Parallel Environment for AIX 5L V4.1
Hitchhiker's Guide

Babel fish

In earlier versions of PE, a messages passing library called MPL was supported. This is not supported in PE 4.1. MPL programs must be converted to MPI programs.

This chapter provides information that will help you translate your MPL parallel program into a program that conforms to the MPI standard. In particular, it tells you which MPI calls to substitute for the ones you use right now in MPL.

In The Hitchhiker's Guide to the Galaxy, the Babel Fish is a tiny fish that, when inserted into your ear, can make any language understandable to you. Well, it is not quite that easy to translate a parallel program, but this chapter helps you determine how to perform the equivalent or comparable function in MPI that you did with MPL.

Note that the syntax in this section is in C unless we tell you otherwise. For the corresponding Fortran MPI syntax, see IBM Parallel Environment for AIX: MPI Subroutine Reference. Even though you must change your MPL programs to use the MPI library, the corresponding Fortran MPL syntax is documented in IBM Parallel Environment for AIX: MPL Programming and Subroutine Reference.

Other documents that may be helpful are A Message-Passing Interface Standard, Version 1.1 and MPI: A Message-Passing Interface Standard, Version 2.0, both of which are available from the University of Tennesee.