This assignment is optional. It is a "bonus" assignment intended to replace your lowest grade from the other 3 assignments.
Your assignment is to write an I/O performance test program for the Blue Gene/L (CCNI) using the MPI I/O commands: MPI_File_write_at and MPI_File_write_at_all for different write sizes: 1K, 16K, 256K, 1M and 4M across processor configurations: 16, 32, 64 and 128.
See the MPI 2.1 documentation on the class webpage for lecture 24.
Please let Prof. Carothers know if you plan to take on this assignment. He will help guide you through the details.