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Nek5000 / nekRS

our next generation fast and scalable CFD code
https://nek5000.mcs.anl.gov/
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Select GPU Parallel #529

Closed Guoyfbb closed 1 year ago

Guoyfbb commented 1 year ago

Expected behavior I have two GPUs in my computer, and when one of my GPUs is running the other program, I want to run Nekrs, but the program reports an error. I would like to ask how to choose the GPU model before running the program to avoid the above problem..

yslan commented 1 year ago

What error did you see?

What GPU vender you have? If it's nvidia, maybe try CUDA_VISIBLE_DEVICES=1 to skip the first GPU?

Guoyfbb commented 1 year ago

I apologize for not being very accurate in my expression. Where should I add such a sentence to choose a GPU? And when my simulated GPU memory occupies more than 1 of the GPU memory, can I do GPU parallelism, and if so, in which part of the program can it be reflected?