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Submitting Multicore/Multithreading job using multiple processors/threads on a single physical computer (SMP parallel job)

Your program might require a number of threads. For instance, in the following example there is a demand for 8 threads (declared by number in round brackets):

#Setup FWK for multithreaded 
or something like nthreads demand in python script:
parser.add_argument('--nthreads', action='store', help='Number of CPU threads to use', type=int, default=8, required=False)
You correspondingly must declare the number of cores that your job will require by using --cpus-per-task= option in your job submission script:

#SBATCH --job-name=smp_illustration         # Job name
#SBATCH -p wn
#SBATCH --account=t3
#SBATCH -w t3wn58                           # choose particular Compute Node from wn partition
#SBATCH --ntasks=1                          # Run a single task
#SBATCH --cpus-per-task=8                   # Number of CPU cores per task; Example of  submitting  8-core parallel SMP job
#SBATCH --mem=3gb                           # Job memory request
##SBATCH --mem-per-cpu=3072                 # example of memory request for one CPU core
#SBATCH --time=00:05:00                     # Time limit hrs:min:sec
#SBATCH --output=smp_%j.log                 # Standard output and error log


-- NinaLoktionova - 2019-09-24

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Topic revision: r5 - 2020-03-13 - NinaLoktionova
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