From owner-freebsd-hardware@FreeBSD.ORG Fri Mar 12 09:13:31 2004 Return-Path: Delivered-To: freebsd-hardware@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id A24B516A4CE for ; Fri, 12 Mar 2004 09:13:31 -0800 (PST) Received: from copper.ucsc.edu (copper.ucsc.edu [128.114.129.186]) by mx1.FreeBSD.org (Postfix) with ESMTP id 7E7AA43D1D for ; Fri, 12 Mar 2004 09:13:29 -0800 (PST) (envelope-from brianm@moffetimages.com) Received: by copper.ucsc.edu (CommuniGate Pro PIPE 4.1.8) with PIPE id 2152416; Fri, 12 Mar 2004 09:13:29 -0800 Received: from [128.114.20.94] (HELO moffetimages.com) by copper.ucsc.edu (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2152405; Fri, 12 Mar 2004 09:13:17 -0800 Date: Fri, 12 Mar 2004 09:13:43 -0800 Content-Type: text/plain; charset=US-ASCII; format=flowed Mime-Version: 1.0 (Apple Message framework v553) To: "Simon" From: Brian D.Moffet In-Reply-To: <20040312170213.BB03143D45@mx1.FreeBSD.org> Message-Id: <9D5B14F0-7448-11D8-80C3-000A957CD220@moffetimages.com> Content-Transfer-Encoding: 7bit X-Mailer: Apple Mail (2.553) X-UCSC-CATS-MailScanner-Information: This message was scanned by Mailscanner X-UCSC-CATS-MailScanner: Found to be clean X-UCSC-CATS-MailScanner-SpamCheck: not spam, SpamAssassin (score=-4.9, required 8, BAYES_00 -4.90) cc: Artem Koutchine cc: "freebsd-hardware@freebsd.org" Subject: Re: Multiprocessor system VS one processor system X-BeenThere: freebsd-hardware@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: General discussion of FreeBSD hardware List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 12 Mar 2004 17:13:31 -0000 If I remember correctly, FreeBSD (4.8 I believe) will run multiple threads of one process on multiple CPUs, correct? Or am I seeing something very odd on my multi-thread test (with 2 CPUs)? Brian On Friday, March 12, 2004, at 09:02 AM, Simon wrote: > > While FreeBSD 4.9 can only run one process per CPU, in a multi-user > environment, you will have multiple processes running on multiple CPUs > at the same time. You can't do this with 1 CPU, even if that one CPU > is faster. Of course, an outdated dual CPU server is not a lot faster > than > a 2x+ faster newer single CPU server. -- Brian D. Moffet -- Film and Digital Media Dept. 1156 High Street, Santa Cruz CA 95064 831-459-4242