From owner-freebsd-current@FreeBSD.ORG Fri Dec 15 20:43:03 2006 Return-Path: X-Original-To: freebsd-current@freebsd.org Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 48C6216A415 for ; Fri, 15 Dec 2006 20:43:03 +0000 (UTC) (envelope-from obrien@NUXI.org) Received: from dragon.NUXI.org (trang.nuxi.org [66.93.134.19]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7D5D443C9E for ; Fri, 15 Dec 2006 20:41:19 +0000 (GMT) (envelope-from obrien@NUXI.org) Received: from dragon.NUXI.org (obrien@localhost [127.0.0.1]) by dragon.NUXI.org (8.13.8/8.13.8) with ESMTP id kBFKh2J2055419; Fri, 15 Dec 2006 12:43:02 -0800 (PST) (envelope-from obrien@dragon.NUXI.org) Received: (from obrien@localhost) by dragon.NUXI.org (8.13.8/8.13.7/Submit) id kBFKh1mJ055418; Fri, 15 Dec 2006 12:43:01 -0800 (PST) (envelope-from obrien) Date: Fri, 15 Dec 2006 12:43:01 -0800 From: "David O'Brien" To: Steve Kargl Message-ID: <20061215204301.GA55276@dragon.NUXI.org> Mail-Followup-To: freebsd-current@freebsd.org, Steve Kargl References: <20061213192150.CF83D16A417@hub.freebsd.org> <20061214183026.GA1532@turion.vk2pj.dyndns.org> <4581A3E3.9060807@samsco.org> <200612151450.39260.doconnor@gsoft.com.au> <20061215044453.GB9381@troutmask.apl.washington.edu> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20061215044453.GB9381@troutmask.apl.washington.edu> X-Operating-System: FreeBSD 7.0-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 User-Agent: Mutt/1.5.11 Cc: freebsd-current@freebsd.org Subject: Re: Let's use gcc-4.2, not 4.1 -- OpenMP X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list Reply-To: freebsd-current@freebsd.org List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 15 Dec 2006 20:43:03 -0000 On Thu, Dec 14, 2006 at 08:44:53PM -0800, Steve Kargl wrote: > On Fri, Dec 15, 2006 at 02:50:30PM +1030, Daniel O'Connor wrote: > > On Friday 15 December 2006 05:50, Scott Long wrote: > > > Yes, the industry moves fast, but that's no reason to fool ourselves > > > into thinking that the FSF will support GCC 4.2 a day after they release > > > 4.3 and start working on 4.4. Your point above about the lifespan of > > > FreeBSD 7.x is a valid one, and I agree that it should be a > > > consideration. Vendor support is a myth and should not be a > > > consideration. > > > > Not to mention it is *trivial* to install a compiler using ports or packages. > > > > If you are serious about high performance computing installing a new compiler > > is about the lowest barrier you'll find. > > > > Actually, 4.1.x will produce much worse code than 3.4.6. > You can search the gcc mail listings for extensive comparison > by Clinton Whaley (the author of math/atlas) for details. It depends on the type of code and benchmark. Clinton's code is mostly FP. I've seen other benchmarks that show an improvment with 4.1.x over 3.4.6 and 4.2 does even better. -- -- David (obrien@FreeBSD.org)