| 1 | !> @file poismg.f90 |
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| 2 | !------------------------------------------------------------------------------! |
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| 3 | ! This file is part of the PALM model system. |
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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 1997-2018 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: poismg_mod.f90 2718 2018-01-02 08:49:38Z kanani $ |
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| 27 | ! Corrected "Former revisions" section |
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| 28 | ! |
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| 29 | ! 2696 2017-12-14 17:12:51Z kanani |
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| 30 | ! Change in file header (GPL part) |
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| 31 | ! Large-scale forcing implemented (MS) |
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| 32 | ! |
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| 33 | ! 2298 2017-06-29 09:28:18Z raasch |
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| 34 | ! sendrecv_in_background related parts removed |
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| 35 | ! |
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| 36 | ! 2232 2017-05-30 17:47:52Z suehring |
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| 37 | ! |
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| 38 | ! 2073 2016-11-30 14:34:05Z raasch |
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| 39 | ! change of openmp directives in restrict |
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| 40 | ! |
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| 41 | ! 2037 2016-10-26 11:15:40Z knoop |
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| 42 | ! Anelastic approximation implemented (stll error in optimized multigrid) |
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| 43 | ! |
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| 44 | ! 2021 2016-10-07 14:08:57Z suehring |
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| 45 | ! Bugfix: restore nest_bound_(l/r/s/n) in case of mg_switch_to_pe0 |
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| 46 | ! |
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| 47 | ! 2000 2016-08-20 18:09:15Z knoop |
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| 48 | ! Forced header and separation lines into 80 columns |
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| 49 | ! |
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| 50 | ! 1934 2016-06-13 09:46:57Z hellstea |
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| 51 | ! Rename subroutines and cpu-measure log points to indicate default version |
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| 52 | ! |
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| 53 | ! 1904 2016-05-11 13:06:12Z suehring |
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| 54 | ! Bugfix: enable special_exchange_horiz only for finer grid levels. |
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| 55 | ! Some formatting adjustments and variable descriptions. |
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| 56 | ! |
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| 57 | ! 1898 2016-05-03 11:27:17Z suehring |
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| 58 | ! Bugfix: bottom and top boundary condition in resid_fast |
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| 59 | ! Bugfix: restriction at nzb+1 |
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| 60 | ! formatting adjustments, variable descriptions added in some declaration blocks |
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| 61 | ! |
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| 62 | ! 1850 2016-04-08 13:29:27Z maronga |
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| 63 | ! Module renamed |
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| 64 | ! |
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| 65 | ! |
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| 66 | ! 1762 2016-02-25 12:31:13Z hellstea |
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| 67 | ! Introduction of nested domain feature |
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| 68 | ! |
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| 69 | ! 1682 2015-10-07 23:56:08Z knoop |
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| 70 | ! Code annotations made doxygen readable |
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| 71 | ! |
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| 72 | ! 1609 2015-07-03 15:37:58Z maronga |
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| 73 | ! Bugfix: allow compilation without __parallel. |
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| 74 | ! |
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| 75 | ! 1575 2015-03-27 09:56:27Z raasch |
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| 76 | ! Initial revision. |
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| 77 | ! Routine re-written and optimised based on poismg. |
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| 78 | ! |
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| 79 | ! Following optimisations have been made: |
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| 80 | ! - vectorisation (for Intel-CPUs) of the red-black algorithm by resorting |
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| 81 | ! array elements with even and odd indices |
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| 82 | ! - explicit boundary conditions for building walls removed (solver is |
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| 83 | ! running through the buildings |
