On Apr 14 2011, Ralph Castain wrote: >> >>> ... It's hopeless, and whatever you do will be wrong for many >>> people. ... >> >> I think that sums it up pretty well. :-) >> >> It does seem a little strange that the scenario you describe somewhat >> implies that one process is calling MPI_Finalize loooong before the >> others do. Specifically, the user is concerned with tying up resources >> after one process has called Finalize -- which implies that the others >> may continue on for a while. It's not invalid, of course, but it is a >> little unusual. > > I'm finding it more common than we thought. Note that I didn't say that > one process called MPI_Finalize before the others. In this case, they > call it fairly close together, but the individual processes continue > running for quite some time, or until they determine that something is > wrong and exit with non-zero status. Nobody is denying that it is common. Now, what happens when you encounter a language or compiler that uses return codes for mere warnings (e.g. ignored IEEE 754 flags, as stated to be desirable by LIA-1)? Bang! Remember that C is not the universe and many languages use MPI via the C interface, but do not let C control their model. Regards, Nick Maclaren. _______________________________________________ devel mailing list email@example.com http://www.open-mpi.org/mailman/listinfo.cgi/devel
Kenneth A. Lloyd
CEO - Director of Systems Science
Watt Systems Technologies Inc.
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