Hi Panayotis,

Can you try specifying --procs, --num-threads, and --ppn-used at the same time? It looks like your machine defaulted to --ppn-used=112, which is not what you want, so you may need to overwrite it.

You can check your allocation details in /output-000x/SIMFACTORY/properties.ini. A useful strategy is to verify whether the allocation matches these relations:


ppn-used   = numthreads * nodeprocs
procs      = numthreads * numprocs = nodes * ppn-used

Below is my understanding (I personally use numsmt=1, so threads = cores in my case). Please correct me if I’m wrong on them:

nodes = number of nodes
procsrequested = total number of cores requested (may not all be used, but you still occupy them on the HPC)
ppn = number of cores per node requested (may not all be used)
numprocs = total number of MPI ranks actually used
nodeprocs = number of MPI ranks per node actually used
procs = total number of cores actually used
numthreads = number of OpenMP threads per MPI rank actually used
ppnused = number of cores per node actually used
numsmt = number of threads per physical core

Best,
Wei