[Wrf-users] Radiative transfer performance in DM+SM run
Matthew.Foster at noaa.gov
Fri Jan 7 06:00:01 MST 2011
During some recent testing of a newly-configured domain (474x474, 3km) I
noticed a rather significant difference in the performance of the
radiative transfer (RRTM/Dudhia) when running a DM+SM build. The
radiative transfer timesteps are sometimes as much as 60% longer in
DM+SM vs DM. I've found this to be true with either OpenMPI or
MVAPICH2, although it seems to be more pronounced with MVAPICH2.
Does anyone know why I'm seeing this behavior?
Do not go where the path may lead; go instead where there is no path and leave a trail.
-- Ralph Waldo Emerson
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