Skip to content

Reply To: Multi GPUs Calculation

Due to recent bot attacks we have changed the sign-up process. If you want to participate in our forum, first register on this website and then send a message via our contact form.

› Forums › OpenLB › General Topics › Multi GPUs Calculation › Reply To: Multi GPUs Calculation

July 11, 2023 at 7:06 pm #7620
Adrian
Keymaster

Did you verify whether single-GPU execution works correctly on the other GPU by setting CUDA_VISIBLE_DEVICES to 1?

I will only be back from holiday tomorrow so can not verify right now but ” -mca btl_smcuda_use_cuda_ipc 0″ should disable NVlink for local GPU-GPU communication in CUDA-aware MPI.