[1] | 1 | SUBROUTINE exchange_horiz( ar, xrp, ynp ) |
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| 2 | |
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| 3 | !------------------------------------------------------------------------------! |
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| 4 | ! Actual revisions: |
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| 5 | ! ----------------- |
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| 6 | ! |
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| 7 | ! |
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| 8 | ! Former revisions: |
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| 9 | ! ----------------- |
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| 10 | ! $Log: exchange_horiz.f90,v $ |
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| 11 | ! Revision 1.16 2006/02/23 12:19:08 raasch |
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| 12 | ! anz_yz renamed ngp_yz |
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| 13 | ! |
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| 14 | ! Revision 1.15 2005/03/26 20:20:39 raasch |
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| 15 | ! Extensions for non-cyclic boundary conditions along x or y |
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| 16 | ! |
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| 17 | ! Revision 1.14 2003/10/29 08:51:10 raasch |
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| 18 | ! Exchange of boundaries within the PE memory in case that multigrid method |
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| 19 | ! has switched to PE0 only |
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| 20 | ! |
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| 21 | ! Revision 1.13 2003/03/16 09:30:38 raasch |
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| 22 | ! Two underscores (_) are placed in front of all define-strings |
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| 23 | ! |
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| 24 | ! Revision 1.12 2002/12/20 10:40:08 raasch |
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| 25 | ! Integer variables will be defined in the parallel case only |
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| 26 | ! |
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| 27 | ! Revision 1.11 2002/12/19 14:46:43 raasch |
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| 28 | ! Cyclic boundary conditions along y used instead of sendrecv in case of |
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| 29 | ! pdims(2)=1. SENDRECV replaced by nonblocking routines ISEND and IRECV. |
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| 30 | ! Array "feld" is renamed to "ar". |
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| 31 | ! |
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| 32 | ! Revision 1.9 2002/04/16 08:16:50 08:16:50 raasch (Siegfried Raasch) |
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| 33 | ! Cyclic boundary conditions along x used instead of sendrecv in case of |
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| 34 | ! pdims(1)=1 |
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| 35 | ! |
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| 36 | ! Revision 1.8 2001/07/20 13:04:59 raasch |
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| 37 | ! anz_yz and type_xz changed to arrays to allow for the boundary value exchange |
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| 38 | ! for the different grid levels used in the multigrid method, |
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| 39 | ! +module control_parameters |
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| 40 | ! |
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| 41 | ! Revision 1.7 2001/03/30 07:23:00 raasch |
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| 42 | ! Translation of remaining German identifiers (variables, subroutines, etc.) |
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| 43 | ! |
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| 44 | ! Revision 1.6 2001/01/22 06:36:07 raasch |
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| 45 | ! Module test_variables removed |
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| 46 | ! |
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| 47 | ! Revision 1.5 2000/12/20 12:06:44 letzel |
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| 48 | ! All comments translated into English. |
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| 49 | ! |
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| 50 | ! Revision 1.4 1998/07/06 12:13:36 raasch |
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| 51 | ! + USE test_variables |
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| 52 | ! |
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| 53 | ! Revision 1.3 1998/01/23 09:57:45 raasch |
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| 54 | ! Umbenennung von anz_yz_p in anz_yz sowie von type_xz_p in type_xz |
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| 55 | ! |
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| 56 | ! Revision 1.2 1997/08/11 06:14:55 raasch |
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| 57 | ! Felder werden jetzt ueber Formalparameter uebergeben. |
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| 58 | ! |
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| 59 | ! Revision 1.1 1997/07/24 11:13:29 raasch |
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| 60 | ! Initial revision |
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| 61 | ! |
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| 62 | ! |
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| 63 | ! Description: |
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| 64 | ! ------------ |
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| 65 | ! Exchange of lateral boundary values (parallel computers) and cyclic |
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| 66 | ! lateral boundary conditions, respectively. |
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| 67 | !------------------------------------------------------------------------------! |
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| 68 | |
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| 69 | USE control_parameters |
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| 70 | USE cpulog |
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| 71 | USE indices |
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| 72 | USE interfaces |
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| 73 | USE pegrid |
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| 74 | |
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| 75 | IMPLICIT NONE |
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| 76 | |
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| 77 | INTEGER :: xrp, ynp |
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| 78 | |
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| 79 | #if defined( __parallel ) |
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| 80 | INTEGER :: typexz |
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| 81 | INTEGER, DIMENSION(4) :: req |
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| 82 | INTEGER, DIMENSION(MPI_STATUS_SIZE,4) :: wait_stat |
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| 83 | #endif |
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| 84 | |
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| 85 | REAL :: ar(nzb:nzt+1,nys-1:nyn+ynp+1,nxl-1:nxr+xrp+1) |
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| 86 | |
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| 87 | |
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| 88 | CALL cpu_log( log_point_s(2), 'exchange_horiz', 'start' ) |
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| 89 | |