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| 84 | ! - reduced data transfer in case of ghost point exchange, because only |
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| 85 | ! "red" or "black" data points need to be exchanged. This is not applied |
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| 86 | ! for coarser grid levels, since for then the transfer time is latency bound |
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| 87 | ! |
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| 88 | ! |
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| 89 | ! Description: |
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| 90 | ! ------------ |
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| 91 | !> Solves the Poisson equation for the perturbation pressure with a multigrid |
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| 92 | !> V- or W-Cycle scheme. |
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| 93 | !> |
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| 94 | !> This multigrid method was originally developed for PALM by Joerg Uhlenbrock, |
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| 95 | !> September 2000 - July 2001. It has been optimised for speed by Klaus |
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| 96 | !> Ketelsen in November 2014. |
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| 97 | !> |
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| 98 | !> @attention Loop unrolling and cache optimization in SOR-Red/Black method |
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| 99 | !> still does not give the expected speedup! |
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| 100 | !> |
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| 101 | !> @todo Further work required. |
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| 102 | !------------------------------------------------------------------------------! |
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| 103 | MODULE poismg_mod |
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| 104 | |
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| 105 | USE control_parameters, & |
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| 106 | ONLY: grid_level, force_bound_l, force_bound_n, force_bound_r, & |
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| 107 | force_bound_s, forcing, inflow_l, inflow_n, inflow_r, inflow_s, & |
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| 108 | nest_bound_l, nest_bound_n, nest_bound_r, nest_bound_s, & |
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| 109 | outflow_l, outflow_n, outflow_r, outflow_s |
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| 110 | |
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| 111 | USE cpulog, & |
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| 112 | ONLY: cpu_log, log_point_s |
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| 113 | |
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| 114 | USE kinds |
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| 115 | |
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| 116 | USE pegrid |
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| 117 | |
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| 118 | PRIVATE |
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| 119 | |
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| 120 | INTEGER, SAVE :: ind_even_odd !< border index between even and odd k index |
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| 121 | INTEGER, DIMENSION(:), SAVE, ALLOCATABLE :: even_odd_level !< stores ind_even_odd for all MG levels |
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| 122 | |
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| 123 | REAL(wp), DIMENSION(:,:), SAVE, ALLOCATABLE :: f1_mg_b, f2_mg_b, f3_mg_b !< blocked version of f1_mg ... |
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| 124 | |
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| 125 | INTERFACE poismg |
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| 126 | MODULE PROCEDURE poismg |
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| 127 | END INTERFACE poismg |
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| 128 | |
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| 129 | INTERFACE sort_k_to_even_odd_blocks |
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| 130 | MODULE PROCEDURE sort_k_to_even_odd_blocks |
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| 131 | MODULE PROCEDURE sort_k_to_even_odd_blocks_int |
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| 132 | MODULE PROCEDURE sort_k_to_even_odd_blocks_1d |
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| 133 | END INTERFACE sort_k_to_even_odd_blocks |
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| 134 | |
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| 135 | PUBLIC poismg |
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| 136 | |
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| 137 | CONTAINS |
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| 138 | |
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| 139 | !------------------------------------------------------------------------------! |
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| 140 | ! Description: |
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| 141 | ! ------------ |
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| 142 | !> Solves the Poisson equation for the perturbation pressure with a multigrid |
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| 143 | !> V- or W-Cycle scheme. |
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| 144 | !------------------------------------------------------------------------------! |
