Changes for gp3 platform

#SBATCH --ntasks-per-node=2     # MPI processes per node

#SBATCH --threads-per-core=1    # do not use hyperthreads (i.e. CPUs = physical cores below)

#SBATCH --cpus-per-task=2       # number of CPUs per process

#SBATCH --cpus-per-task=4       # number of CPUs per process

#SBATCH --gpus-per-task=0       # number of GPUs per process

#SBATCH --gpu-bind=single:1     # bind each process to its own GPU (single:<tasks_per_gpu>)