A Hello World OpenMPI program with Intel

I compiled a simple parallel hello world program to test whether OpenMPI is working well with Intel Compilers using the example taken from Compiler Examples from https://wiki.mst.edu/nic/how_to/compile/openmpi-intel-compile

Step 1: Ensure your OpenMPI is compiled with Intel. Read the Building OpenMPI with Intel Compiler (Ver 2) for more information


Step 2: Cut and paste the parallel program taken from https://wiki.mst.edu/nic/how_to/compile/openmpi-intel-compile. Compile the C++ program with mpi

$ mpicxx -o openmpi-intel-hello mpi_hello.cpp

Step 3: Test on SMP Machine

$ mpirun -np 8 open-intel-hello

Step 4: Test on  Distributed Cluster

$ mpirun -np 8 -hostfile hostfile.file open-intel-hello

You should see some output something like

Returned: 0 Hello World! I am 1 of 8
Returned: 0 Hello World! I am 6 of 8
Returned: 0 Hello World! I am 3 of 8
Returned: 0 Hello World! I am 0 of 8
Returned: 0 Hello World! I am 2 of 8
Returned: 0 Hello World! I am 5 of 8
Returned: 0 Hello World! I am 4 of 8
Returned: 0 Hello World! I am 7 of 8