Regression Test Policy for Weather Model Platforms and Compilers

The regression test policy for the UFS weather model follows the general principles outlined in the Regression Test Policy for UFS Platforms and Compilers and the specific principles outlined in the Regression Test Policy for Medium-Range Weather App Platforms and Compilers. The details for the UFS weather model are outlined below.

Tier-1 platforms

Platform	Responsibility for tests	Test coverage	Status
NOAA WCOSS2 with default Intel 19 software stack	EMC	EMC-PROD tests (rt.conf)	Implemented
NOAA RDHPC Hera with default Intel 2022 software stack	EPIC/EMC	EMC-PROD tests (rt.conf)	Implemented
NOAA RDHPC Hera with GNU 9.1.0 software stack	EPIC/EMC	EPIC/EMC-PROD tests (rt_gnu.conf)	Implemented
NOAA RDHPC Gaea with default Intel 2021 software stack	EPIC/EMC	EMC-PROD tests (rt.conf)	Implemented
NOAA RDHPC Jet with default Intel 2022 software stack	EPIC/EMC	EMC-PROD tests (rt.conf)	Implemented
MSU Orion with default Intel 2022 software stack	EPIC/EMC	EPIC/EMC-PROD tests (rt.conf)	Implemented
NCAR CISL Cheyenne with Intel2022/SGI MPI software stack	EPIC/EMC	EMC-PROD tests (rt.conf)	Implemented
NCAR CISL Cheyenne with GNU 10.1.0/SGI MPI software stack	EPIC/EMC	EMC-PROD tests (rt_gnu.conf)	Implemented
AWS with docker container using GNU 9.3.0 software stack	EPIC/EMC	EMC-PROD tests (rt_gnu.conf)	Implemented

Status of supported software library stack

Platforms	Compilers	MPI	Python
WCOSS2	Intel 19
Hera	Intel 2022
Hera	GNU 9.1.0
Gaea	Intel 2021
Jet	Intel 2022
Orion	Intel 2022
Cheyenne	Intel2022
Cheyenne	GNU 10.1.0
AWS	GNU 9.3.0

Tier-2 platforms

Platform	Responsibility for tests	Test coverage	Status
Linux platforms with GNU 9.1.0 compiler and MPICH 3.3.1 MPI library (cloud platforms?)	TBD	TBD	Implemented
Linux platforms with Intel 19 compiler and MVAPICH2 2.3.2 MPI library (cloud platforms?)	TBD	TBD	Implemented
macOS platforms with LLVM clang 9.x.y + GNU gfortran 9.m.n compiler and mpich 3.r.s MPI library	TBD	TBD	Implemented
macOS platforms with GNU gcc+gfortran 9.x.y and mpich 3.r.s MPI library	TBD	TBD	Implemented

Tier-3 platforms

• Linux platforms with other combinations and/or other versions of the Intel or GNU compiler and MPI libraries than listed above.
• NAG compiler.
• clang/flang compiler: currently an open source development, the flang compiler is designed as a Fortran front-end for the LLVM clang compiler and may provide an interesting alternative in the future if/once matured (see this link for more information)