MetOffice / MetOffice/lfric_apps
Underutilised make threads
@oakleybrunt is already working on this.
Since Apr 21, 2026.
- Dominant language
- Fortran
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Description
### Are there any linked Issues or Pull Requests?
_No response_
### Brief description
Not all available threads/cpus are utilised in every build case. The number of make threads is hard coded to 6, leaving up to 18 on the table in the most severe cases.
### Further details of the issue.
Some build tasks, especially those on EX1A platform, use 24 cpus to build (e.g. lfric_atm). The hard-coded number of threads used to build any application is 6. This is making build times longer than they need to be.
> [!NOTE]
> Some tasks only have 6 cpus allocated, so the hard coded value cannot be simply changed to a higher value.
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