| 1 | !> @file exchange_horiz.f90 |
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| 2 | !------------------------------------------------------------------------------! |
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| 3 | ! This file is part of PALM. |
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| 4 | ! |
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| 5 | ! PALM is free software: you can redistribute it and/or modify it under the |
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| 6 | ! terms of the GNU General Public License as published by the Free Software |
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| 7 | ! Foundation, either version 3 of the License, or (at your option) any later |
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| 8 | ! version. |
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| 9 | ! |
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| 10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
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| 11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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| 12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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| 13 | ! |
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| 14 | ! You should have received a copy of the GNU General Public License along with |
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| 15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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| 16 | ! |
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| 17 | ! Copyright 1997-2016 Leibniz Universitaet Hannover |
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| 18 | !------------------------------------------------------------------------------! |
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| 19 | ! |
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| 20 | ! Current revisions: |
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| 21 | ! ----------------- |
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| 22 | ! |
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| 23 | ! |
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| 24 | ! Former revisions: |
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| 25 | ! ----------------- |
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| 26 | ! $Id: exchange_horiz.f90 2001 2016-08-20 18:41:22Z raasch $ |
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| 27 | ! |
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| 28 | ! 2000 2016-08-20 18:09:15Z knoop |
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| 29 | ! Forced header and separation lines into 80 columns |
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| 30 | ! |
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| 31 | ! 1804 2016-04-05 16:30:18Z maronga |
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| 32 | ! Removed code for parameter file check (__check) |
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| 33 | ! |
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| 34 | ! 1682 2015-10-07 23:56:08Z knoop |
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| 35 | ! Code annotations made doxygen readable |
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| 36 | ! |
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| 37 | ! 1677 2015-10-02 13:25:23Z boeske |
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| 38 | ! Added new routine for exchange of three-dimensional integer arrays |
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| 39 | ! |
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| 40 | ! 1569 2015-03-12 07:54:38Z raasch |
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| 41 | ! bugfix in background communication part |
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| 42 | ! |
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| 43 | ! 1348 2014-03-27 18:01:03Z raasch |
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| 44 | ! bugfix: on_device added to ONLY-list |
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| 45 | ! |
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| 46 | ! 1344 2014-03-26 17:33:09Z kanani |
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| 47 | ! Added missing parameters to ONLY-attribute |
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| 48 | ! |
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| 49 | ! 1320 2014-03-20 08:40:49Z raasch |
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| 50 | ! ONLY-attribute added to USE-statements, |
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| 51 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
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| 52 | ! kinds are defined in new module kinds, |
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| 53 | ! revision history before 2012 removed, |
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| 54 | ! comment fields (!:) to be used for variable explanations added to |
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| 55 | ! all variable declaration statements |
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| 56 | ! |
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| 57 | ! 1257 2013-11-08 15:18:40Z raasch |
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| 58 | ! openacc loop and loop vector clauses removed |
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| 59 | ! |
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| 60 | ! 1128 2013-04-12 06:19:32Z raasch |
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| 61 | ! modifications for asynchronous transfer, |
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| 62 | ! local variables req, wait_stat are global now, and have been moved to module |
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| 63 | ! pegrid |
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| 64 | ! |
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| 65 | ! 1113 2013-03-10 02:48:14Z raasch |
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| 66 | ! GPU-porting for single-core (1PE) mode |
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| 67 | ! |
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| 68 | ! 1036 2012-10-22 13:43:42Z raasch |
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| 69 | ! code put under GPL (PALM 3.9) |
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| 70 | ! |
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| 71 | ! 841 2012-02-28 12:29:49Z maronga |
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| 72 | ! Excluded routine from compilation of namelist_file_check |
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| 73 | ! |
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| 74 | ! Revision 1.1 1997/07/24 11:13:29 raasch |
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| 75 | ! Initial revision |
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| 76 | ! |
