| [75] | 1 | SUBROUTINE exchange_horiz( ar ) |
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| [1] | 2 | |
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| 3 | !------------------------------------------------------------------------------! |
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| [484] | 4 | ! Current revisions: |
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| [1] | 5 | ! ----------------- |
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| [77] | 6 | ! |
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| [1] | 7 | ! |
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| 8 | ! Former revisions: |
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| 9 | ! ----------------- |
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| [3] | 10 | ! $Id: exchange_horiz.f90 484 2010-02-05 07:36:54Z raasch $ |
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| [77] | 11 | ! |
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| 12 | ! 75 2007-03-22 09:54:05Z raasch |
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| 13 | ! Special cases for additional gridpoints along x or y in case of non-cyclic |
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| 14 | ! boundary conditions are not regarded any more |
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| 15 | ! |
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| [3] | 16 | ! RCS Log replace by Id keyword, revision history cleaned up |
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| 17 | ! |
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| [1] | 18 | ! Revision 1.16 2006/02/23 12:19:08 raasch |
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| 19 | ! anz_yz renamed ngp_yz |
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| 20 | ! |
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| 21 | ! Revision 1.1 1997/07/24 11:13:29 raasch |
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| 22 | ! Initial revision |
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| 23 | ! |
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| 24 | ! |
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| 25 | ! Description: |
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| 26 | ! ------------ |
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| 27 | ! Exchange of lateral boundary values (parallel computers) and cyclic |
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| 28 | ! lateral boundary conditions, respectively. |
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| 29 | !------------------------------------------------------------------------------! |
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| 30 | |
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| 31 | USE control_parameters |
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| 32 | USE cpulog |
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| 33 | USE indices |
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| 34 | USE interfaces |
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| 35 | USE pegrid |
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| 36 | |
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| 37 | IMPLICIT NONE |
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| 38 | |
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| 39 | #if defined( __parallel ) |
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| 40 | INTEGER, DIMENSION(4) :: req |
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| 41 | INTEGER, DIMENSION(MPI_STATUS_SIZE,4) :: wait_stat |
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| 42 | #endif |
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| 43 | |
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| [75] | 44 | REAL :: ar(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) |
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| [1] | 45 | |
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| 46 | |
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| 47 | CALL cpu_log( log_point_s(2), 'exchange_horiz', 'start' ) |
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| 48 | |
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| 49 | #if defined( __parallel ) |
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| 50 | |
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| 51 | ! |
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| 52 | !-- Exchange of lateral boundary values for parallel computers |
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| 53 | IF ( pdims(1) == 1 .OR. mg_switch_to_pe0 ) THEN |
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| 54 | ! |
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| 55 | !-- One-dimensional decomposition along y, boundary values can be exchanged |
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| 56 | !-- within the PE memory |
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| 57 | IF ( bc_lr == 'cyclic' ) THEN |
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| 58 | ar(:,nys:nyn,nxl-1) = ar(:,nys:nyn,nxr) |
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| 59 | ar(:,nys:nyn,nxr+1) = ar(:,nys:nyn,nxl) |
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| 60 | ENDIF |
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| 61 | |
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| 62 | ELSE |
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| [75] | 63 | |
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| [1] | 64 | req = 0 |
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| 65 | ! |
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| 66 | !-- Send left boundary, receive right one |
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| 67 | CALL MPI_ISEND( & |
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| 68 | ar(nzb,nys-1,nxl), ngp_yz(grid_level), MPI_REAL, pleft, 0, & |
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| 69 | comm2d, req(1), ierr ) |
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| 70 | CALL MPI_IRECV( & |
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| 71 | ar(nzb,nys-1,nxr+1), ngp_yz(grid_level), MPI_REAL, pright, 0, & |
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| 72 | comm2d, req(2), ierr ) |
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| 73 | ! |
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| 74 | !-- Send right boundary, receive left one |
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| 75 | CALL MPI_ISEND( & |
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| 76 | ar(nzb,nys-1,nxr), ngp_yz(grid_level), MPI_REAL, pright, 1, & |
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| 77 | comm2d, req(3), ierr ) |
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| 78 | CALL MPI_IRECV( & |
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| 79 | ar(nzb,nys-1,nxl-1), ngp_yz(grid_level), MPI_REAL, pleft, 1, & |
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| 80 | comm2d, req(4), ierr ) |
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| [75] | 81 | CALL MPI_WAITALL( 4, req, wait_stat, ierr ) |
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| 82 | |
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| [1] | 83 | ENDIF |
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| 84 | |
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| 85 | |
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| 86 | IF ( pdims(2) == 1 .OR. mg_switch_to_pe0 ) THEN |
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| 87 | ! |
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| 88 | !-- One-dimensional decomposition along x, boundary values can be exchanged |
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| 89 | !-- within the PE memory |
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| 90 | IF ( bc_ns == 'cyclic' ) THEN |
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| 91 | ar(:,nys-1,:) = ar(:,nyn,:) |
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| 92 | ar(:,nyn+1,:) = ar(:,nys,:) |
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| 93 | ENDIF |
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| 94 | |
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| 95 | ELSE |
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| 96 | |
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| 97 | req = 0 |
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| 98 | ! |
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| 99 | !-- Send front boundary, receive rear one |
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| [75] | 100 | CALL MPI_ISEND( ar(nzb,nys,nxl-1), 1, type_xz(grid_level), psouth, 0, & |
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| 101 | comm2d, req(1), ierr ) |
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| 102 | CALL MPI_IRECV( ar(nzb,nyn+1,nxl-1), 1, type_xz(grid_level), pnorth, 0, & |
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| 103 | comm2d, req(2), ierr ) |
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| [1] | 104 | ! |
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| 105 | !-- Send rear boundary, receive front one |
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| [75] | 106 | CALL MPI_ISEND( ar(nzb,nyn,nxl-1), 1, type_xz(grid_level), pnorth, 1, & |
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| 107 | comm2d, req(3), ierr ) |
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| 108 | CALL MPI_IRECV( ar(nzb,nys-1,nxl-1), 1, type_xz(grid_level), psouth, 1, & |
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| 109 | comm2d, req(4), ierr ) |
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| 110 | call MPI_WAITALL( 4, req, wait_stat, ierr ) |
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| 111 | |
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| [1] | 112 | ENDIF |
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| 113 | |
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| 114 | |
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| 115 | #else |
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| 116 | |
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| 117 | ! |
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| 118 | !-- Lateral boundary conditions in the non-parallel case |
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| 119 | IF ( bc_lr == 'cyclic' ) THEN |
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| 120 | ar(:,nys:nyn,nxl-1) = ar(:,nys:nyn,nxr) |
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| 121 | ar(:,nys:nyn,nxr+1) = ar(:,nys:nyn,nxl) |
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| 122 | ENDIF |
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| 123 | |
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| 124 | IF ( bc_ns == 'cyclic' ) THEN |
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| 125 | ar(:,nys-1,:) = ar(:,nyn,:) |
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| 126 | ar(:,nyn+1,:) = ar(:,nys,:) |
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| 127 | ENDIF |
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| 128 | |
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| 129 | #endif |
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| 130 | |
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| 131 | CALL cpu_log( log_point_s(2), 'exchange_horiz', 'stop' ) |
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| 132 | |
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| 133 | END SUBROUTINE exchange_horiz |
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