From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from sh.od.inet (CPE0080c82c70ca.cpe.net.cable.rogers.com [24.112.140.233]) by dsl2.external.hp.com (Postfix) with ESMTP id B69BE48DE for ; Sat, 9 Mar 2002 09:40:36 -0700 (MST) Date: Sat, 9 Mar 2002 11:41:13 -0500 From: "Carlos O'Donell Jr." To: Duraid Madina Cc: parisc-linux@lists.parisc-linux.org Subject: Re: [parisc-linux] 'foreign' PCI cards in an rp2430 Message-ID: <20020309114113.B7582@systemhalted> References: <20020309082810.CD8FF4835@dsl2.external.hp.com> <000001c1c750$8d5f7900$022a17ac@simplex> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii In-Reply-To: <000001c1c750$8d5f7900$022a17ac@simplex>; from duraid@fl.net.au on Sat, Mar 09, 2002 at 08:54:55PM +1100 Sender: parisc-linux-admin@lists.parisc-linux.org Errors-To: parisc-linux-admin@lists.parisc-linux.org List-Help: List-Post: List-Subscribe: , List-Id: parisc-linux developers list List-Unsubscribe: , List-Archive: > > > Have you tried begging, trading, or buying some cycles on a > > Superdome with some 100GBs of RAM instead of waiting for > > weeks to see your jobs run to completion? > > Really, my code should be pretty efficient (it takes weeks to run anyway > ;) with the setup I've described above, but the killer is: I'm a > University student ("I knew it!" I hear you all say ;) and as such, my > code is perpetually in the "hmm, I wonder what'd happen if.." state. So > "some cycles" would become "some more cycles" faster than you could say > "where's all my RAM gone?!" > > Duraid > This is a very similar problem that we had when calculating prime alternating knots[1]. Essentially what was done was to use MPI[2] and a fast network connection, such that you could have _other_ computers holding data in RAM/SWAP. Parallelize parallelize parallelize. It's really easy to learn MPI and it's great for those big problems that you may not be able to do with a 64-bit box :) a. Get a 100MBit/1GBit switch and NIC's. b. Get some more boxes (borrow/lie/cheat/steal) c. Tie them together. This is what I do for a hobby :) ... and yes I'm a student aswell. It's nice to see that people like Bell and Nortel are willing to donate expensive gear for projects like yours or mine[3] :) c. [1] http://baldric.uwo.ca/article.php3?section=baldric&article=knots [2] http://www-unix.mcs.anl.gov/mpi/mpich/ [2] http://www.lam-mpi.org/ [3] http://www.baldric.uwo.ca/~carlos/pdisplay.html