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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 <env-files-gnu10> 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 <run-script>, which will be discussed in a subsequent chapter.