From owner-freebsd-hardware@FreeBSD.ORG Mon Mar 15 23:15:47 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 6DBC816A4CE for ; Mon, 15 Mar 2004 23:15:47 -0800 (PST) Received: from santiago.pacific.net.sg (santiago.pacific.net.sg [203.120.90.135]) by mx1.FreeBSD.org (Postfix) with SMTP id 6411943D39 for ; Mon, 15 Mar 2004 23:15:44 -0800 (PST) (envelope-from oceanare@pacific.net.sg) Received: (qmail 30837 invoked from network); 16 Mar 2004 07:15:42 -0000 Received: from unknown (HELO maxwell2.pacific.net.sg) (203.120.90.192) by santiago with SMTP; 16 Mar 2004 07:15:42 -0000 Received: from pacific.net.sg ([210.24.203.19]) by maxwell2.pacific.net.sg with ESMTP id <20040316071541.HIYC1277.maxwell2.pacific.net.sg@pacific.net.sg>; Tue, 16 Mar 2004 15:15:41 +0800 Message-ID: <4056A99D.8090406@pacific.net.sg> Date: Tue, 16 Mar 2004 15:15:41 +0800 From: Erich Dollansky Organization: oceanare pte ltd User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.6) Gecko/20040113 X-Accept-Language: en, en-us, de MIME-Version: 1.0 To: Artem Koutchine References: <002f01c4081c$bd720810$0c00a8c0@artem> <40568DC4.7020209@pacific.net.sg> <026901c40b22$2c557c50$0c00a8c0@artem> In-Reply-To: <026901c40b22$2c557c50$0c00a8c0@artem> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit 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: Tue, 16 Mar 2004 07:15:47 -0000 Hi, Artem Koutchine wrote: > Hm.. > Let me make up a case. > Two boxes: > 1) Dual CPU X Mhz with Y KB of cache > 2) Sinnge CPU with 2X Mhz and 2Y KB of cache > > Which one is faster under FreeBSD? I think the > second one, because SMP overhead is gone. > It still depends on the program you run. The individual task will be completed faster on system 2 but the overall performance will be better on system one. System 2 has always to stop a task when switching to another one. System 1 can run two task at the same moment of time. Erich