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| 77 | ! |
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| 78 | ! Description: |
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| 79 | ! ------------ |
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| 80 | !> Exchange of lateral boundary values (parallel computers) and cyclic |
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| 81 | !> lateral boundary conditions, respectively. |
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| 82 | !------------------------------------------------------------------------------! |
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| 83 | SUBROUTINE exchange_horiz( ar, nbgp_local) |
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| 84 | |
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| 85 | |
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| 86 | USE control_parameters, & |
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| 87 | ONLY: bc_lr, bc_lr_cyc, bc_ns, bc_ns_cyc, grid_level, & |
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| 88 | mg_switch_to_pe0, on_device, synchronous_exchange |
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| 89 | |
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| 90 | USE cpulog, & |
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| 91 | ONLY: cpu_log, log_point_s |
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| 92 | |
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| 93 | USE indices, & |
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| 94 | ONLY: nxl, nxr, nyn, nys, nzb, nzt |
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| 95 | |
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| 96 | USE kinds |
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| 97 | |
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| 98 | USE pegrid |
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| 99 | |
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| 100 | IMPLICIT NONE |
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| 101 | |
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| 102 | |
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| 103 | INTEGER(iwp) :: i !< |
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| 104 | INTEGER(iwp) :: j !< |
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| 105 | INTEGER(iwp) :: k !< |
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| 106 | INTEGER(iwp) :: nbgp_local !< |
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| 107 | |
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| 108 | REAL(wp), DIMENSION(nzb:nzt+1,nys-nbgp_local:nyn+nbgp_local, & |
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| 109 | nxl-nbgp_local:nxr+nbgp_local) :: ar !< |
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| 110 | |
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| 111 | |
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| 112 | CALL cpu_log( log_point_s(2), 'exchange_horiz', 'start' ) |
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| 113 | |
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| 114 | #if defined( __parallel ) |
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| 115 | |
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| 116 | ! |
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| 117 | !-- Exchange in x-direction of lateral boundaries |
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| 118 | IF ( pdims(1) == 1 .OR. mg_switch_to_pe0 ) THEN |
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| 119 | ! |
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| 120 | !-- One-dimensional decomposition along y, boundary values can be exchanged |
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| 121 | !-- within the PE memory |
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| 122 | IF ( bc_lr_cyc ) THEN |
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| 123 | ar(:,:,nxl-nbgp_local:nxl-1) = ar(:,:,nxr-nbgp_local+1:nxr) |
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| 124 | ar(:,:,nxr+1:nxr+nbgp_local) = ar(:,:,nxl:nxl+nbgp_local-1) |
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| 125 | ENDIF |
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| 126 | |
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| 127 | ELSE |
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| 128 | |
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| 129 | IF ( synchronous_exchange ) THEN |
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| 130 | ! |
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| 131 | !-- Send left boundary, receive right one (synchronous) |
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| 132 | CALL MPI_SENDRECV( & |
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| 133 | ar(nzb,nys-nbgp_local,nxl), 1, type_yz(grid_level), pleft, 0, & |
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| 134 | ar(nzb,nys-nbgp_local,nxr+1), 1, type_yz(grid_level), pright, 0, & |
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| 135 | comm2d, status, ierr ) |
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| 136 | ! |
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| 137 | !-- Send right boundary, receive left one (synchronous) |
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| 138 | CALL MPI_SENDRECV( ar(nzb,nys-nbgp_local,nxr+1-nbgp_local), 1, & |
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| 139 | type_yz(grid_level), pright, 1, & |
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| 140 | ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, & |
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| 141 | type_yz(grid_level), pleft, 1, & |
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| 142 | comm2d, status, ierr ) |
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| 143 | |
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| 144 | ELSE |
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| 145 | |
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| 146 | ! |
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| 147 | !-- In case of background communication switched on, exchange is done |
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| 148 | !-- either along x or along y |
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| 149 | IF ( send_receive == 'lr' .OR. send_receive == 'al' ) THEN |
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| 150 | |
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| 151 | IF ( .NOT. sendrecv_in_background ) THEN |
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| 152 | req(1:4) = 0 |
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| 153 | req_count = 0 |
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| 154 | ENDIF |
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| 155 | ! |
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| 156 | !-- Send left boundary, receive right one (asynchronous) |