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| 90 | #if defined( __parallel ) |
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| 91 | |
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| 92 | ! |
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| 93 | !-- Exchange of lateral boundary values for parallel computers |
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| 94 | IF ( pdims(1) == 1 .OR. mg_switch_to_pe0 ) THEN |
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| 95 | ! |
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| 96 | !-- One-dimensional decomposition along y, boundary values can be exchanged |
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| 97 | !-- within the PE memory |
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| 98 | IF ( bc_lr == 'cyclic' ) THEN |
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| 99 | ar(:,nys:nyn,nxl-1) = ar(:,nys:nyn,nxr) |
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| 100 | ar(:,nys:nyn,nxr+1) = ar(:,nys:nyn,nxl) |
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| 101 | ENDIF |
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| 102 | |
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| 103 | ELSE |
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| 104 | req = 0 |
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| 105 | ! |
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| 106 | !-- Send left boundary, receive right one |
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| 107 | CALL MPI_ISEND( & |
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| 108 | ar(nzb,nys-1,nxl), ngp_yz(grid_level), MPI_REAL, pleft, 0, & |
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| 109 | comm2d, req(1), ierr ) |
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| 110 | CALL MPI_IRECV( & |
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| 111 | ar(nzb,nys-1,nxr+1), ngp_yz(grid_level), MPI_REAL, pright, 0, & |
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| 112 | comm2d, req(2), ierr ) |
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| 113 | ! |
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| 114 | !-- Send right boundary, receive left one |
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| 115 | CALL MPI_ISEND( & |
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| 116 | ar(nzb,nys-1,nxr), ngp_yz(grid_level), MPI_REAL, pright, 1, & |
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| 117 | comm2d, req(3), ierr ) |
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| 118 | CALL MPI_IRECV( & |
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| 119 | ar(nzb,nys-1,nxl-1), ngp_yz(grid_level), MPI_REAL, pleft, 1, & |
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| 120 | comm2d, req(4), ierr ) |
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| 121 | call MPI_Waitall (4,req,wait_stat,ierr) |
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| 122 | ENDIF |
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| 123 | |
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| 124 | |
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| 125 | IF ( pdims(2) == 1 .OR. mg_switch_to_pe0 ) THEN |
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| 126 | ! |
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| 127 | !-- One-dimensional decomposition along x, boundary values can be exchanged |
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| 128 | !-- within the PE memory |
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| 129 | IF ( bc_ns == 'cyclic' ) THEN |
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| 130 | ar(:,nys-1,:) = ar(:,nyn,:) |
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| 131 | ar(:,nyn+1,:) = ar(:,nys,:) |
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| 132 | ENDIF |
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| 133 | |
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| 134 | ELSE |
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| 135 | ! |
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| 136 | !-- Set the MPI data type, which depends on the size of the array |
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| 137 | !-- (the v array has an additional gridpoint along y in case of non-cyclic |
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| 138 | !-- boundary conditions) |
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| 139 | IF ( ynp == 0 ) THEN |
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| 140 | typexz = type_xz(grid_level) |
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| 141 | ELSE |
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| 142 | typexz = type_xz_p |
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| 143 | ENDIF |
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| 144 | |
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| 145 | req = 0 |
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| 146 | ! |
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| 147 | !-- Send front boundary, receive rear one |
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| 148 | CALL MPI_ISEND( ar(nzb,nys,nxl-1), 1, typexz, psouth, 0, comm2d, & |
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| 149 | req(1), ierr ) |
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| 150 | CALL MPI_IRECV( ar(nzb,nyn+1,nxl-1), 1, typexz, pnorth, 0, comm2d, & |
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| 151 | req(2), ierr ) |
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| 152 | ! |
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| 153 | !-- Send rear boundary, receive front one |
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| 154 | CALL MPI_ISEND( ar(nzb,nyn,nxl-1), 1, typexz, pnorth, 1, comm2d, & |
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| 155 | req(3), ierr ) |
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| 156 | CALL MPI_IRECV( ar(nzb,nys-1,nxl-1), 1, typexz, psouth, 1, comm2d, & |
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| 157 | req(4), ierr ) |
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| 158 | call MPI_Waitall (4,req,wait_stat,ierr) |
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| 159 | ENDIF |
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| 160 | |
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| 161 | |
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| 162 | #else |
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| 163 | |
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| 164 | ! |
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| 165 | !-- Lateral boundary conditions in the non-parallel case |
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| 166 | IF ( bc_lr == 'cyclic' ) THEN |
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| 167 | ar(:,nys:nyn,nxl-1) = ar(:,nys:nyn,nxr) |
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| 168 | ar(:,nys:nyn,nxr+1) = ar(:,nys:nyn,nxl) |
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| 169 | ENDIF |
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| 170 | |
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| 171 | IF ( bc_ns == 'cyclic' ) THEN |
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| 172 | ar(:,nys-1,:) = ar(:,nyn,:) |
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| 173 | ar(:,nyn+1,:) = ar(:,nys,:) |
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| 174 | ENDIF |
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| 175 | |
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| 176 | #endif |
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| 177 | |
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| 178 | CALL cpu_log( log_point_s(2), 'exchange_horiz', 'stop' ) |
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| 179 | |
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| 180 | END SUBROUTINE exchange_horiz |
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