Fortran tensor benchmarking

A simple script to benchmark, and hopefully illustrate good practices of tensor operations in Modern Fortran

Compilation notes

gfortran (tested on 9.3.0)

You need an installation of OpenBLAS that is compiled with USE_OPENMP=1, see here for notes

gfortran dgemm_test.f90 -o dgemm_test -lopenblas -fopenmp -O3

ifort (tested on 2021.5.0)

ifort dgemm_test.f90 -o dgemm_test  -L${MKLROOT}/lib/intel64 -lmkl_intel_ilp64 -lmkl_intel_thread -lmkl_core -liomp5 -lpthread -lm -ldl  -i8  -I"${MKLROOT}/include" -fopenmp -O3 -heap-arrays