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| 157 | CALL MPI_ISEND( ar(nzb,nys-nbgp_local,nxl), 1, type_yz(grid_level), & |
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| 158 | pleft, req_count, comm2d, req(req_count+1), ierr ) |
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| 159 | CALL MPI_IRECV( ar(nzb,nys-nbgp_local,nxr+1), 1, type_yz(grid_level), & |
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| 160 | pright, req_count, comm2d, req(req_count+2), ierr ) |
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| 161 | ! |
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| 162 | !-- Send right boundary, receive left one (asynchronous) |
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| 163 | CALL MPI_ISEND( ar(nzb,nys-nbgp_local,nxr+1-nbgp_local), 1, & |
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| 164 | type_yz(grid_level), pright, req_count+1, comm2d, & |
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| 165 | req(req_count+3), ierr ) |
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| 166 | CALL MPI_IRECV( ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, & |
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| 167 | type_yz(grid_level), pleft, req_count+1, comm2d, & |
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| 168 | req(req_count+4), ierr ) |
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| 169 | |
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| 170 | IF ( .NOT. sendrecv_in_background ) THEN |
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| 171 | CALL MPI_WAITALL( 4, req, wait_stat, ierr ) |
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| 172 | ELSE |
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| 173 | req_count = req_count + 4 |
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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 | ENDIF |
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| 179 | |
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| 180 | ENDIF |
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| 181 | |
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| 182 | |
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| 183 | IF ( pdims(2) == 1 .OR. mg_switch_to_pe0 ) THEN |
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| 184 | ! |
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| 185 | !-- One-dimensional decomposition along x, boundary values can be exchanged |
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| 186 | !-- within the PE memory |
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| 187 | IF ( bc_ns_cyc ) THEN |
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| 188 | ar(:,nys-nbgp_local:nys-1,:) = ar(:,nyn-nbgp_local+1:nyn,:) |
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| 189 | ar(:,nyn+1:nyn+nbgp_local,:) = ar(:,nys:nys+nbgp_local-1,:) |
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| 190 | ENDIF |
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| 191 | |
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| 192 | ELSE |
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| 193 | |
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| 194 | IF ( synchronous_exchange ) THEN |
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| 195 | ! |
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| 196 | !-- Send front boundary, receive rear one (synchronous) |
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| 197 | CALL MPI_SENDRECV( & |
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| 198 | ar(nzb,nys,nxl-nbgp_local), 1, type_xz(grid_level), psouth, 0, & |
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| 199 | ar(nzb,nyn+1,nxl-nbgp_local), 1, type_xz(grid_level), pnorth, 0, & |
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| 200 | comm2d, status, ierr ) |
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| 201 | ! |
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| 202 | !-- Send rear boundary, receive front one (synchronous) |
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| 203 | CALL MPI_SENDRECV( ar(nzb,nyn-nbgp_local+1,nxl-nbgp_local), 1, & |
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| 204 | type_xz(grid_level), pnorth, 1, & |
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| 205 | ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, & |
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| 206 | type_xz(grid_level), psouth, 1, & |
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| 207 | comm2d, status, ierr ) |
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| 208 | |
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| 209 | ELSE |
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| 210 | |
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| 211 | ! |
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| 212 | !-- In case of background communication switched on, exchange is done |
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| 213 | !-- either along x or along y |
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| 214 | IF ( send_receive == 'ns' .OR. send_receive == 'al' ) THEN |
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| 215 | |
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| 216 | IF ( .NOT. sendrecv_in_background ) THEN |
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| 217 | req(1:4) = 0 |
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| 218 | req_count = 0 |
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| 219 | ENDIF |
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| 220 | |
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| 221 | ! |
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| 222 | !-- Send front boundary, receive rear one (asynchronous) |
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| 223 | CALL MPI_ISEND( ar(nzb,nys,nxl-nbgp_local), 1, type_xz(grid_level), & |
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| 224 | psouth, req_count, comm2d, req(req_count+1), ierr ) |
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| 225 | CALL MPI_IRECV( ar(nzb,nyn+1,nxl-nbgp_local), 1, type_xz(grid_level), & |
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| 226 | pnorth, req_count, comm2d, req(req_count+2), ierr ) |
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| 227 | ! |
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| 228 | !-- Send rear boundary, receive front one (asynchronous) |
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| 229 | CALL MPI_ISEND( ar(nzb,nyn-nbgp_local+1,nxl-nbgp_local), 1, & |
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| 230 | type_xz(grid_level), pnorth, req_count+1, comm2d, & |
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| 231 | req(req_count+3), ierr ) |
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| 232 | CALL MPI_IRECV( ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, & |
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| 233 | type_xz(grid_level), psouth, req_count+1, comm2d, & |