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| 145 | SUBROUTINE poismg( r ) |
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| 146 | |
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| 147 | USE arrays_3d, & |
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| 148 | ONLY: d, p_loc |
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| 149 | |
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| 150 | USE control_parameters, & |
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| 151 | ONLY: gathered_size, grid_level, grid_level_count, & |
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| 152 | maximum_grid_level, message_string, mgcycles, mg_cycles, & |
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| 153 | mg_switch_to_pe0_level, residual_limit, subdomain_size |
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| 154 | |
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| 155 | USE cpulog, & |
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| 156 | ONLY: cpu_log, log_point_s |
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| 157 | |
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| 158 | USE indices, & |
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| 159 | ONLY: nxl, nxlg, nxl_mg, nxr, nxrg, nxr_mg, nys, nysg, nys_mg, nyn,& |
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| 160 | nyng, nyn_mg, nzb, nzt, nzt_mg |
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| 161 | |
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| 162 | IMPLICIT NONE |
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| 163 | |
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| 164 | REAL(wp) :: maxerror !< |
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| 165 | REAL(wp) :: maximum_mgcycles !< |
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| 166 | REAL(wp) :: residual_norm !< |
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| 167 | |
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| 168 | REAL(wp), DIMENSION(nzb:nzt+1,nys-1:nyn+1,nxl-1:nxr+1) :: r !< |
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| 169 | |
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| 170 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: p3 !< |
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| 171 | |
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| 172 | |
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| 173 | CALL cpu_log( log_point_s(29), 'poismg', 'start' ) |
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| 174 | ! |
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| 175 | !-- Initialize arrays and variables used in this subroutine |
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| 176 | |
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| 177 | !-- If the number of grid points of the gathered grid, which is collected |
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| 178 | !-- on PE0, is larger than the number of grid points of an PE, than array |
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| 179 | !-- p3 will be enlarged. |
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| 180 | IF ( gathered_size > subdomain_size ) THEN |
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| 181 | ALLOCATE( p3(nzb:nzt_mg(mg_switch_to_pe0_level)+1,nys_mg( & |
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| 182 | mg_switch_to_pe0_level)-1:nyn_mg(mg_switch_to_pe0_level)+1,& |
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| 183 | nxl_mg(mg_switch_to_pe0_level)-1:nxr_mg( & |
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| 184 | mg_switch_to_pe0_level)+1) ) |
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| 185 | ELSE |
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| 186 | ALLOCATE ( p3(nzb:nzt+1,nysg:nyng,nxlg:nxrg) ) |
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| 187 | ENDIF |
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| 188 | |
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| 189 | p3 = 0.0_wp |
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| 190 | |
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| 191 | |
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| 192 | ! |
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| 193 | !-- Ghost boundaries have to be added to divergence array. |
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| 194 | !-- Exchange routine needs to know the grid level! |
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| 195 | grid_level = maximum_grid_level |
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| 196 | CALL exchange_horiz( d, 1) |
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| 197 | d(nzb,:,:) = d(nzb+1,:,:) |
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| 198 | |
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| 199 | ! |
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| 200 | !-- Initiation of the multigrid scheme. Does n cycles until the |
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| 201 | !-- residual is smaller than the given limit. The accuracy of the solution |
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| 202 | !-- of the poisson equation will increase with the number of cycles. |
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| 203 | !-- If the number of cycles is preset by the user, this number will be |
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| 204 | !-- carried out regardless of the accuracy. |
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| 205 | grid_level_count = 0 |
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| 206 | mgcycles = 0 |
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| 207 | IF ( mg_cycles == -1 ) THEN |
