Name and subject of the action
Last edition: Wikinfo(changed_ts)? by Wikinfo(changed_by)?
The PI is responsible to closely follow the progress of the action, and especially to contact NEMO project manager if the delay on preview (or review) are longer than the 2 weeks expected.
Summary
| Action | Tuning of the MPI3 collective neighbours communications |
|---|---|
| PI(S) | Silvia Mocavero, Italo Epicoco |
| Digest | Revision of the MPI3 collective neighbours communications with the aim to use 5-point or 9-point stencil. Add new support needed for BDY communication. |
| Dependencies | |
| Branch | source:/NEMO/branches/{YEAR}/dev_r{REV}_{ACTION_NAME} |
| Previewer(s) | TBD |
| Reviewer(s) | TBD |
| Ticket | #2609 |
Description
Following the 2020 Neighbours Collective (MPI3) work (#2496) this action aims to introduce the 5-points stencil exchange in the Nemo code when data dependencies are satisfied without diagonal exchange.
In particular the communication calls to 5-point have been set on the advection schemes of TRA submodule.
The modifications have been introduced in the NEMO/branches/2021/dev_r14393_HPC-03_Mele_Comm_Cleanup/ starting from the changeset 14776.
Both activities were indeed related to MPI communications.
Implementation
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Documentation updates
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Preview
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Tests
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Review
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