Intel compilers

Intel Compilers

Intel Compiler Parallel Suites [1] offer C, C++, and FORTRAN Compilers which have optimization and multi-threading features. We have a license for the HPC, and provide recent annual releases from Intel.

Compiler Version

Check the Suite versions using the lmod 'modules' command:

module spider intel

output:

Description:

Intel Compilers Suite - loads C/C++/Fortran Compilers+Debug environment

Versions:

intel/17

intel/18

intel/20

intel/20-1

Load the appropriate module. Version (20)17 supports most installed modules, while version 20-1 is the latest for developing and compiling with Intel Parallel Suite:

module load intel/20-1

To check the version of Intel Compilers, type:

icc --version

output:

icc (ICC) 19.1.1.217 20200306

Compiling a Code & Executing

Compiling a C or C++ Program

Interactive

Request the compute node:

srun -t 1:00:00 -c 4 --mem=16gb --pty bash

Copy the content below in a hello.c file

hello.c:

#include <stdio.h>

int main()

{

printf("Hello World\n");

return 0;

}

Compile the code to create "hello" as an executable

icc -o hello hello.c

Run the Executable

./hello

Your output will be: Hello World

Batch

Copy the content in your file (let's say job.slurm).

#!/bin/bash

#SBATCH -o hello.o%j

#SBATCH --time=00:02:00

#SBATCH -N 1

#SBATCH -n 1

#Compiling section

# module load intel #-- intel/17 is loaded by default, uncomment for specific version

icc -o hello hello.c

#Copying files to scratch

cp -r hello $PFSDIR

#Running job

cd $PFSDIR

./hello

cp -ru * $SLURM_SUBMIT_DIR

Submit the job:

sbatch job.slurm

You will find the output at hello.o<jobid>

To compile the C++ source file "test.cpp" with the Intel C++ compiler, use the command

icc -o test test.cpp

Note that the Intel C compiler is used for source files ending in ".c" and the Intel C++ compiler is used for source files ending in ".cpp" or ".C".

Compiling a FORTRAN Program

To compile the FORTRAN 77 source file "test.f" with the Intel FORTRAN 77 compiler, use the command

ifort -o test test.f

To compile the FORTRAN 90 source file "test.f90" with the Intel FORTRAN 90 compiler, use the command

ifort -o test test.f90

Note that the Intel FORTRAN 77 compiler is used for source files ending in ".f" and the Intel FORTRAN 90 compiler is used for source files ending in ".f90".

Monitoring Licenses

Refer to HPC Guide to Licenses.