Introduction

Mpich is a freely available implementation of the MPI standard that runs on a wide variety of systems. The details of the mpich implementation are described in [7]; related papers include [5] and [6].

Major Features of mpich:

Full MPI 1.2 compliance, including cancel of sends.

MPMD programs.

Multiple Fortran bindings.

Parts of MPI-2 are also supported:

Most of MPI-IO is supported through the ROMIO implementation (See romio/README for details).

Support for MPI_INIT_THREAD (but only for MPI_THREAD_SINGLE and MPI_THREAD_FUNNELLED).

Miscellaneous new MPI_Info and MPI_Datatype routines.

Mpich also includes components of a parallel programming environment, including

Tracing and logfile tools based on the MPI profiling interface, including a scalable logfile format (SLOG).

Parallel performance visualization tools (jumpshot).

Extensive correctness and performance tests.

Both large and small application examples.