From owner-freebsd-smp Fri Nov 5 8:48: 3 1999 Delivered-To: freebsd-smp@freebsd.org Received: from horst.bfd.com (horst.bfd.com [12.9.219.10]) by hub.freebsd.org (Postfix) with ESMTP id 84EC114C84 for ; Fri, 5 Nov 1999 08:47:59 -0800 (PST) (envelope-from ejs@bfd.com) Received: from HARLIE.bfd.com (bastion.bfd.com [12.9.219.14]) by horst.bfd.com (8.9.3/8.9.3) with ESMTP id IAA25522; Fri, 5 Nov 1999 08:45:04 -0800 (PST) (envelope-from ejs@bfd.com) Date: Fri, 5 Nov 1999 08:45:04 -0800 (PST) From: "Eric J. Schwertfeger" To: Adam Strohl Cc: "Daniel O'Connor" , Darryl Okahata , freebsd-smp@FreeBSD.ORG Subject: Re: Dual Celeron + FreeBSD? In-Reply-To: Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-smp@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org On Thu, 4 Nov 1999, Adam Strohl wrote: > In the real world the 1/2 the cache at 2x the speed makes all of JACK > in performance difference from the "real" PIIs. It rocks. I agree for the most part, on single-processor machines, though it's actually a quarter the cache. The reduced, faster cache causes a single celeron to be more memory-bandwidth sensitive. An SMP machine, however, has two CPUs contending for the same bandwidth, and for some processes, that can be fatal. I've done make buildworld's on both my dual Celeron and my dual PPro (the ones with 512K cache). The difference between single and dual celeron is minimal, about 10%. On the dual PPro machine, the speed improvement, using the same disk subsystem, was 80%. Yes, on processes that aren't memory intensive, dual Celerons rock. In fact, on most things, I see closer to 40-50% improvement with dual Celerons, the make buildworld is rather memory intensive. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-smp" in the body of the message