From owner-freebsd-current@FreeBSD.ORG Thu May 7 16:26:12 2009 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id A2450106566C for ; Thu, 7 May 2009 16:26:12 +0000 (UTC) (envelope-from scottl@samsco.org) Received: from pooker.samsco.org (pooker.samsco.org [168.103.85.57]) by mx1.freebsd.org (Postfix) with ESMTP id 582818FC17 for ; Thu, 7 May 2009 16:26:12 +0000 (UTC) (envelope-from scottl@samsco.org) Received: from phobos.local (pooker.samsco.org [168.103.85.57]) by pooker.samsco.org (8.14.2/8.14.2) with ESMTP id n47GQ9U2084134; Thu, 7 May 2009 10:26:09 -0600 (MDT) (envelope-from scottl@samsco.org) Message-ID: <4A030BA1.8070709@samsco.org> Date: Thu, 07 May 2009 10:26:09 -0600 From: Scott Long User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1.13) Gecko/20080313 SeaMonkey/1.1.9 MIME-Version: 1.0 To: Ollivier Robert References: <270637.78561.qm@web63905.mail.re1.yahoo.com> <32413E83-2059-4A47-AB45-EA7A1A509DD6@gid.co.uk> <4A030ADB.9050802@keltia.freenix.fr> In-Reply-To: <4A030ADB.9050802@keltia.freenix.fr> X-Enigmail-Version: 0.95.6 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-3.9 required=3.8 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.1.8 X-Spam-Checker-Version: SpamAssassin 3.1.8 (2007-02-13) on pooker.samsco.org Cc: freebsd-current@freebsd.org Subject: Re: Hypertherading 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: Thu, 07 May 2009 16:26:12 -0000 Ollivier Robert wrote: > On 7/05/2009 10:17, Bob Bishop wrote: >> AFAICS the reference doesn't support that conclusion at all. > Nehalem CPUs'HT feature is significantly different from the one present > in previous P4 CPUs. Apparently, Nehalem's HT works. Memory bandwidth > being much higher helps too. > I keep here the anecdote that "it's better". Is there a good reference somewhere that describes exactly how it works? Scott