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| 234 | req(req_count+4), ierr ) |
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| 235 | |
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| 236 | IF ( .NOT. sendrecv_in_background ) THEN |
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| 237 | CALL MPI_WAITALL( 4, req, wait_stat, ierr ) |
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| 238 | ELSE |
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| 239 | req_count = req_count + 4 |
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| 240 | ENDIF |
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| 241 | |
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| 242 | ENDIF |
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| 243 | |
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| 244 | ENDIF |
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| 245 | |
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| 246 | ENDIF |
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| 247 | |
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| 248 | #else |
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| 249 | |
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| 250 | ! |
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| 251 | !-- Lateral boundary conditions in the non-parallel case. |
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| 252 | !-- Case dependent, because in GPU mode still not all arrays are on device. This |
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| 253 | !-- workaround has to be removed later. Also, since PGI compiler 12.5 has problems |
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| 254 | !-- with array syntax, explicit loops are used. |
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| 255 | IF ( bc_lr == 'cyclic' ) THEN |
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| 256 | IF ( on_device ) THEN |
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| 257 | !$acc kernels present( ar ) |
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| 258 | !$acc loop independent |
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| 259 | DO i = 0, nbgp_local-1 |
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| 260 | DO j = nys-nbgp_local, nyn+nbgp_local |
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| 261 | DO k = nzb, nzt+1 |
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| 262 | ar(k,j,nxl-nbgp_local+i) = ar(k,j,nxr-nbgp_local+1+i) |
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| 263 | ar(k,j,nxr+1+i) = ar(k,j,nxl+i) |
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| 264 | ENDDO |
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| 265 | ENDDO |
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| 266 | ENDDO |
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| 267 | !$acc end kernels |
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| 268 | ELSE |
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| 269 | ar(:,:,nxl-nbgp_local:nxl-1) = ar(:,:,nxr-nbgp_local+1:nxr) |
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| 270 | ar(:,:,nxr+1:nxr+nbgp_local) = ar(:,:,nxl:nxl+nbgp_local-1) |
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| 271 | ENDIF |
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| 272 | ENDIF |
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| 273 | |
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| 274 | IF ( bc_ns == 'cyclic' ) THEN |
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| 275 | IF ( on_device ) THEN |
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| 276 | !$acc kernels present( ar ) |
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| 277 | DO i = nxl-nbgp_local, nxr+nbgp_local |
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| 278 | !$acc loop independent |
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| 279 | DO j = 0, nbgp_local-1 |
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| 280 | !$acc loop independent |
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| 281 | DO k = nzb, nzt+1 |
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| 282 | ar(k,nys-nbgp_local+j,i) = ar(k,nyn-nbgp_local+1+j,i) |
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| 283 | ar(k,nyn+1+j,i) = ar(k,nys+j,i) |
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| 284 | ENDDO |
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| 285 | ENDDO |
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| 286 | ENDDO |
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| 287 | !$acc end kernels |
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| 288 | ELSE |
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| 289 | ar(:,nys-nbgp_local:nys-1,:) = ar(:,nyn-nbgp_local+1:nyn,:) |
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| 290 | ar(:,nyn+1:nyn+nbgp_local,:) = ar(:,nys:nys+nbgp_local-1,:) |
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| 291 | ENDIF |
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| 292 | ENDIF |
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| 293 | |
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| 294 | #endif |
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| 295 | CALL cpu_log( log_point_s(2), 'exchange_horiz', 'stop' ) |
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| 296 | |
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| 297 | END SUBROUTINE exchange_horiz |
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| 298 | |
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| 299 | |
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| 300 | !------------------------------------------------------------------------------! |
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| 301 | ! Description: |
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| 302 | ! ------------ |
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| 303 | !> @todo Missing subroutine description. |
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| 304 | !------------------------------------------------------------------------------! |
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| 305 | SUBROUTINE exchange_horiz_int( ar, nbgp_local) |
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| 306 | |
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| 307 | USE control_parameters, & |
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| 308 | ONLY: bc_lr, bc_lr_cyc, bc_ns, bc_ns_cyc |
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| 309 | |
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| 310 | USE indices, & |
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| 311 | ONLY: nxl, nxr, nyn, nys, nzb, nzt |
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| 312 | |
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| 313 | USE kinds |
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| 314 | |
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| 315 | USE pegrid |
