Lfric2lfric multi cpu test

[Juan Manuel Castillo Sanchez (ukmo-juan-castillo)]

PR Summary

Sci/Tech Reviewer:
Code Reviewer: mo-marqh

This PR simply adds rose stem tests to compare running lfric2lfric with multiple CPUs.

• closes lfric2lfric: add multi CPU tests #366
• fixes lfric2lfric: add multi CPU tests #366
• is related to lfric2lfric: run with multiple CPUs #192

Code Quality Checklist

• I have performed a self-review of my own code
• My code follows the project's style guidelines
• Comments have been included that aid understanding and enhance the readability of the code
• My changes generate no new warnings
• All automated checks in the CI pipeline have completed successfully

Testing

• I have tested this change locally, using the LFRic Apps rose-stem suite
• If any tests fail (rose-stem or CI) the reason is understood and acceptable (e.g. kgo changes)
• I have added tests to cover new functionality as appropriate (e.g. system tests, unit tests, etc.)
• Any new tests have been assigned an appropriate amount of compute resource and have been allocated to an appropriate testing group (i.e. the developer tests are for jobs which use a small amount of compute resource and complete in a matter of minutes)

trac.log

Test Suite Results - lfric_apps - lfric2lfric_multi_CPU_test/run1

Suite Information

Item	Value
Suite Name	lfric2lfric_multi_CPU_test/run1
Suite User	juan.m.castillo
Workflow Start	2026-03-24T17:31:54
Groups Run	lfric2lfric', 'scripts

Dependency	Reference	Main Like
casim	MetOffice/casim@2026.03.2	True
jules	MetOffice/jules@2026.03.2	True
lfric_apps	ukmo-juan-castillo/lfric_apps@lfric2lfric_multi_CPU_test	False
lfric_core	MetOffice/lfric_core@018e40c	True
moci	MetOffice/moci@2026.03.2	True
SimSys_Scripts	MetOffice/SimSys_Scripts@4387949	True
socrates	MetOffice/socrates@2026.03.2	True
socrates-spectral	MetOffice/socrates-spectral@2026.03.2	True
ukca	MetOffice/ukca@2026.03.2	True

Task Information

✅ succeeded tasks - 106

I just run the lfric2lfric tests as they are the only ones affected by these changes. I compared results with #275 and they do not change. Output generated with 1 CPU and multiple CPUs is the same.

Security Considerations

• I have reviewed my changes for potential security issues
• Sensitive data is properly handled (if applicable)
• Authentication and authorisation are properly implemented (if applicable)

Performance Impact

• Performance of the code has been considered and, if applicable, suitable performance measurements have been conducted

AI Assistance and Attribution

• Some of the content of this change has been produced with the assistance of Generative AI tool name (e.g., Met Office Github Copilot Enterprise, Github Copilot Personal, ChatGPT GPT-4, etc) and I have followed the Simulation Systems AI policy (including attribution labels)

Documentation

• Where appropriate I have updated documentation related to this change and confirmed that it builds correctly

PSyclone Approval

• If you have edited any PSyclone-related code (e.g. PSyKAl-lite, Kernel interface, optimisation scripts, LFRic data structure code) then please contact the TCD Team

Sci/Tech Review

• I understand this area of code and the changes being added
• The proposed changes correspond to the pull request description
• Documentation is sufficient (do documentation papers need updating)
• Sufficient testing has been completed

(Please alert the code reviewer via a tag when you have approved the SR)

Code Review

• All dependencies have been resolved
• Related Issues have been properly linked and addressed
• CLA compliance has been confirmed
• Code quality standards have been met
• Tests are adequate and have passed
• Documentation is complete and accurate
• Security considerations have been addressed
• Performance impact is acceptable

[Lottie Turner (mo-lottieturner)]

It looks like checksum_lfric2lfric_oasis_clim_gal9_C12-ral_seuk_C16_lam-lbc_4cpu_azspice_gnu_fast-debug-64bit.txt is the same as checksum_lfric2lfric_oasis_clim_gal9_C12-ral_seuk_C16_lam-lbc_1cpu_azspice_gnu_fast-debug-64bit.txt - have you checked the other new kgos to see if they are the same as their single-cpu equivalents?