Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S265000AbTFYXXy (ORCPT ); Wed, 25 Jun 2003 19:23:54 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S265037AbTFYXXx (ORCPT ); Wed, 25 Jun 2003 19:23:53 -0400 Received: from kinesis.swishmail.com ([209.10.110.86]:18447 "HELO kinesis.swishmail.com") by vger.kernel.org with SMTP id S265000AbTFYXXw (ORCPT ); Wed, 25 Jun 2003 19:23:52 -0400 Message-ID: <3EFA32C6.5030303@techsource.com> Date: Wed, 25 Jun 2003 19:39:50 -0400 From: Timothy Miller User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Timothy Miller CC: Edward Tandi , joe briggs , Artur Jasowicz , Brian Jackson , Bart SCHELSTRAETE , Kernel mailing list Subject: Re: AMD MP, SMP, Tyan 2466 References: <200306251501.14207.jbriggs@briggsmedia.com> <1056567378.31260.9.camel@wires.home.biz> <3EFA2939.2060005@techsource.com> <1056583075.31265.22.camel@wires.home.biz> <3EFA2F97.5000705@techsource.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1121 Lines: 27 Timothy Miller wrote: > It is my understanding that the registered memory requirement has > nothing to do with SMP but instead with the amount of memory you have. > The more memory chips you have, the greater the signal loading on the > memory bus. More input drivers means more capacitance which means you > need your output drivers to put out data sooner (relative to the clock > edge, so registered delays by one clock) and stronger (greater drive > strength). > > In an SMP system (besides NUMA), multiple processors will talk to the > same memory through a shared memory controller (like in a Northbridge), > so although there are multiple processors, there is still only one > memory bus. Pulling off one CPU isn't going to change that situation. > Here's a URL: http://www.simmtester.com/PAGE/memory/memfaq.asp?cat=6&subcat=&tableView=detail&faqId=15 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/