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Reply To: Multi GPUs Calculation

#7685
Yuji
Participant

Dear Adrian,

Thank you for very kind replying. I am getting to understand it gradually.

I would like to calculate LBM under the 2.5*10^11 grid points(I know it is very huge memory comsumption )
I reckon “gpu_hybrid_mixed.mk” is useful for my case becasuse when compiled by gpu_hybrid_mixed.mk, CPU and GPU are used for LBM calculation.
Now I have two GPUs and my CPU has 8 cores.
In my understanding, “mpirun -np 2 ./cavity3d” commands use 2 cores of CPU and 1 GPU(No.1 GPU is not used) on the other hand, “mpirun -np 2 bash -c ‘export CUDA_VISIBLE_DEVICES=${OMPI_COMM_WORLD_LOCAL_RANK}; ./cavity3d” commands use 2 GPUs(No.0 and No.1 GPUs are used) but CPU is not used for LBM calculation.
I would like to use 2GPUs and 8cores of CPU. Do you have any recommendation commnads? And is my understanding correct?
Thank you.
Yuji

  • This reply was modified 7 months ago by Yuji.