ICCS Deliverable 5 - Githubissues

fetch4 / GISS-GC

Development repository for GEOS-Chem as an alternative online chemical operator for GISS ModelE2.1

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ICCS Deliverable 5 #27

Open jwallwork23 opened 3 months ago

jwallwork23 commented 3 months ago

General performance enhancements.

Lee doesn't have anything in particular in mind for this, just anything that might improve the performance.

In terms of parallelism:

No one usually uses OpenMP on the GISS side, just MPI.
Maximum of 88 MPI processes on the GISS side because parallelism is over latitude bands, of which there are 88.
OpenMP tends to be useful only up to 12 threads in GEOS-Chem.
Investigate GCHP.