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Notes on tags used in MITgcmUV |
Notes on tags used in MITgcmUV |
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============================== |
============================== |
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o adjoint: |
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global_sum_ad was incomplete (noted many times by many people ;) |
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nice description by Jean U. as follows: |
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* allreduce(var) in global_sum.F can be interpreted as |
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reduce(sum) followed by broadcast of sum. |
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* The adjoint of that is |
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sum(adjoint) followed by broadcast(summed adjoint value) |
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or in other words, allreduce(sum, adjoint vars) |
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We were missing the sum(adjoint)! |
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Benign, except(!) for "global" scalars appearing in tile loops (bi,bj) |
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(noted by J.M. Campin, e.g., in cost_ssh_mean, variable offset). |
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The fix should produce 16-digit accuracy between |
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single-CPU multi-tile (e.g. nSx=2, nPx=1) and |
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multi-CPU single-tile (e.g. nSx=1, nPx-2) |
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We'll probably change this yet again shortly |
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o eesupp/src: |
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- fix global_sum_r4 (wrong from previous modif in Jun 2009; ever used ?) |
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o pkg/icefront |
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- ALLOW_SUBGLACIAL_RUNOFF option adds capability for time-evolving |
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specification of addmass array based on a 2D field, which is added |
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at bottommost wet level at each horizontal location. |
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o model/src: |
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horizontal grid initialisation (other than curvilinear): add code for Exch2 IO |
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layout; (not always compatible with delX,delY setting; commented out for now). |
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o pkg/exch2: |
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change tile to processor setting (case nSy*nPy > 1): allows default model mapping |
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(myX and myYGlobalLow) to be used for simple (1 facet, no blank tile) config. |
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checkpoint62e (2010/04/15) |
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o pkg/obcs: |
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- fix wrong index in OBCS_SPONGE_V for Eastern-OB (reported by David Hebert). |
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o pkg/dic: |
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-fix bug in fe_chem.F for multi-tile (nSx*nSy > 1) set-up; |
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(note: not presently tested in any forward verification exp.) |
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update tutorial_global_oce_biogeo AD output file. |
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o pkg/exf: |
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- account for the variation of albedo as a function of zenith angle |
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by defining ALLOW_ZENITHANGLE in EXF_OPTIONS.h |
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o build_options: |
o build_options: |
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- rename "linux_ia64_ifort+mpi_ice_nas" to "linux_amd64_ifort+mpi_ice_nas" |
- rename "linux_ia64_ifort+mpi_ice_nas" to "linux_amd64_ifort+mpi_ice_nas" |
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o pkg/dic: |
o pkg/dic: |
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