Enable Intel MPI

Intel MPI is available on the AWS ParallelCluster AMIs for alinux, alinux2, centos7, ubuntu1604, and ubuntu1804 values for the base_os setting. Using Intel MPI indicates that you accept the Intel Simplified Software License. Open MPI is placed on the path by default. To enable Intel MPI instead of Open MPI, the Intel MPI module must be loaded first. Install the latest using module load intelmpi. The exact name of the module changes with every update. To see which modules are available, run module avail.

$ module avail

----------------------------------------- /usr/share/Modules/modulefiles ------------------------------------------
dot                        libfabric-aws/1.8.1amzn1.3 module-info                null                       use.own
module-git                 modules                    openmpi/4.0.2

------------------------------------------------ /etc/modulefiles -------------------------------------------------

--------------------------------- /opt/intel/impi/2019.7.217/intel64/modulefiles ----------------------------------
intelmpi

To load a module, run module load modulename. You can add this to the script used to run mpirun.

$ module load intelmpi

To see which modules are loaded, run module list.

$ module list
Currently Loaded Modulefiles:
  1) intelmpi

To verify that Intel MPI is enabled, run mpirun --version.

$ mpirun --version
Intel(R) MPI Library for Linux* OS, Version 2019 Update 7 Build 20200312 (id: 5dc2dd3e9)
Copyright 2003-2020, Intel Corporation.

After the Intel MPI module has been loaded, multiple paths are changed to use the Intel MPI tools. To run code that was compiled by the Intel MPI tools, load the Intel MPI module first.

Note

Prior to AWS ParallelCluster 2.5.0, Intel MPI is not available on the AWS ParallelCluster AMIs in China (Beijing) and China (Ningxia).