production/GFS.v16: reduce initialization time on atm wave connector #228
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yangfanglin
approved these changes
Jan 12, 2021
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Description
There is a request to further reduce the time taken in the model initialization for GFS.v16 implementation. Following the suggestion from ESMF group, the number of export fields in fv3 has been reduced to 2 coupled fields for atm->ww3 coupling and the import fields have been removed. The initialization time on atm-wave connector becomes longer when larger number of nodes are used.
Testing
Tests have been done on hera and wcoss. On hera, the tests were done with 152 nodes, 3s improvement is seen. On wcoss, Fanglin's test shows 20s improves with 220 nodes.
Dependencies
Similar changes have been made in ww3. WW3 PR#295.
ufs-weather-model PR#363.