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Martijn_D_
Beginner
43 Views

Intel mpirun interpreting process count incorrectly in Slurm

mpirun launches only a maximum 8 processes per node, on a node that has 12 cores.
I suspect this is a result of misinterpretation of the processor count from the slurm environment
or some kind of limitation enforced by mpirun.
Intel MPI version:4.0.3.008
Slurm version : 2.2.4
Nodes have Intel Xeon CPU X5650 @ 2.67Ghz (12 cores)
1. Request resources via slurm.
salloc -n 24
The resources are allocated properly.
echo $SLURM_NNODES
2
echo $SLURM_JOB_NUM_NODES
2
echo $SLURM_NPROCS
24
echo $SLURM_TASKS_PER_NODE
12(x2)
echo #SLURM_JOB_NODELIST
node[049-050]
2. Run mpi job
mpirun ./intelmpijob
This lauches 8 processes pernode (total of 16).
Any quick response will be greatly appreciated.
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1 Reply
Dmitry_S_Intel
Employee
43 Views

Dear martijn@clustervision.com,

Thank you forthe post.

Please try to run your job with

mpiexec.hydra -bootstrap=slurm ./intelmpijob

Best regards,
Dmitry