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For someone like me who is familiar with JAX, but only recently starting to consider to pay attention to Julia (it does have a momentum), would it be possible to provide any good examples of using GPU / multiple GPUs from Julia?

I've tried to search on my own, but only a way to write CUDA-dependent code: https://juliagpu.gitlab.io/CUDA.jl/usage/multigpu/

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I'm not familiar with multi-GPU setup in general. GPU programming in Julia has the advantage that naive operation doesn't even need to be GPU-aware (for writers), since GPU arrays (of any vendor backend) conforms the AbstractArray interface.

If you're advanced library writer, you can leverage: https://juliagpu.github.io/KernelAbstractions.jl/stable/#Wri... which allows you to write kernel, in Julia, that compiles efficiently with rest of native Julia code, and that works cross-vendor!

Back to multi GPU, it seems there's: https://clima.github.io/OceananigansDocumentation/stable/app... which is MPI based?

https://www.juliapackages.com/p/pencilarrays is a really good tool to do this type of stuff automatically for some applications.

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