MPI

You can choose different MPIs:

• Open MPI: [1]

Debugging

• Add the following code:

int rank;
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
if (!rank)
  getc(stdin);
MPI_Barrier(MPI_COMM_WORLD);

• Compile your code with -g option
• Run parallel application
• Attach to process(es) from GDB
  • MPICH-1 runs a background process for each application process: 0, 0b, 1, 1b, ..., therefore, attach to the first ones.