View source for Fixing OpenMP in WRF-Fire in WRF4.0+

[[Category:WRF-Fire merge]]
==Description of the issue==
The {{wrf-fire-merge-commit|e26f21f|fire model changes}} in WRF4.0 were done with MPI in mind only. The changes include replacement of the level set method and vertical log interpolation of horizontal wind, similar to what was done in {{wrf-fire-merge-commit|89a2e77b|WRF-SFIRE in February 2011}}. The WRF 4.0 version produces inconsistent results with OpenMP parallelism only, compiled without MPI, and crashes when both OpenMP and MPI are used.

==Progress==
* {{wrf-fire-merge-commit|d54ccd6a|protecting HALO by OMP MASTER and OMP BARRIER}
* fixed the crash but inconsistencies remain, first seen in VAH and VF before the fire is ignited, in two_fires/wrfout_d01_2006-01-01_09:02:00. Tested with 1 thread vs 36 threads.