From: Lars Rzymianowicz Newsgroups: comp.parallel.mpi Subject: Re: MPICH on SMP Linux Date: Tue, 23 Mar 1999 09:19:45 +0100 Organization: Dept. of Computer Engineering, University of Mannheim, Germany Message-Id: <36F74EA1.8FF2B183@mufasa.informatik.uni-mannheim.de> References: <7d6827$je4@ds2.acs.ucalgary.ca> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Xref: ukc comp.parallel.mpi:4798 "C. J. Tan" wrote: > What options do you use to compile MPICH on an SMP Linux x86 machine? > I need to run this machine in a network environment with a few other > single-processor Linux x86 machines. I am using > > -device=ch_p4 -comm=shared > > Is that right? Yes, that's right. It worked fine on our Dual-PII Linux boxes. > `./configure --help` says that for SGI shared-memory > machines, those are the options to use to take advantage of the > shared-memory system in a network environment. For large single SMP systems, there is a SM-only device called "shmem". COmmunication takes place only over shared memory. But your intention is to use clustered Dual-CPU machines, i guess. There you'll need a multi-protocol layer, which uses SM for intra-node communication and inter-node comm. between different nodes. That's exactly the one you get with the above options. > Also, how can I test > to see if MPICH is really running on more than one processor? Does > `make testing` test it? Don't know. You could use 'ps' and other system monitoring programs. To see the improvement in communication bandwidth, you could run the mpptest and goptest programs from the /examples/perftest dir of MPICH. Lars -- Homepage: http://mufasa.informatik.uni-mannheim.de/lsra/persons/lars/