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| 208 | maximum_mgcycles = 0 |
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| 209 | residual_norm = 1.0_wp |
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| 210 | ELSE |
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| 211 | maximum_mgcycles = mg_cycles |
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| 212 | residual_norm = 0.0_wp |
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| 213 | ENDIF |
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| 214 | |
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| 215 | ! |
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| 216 | !-- Initial settings for sorting k-dimension from sequential order (alternate |
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| 217 | !-- even/odd) into blocks of even and odd or vice versa |
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| 218 | CALL init_even_odd_blocks |
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| 219 | |
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| 220 | ! |
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| 221 | !-- Sort input arrays in even/odd blocks along k-dimension |
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| 222 | CALL sort_k_to_even_odd_blocks( d, grid_level ) |
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| 223 | CALL sort_k_to_even_odd_blocks( p_loc, grid_level ) |
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| 224 | |
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| 225 | ! |
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| 226 | !-- The complete multigrid cycles are running in block mode, i.e. over |
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| 227 | !-- seperate data blocks of even and odd indices |
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| 228 | DO WHILE ( residual_norm > residual_limit .OR. & |
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| 229 | mgcycles < maximum_mgcycles ) |
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| 230 | |
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| 231 | CALL next_mg_level( d, p_loc, p3, r) |
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| 232 | |
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| 233 | ! |
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| 234 | !-- Calculate the residual if the user has not preset the number of |
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| 235 | !-- cycles to be performed |
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| 236 | IF ( maximum_mgcycles == 0 ) THEN |
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| 237 | CALL resid( d, p_loc, r ) |
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| 238 | maxerror = SUM( r(nzb+1:nzt,nys:nyn,nxl:nxr)**2 ) |
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| 239 | |
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| 240 | #if defined( __parallel ) |
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| 241 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
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| 242 | CALL MPI_ALLREDUCE( maxerror, residual_norm, 1, MPI_REAL, & |
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| 243 | MPI_SUM, comm2d, ierr) |
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| 244 | #else |
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| 245 | residual_norm = maxerror |
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| 246 | #endif |
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| 247 | residual_norm = SQRT( residual_norm ) |
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| 248 | ENDIF |
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| 249 | |
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| 250 | mgcycles = mgcycles + 1 |
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| 251 | |
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| 252 | ! |
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| 253 | !-- If the user has not limited the number of cycles, stop the run in case |
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| 254 | !-- of insufficient convergence |
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| 255 | IF ( mgcycles > 1000 .AND. mg_cycles == -1 ) THEN |
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| 256 | message_string = 'no sufficient convergence within 1000 cycles' |
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| 257 | CALL message( 'poismg', 'PA0283', 1, 2, 0, 6, 0 ) |
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| 258 | ENDIF |
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| 259 | |
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| 260 | ENDDO |
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| 261 | |
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| 262 | DEALLOCATE( p3 ) |
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| 263 | ! |
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| 264 | !-- Result has to be sorted back from even/odd blocks to sequential order |
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| 265 | CALL sort_k_to_sequential( p_loc ) |
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| 266 | ! |
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| 267 | !-- Unset the grid level. Variable is used to determine the MPI datatypes for |
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| 268 | !-- ghost point exchange |
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| 269 | grid_level = 0 |
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| 270 | |
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| 271 | CALL cpu_log( log_point_s(29), 'poismg', 'stop' ) |
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| 272 | |
