Sample environment file for Intel 19 compilers

To load software libraries based on the Intel 19 compilers, we can start from our GNU 10.2.0 environment file and add the proper module load commands for Intel 19.

Add the code below (with the appropriate modifications for your system) into a file named ~/gcclassic.intel19.env.

# Echo message if we are in a interactive (terminal) session
if [[ $- = *i* ]] ; then
  echo "Loading modules for GEOS-Chem, please wait ..."
fi

#==============================================================================
# Modules (specific to Cannon @ Harvard)
#==============================================================================

# Remove previously-loaded modules
module purge

# Load modules for Intel compilers v19.0.4
module load git/2.17.0-fasrc01
module load intel/19.0.5-fasrc01
module load openmpi/4.0.1-fasrc01
module load netcdf-fortran/4.5.2-fasrc03
module load flex/2.6.4-fasrc01
module load cmake/3.17.3-fasrc01

#==============================================================================
# Environment variables
#==============================================================================

# Parallelization settings for GEOS-Chem Classic
export OMP_NUM_THREADS=8
export OMP_STACKSIZE=500m

# Make all files world-readable by default
umask 022

# Specify compilers
export CC=icc
export CXX=icpc
export FC=ifort

# Netcdf variables for CMake
# NETCDF_HOME and NETCDF_FORTRAN_HOME are automatically
# defined by the "module load" commands on Cannon.
export NETCDF_C_ROOT=${NETCDF_HOME}
export NETCDF_FORTRAN_ROOT=${NETCDF_FORTRAN_HOME}

# Set memory limits to max allowable
ulimit -c unlimited              # coredumpsize
ulimit -l unlimited              # memorylocked
ulimit -u 50000                  # maxproc
ulimit -v unlimited              # vmemoryuse
ulimit -s unlimited              # stacksize

# List modules loaded
module list

Tip

Ask your sysadmin how to load software libraries. If you are using your institution’s computer cluster, then chances are there will be a software module system installed, with commands similar to those listed above.

Then you can activate these settings from the command line by typing:

$ . ~/gcclassic.intel19.env

You may also place the above command within your GEOS-Chem run script, which will be discussed in a subsequent chapter.