11:22 -0800 (PST) (envelope-from obrien@dragon.nuxi.com) Received: (from obrien@localhost) by dragon.nuxi.com (8.13.1/8.13.1/Submit) id j0EIBLJn025413; Fri, 14 Jan 2005 10:11:21 -0800 (PST) (envelope-from obrien) Date: Fri, 14 Jan 2005 10:11:21 -0800 From: "David O'Brien" To: Wilko Bulte Message-ID: <20050114181121.GC12260@dragon.nuxi.com> References: <16866.32790.398095.651691@canoe.dclg.ca> <20050114002651.GD29445@dragon.nuxi.com> <20050114074336.GA97061@freebie.xs4all.nl> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20050114074336.GA97061@freebie.xs4all.nl> User-Agent: Mutt/1.4.1i X-Operating-System: FreeBSD 6.0-CURRENT Organization: The NUXI BSD Group X-Pgp-Rsa-Fingerprint: B7 4D 3E E9 11 39 5F A3 90 76 5D 69 58 D9 98 7A X-Pgp-Rsa-Keyid: 1024/34F9F9D5 cc: freebsd-alpha@freebsd.org Subject: Re: processor type. X-BeenThere: freebsd-alpha@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: obrien@freebsd.org List-Id: Porting FreeBSD to the Alpha List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 14 Jan 2005 18:11:32 -0000 On Fri, Jan 14, 2005 at 08:43:37AM +0100, Wilko Bulte wrote: > On Thu, Jan 13, 2005 at 04:26:51PM -0800, David O'Brien wrote.. > > That said, you should remove the -mtune=ev5 or change it to -mtune=ev4. > > My guess is you won't notice a difference, but this this change will > > produce the best code for your machine. > > Any idea how drastic -mtune=ev6 would change things on a DS10 (to name > a random box ;-) ? > > Am I correct in assuming that -mcpu=ev4 will result in not using the BWX > etc of the newer CPUs? And that -mcpu=ev6 will result in code that does > not run on anything older than EV6 due to missing instructions etc? Yes, you certainly want to use -mcpu=ev6 on your own DS10. :-) Along with -mtune=ev6 or no -mtune. -- -- David (obrien@FreeBSD.org)