job.in

#!/bin/bash -l
#SBATCH --constraint=cpu
#SBATCH --cpus-per-task=1
#SBATCH --qos=interactive
#SBATCH --nodes=1
#SBATCH --time=00:04:00
#SBATCH --job-name=job-@BENCHMARK@
#SBATCH --output=job-@BENCHMARK@.o%j
#SBATCH --error=job-@BENCHMARK@.e%j

# set some openmp variables: 
# OMP_PLACES=threads maps OpenMP threads to hardware threads
# OMP_PROC_BIND=spread binds threads as evenly as possible
#
# see https://docs.nersc.gov/jobs/affinity/ for more information

export OMP_PLACES=threads
export OMP_PROC_BIND=spread

# iterate over some number of threads. 

# Note: only OpenMP codes have interaction with the OMP_NUM_THREADS env variable, 
# non-OpenMP jobs are not affected 

# make use of the OMP_SCHEDULE environment variable to set the thread scheduling 
# algorithm. 
# the default scheduling algorithm is static
# export OMP_SCHEDULE=static
# export OMP_SCHEDULE=dynamic

for t in 1 4 16 64
   do
   export OMP_NUM_THREADS=$t
   echo "OMP_NUM_THREASDS = " $OMP_NUM_THREADS
   ./benchmark-@BENCHMARK@
#   srun -n 1  ./benchmark-@BENCHMARK@  # fall 2023, don't use srun to launch non-MPI jobs
# don't use --cpu-bind=threads on KNL when P % 272 != 0
# see https://docs.nersc.gov/jobs/affinity/#slurm-cpu-bind-flag
#   srun -n 1 --cpu-bind=threads ./benchmark-@BENCHMARK@
done