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initialize two arrays and fix fortran coding error plus PRs #285 and #276 #280

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merged 11 commits into from
Sep 29, 2023
Merged

initialize two arrays and fix fortran coding error plus PRs #285 and #276 #280

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b2b148e
change missing value to the same as physics 9.99e20
junwang-noaa May 31, 2023
bf56ee6
Merge remote-tracking branch 'upstream/dev/emc' into missingvalue
junwang-noaa Jul 5, 2023
b8baff3
fix fortran coding error
SamuelTrahanNOAA Aug 4, 2023
afab1e8
initialize srf_wnd_var2 and tracers_var3 arrays
SamuelTrahanNOAA Sep 9, 2023
9da28bf
Write netcdf axis variables using the same real kind as data variables
DusanJovic-NOAA Sep 11, 2023
bceee88
tools/fv_io: add missing else statement and ensures all _is_open vari…
laurenchilutti Sep 22, 2023
a096540
Merge remote-tracking branch 'upstream/dev/emc' into bugfix/string-le…
SamuelTrahanNOAA Sep 25, 2023
81f254d
Merge remote-tracking branch 'dusan/axis_type' into bugfix/string-len…
SamuelTrahanNOAA Sep 25, 2023
f80df3f
Merge remote-tracking branch 'upstream/dev/emc' into bugfix/string-le…
SamuelTrahanNOAA Sep 26, 2023
eb6a558
Merge remote-tracking branch 'laurenchilutti/fv_io_emc' into bugfix/s…
SamuelTrahanNOAA Sep 28, 2023
d5ed1e7
Merge remote-tracking branch 'jun/missingvalue' into bugfix/string-le…
SamuelTrahanNOAA Sep 29, 2023
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4 changes: 3 additions & 1 deletion driver/fvGFS/fv_ufs_restart_io.F90
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Original file line number Diff line number Diff line change
Expand Up @@ -132,6 +132,7 @@ subroutine fv_dyn_restart_register (Atm)
! srf_wnd
nvar2d_srf_wnd = 2
allocate (srf_wnd_var2(nx,ny,nvar2d_srf_wnd), srf_wnd_var2_names(nvar2d_srf_wnd))
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srf_wnd_var2 = 0.0
srf_wnd_var2_names(1) = 'u_srf'
srf_wnd_var2_names(2) = 'v_srf'

Expand All @@ -141,6 +142,7 @@ subroutine fv_dyn_restart_register (Atm)
nvar3d_tracers = ntprog+ntdiag
tracers_zsize = size(Atm%q,3)
allocate (tracers_var3(nx,ny,tracers_zsize,nvar3d_tracers), tracers_var3_names(nvar3d_tracers))
tracers_var3 = 0.0
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Best practice in multi-threaded simulations is to loop over elements to ensure each cell is allocated on the correct thread, although modern compilers might get around this.

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Normally you would be right, but not here. The correct thread is the master thread.

The rest of fv_ufs_restart_io.F90 does not use OpenMP directives. Hence, tracers_var3 is only ever used by the master thread. Using OpenMP to initialize tracers_var3 would distribute it across multiple CPUs. If some threads are in different NUMA nodes than the master thread, then this will slow down the program.

Adding OpenMP directives throughout fv_ufs_restart_io.F90 is outside the scope of this PR. Also, there may be good reasons why the restart code is single-threaded. I can't think of any, but somebody probably implemented it this way for a reason.


do nt = 1, ntprog
call get_tracer_names(MODEL_ATMOS, nt, tracer_name)
Expand Down Expand Up @@ -446,7 +448,7 @@ subroutine add_zaxis_to_field(field, axis_name, num_levels)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, line=__LINE__, file=__FILE__)) return

call ESMF_AttributeAdd(field, convention="NetCDF", purpose="FV3-dim", &
attrList=(/trim(axis_name),trim(axis_name)//":cartesian_axis"/), rc=rc)
attrList=(/trim(axis_name)//" ",trim(axis_name)//":cartesian_axis"/), rc=rc)
if (ESMF_LogFoundError(rcToCheck=rc, msg=ESMF_LOGERR_PASSTHRU, line=__LINE__, file=__FILE__)) return

allocate( buffer(num_levels) )
Expand Down