PVMPI : PVM integrating MPI applications


A software system that allows independent MPI applications to inter-communicate even if they are running under different MPI implementations using different language bindings.

Rational behind the project

Under MPI-1 applications cannot communicate with other processes outside their MPI_COMM_WORLD once it has formed (without using some other entity). This means that there is only a static process model. This has advantages such as: The main disadvantages of such a static model is: Even though the process model was simple in MPI-1, due to the diverse number of methods available to start jobs on MPPs no standard method was declared for starting jobs (even the support application MPIRUN varies).
Many message passing users had come from Network/Cluster computing environments and hence may feel restricted by MPI and many of the run time environments on MPPs.

This hopes to give users of MPI-1 the capabilities and functionality that they have come accustomed to from system like PVM or LAM. This includes some features that are not even being considered in the MPI-2 forum.

Goals of the project

The main goal of the PVMPI project is to allow different MPP vendor MPI implementations to inter-communicate to aid the use of multiple MPPs in solving grand challenge projects. Selective requirements and goals:

Targeted users of the project

Any users that require multi-part dynamic MPI-1 applications that cannot wait for MPI-2 to appear.

Current work

Power Point presentation for SuperComputing 96 on PVMPI

Heterogeneous MPI Application Interoperation and Process Management under PVMPI , G. Fagg, J. Dongarra, and A. Geist, University of Tennessee Computer Science Technical Report, CS-97-???, June 1997. Submitted to the Euro PVM-MPI Conference, Cracow, Poland, November 97 . A postscript version is available.

Related Projects, Papers et al..



Will be released in a public beta* form in third quarter 1997.
Should support C and F77 bindings under MPIF, LAM and MPICH.
Will require PVM3.3.8 or above.
PVM patches are needed if the uniform spawn functions are used. (These are provided for PVM 3.3.11)
Please watch for announcements on comp.parallel.pvm and comp.parallel.mpi.
* Note: once enough user comments have been collected about requirements and of the system, it will become fixed and officially released. This is being done as some of the concepts used are and should be open to discussion.

Project team (ICL/UTK/ORNL)

Project design, implementation, support and documentation by Graham

Testing (beta) team (is or will be!): Kevin London

Management and Support: Jack Dongarra, Shirley Browne and Al.

Last updated August 1 1997 by Browne.