MPI: A Message-Passing Interface Standard, Version 3.1

This document describes the Message-Passing Interface (MPI) standard, version 3.1. The MPI standard includes point-to-point message-passing, collective communications, Group and communicator concepts, process topologies, environmental management, process creation and management, one-sided communications, extended collective operations, external interfaces, I/O, some miscellaneous topics, and a profiling interface. Language bindings for C and Fortran are defined.