Testing the Installation

To ensure that the Intel® MPI Library is installed and functioning correctly, complete the general testing below, in addition to compiling and running a test program.

To test the installation (on each node of your cluster):

1. Verify that <installdir>/<arch>/bin is in your PATH:

   $ ssh <nodename> which mpirun
   You should see the correct path for each node you test.

   (SDK only) If you use the Intel® Composer XE packages, verify that the appropriate directories are included in the PATH and LD_LIBRARY_PATH environment variables
   $ mpirun -n <# of processes> env | grep PATH
   You should see the correct directories for these path variables for each node you test. If not, call the appropriate compilervars.[c]sh script. For example, for the Intel® Composer XE 2015 use the following source command:
   $ ./opt/intel/composer_xe_2015/bin/compilervars.shintel64

2. In some unusual circumstances, you need to include the <installdir>/<arch>/lib directory in your LD_LIBRARY_PATH. To verify your LD_LIBRARY_PATH settings, use the command:
   $ mpirun -n <# of processes> env | grep LD_LIBRARY_PATH