From owner-freebsd-questions Thu Mar 11 19:53:26 1999 Delivered-To: freebsd-questions@freebsd.org Received: from magi.primenet.com (magi.primenet.com [206.165.0.136]) by hub.freebsd.org (Postfix) with ESMTP id B527614C15 for ; Thu, 11 Mar 1999 19:52:48 -0800 (PST) (envelope-from scarter@magi.primenet.com) Received: (from scarter@localhost) by magi.primenet.com (8.9.3/8.9.1) id UAA26455; Thu, 11 Mar 1999 20:52:19 -0700 (MST) Date: Thu, 11 Mar 1999 20:52:19 -0700 From: Steve Carter To: Laurence Berland Cc: questions@FreeBSD.ORG Subject: Re: SMP Message-ID: <19990311205219.A26443@globalcenter.net> References: <36E885C4.A9AB6707@confusion.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.95i In-Reply-To: <36E885C4.A9AB6707@confusion.net>; from Laurence Berland on Thu, Mar 11, 1999 at 10:11:00PM -0500 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Symetrical Multi-Processing is multiple processors working in parallel, therefore you get (close to) double the performance from an SMP machine than you would for a single procesor machine with similar processors. For instance, I have an SMP machine that uses two 233MMX processors and it screams. I have another machine that is a single 233MMX (those chips are cheap..>;) and it seems to crawl by comparision. One thing to be aware of is that on an SMP system processes run on one or other of the processors and are not shared between the two. This is a benefit and also a disappointment for some. Don't think that Doom will run any faster/better on a 2x233MMX as on a single 233MMX, because it won't. IMO, advantages of SMP are lower cost per MIP and they are really good for applications that fork processes (web server, compilations, etc.). By it's nature, Unix forks processes to is suited very well to multiple processors. A can only imagine what a SMP PII box would run like. Crikey! -Steve Laurence Berland wrote: > SInce people have been talking about it, and it started getting > supported in 3.0, and I've got a bit of spare time, I was wondering if > someone could either point me to a good place or just tell me, what is > symmetric multiProcessor? What else is there for a multiprocessor > system? What are the differences? > > Thanks for answering my question, or at least pointing me to where they > are answered > > -- > Laurence Berland, Stuyvesant HS Debate > <><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><><> > > Windows 98: n. > useless extension to a minor patch release for > 32-bit extensions and a graphical shell for a > 16-bit patch to an 8-bit operating system > originally coded for a 4-bit microprocessor, > written by a 2-bit company that can't stand for > 1 bit of competition. > http://stuy.debate.net > icq #7434346 aol imer E1101 > > > > > To Unsubscribe: send mail to majordomo@FreeBSD.org > with "unsubscribe freebsd-questions" in the body of the message To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message