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| 316 | |
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| 317 | IMPLICIT NONE |
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| 318 | |
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| 319 | |
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| 320 | INTEGER(iwp) :: nbgp_local !< number of ghost points |
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| 321 | |
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| 322 | INTEGER(iwp), DIMENSION(nzb:nzt+1,nys-nbgp_local:nyn+nbgp_local, & |
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| 323 | nxl-nbgp_local:nxr+nbgp_local) :: ar !< treated array |
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| 324 | |
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| 325 | |
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| 326 | #if defined( __parallel ) |
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| 327 | IF ( pdims(1) == 1 ) THEN |
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| 328 | ! |
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| 329 | !-- One-dimensional decomposition along y, boundary values can be exchanged |
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| 330 | !-- within the PE memory |
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| 331 | IF ( bc_lr_cyc ) THEN |
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| 332 | ar(:,:,nxl-nbgp_local:nxl-1) = ar(:,:,nxr-nbgp_local+1:nxr) |
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| 333 | ar(:,:,nxr+1:nxr+nbgp_local) = ar(:,:,nxl:nxl+nbgp_local-1) |
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| 334 | ENDIF |
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| 335 | ELSE |
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| 336 | ! |
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| 337 | !-- Send left boundary, receive right one (synchronous) |
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| 338 | CALL MPI_SENDRECV( & |
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| 339 | ar(nzb,nys-nbgp_local,nxl), 1, type_yz_int, pleft, 0, & |
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| 340 | ar(nzb,nys-nbgp_local,nxr+1), 1, type_yz_int, pright, 0, & |
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| 341 | comm2d, status, ierr ) |
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| 342 | ! |
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| 343 | !-- Send right boundary, receive left one (synchronous) |
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| 344 | CALL MPI_SENDRECV( & |
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| 345 | ar(nzb,nys-nbgp_local,nxr+1-nbgp_local), 1, type_yz_int, pright, 1, & |
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| 346 | ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, type_yz_int, pleft, 1, & |
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| 347 | comm2d, status, ierr ) |
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| 348 | ENDIF |
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| 349 | |
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| 350 | |
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| 351 | IF ( pdims(2) == 1 ) THEN |
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| 352 | ! |
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| 353 | !-- One-dimensional decomposition along x, boundary values can be exchanged |
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| 354 | !-- within the PE memory |
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| 355 | IF ( bc_ns_cyc ) THEN |
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| 356 | ar(:,nys-nbgp_local:nys-1,:) = ar(:,nyn-nbgp_local+1:nyn,:) |
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| 357 | ar(:,nyn+1:nyn+nbgp_local,:) = ar(:,nys:nys+nbgp_local-1,:) |
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| 358 | ENDIF |
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| 359 | |
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| 360 | ELSE |
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| 361 | |
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| 362 | ! |
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| 363 | !-- Send front boundary, receive rear one (synchronous) |
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| 364 | CALL MPI_SENDRECV( & |
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| 365 | ar(nzb,nys,nxl-nbgp_local), 1, type_xz_int, psouth, 0, & |
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| 366 | ar(nzb,nyn+1,nxl-nbgp_local), 1, type_xz_int, pnorth, 0, & |
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| 367 | comm2d, status, ierr ) |
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| 368 | ! |
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| 369 | !-- Send rear boundary, receive front one (synchronous) |
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| 370 | CALL MPI_SENDRECV( ar(nzb,nyn-nbgp_local+1,nxl-nbgp_local), 1, & |
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| 371 | type_xz_int, pnorth, 1, & |
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| 372 | ar(nzb,nys-nbgp_local,nxl-nbgp_local), 1, & |
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| 373 | type_xz_int, psouth, 1, & |
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| 374 | comm2d, status, ierr ) |
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| 375 | |
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| 376 | ENDIF |
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| 377 | |
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| 378 | #else |
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| 379 | |
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| 380 | IF ( bc_lr == 'cyclic' ) THEN |
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| 381 | ar(:,:,nxl-nbgp_local:nxl-1) = ar(:,:,nxr-nbgp_local+1:nxr) |
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| 382 | ar(:,:,nxr+1:nxr+nbgp_local) = ar(:,:,nxl:nxl+nbgp_local-1) |
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| 383 | ENDIF |
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| 384 | |
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| 385 | IF ( bc_ns == 'cyclic' ) THEN |
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| 386 | ar(:,nys-nbgp_local:nys-1,:) = ar(:,nyn-nbgp_local+1:nyn,:) |
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| 387 | ar(:,nyn+1:nyn+nbgp_local,:) = ar(:,nys:nys+nbgp_local-1,:) |
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| 388 | ENDIF |
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| 389 | |
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| 390 | #endif |
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| 391 | |
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| 392 | |
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| 393 | END SUBROUTINE exchange_horiz_int |
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