Add support for exchanging ghost cells

jipolanco / PencilArrays.jl

Distributed Julia arrays using the MPI protocol

https://jipolanco.github.io/PencilArrays.jl/dev/

MIT License

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Add support for exchanging ghost cells #1

Open jipolanco opened 4 years ago

jipolanco commented 4 years ago

Add support for exchanging neighbouring data between MPI processes.

The user should be able to select the number of planes to exchange along each decomposed dimension.
In principle, the number of exchanged planes may be different for each dimension.
To make the implementation easy, only support exchanges with a single process along each dimension (limiting the maximum possible number of exchanged planes). This may be extended in the future.

chowland commented 1 year ago

Hi @jipolanco, just thought I would let you know that I am starting to work on this in a new repo HaloPencils. I'm using the approach of 2decomp as a guide, since that is what I'm most familiar with. I'm at a very early stage, and progress may be slow as this is not my main research focus, but if you think this is a useful implementation, then I would be happy to consider merging this into PencilArrays once it's ready for use.

jipolanco commented 1 year ago

Looks great! I'll be very happy to include this in PencilArrays once this is ready to use. Let me know if I can be of any help.