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| 273 | END SUBROUTINE poismg |
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| 274 | |
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| 275 | |
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| 276 | !------------------------------------------------------------------------------! |
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| 277 | ! Description: |
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| 278 | ! ------------ |
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| 279 | !> Computes the residual of the perturbation pressure. |
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| 280 | !------------------------------------------------------------------------------! |
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| 281 | SUBROUTINE resid( f_mg, p_mg, r ) |
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| 282 | |
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| 283 | |
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| 284 | USE arrays_3d, & |
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| 285 | ONLY: f1_mg, f2_mg, f3_mg, rho_air_mg |
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| 286 | |
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| 287 | USE control_parameters, & |
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| 288 | ONLY: bc_lr_cyc, bc_ns_cyc, ibc_p_b, ibc_p_t |
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| 289 | USE grid_variables, & |
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| 290 | ONLY: ddx2_mg, ddy2_mg |
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| 291 | |
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| 292 | USE indices, & |
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| 293 | ONLY: nxl_mg, nxr_mg, nys_mg, nyn_mg, nzb, nzt_mg |
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| 294 | |
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| 295 | IMPLICIT NONE |
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| 296 | |
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| 297 | INTEGER(iwp) :: i !< index variable along x |
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| 298 | INTEGER(iwp) :: j !< index variable along y |
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| 299 | INTEGER(iwp) :: k !< index variable along z |
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| 300 | INTEGER(iwp) :: l !< index indicating grid level |
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| 301 | INTEGER(iwp) :: km1 !< index variable along z dimension (k-1) |
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| 302 | INTEGER(iwp) :: kp1 !< index variable along z dimension (k+1) |
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| 303 | |
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| 304 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
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| 305 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
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| 306 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: f_mg !< velocity divergence |
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| 307 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
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| 308 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
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| 309 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: p_mg !< perturbation pressure |
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| 310 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
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| 311 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
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| 312 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: r !< residuum of perturbation pressure |
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| 313 | |
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| 314 | ! |
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| 315 | !-- Calculate the residual |
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| 316 | l = grid_level |
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| 317 | |
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| 318 | CALL cpu_log( log_point_s(53), 'resid', 'start' ) |
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| 319 | !$OMP PARALLEL PRIVATE (i,j,k,km1,kp1) |
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| 320 | !$OMP DO |
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| 321 | DO i = nxl_mg(l), nxr_mg(l) |
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| 322 | DO j = nys_mg(l), nyn_mg(l) |
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| 323 | !DIR$ IVDEP |
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| 324 | DO k = ind_even_odd+1, nzt_mg(l) |
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| 325 | km1 = k-ind_even_odd-1 |
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| 326 | kp1 = k-ind_even_odd |
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| 327 | r(k,j,i) = f_mg(k,j,i) & |
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| 328 | - rho_air_mg(k,l) * ddx2_mg(l) * & |
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| 329 | ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
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| 330 | - rho_air_mg(k,l) * ddy2_mg(l) * & |
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| 331 | ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
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| 332 | - f2_mg_b(k,l) * p_mg(kp1,j,i) & |
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| 333 | - f3_mg_b(k,l) * p_mg(km1,j,i) & |
