Supercomputer Applications
Using MPE - Graphics Package for MPI

The MPE Graphics Library works with a version of MPI called "MPICH"
This means that you must use this MPICH system rather than LAM.

1. Download the sample MPE graphics file - save as cxgraphics.c - cxgraphics.c
   Also see the longer version: cxgraphicsOrig.c
   
   
2. To compile this file: mpecc cxgraphics (you don't need the ".c")
   This should make an executable file called "cxgraphics"
   
   
3. To Run this program: mperun -np 3 cxgraphics
   ( "-np 3" means run with 3 processes)
   
   
4. Now try a "MonteCarlo" approximation of PI
   • Download monteCarloMPI.c (save as monteCarloMPI.c)
   • Compile: mpecc monteCarloMPI.c
   • Run: mperun -np 3 monteCarloMPI .01 (the last number is epsilon - LOOK AT THE CODE!)
   
   
5. MPE Resources:
   • Summary of Routines in the MPE Graphics Library
   • MPE Graphics--Scalable X11 Graphics in MPI by Gropp, Lusk, and Karrels
   • Beginners Guide to MPI (scroll down to MPE Graphics)