From owner-freebsd-hackers Wed Mar 13 20:47:31 2002 Delivered-To: freebsd-hackers@freebsd.org Received: from snipe.prod.itd.earthlink.net (snipe.mail.pas.earthlink.net [207.217.120.62]) by hub.freebsd.org (Postfix) with ESMTP id A5D6037B420 for ; Wed, 13 Mar 2002 20:47:19 -0800 (PST) Received: from pool0454.cvx22-bradley.dialup.earthlink.net ([209.179.199.199] helo=mindspring.com) by snipe.prod.itd.earthlink.net with esmtp (Exim 3.33 #1) id 16lN8z-0000Ee-00; Wed, 13 Mar 2002 20:47:13 -0800 Message-ID: <3C902B36.4D4EB8E@mindspring.com> Date: Wed, 13 Mar 2002 20:46:46 -0800 From: Terry Lambert X-Mailer: Mozilla 4.7 [en]C-CCK-MCD {Sony} (Win98; U) X-Accept-Language: en MIME-Version: 1.0 To: Matthew Emmerton Cc: hackers@FreeBSD.ORG Subject: Re: Interesting sysctl variables in Mac OS X with hw info References: <006601c1cb06$b9f07370$1200a8c0@gsicomp.on.ca> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit 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 Matthew Emmerton wrote: > > > > This was actually discussed a while back (a month or two ago). > > > > > > > > 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 > > > > problem was, of course, which one do you report, when the > > > > numbers don't match exactly, and/or how do you report both > > > > (or N)? > > I thought it was a real bad thing to run CPUs in SMP systems at different > clock rates. In fact, I never thought it was possible. I know I can't on > my old 2-way P166 box, but things have changed a lot since '91. It depends on the stepping, and that the external interfaces are all the same (voltage, clock speed for memory and I/O, etc.). PIII's can run this way, for sure. If you want to find out who's doing it, you only need to search the SMP list archives; it wasn't important enough for me to commit the message to memory, I only remember the fact that someone was doing it successfully. -- Terry To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message