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| 334 | + f1_mg_b(k,l) * p_mg(k,j,i) |
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| 335 | ENDDO |
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| 336 | !DIR$ IVDEP |
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| 337 | DO k = nzb+1, ind_even_odd |
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| 338 | km1 = k+ind_even_odd |
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| 339 | kp1 = k+ind_even_odd+1 |
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| 340 | r(k,j,i) = f_mg(k,j,i) & |
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| 341 | - rho_air_mg(k,l) * ddx2_mg(l) * & |
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| 342 | ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
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| 343 | - rho_air_mg(k,l) * ddy2_mg(l) * & |
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| 344 | ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
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| 345 | - f2_mg_b(k,l) * p_mg(kp1,j,i) & |
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| 346 | - f3_mg_b(k,l) * p_mg(km1,j,i) & |
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| 347 | + f1_mg_b(k,l) * p_mg(k,j,i) |
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| 348 | ENDDO |
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| 349 | ENDDO |
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| 350 | ENDDO |
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| 351 | !$OMP END PARALLEL |
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| 352 | ! |
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| 353 | !-- Horizontal boundary conditions |
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| 354 | CALL exchange_horiz( r, 1) |
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| 355 | |
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| 356 | IF ( .NOT. bc_lr_cyc ) THEN |
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| 357 | IF ( inflow_l .OR. outflow_l .OR. nest_bound_l .OR. & |
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| 358 | force_bound_l ) THEN |
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| 359 | r(:,:,nxl_mg(l)-1) = r(:,:,nxl_mg(l)) |
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| 360 | ENDIF |
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| 361 | IF ( inflow_r .OR. outflow_r .OR. nest_bound_r .OR. & |
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| 362 | force_bound_r ) THEN |
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| 363 | r(:,:,nxr_mg(l)+1) = r(:,:,nxr_mg(l)) |
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| 364 | ENDIF |
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| 365 | ENDIF |
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| 366 | |
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| 367 | IF ( .NOT. bc_ns_cyc ) THEN |
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| 368 | IF ( inflow_n .OR. outflow_n .OR. nest_bound_n .OR. & |
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| 369 | force_bound_n ) THEN |
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| 370 | r(:,nyn_mg(l)+1,:) = r(:,nyn_mg(l),:) |
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| 371 | ENDIF |
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| 372 | IF ( inflow_s .OR. outflow_s .OR. nest_bound_s .OR. & |
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| 373 | force_bound_s ) THEN |
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| 374 | r(:,nys_mg(l)-1,:) = r(:,nys_mg(l),:) |
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| 375 | ENDIF |
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| 376 | ENDIF |
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| 377 | |
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| 378 | ! |
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| 379 | !-- Boundary conditions at bottom and top of the domain. Points may be within |
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| 380 | !-- buildings, but that doesn't matter. |
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| 381 | IF ( ibc_p_b == 1 ) THEN |
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| 382 | ! |
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| 383 | !-- equivalent to r(nzb,:,: ) = r(nzb+1,:,:) |
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| 384 | r(nzb,:,: ) = r(ind_even_odd+1,:,:) |
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| 385 | ELSE |
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| 386 | r(nzb,:,: ) = 0.0_wp |
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| 387 | ENDIF |
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| 388 | |
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| 389 | IF ( ibc_p_t == 1 ) THEN |
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| 390 | ! |
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| 391 | !-- equivalent to r(nzt_mg(l)+1,:,: ) = r(nzt_mg(l),:,:) |
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| 392 | r(nzt_mg(l)+1,:,: ) = r(ind_even_odd,:,:) |
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| 393 | ELSE |
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| 394 | r(nzt_mg(l)+1,:,: ) = 0.0_wp |
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| 395 | ENDIF |
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| 396 | |
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| 397 | CALL cpu_log( log_point_s(53), 'resid', 'stop' ) |
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| 398 | |
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| 399 | END SUBROUTINE resid |
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| 400 | |
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| 401 | |
