openradioss can not use multi cores in one process about openradioss

[roguic]

Hi @yaolang-hpc ,

There is a mistake in your export command : you used export OMP_NUM_THRTEADS=4 instead of export OMP_NUM_THREADS=4

I do not recommend to use -nt xxx (with xxx the number of openmp thread). Why ? because you need to map and bind your threads properly. For this, please prefer the OMP_NUM_THREADS variable.
Mapping and binding with openmpi can be easily done with the --map-by option and --bind-to option (see the openmpi doc here https://www.open-mpi.org/doc/v3.1/man1/mpirun.1.php).

You can use the following command lines :
export OMP_STACKSIZE=400M
export OMP_NUM_THREADS=4
./starter -np 16 -i *0.rad
mpirun -np 16 --map-by socket:PE=$OMP_NUM_THREADS --bind-to core ./engine_linux64_ompi -i *1.rad

We will update the documentation "How to run" with these advises

Best,
Romain

[yaolang-hpc]

Hi roguic
when i use OMP_STACKSIZE=400M env variable，it works.Thank you for your reply.

[OlivierWienholtz]

Hello,
Based on your experience, we have modified the INSTALL.md documentation, how run OpenRadioss for Linux document.
See : 4110274