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Reply To: Multi-GPU usage issue

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› Forums › OpenLB › General Topics › Multi-GPU usage issue › Reply To: Multi-GPU usage issue

November 8, 2022 at 10:44 am #6958
Adrian
Keymaster

Just to confirm: You used the config/gpu_openmpi.mk example config?

How exactly did you launch the application and how did you assign each process a single GPU? (Following the comments from the example config)

Usage on a multi GPU system: (recommended when using MPI, use non-MPI version on single GPU systems)
– Run `mpirun -np 4 bash -c ‘export CUDA_VISIBLE_DEVICES=${OMPI_COMM_WORLD_LOCAL_RANK}; ./cavity3d’
(for a 4 GPU system, further process mapping advisable, consult cluster documentation)

  • This reply was modified 3 years, 2 months ago by Adrian.