From owner-freebsd-amd64@FreeBSD.ORG Wed Feb 25 11:00:56 2004 Return-Path: Delivered-To: freebsd-amd64@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 3446116A4CE for ; Wed, 25 Feb 2004 11:00:56 -0800 (PST) Received: from dragon.nuxi.com (trang.nuxi.com [66.93.134.19]) by mx1.FreeBSD.org (Postfix) with ESMTP id 9728543D31 for ; Wed, 25 Feb 2004 11:00:55 -0800 (PST) (envelope-from obrien@NUXI.com) Received: from dragon.nuxi.com (obrien@localhost [127.0.0.1]) by dragon.nuxi.com (8.12.10/8.12.10) with ESMTP id i1PJ0sOJ085482; Wed, 25 Feb 2004 11:00:54 -0800 (PST) (envelope-from obrien@dragon.nuxi.com) Received: (from obrien@localhost) by dragon.nuxi.com (8.12.11/8.12.11/Submit) id i1PJ0qGO085330; Wed, 25 Feb 2004 11:00:52 -0800 (PST) (envelope-from obrien) Date: Wed, 25 Feb 2004 11:00:52 -0800 From: "David O'Brien" To: Kenneth Culver Message-ID: <20040225190052.GJ7567@dragon.nuxi.com> References: <1077658664.92943.15.camel@.rochester.rr.com> <20040225110754.hcogcccokg84k44k@www.sweetdreamsracing.biz> <20040225183234.GG7567@dragon.nuxi.com> <20040225135035.v66800cwkgw08wwc@www.sweetdreamsracing.biz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20040225135035.v66800cwkgw08wwc@www.sweetdreamsracing.biz> User-Agent: Mutt/1.4.1i X-Operating-System: FreeBSD 5.2-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: Jem Matzan cc: freebsd-amd64@FreeBSD.org Subject: Re: Performance comparison, ULE vs 4BSD and AMD64 vs i386 X-BeenThere: freebsd-amd64@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Reply-To: obrien@FreeBSD.org List-Id: Porting FreeBSD to the AMD64 platform List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 25 Feb 2004 19:00:56 -0000 On Wed, Feb 25, 2004 at 01:50:35PM -0500, Kenneth Culver wrote: > Ok well maybe not with amd64, but I thought that when you add registers ^^^^^^^ This is the key word here -- "thought". No one has done any real analsys and thus we can't say jack. While at first thought compiling for a large number of GPR's could be more time consuming; I think there are other phases of code generation where the process is slower due to lack of a large number of GPR's. > Like on PowerPC or Alpha or whatever there are a LOT more GPR's than > there are on even Athlon64... I guess only having 2x the GPR's doesn't > make a whole lot of difference... PowerPC and Alpha are also RISC and have other scheduling issues for the code generator to handle. -- -- David (obrien@FreeBSD.org)