MetOffice / MetOffice/PSyTran

Deep PSyKAl-lite operators

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LFRic apps no PSyclone issue PSyKAl-lite
Dominant language
Python
Stars
3
Forks
2
PR merge metrics
No merged PRs in 30d

Description

The following deep operators I believe exist to calculate the operations within halo cells and be marked as clean after -

* `invoke_deep_X_times_Y`
* `invoke_deep_X_divideby_Y`
* `invoke_deep_shift_mass`

found in LFRic apps `science/gungho/source/psy/psykal_lite_transport_mod`. These are all called by `science/gungho/source/algorithm/transport/common/transport_runtime_alg_mod.x90`.

I could not find a relevant PSyclone issue for this. There was an attempt to avoid the need for the PSyKAl-lite code in [LFRic #4302](https://code.metoffice.gov.uk/trac/lfric/ticket/4302), however, this was closed.

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by inspecting the three named deep operators in science/gungho/source/psy/psykal_lite_transport_mod and their calls from science/gungho/source/algorithm/transport/common/transport_runtime_alg_mod.x90. Determine how these halo-cell operations are represented and what marks them clean; done means the operators are handled consistently without relying on the closed LFRic attempt.

Written by the indexing model from the issue text.

Assessment

Tech stack
fortran
Domain
compilers, tooling
Issue type
Feature
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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