From owner-freebsd-questions Tue Jun 8 11:56:19 1999 Delivered-To: freebsd-questions@freebsd.org Received: from smtp.email.msn.com (cpimssmtpu03.email.msn.com [207.46.181.19]) by hub.freebsd.org (Postfix) with ESMTP id 70D5414CC4 for ; Tue, 8 Jun 1999 11:56:06 -0700 (PDT) (envelope-from BruceP@msn.com) Received: from bpennypacker_02 - 153.34.158.89 by email.msn.com with Microsoft SMTPSVC; Tue, 8 Jun 1999 11:56:07 -0700 Message-ID: <001e01beb1e1$0b730d80$2612040a@bpennypacker_02.directhit.com> From: "Bruce Pennypacker" To: Subject: dual processor question Date: Tue, 8 Jun 1999 14:59:28 -0400 X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 4.72.3110.5 X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3110.3 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Hi all, We have an application that is very memory & cpu intensive, and can take upwards of 18 hours to run. The application essentially loads 4.5 million records of data into an array in memory and then does a lot of pattern matching through the data. It's currently running on a Pentium II 400MHz machine with 256MB RAM that's running FreeBSD 2.2.8-RELEASE . We're considering upgrading the machine for a number of reasons and one of the things we're trying to determine if going with a dual processor machine would help out much in terms of cutting down the time it takes this application to run. Not knowing much about the details of multi-processor machines I have no idea what kind of benefit simply adding another processor would provide. Would simply upgrading to a dual processor system & FreeBSD 3.x help improve the performance of this application, or would it take a fairly hefty rewrite of the application to make the second CPU useful? I have visions of rewriting this thing to fork subprocesses & share memory, etc. Would all that be necessary? Thanks, -Bruce To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message