MetOffice / MetOffice/lfric_apps

Running on Genoa & Milan

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Dominant language
Fortran
Stars
31
Forks
118
Avg merge
2d 4h
Merged PRs (30d)
8

Description

## Constraints

* Normal Queue services both architectures
* Shared Queue only provides Milan architecture

## Considerations

* Code compilation builds should target Milan
* Code can be built on Milan with Genoa specific targeting included, to run on Genoa
* Do results bit-compare between Milan & Genoa:
* Using Milan craylibs then yes, bit compare is expected
* If we use Genoa specific compile flags, then this is not certain, but possible
* Can't use these craylibs yet, due to crashes (issue links: )
* Does this remove the `-S USE_GENOA=true` ?

## Requirements

1. Run large tests on Milan & Genoa
* Configure libfabric differently for these cases
* Configure task_dict sizing of I/O nodes differently
* Configure I/O Memory
2. Compile with Genoa specific flags on Milan to then run on Genoa
3. Run KGO checks on Milan & Genoa (perhaps 2 nodes or 4 nodes) for the same test case

Contributor guide

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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 locating the current Normal Queue and Shared Queue configuration, the USE_GENOA setting, and the large-test and KGO check entry points. Compare the existing libfabric, I/O-node task_dict, and I/O-memory settings for Milan and Genoa. Done means large tests and KGO checks run on both architectures, with Milan builds using Genoa-specific flags where required.

Written by the indexing model from the issue text.

Assessment

Tech stack
fortran
Domain
build-system, hpc, testing-qa
Issue type
Feature
Difficulty
5/5
Estimated time
Over a week
Activity status
Quiet
Clarity
Needs clarification
Newbie friendliness
35/100

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