From owner-freebsd-hackers Sat Mar 16 13:55:44 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from rwcrmhc51.attbi.com (rwcrmhc51.attbi.com [204.127.198.38]) by hub.freebsd.org (Postfix) with ESMTP id AC90B37B449 for ; Sat, 16 Mar 2002 13:55:40 -0800 (PST) Received: from peter3.wemm.org ([12.232.27.13]) by rwcrmhc51.attbi.com (InterMail vM.4.01.03.27 201-229-121-127-20010626) with ESMTP id <20020316215540.QXDW2626.rwcrmhc51.attbi.com@peter3.wemm.org> for ; Sat, 16 Mar 2002 21:55:40 +0000 Received: from overcee.wemm.org (overcee.wemm.org [10.0.0.3]) by peter3.wemm.org (8.11.0/8.11.0) with ESMTP id g2GLtes53523 for ; Sat, 16 Mar 2002 13:55:40 -0800 (PST) (envelope-from peter@wemm.org) Received: from wemm.org (localhost [127.0.0.1]) by overcee.wemm.org (Postfix) with ESMTP id 138EB38CC; Sat, 16 Mar 2002 13:55:40 -0800 (PST) (envelope-from peter@wemm.org) X-Mailer: exmh version 2.5 07/13/2001 with nmh-1.0.4 To: Sergey Babkin Cc: Terry Lambert , Alfred Perlstein , Jordan Hubbard , hackers@FreeBSD.ORG Subject: Re: Interesting sysctl variables in Mac OS X with hw info In-Reply-To: <3C93B5CF.CB4CCE71@bellatlantic.net> Date: Sat, 16 Mar 2002 13:55:40 -0800 From: Peter Wemm Message-Id: <20020316215540.138EB38CC@overcee.wemm.org> Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Sergey Babkin wrote: > Terry Lambert wrote: > > > > It got really bogged down when someone pointed out that > > they were running CPUs with different clock rates in their > > SMP box, just to see what the net effect would be. THe > > As far as I understand, you just physically can't do it: > the P-II CPU initialization depends on all the CPUs on the > bus running at the same rate. Or if you can do it then you still > should never do it. Unless you actually have a NUMA machine > (as opposed to an SMP machine). Nope, you most certainly can do this, I have such a box. One cpu is running at 866MHz, the other at 933MHz. The front-side-bus is the same speed though (133MHz), just the internal clock multiplier within the cpu is different. Cheers, -Peter -- Peter Wemm - peter@wemm.org; peter@FreeBSD.org; peter@yahoo-inc.com "All of this is for nothing if we don't go to the stars" - JMS/B5 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message