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C $Header: /u/gcmpack/MITgcm/pkg/ex3/ex3_set_glbe_inds.F,v 1.1 2006/02/06 21:09:54 edhill Exp $ |
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C $Name: $ |
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#include "EX3_OPTIONS.h" |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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CBOP |
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C !ROUTINE: EX3_SET_GLBE_INDS |
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C !INTERFACE: |
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SUBROUTINE EX3_SET_GLBE_INDS |
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C !DESCRIPTION: |
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C Determine the global/local buffer indicies for send/recv |
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C operations at each edge |
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C !USES: |
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IMPLICIT NONE |
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#include "SIZE.h" |
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#include "EEPARAMS.h" |
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#include "EESUPPORT.h" |
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#include "EX3_SIZE.h" |
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#include "EX3_PARAMS.h" |
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#include "EX3_TOPOLOGY.h" |
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CEOP |
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C !LOCAL VARIABLES: |
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INTEGER ke, kt, ii, itile |
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C The idea here is that RECV operations should *ALWAYS* happen |
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C within the first buffer of the receiving tile and send operations |
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C will happen in either: |
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C |
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C . MPI :: the second index of the sending tile |
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C . LOCAL :: the first index of the receiving tile |
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C |
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C So, whenever possible, local operations will bypass MPI. |
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C First set all tiles to non-local status |
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DO kt = 1,EX3_MAX_TILES |
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DO ke = 1,EX3_MAX_E_NBS |
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ex3_e_iopt_il(ke,kt) = -1 |
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ENDDO |
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ENDDO |
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C EX3_B_RL ( EX3_MAX_BL, 2*EX3_MAX_E_NBS, nSx*nSy ) |
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C Then, for only the local tiles, set the flag to the local buffer |
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C index to use for for send operations |
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DO ii = 1,ex3_p_ntile |
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itile = ex3_p_itile(ii) |
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DO ke = 1,EX3_MAX_E_NBS |
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ex3_e_iopt_il(ke,itile) = |
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& (ii-1)*2*EX3_MAX_E_NBS + 2*(ke-1) + 1 |
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ENDDO |
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ENDDO |
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RETURN |
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END |
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C---+----1----+----2----+----3----+----4----+----5----+----6----+----7-|--+----| |
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