Difference between revisions of "MPI"
From HCL
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You can choose different MPIs: | You can choose different MPIs: | ||
| + | * Open MPI: [http://www.open-mpi.org] | ||
| − | + | == Debugging == | |
| − | + | * Add the following code: | |
| + | <source lang="C"> | ||
| + | int rank; | ||
| + | MPI_Comm_rank(MPI_COMM_WORLD, &rank); | ||
| + | if (!rank) | ||
| + | getc(stdin); | ||
| + | MPI_Barrier(MPI_COMM_WORLD); | ||
| + | </source> | ||
| + | * Compile your code with <code>-g</code> 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. | ||
Revision as of 15:50, 1 February 2010
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
-goption - 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.
