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Intel MPI

Loading Intel MPI

[user@n0000 ~]$ module load intel-oneapi-compilers
[user@n0000 ~]$ module load intel-oneapi-mpi
[user@n0000 ~]$ module list

Currently Loaded Modules:
  1) intel-oneapi-compilers/2023.1.0   2) intel-oneapi-mpi/2021.10.0

Compiling MPI applications with Intel MPI

Open MPI compiler wrappers mpiicx, mpiicpx, mpiifx can be used to compile MPI applications. For hello world C/C++/Fortran examples:

Examples

mpiicx -o helloc hello_world.c

mpiicx is the MPI wrapper to the Intel(R) C/C++ compiler and should be used to compile and link C programs

mpiicpx -o hellocxx hello_world.cpp

mpiicpx is the MPI wrapper to the Intel(R) oneAPI DPC++/C++ Compiler and should be used to compile and link C++ programs

mpiifx -o hellofortran hello_world.f90

mpiifx is the MPI wrapper to the Intel(R) oneAPI Fortran Compiler ifx.

The intel-oneapi-mpi package also comes with MPI wrapper to the Intel Classic Compilers: mpiicc, mpiicpc and mpiifort.

Running MPI applications using Intel MPI

Intel MPI applications can be launched using:

  • mpirun e.g.: mpirun -np 2 ./helloc
  • srun: To launch an Intel MPI application using srun, please set the I_MPI_PMI_LIBRARY environment variable and pass mpi=pmi2 argument as follows in your slurm script. 
    export I_MPI_PMI_LIBRARY=/usr/lib64/libpmi2.so
srun --mpi=pmi2 mpi_application