Hybrid programming

Question 1

levels of thread support

Answer 1

0 MPI_THREAD_SINGLE
1 FUNNELED
2 SERIALIZED
3 MULTIPLE

Question 2

setup hybrid code

Answer 2

int provided;
MPI_Init_thread(&argc, &argv, MPI_THREAD_FUNNELED, &provided);
if (provided < MPI_THREAD_FUNNELED) {
MPI_Abort(MPI_COMM_WORLD, EXIT_FAILURE);}
MPI_Finalize();

Question 3

openmp thread bindings report

Answer 3

OMP_PROC_BIND master, close, spread, true, false

OMP_PLACES describes places

OMP_THREAD_LIMIT

Question 4

MPI therad bindings report

Answer 4

–map-by socket:PE=4
–bind-to core