From owner-freebsd-current@FreeBSD.ORG Tue Jun 5 13:23:24 2007 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 6800516A4D7 for ; Tue, 5 Jun 2007 13:23:24 +0000 (UTC) (envelope-from ed@hoeg.nl) Received: from palm.hoeg.nl (mx0.hoeg.nl [83.98.131.211]) by mx1.freebsd.org (Postfix) with ESMTP id 2A59813C480 for ; Tue, 5 Jun 2007 13:23:24 +0000 (UTC) (envelope-from ed@hoeg.nl) Received: by palm.hoeg.nl (Postfix, from userid 1000) id DBA991CD11; Tue, 5 Jun 2007 15:23:20 +0200 (CEST) Date: Tue, 5 Jun 2007 15:23:20 +0200 From: Ed Schouten To: FreeBSD Current , almarrie@gmail.com, jroberson@chesapeake.net Message-ID: <20070605132320.GQ45756@hoeg.nl> References: <499c70c0706050348x3cf9e50fn929b910e7c6b0519@mail.gmail.com> <200706051316.l55DGSU0052272@lurza.secnetix.de> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="2D20dG0OqTzqkNh7" Content-Disposition: inline In-Reply-To: <200706051316.l55DGSU0052272@lurza.secnetix.de> User-Agent: Mutt/1.5.15 (2007-04-06) Cc: Subject: Re: Intel C2D COREs not used equally in FreeBSD 7.0-CURRENT i386 X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 05 Jun 2007 13:23:24 -0000 --2D20dG0OqTzqkNh7 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable * Oliver Fromme wrote: > - Most programs (though not all) will run faster, because > in amd64 mode there are twice as many general-purpose > registers, giving compilers much better opportunities > for optimizations and caching of values, and reducing > slow memory accesses. And the assumptions you can make about the processor's capabilities. It's very safe to assume an AMD64 processor has MMX and SSE, so when you ship binaries, you don't need to be conservative about this. > In practice there's (almost) only one reason not to run > FreeBSD/amd64 on amd64-capable hardware: If you depend > on a certain piece of software which is known not to run > correctly in 64bit mode. Fortunately those are not many. I guess most of those are still waiting for a 64-bits nvidia.ko. --=20 Ed Schouten WWW: http://g-rave.nl/ --2D20dG0OqTzqkNh7 Content-Type: application/pgp-signature Content-Disposition: inline -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.7 (FreeBSD) iD8DBQFGZWPI52SDGA2eCwURAvd7AJ0VQMigybeb6BasVQP0vKH+5ObW1wCdHJAJ wuJjHR8WIR0x/WPKJoEm4gY= =Lgdl -----END PGP SIGNATURE----- --2D20dG0OqTzqkNh7--