release/public-v2: bit-for-bit reproducibility for regional runs when changing MPI decomposition #409
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This was referenced Feb 7, 2021
climbfuji
requested review from
DusanJovic-NOAA,
junwang-noaa and
JamesAbeles-NOAA
…for release/public-v2
junwang-noaa
approved these changes
Feb 9, 2021
|
Thanks @junwang-noaa ! I'll wait until jet is back, rerun the tests there and merge afterwards. |
epic-cicd-jenkins
pushed a commit
that referenced
this pull request
Apr 17, 2023
* Add default namelist with SPP entries. * Changes necessary to run with SPP * Typo fix in generate script. * Changes to implement SPP. * Add comment regarding use of SPP. * Pass N_VAR_SPP to the var_defns.sh file.
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Description
These PRs solve the b4b reproducibility issues for regional runs when changing the MPI layout (decomposition) as described in #288.
With the changes in NOAA-GFDL/GFDL_atmos_cubed_sphere#68, results are b4b identical in DEBUG, REPRO and PROD mode when the dycore is compiled in 64bit, regardless of the physics suite.
When the dycore is compiled din 32bit, results are b4b identical in DEBUG, REPRO and PROD mode for the RRFSv1alpha suite (or, more generally, any suite that does not use GFDL-MP with saturation adjustment = fast physics turned on). Results are b4b identical in DEBUG and REPRO mode (but not in PROD mode) for the GFSv15p2 suite (which uses GFDL-MP with saturation adjustment = fast physics turned on).
Additional regression tests were added to
tests/rt.confto provide the necessary test coverage going forward. Note that for release/public-v2,32BIT=Yis the default and thus note explicitly spelled out inrt.conf.Also: added orion.intel to the tier-1 platforms for release/public-v2.
Issue(s) addressed
These PRs solve the "b4b reproducibility for regional runs on the ESG grid when changing the MPI decomposition" of issue #288.
Testing
Regression tests passed on all tier-1 platforms for release/public-v2, including the newly added orion.intel.
Dependencies
NOAA-GFDL/GFDL_atmos_cubed_sphere#68
NOAA-EMC/fv3atm#245
#409