Alain, I thought the system was arranged as it was because some MPI implementations pass special arguments from the runtime system to the MPI library via special command-line arguments. Passing the args to MPI_Init allows the library to intercept those arguments (and erase them from the arg list seen by the rest of the program). I don't know if any real implementations work this way, but we may want to be careful about discouraging passing the real arg variables to MPI_Init.
-Hal ----- Original Message ----- > From: "Matthias Troyer" <[email protected]> > To: "alain miniussi" <[email protected]>, "Discussion of Boost.MPI > development" <[email protected]> > Sent: Thursday, November 29, 2012 5:17:35 AM > Subject: Re: [Boost-mpi] No arg init > > Hi Alain, > > You can indeed provide no arg initialization and just fake arguments > for MPI-1. > > Matthais > > On Nov 29, 2012, at 12:13 PM, Alain O Miniussi > <[email protected]> wrote: > > > > > Hi, > > > > While working on the thread issue, a question arises regarding the > > no > > arg initialization. > > > > I understand that some MPI1.x might not allow it, but should > > BOOST.MPI > > refect that choice ? Why can't we just pass dummy empty (argc,argv) > > to > > MPI_Init(_thread) since, after all, no specific values are required > > ? > > > > This would simplify our API, and I do not see any down side. > > > > Any though ? > > > > Thanks > > > > -- > > Alain Miniussi > > Responsable Tech. Centre de Calcul Haute Performance > > Obs. de la Côte d'Azur |Mont Gros: +33 4 92 00 30 09 > > BP 4229 |Sophia : +33 4 83 61 85 44 > > 06304 Nice Cedex 4 |https://crimson.oca.eu > > > > _______________________________________________ > > Boost-mpi mailing list > > [email protected] > > http://lists.boost.org/mailman/listinfo.cgi/boost-mpi > > _______________________________________________ > Boost-mpi mailing list > [email protected] > http://lists.boost.org/mailman/listinfo.cgi/boost-mpi > -- Hal Finkel Postdoctoral Appointee Leadership Computing Facility Argonne National Laboratory _______________________________________________ Boost-mpi mailing list [email protected] http://lists.boost.org/mailman/listinfo.cgi/boost-mpi
