[Ncep.list.nems.announce] Correct MPI tag collision issue and increase array sizes to support integration of more domains

Thiago Quirino - NOAA Federal thiago.quirino at noaa.gov
Mon Oct 20 14:42:57 UTC 2014

Good morning, everyone.

I am ready to commit to the trunk. Regression tests were ran on Zeus and
all were passed successfully. The modifications are simple and don't change
the results. Please see below a list of modified files in Zeus:

Thiago.Quirino at fe2;/home/Thiago.Quirino/MODELS/NEMS_trunk> svn status
M       tests/RegressionTests_zeus.log
M       tests/Compile_zeus.log
M       src/atmos/phys/module_SF_GFDL.F90
M       src/atmos/nmm/module_CLOCKTIMES.F90
M       src/atmos/nmm/module_PARENT_CHILD_CPL_COMP.F90
M       src/atmos/nmm/module_NMM_GRID_COMP.F90

Please let me know of any issues.

All the best,

On Tue, Oct 14, 2014 at 11:07 AM, Thiago Quirino - NOAA Federal <
thiago.quirino at noaa.gov> wrote:

> Good morning, all. I would like to commit some changes after Jun Wang's
> commit .
> (1) A small fix to a rare event that can take place during nest motion.
> MPI tags generated by subroutine PARENT_SENDS_CHILD_DATA_LIMITS in
> "module_PARENT_CHILD_CPL_COMP.F90" may collide with the MPI tag expected by
> subroutine CHILDREN_RECV_PARENT_DATA. We increased the constant
> "PARENT_SHIFT_TAG=1113" used in the generation of tags used by the related
> "PARENT_SHIFT_TAG=1e8". This simple solution causes the MPI tags to be
> shifted out of the collision range. It also does not induce tag collisions
> with other MPI calls in the code.
> (2) We are starting to run NMMB with large number of domains. Tom has
> indicated a few arrays whose dimension should be increased to successfully
> run the model with increased number of domains. The modifications are to
> "module_CLOCKTIMES.F90" and "module_NMM_GRID_COMP.F90".
> (3) In "src/atmos/phys/module_SF_GFDL.F90", three total calls to
> subroutine "wrf_debug" seem to be generating a lot unnecessary log output.
> We propose to comment those out.
> I will post the code and the list of modified files after Jun Wang's
> commit.
> Thank you so much. This is my first time submitting a ticket so please let
> me know of any issues or if I am doing something wrong.
> Best,
> Thiago.
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