From owner-freebsd-ia64@FreeBSD.ORG Sun Nov 8 01:42:47 2009 Return-Path: Delivered-To: ia64@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 9D601106566B for ; Sun, 8 Nov 2009 01:42:47 +0000 (UTC) (envelope-from peterc@gelato.unsw.edu.au) Received: from lemon.ken.nicta.com.au (lemon.ertos.nicta.com.au [203.143.174.143]) by mx1.freebsd.org (Postfix) with ESMTP id 53A878FC17 for ; Sun, 8 Nov 2009 01:42:47 +0000 (UTC) Received: from c220-239-171-171.farfl1.nsw.optusnet.com.au ([220.239.171.171]:39282 helo=quokka.chubb.wattle.id.au) by lemon.ken.nicta.com.au with esmtpsa (TLSv1:AES256-SHA:256) (Exim 4.69) (envelope-from ) id 1N6wHo-0002tS-NV; Sun, 08 Nov 2009 12:09:49 +1100 Received: from localhost ([127.0.0.1] helo=localhost.chubb.wattle.id.au) by localhost with esmtp (Exim 4.69) (envelope-from ) id 1N6wH3-0001fh-GE; Sun, 08 Nov 2009 12:08:57 +1100 Date: Sun, 08 Nov 2009 12:08:57 +1100 Message-ID: <87hbt5yg9i.wl%peter@chubb.wattle.id.au> From: Peter Chubb To: Anton Shterenlikht In-Reply-To: <20091107232251.GA33482@mech-cluster241.men.bris.ac.uk> References: <595329F2-46F2-4393-B8E3-0923694D250D@mac.com> <20091107214031.GB78634@mech-cluster241.men.bris.ac.uk> <4AF5F413.7010302@osunix.org> <20091107232251.GA33482@mech-cluster241.men.bris.ac.uk> User-Agent: Wanderlust/2.14.0 (Africa) SEMI/1.14.6 (Maruoka) FLIM/1.14.9 (=?ISO-8859-4?Q?Goj=F2?=) APEL/10.7 MULE XEmacs/21.4 (patch 22) (Instant Classic) (i486-linux-gnu) Organization: Gelato@UNSW MIME-Version: 1.0 (generated by SEMI 1.14.6 - "Maruoka") Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable X-SA-Exim-Connect-IP: 220.239.171.171 X-SA-Exim-Mail-From: peterc@gelato.unsw.edu.au X-Spam-Checker-Version: SpamAssassin 3.2.5 (2008-06-10) on lemon.ken.nicta.com.au X-Spam-Level: X-Spam-Status: No, score=-4.3 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.2.5 X-SA-Exim-Version: 4.2.1 (built Wed, 25 Jun 2008 17:20:11 +0000) X-SA-Exim-Scanned: Yes (on lemon.ken.nicta.com.au) Cc: Michael Dexter , ia64@freebsd.org Subject: Re: 2009 Update X-BeenThere: freebsd-ia64@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Porting FreeBSD to the IA-64 List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 08 Nov 2009 01:42:47 -0000 >>>>> "Anton" =3D=3D Anton Shterenlikht writes: Anton> On Sat, Nov 07, 2009 at 05:26:27PM -0500, "C. Bergstr=F6m" wrote: Anton> There are 6 ia64 systems on top500 list (details below). All Anton> run linux, of course. But these organisations must use very Anton> good compilers, and, at least for nuclear codes (systems 71 and Anton> 96), these will be f90-f95 or even f2003 (I don't know of any Anton> f2008) compilers. Perhaps they do use PathScale and forget Anton> about GCC.. Most use the Intel compiler, and heavy hand-optimization of inner loops using tools like vTune. Gelato put a lot of effort into imprving gcc for IA64 -- gcc 4.x is miles better than gcc 3.x -- but there's still a lot that could be done with low-level instruction scheduling. Peter C -- Dr Peter Chubb www.nicta.com.au peter DOT chubb AT nicta.com.au http://www.ertos.nicta.com.au ERTOS within National ICT Australia