From owner-freebsd-smp Thu Jul 24 03:15:18 1997 Return-Path: Received: (from root@localhost) by hub.freebsd.org (8.8.5/8.8.5) id DAA20893 for smp-outgoing; Thu, 24 Jul 1997 03:15:18 -0700 (PDT) Received: from cenotaph.snafu.de (gw-deadnet.snafu.de [194.121.229.33]) by hub.freebsd.org (8.8.5/8.8.5) with SMTP id DAA20888 for ; Thu, 24 Jul 1997 03:15:04 -0700 (PDT) Received: by cenotaph.snafu.de from deadline.snafu.de using smtp id m0wrKv4-000KBUC; Thu, 24 Jul 1997 12:14:50 +0200 (CEST) (Smail-3.2 1996-Jul-4 #1) Received: by deadline.snafu.de id m0wrKv4-00049oC; Thu, 24 Jul 1997 12:14:50 +0200 (CEST) (Smail-3.2 1996-Jul-4 #1) Message-Id: Date: Thu, 24 Jul 1997 12:14:50 +0200 (CEST) Mime-Version: 1.0 X-Newsreader: knews 0.9.8 References: In-Reply-To: From: mickey@deadline.snafu.de (Andreas S. Wetzel) Subject: Re: user questions X-Original-Newsgroups: lists.freebsd-smp To: Troy Curtiss Cc: smp@freebsd.org Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-smp@freebsd.org X-Loop: FreeBSD.org Precedence: bulk Hi! --- In article , Steve Passe writes: > Hi Steve, > I see you've been working hot & heavy on the SMP FreeBSD stuff. > I may be in a position to buy an MP motherboard here at work, which > would you recommend? Secondly, how far along is the SMP in the way > of process sharing/threading/etc... If I write a program that parallel > tasks (ie... brute forcing password keyspaces), can I put a CPU on each > task/thread/process to effectively double my speed (almost)? I've been running FreeBSD SMP on a dual P5 box (ASUS P65Up5) since about March 97 without having any serious problems with it. I used it to render some animation sequences with Povray 3.0. I splitted the work onto two processes (one rendering all even image numbers and one rendering the odd image numbers). All I can say is that it runs like a breeze. Both povrays run parallel at nearly full single processor speed. Same thing is true for compiling things that support parallel make i.e. SMP kernel. My current kernel configuration takes about 4:59m with -j 8 enabled on a dual P133 and hits at about 180-190 % of single processor speed. Regards, Mickey -- (__) (@@) Andreas S. Wetzel Mail: mickey@deadline.snafu.de /-------\/ Utrechter Strasse 41 Web: http://cenotaph.snafu.de/ / | || 13347 Berlin Fon: <+4930> 456 066 90 * ||----|| Germany Fax: <+4930> 456 066 91/92 ~~ ~~