From owner-freebsd-questions@FreeBSD.ORG Wed Jan 11 15:36:58 2006 Return-Path: X-Original-To: freebsd-questions@freebsd.org Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id CE0F716A41F for ; Wed, 11 Jan 2006 15:36:58 +0000 (GMT) (envelope-from freebsd-questions-local@be-well.ilk.org) Received: from mail5.sea5.speakeasy.net (mail5.sea5.speakeasy.net [69.17.117.7]) by mx1.FreeBSD.org (Postfix) with ESMTP id 74EB143D45 for ; Wed, 11 Jan 2006 15:36:58 +0000 (GMT) (envelope-from freebsd-questions-local@be-well.ilk.org) Received: (qmail 2715 invoked from network); 11 Jan 2006 15:36:58 -0000 Received: from dsl092-078-145.bos1.dsl.speakeasy.net (HELO be-well.ilk.org) ([66.92.78.145]) (envelope-sender ) by mail5.sea5.speakeasy.net (qmail-ldap-1.03) with SMTP for ; 11 Jan 2006 15:36:57 -0000 Received: by be-well.ilk.org (Postfix, from userid 1147) id 0D86628423; Wed, 11 Jan 2006 10:36:56 -0500 (EST) Sender: lowell@be-well.ilk.org To: freebsd-questions@freebsd.org References: <20060110125050.A48499@ganymede.hub.org> From: Lowell Gilbert Date: 11 Jan 2006 10:36:56 -0500 In-Reply-To: Message-ID: <4464oq93on.fsf@be-well.ilk.org> Lines: 22 User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.3 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Subject: Re: Dual Core vs HyperThreading vs Dual CPU 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: Wed, 11 Jan 2006 15:36:58 -0000 Ceri Davies writes: > On 10 Jan 2006, at 18:06, Andrew P. wrote: > > > > By 2010 we'll see 4-core, 8-core and maybe even 16/32 solutions. > > We got those in 2005: http://www.sun.com/processors/UltraSPARC-T1/index.xml That's a little different than what Andrew was describing as "multi-core," though. His definition was that it was exactly the same as having that many separate CPUs. Sun's definition in the new UltraSPARC chips is separate ALUs but other resources are not duplicated. Perhaps most notably, there is only one floating point unit shared between all of the cores on the chip. Personally, I don't think there's a strong enough argument for one definition to be "right" and the other "wrong," so you just have to be aware which one you're using. -- Lowell Gilbert, embedded/networking software engineer, Boston area http://be-well.ilk.org/~lowell/