From owner-freebsd-questions@FreeBSD.ORG Thu Sep 18 12:52:00 2008 Return-Path: Delivered-To: questions@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 71F791065674 for ; Thu, 18 Sep 2008 12:52:00 +0000 (UTC) (envelope-from andrewberry@sentex.net) Received: from aeryn.cs.uoguelph.ca (aeryn.cs.uoguelph.ca [131.104.20.160]) by mx1.freebsd.org (Postfix) with ESMTP id 275D58FC29 for ; Thu, 18 Sep 2008 12:51:59 +0000 (UTC) (envelope-from andrewberry@sentex.net) Received: from joker.cs.uoguelph.ca (courier.mail.uoguelph.ca [131.104.93.56]) by aeryn.cs.uoguelph.ca (8.13.1/8.13.1) with ESMTP id m8ICpwwl010983; Thu, 18 Sep 2008 08:51:58 -0400 Received: from [131.104.10.192] ([131.104.10.192]) (authenticated bits=0) by joker.cs.uoguelph.ca (8.13.6/8.13.6) with ESMTP id m8ICpvMU006611 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO); Thu, 18 Sep 2008 08:51:58 -0400 Message-Id: <6064616F-F11C-4EE9-8902-2646E5F6DCB5@sentex.net> From: Andrew Berry To: Kris Kennaway In-Reply-To: <48D1F715.2070107@FreeBSD.org> Content-Type: multipart/signed; boundary=Apple-Mail-844-769461175; micalg=sha1; protocol="application/pkcs7-signature" Mime-Version: 1.0 (Apple Message framework v929.2) Date: Thu, 18 Sep 2008 08:51:50 -0400 References: <7D3E2F4C-5CF8-4DCA-8B8F-5AF2015250B1@sentex.net> <48D1F715.2070107@FreeBSD.org> X-Mailer: Apple Mail (2.929.2) X-Spam-Scanner: SpamAssassin 3.001001 (http://www.spamassassin.org/) on joker.cs.uoguelph.ca X-Spam-Score: hits=0.8 X-Spam-Level: * X-Spam-Tests: SPF_SOFTFAIL X-Spam-Status: Suspected X-Scanned-By: MIMEDefang 2.63 on 131.104.20.161 X-Scanned-By: MIMEDefang 2.56 on 172.17.94.84 X-Content-Filtered-By: Mailman/MimeDel 2.1.5 Cc: questions@freebsd.org Subject: Re: Upgrading to 64 bit from a 32 bit installation on FBSD 7 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 Sep 2008 12:52:00 -0000 --Apple-Mail-844-769461175 Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes Content-Transfer-Encoding: 7bit On 18-Sep-08, at 2:37 AM, Kris Kennaway wrote: > Andrew Berry wrote: >> Can I simply rebuild the world (or use freebsd-update), and >> portupgrade everything to rebuild for amd64? Or, will things break >> as libraries are upgraded which still have 32-bit dependancies on >> the system? > > This is a pretty common question, did you try searching the archives > or google for the answer? Yes, I did, and was quite surprised when I didn't find a clear answer :) >> Also, AFAIK upgrading to a 64 bit system allows access to >> additional registers on the CPU, leading to a performance increase. >> The system will only have 1.5 gigs of RAM, so that's not an issue, >> but are there any benchmarks out there comparing performance on < >> 4GB hardware with 32 bit and 64 bit Freebsd? > > Performance is not a single number. Sometimes 64-bit systems can be > slower, sometimes faster. Run it on your own workload or look for a > narrowly tailored benchmark and see what happens for you. The main workload on this machine is SpamAssassin and gcc (for updating ports). So I guess I'll have to look into Perl specifically then. Thanks, --Andrew --Apple-Mail-844-769461175--