Newsgroups: comp.parallel.mpi From: fachat@physik.tu-chemnitz.de (Andre Fachat) Subject: Re: MPI_Init(&argc, &argv); Organization: My org Date: 1 Dec 1997 09:59:24 GMT Message-ID: <65u1ps$3i$1@narses.hrz.tu-chemnitz.de> Vereecken Luc (Luc.Vereecken@chem.kuleuven.ac.be) wrote: : Michael Blocksome wrote: : >Hello, : >I am new to MPI and I'm curious about the argc and argv arguments to : >MPI_Init(). What is MPI_Init() looking for? I'd like to pass in other : >"non-MPI" arguments on the command line and only pass the arguments : >MPI_Init() requires. However, I do not know what to send. Any help? : The arguments you have to pass to MPI_INIT is implementation : dependent. e.g. MPICH requires other arguments than say POE or LAM. : The reason the argc and argv are passed to MPI_INIT is to allow the : MPI-implementation to retrieve it's specific information, so the host One more thing: If you pass the parameter to MPI_Init(), it removes all the parameters MPI has added say, for rsh execution (MPICH, p4 device). After MPI_Init() you then only see the non-MPI parameters. If you parse the command line options _before_ MPI_Init you must be able to parse the MPI options too, which you cannot because they are different for different implementations. Andre -- Email address may be invalid. Use "fachat AT physik DOT tu-chemnitz DOT de" ------Fight SPAM - join CAUCE http://www.cauce.org------Thanks, spammers... Andre Fachat, Institute of physics, Technische Universität Chemnitz, FRG http://www.tu-chemnitz.de/~fachat