Intel Compilers and Libraries

Description

intel website  

Intel® Parallel Studio XE is a software development suite that helps boost application performance by taking advantage of the ever-increasing processor core count and vector register width available in Intel® Xeon® processors, Intel® Xeon Phi™ processors and coprocessors, and other compatible processors.

Note

The default intel version is intel/2020.0.166.

Required Modules

Serial

• intel

System Variables

• HPC_MKL_DIR - Intel MKL library installation directory
• HPC_MKL_LIB - Intel MKL library file directory
• HPC_MKL_INC - Intel MKL library include file directory

Compiling Serial Programs

Examples for compiling serial programs:

Source Langurage	Compiler	Command Example
C	icc	icc compiler_options example.c
C++	icpc	icpc compiler_options -o example.exe example.cxx
F77	ifort	ifort compiler_options -o example.exe example.f
F90	ifort	ifort compiler_options -o example.exe example.f90

For detailed information on compiler options, please refer to the compiler man pages or use "-help" command option, for example

icc -help
man icc

Compiling OpenMP Programs

For multi-threaded shared memory parallel applications using OpenMP threading paradigm, add "-openmp" to the compiler options. For example:

icc -openmp -O2 -o example.exe example.c
icpc -openmp -O2 -o example.exe example.cpp
fort -openmp -O2 -o example.exe example.f90

Please see Sample_SLURM_Scripts for example job scripts to run threaded or multi-processor jobs.

Compiling MPI Programs

For distributed parallel MPI programs, the MPI library supported on hipergator is OpenMPI. To use Intel compiler with OpenMPI, please load the modules:

 module load intel openmpi

Examples for compiling MPI programs:

Source Langurage	Compiler	Command Example
C	mpicc	epic -O2 -o MPI_example.exe MPI_example.c
C++	mpicxx	mpicxx -O2 -o MPI_example.exe MPI_example.cxx
F77	mpif77	mpif77 -O2 -o MPI_example.exe MPI_example.f
F90	mpif90	mpif90 -O2 -o MPI_example.exe MPI_example.f90

Please refer to the compiler man pages or use "-help" command option, for example

mpicc -help
man mpicc

Please see Sample_SLURM_Scripts for example job scripts to run MPI and hybrid MPI/Threaded jobs.

Compiling for the right hardware

Do not compile on login nodes as those nodes are old opteron 4386 machines. The Intel compilers default to -xhost so they will build in a -m=pentium4 code path as the default and only code path if an alternative is not specified e.g. -ax. Please make sure to compile on a dev node

To take the advantages of the Advanced Vector Extensions (AVX) available on the newer Intel nodes on hipergator, please use the following compiler option for better performance when AVX is available:

-msse3 -axcore-avx2,core-avx-i