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| 402 | !------------------------------------------------------------------------------! |
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| 403 | ! Description: |
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| 404 | ! ------------ |
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| 405 | !> Interpolates the residual on the next coarser grid with "full weighting" |
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| 406 | !> scheme |
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| 407 | !------------------------------------------------------------------------------! |
|---|
| 408 | SUBROUTINE restrict( f_mg, r ) |
|---|
| 409 | |
|---|
| 410 | |
|---|
| 411 | USE control_parameters, & |
|---|
| 412 | ONLY: bc_lr_cyc, bc_ns_cyc, ibc_p_b, ibc_p_t |
|---|
| 413 | |
|---|
| 414 | USE indices, & |
|---|
| 415 | ONLY: nxl_mg, nxr_mg, nys_mg, nyn_mg, nzb, nzt_mg |
|---|
| 416 | |
|---|
| 417 | IMPLICIT NONE |
|---|
| 418 | |
|---|
| 419 | INTEGER(iwp) :: i !< index variable along x on finer grid |
|---|
| 420 | INTEGER(iwp) :: ic !< index variable along x on coarser grid |
|---|
| 421 | INTEGER(iwp) :: j !< index variable along y on finer grid |
|---|
| 422 | INTEGER(iwp) :: jc !< index variable along y on coarser grid |
|---|
| 423 | INTEGER(iwp) :: k !< index variable along z on finer grid |
|---|
| 424 | INTEGER(iwp) :: kc !< index variable along z on coarser grid |
|---|
| 425 | INTEGER(iwp) :: l !< index indicating finer grid level |
|---|
| 426 | INTEGER(iwp) :: km1 !< index variable along z dimension (k-1 on finer level) |
|---|
| 427 | INTEGER(iwp) :: kp1 !< index variable along z dimension (k+1 on finer level) |
|---|
| 428 | |
|---|
| 429 | |
|---|
| 430 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
|---|
| 431 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
|---|
| 432 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: & |
|---|
| 433 | f_mg !< Residual on coarser grid level |
|---|
| 434 | |
|---|
| 435 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level+1)+1, & |
|---|
| 436 | nys_mg(grid_level+1)-1:nyn_mg(grid_level+1)+1, & |
|---|
| 437 | nxl_mg(grid_level+1)-1:nxr_mg(grid_level+1)+1) :: & |
|---|
| 438 | r !< Residual on finer grid level |
|---|
| 439 | |
|---|
| 440 | ! |
|---|
| 441 | !-- Interpolate the residual |
|---|
| 442 | l = grid_level |
|---|
| 443 | |
|---|
| 444 | CALL cpu_log( log_point_s(54), 'restrict', 'start' ) |
|---|
| 445 | ! |
|---|
| 446 | !-- No wall treatment |
|---|
| 447 | !$OMP PARALLEL PRIVATE (i,j,k,ic,jc,kc,km1,kp1) |
|---|
| 448 | !$OMP DO SCHEDULE( STATIC ) |
|---|
| 449 | DO ic = nxl_mg(l), nxr_mg(l) |
|---|
| 450 | i = 2*ic |
|---|
| 451 | DO jc = nys_mg(l), nyn_mg(l) |
|---|
| 452 | ! |
|---|
| 453 | !-- Calculation for the first point along k |
|---|
| 454 | j = 2*jc |
|---|
| 455 | ! |
|---|
| 456 | !-- Calculation for the other points along k |
|---|
| 457 | !DIR$ IVDEP |
|---|
| 458 | DO k = ind_even_odd+1, nzt_mg(l+1) ! Fine grid at this point |
|---|
| 459 | km1 = k-ind_even_odd-1 |
|---|
| 460 | kp1 = k-ind_even_odd |
|---|
| 461 | kc = k-ind_even_odd ! Coarse grid index |
|---|
| 462 | |
|---|
| 463 | f_mg(kc,jc,ic) = 1.0_wp / 64.0_wp * ( & |
|---|
| 464 | 8.0_wp * r(k,j,i) & |
|---|
| 465 | + 4.0_wp * ( r(k,j,i-1) + r(k,j,i+1) + & |
|---|
| 466 | r(k,j+1,i) + r(k,j-1,i) ) & |
|---|
| 467 | + 2.0_wp * ( r(k,j-1,i-1) + r(k,j+1,i-1) + & |
|---|
| 468 | r(k,j-1,i+1) + r(k,j+1,i+1) ) & |
|---|
| 469 | + 4.0_wp * r(km1,j,i) & |
|---|
| 470 | + 2.0_wp * ( r(km1,j,i-1) + r(km1,j,i+1) + & |
|---|
| 471 | r(km1,j+1,i) + r(km1,j-1,i) ) & |
|---|
| 472 | + ( r(km1,j-1,i-1) + r(km1,j+1,i-1) + & |
|---|
| 473 | r(km1,j-1,i+1) + r(km1,j+1,i+1) ) & |
|---|
| 474 | + 4.0_wp * r(kp1,j,i) & |
|---|
| 475 | + 2.0_wp * ( r(kp1,j,i-1) + r(kp1,j,i+1) + & |
|---|
| 476 | r(kp1,j+1,i) + r(kp1,j-1,i) ) & |
|---|
| 477 | + ( r(kp1,j-1,i-1) + r(kp1,j+1,i-1) + & |
|---|
| 478 | r(kp1,j-1,i+1) + r(kp1,j+1,i+1) ) & |
|---|
| 479 | ) |
|---|
| 480 | ENDDO |
|---|
| 481 | ENDDO |
|---|
| 482 | ENDDO |
|---|
| 483 | !$OMP ENDDO |
|---|
| 484 | !$OMP END PARALLEL |
|---|
| 485 | |
|---|
| 486 | ! |
|---|
| 487 | !-- Ghost point exchange |
|---|
| 488 | CALL exchange_horiz( f_mg, 1) |
|---|
| 489 | ! |
|---|
| 490 | !-- Horizontal boundary conditions |
|---|
| 491 | IF ( .NOT. bc_lr_cyc ) THEN |
|---|
| 492 | IF ( inflow_l .OR. outflow_l .OR. nest_bound_l .OR. & |
|---|
| 493 | force_bound_l ) THEN |
|---|
| 494 | f_mg(:,:,nxl_mg(l)-1) = f_mg(:,:,nxl_mg(l)) |
|---|
| 495 | ENDIF |
|---|
| 496 | IF ( inflow_r .OR. outflow_r .OR. nest_bound_r .OR. & |
|---|
| 497 | force_bound_r ) THEN |
|---|
| 498 | f_mg(:,:,nxr_mg(l)+1) = f_mg(:,:,nxr_mg(l)) |
|---|
| 499 | ENDIF |
|---|
| 500 | ENDIF |
|---|
| 501 | |
|---|
| 502 | IF ( .NOT. bc_ns_cyc ) THEN |
|---|
| 503 | IF ( inflow_n .OR. outflow_n .OR. nest_bound_n .OR. & |
|---|
| 504 | force_bound_n ) THEN |
|---|
| 505 | f_mg(:,nyn_mg(l)+1,:) = f_mg(:,nyn_mg(l),:) |
|---|
| 506 | ENDIF |
|---|
| 507 | IF ( inflow_s .OR. outflow_s .OR. nest_bound_s .OR. & |
|---|
| 508 | force_bound_s ) THEN |
|---|
| 509 | f_mg(:,nys_mg(l)-1,:) = f_mg(:,nys_mg(l),:) |
|---|
| 510 | ENDIF |
|---|
| 511 | ENDIF |
|---|
| 512 | |
|---|
| 513 | ! |
|---|
| 514 | !-- Boundary conditions at bottom and top of the domain. |
|---|
| 515 | !-- These points are not handled by the above loop. Points may be within |
|---|
| 516 | !-- buildings, but that doesn't matter. Remark: f_mg is ordered sequentielly |
|---|
| 517 | !-- after interpolation on coarse grid (is ordered in odd-even blocks further |
|---|
| 518 | !-- below). |
|---|
| 519 | IF ( ibc_p_b == 1 ) THEN |
|---|
| 520 | f_mg(nzb,:,: ) = f_mg(nzb+1,:,:) |
|---|
| 521 | ELSE |
|---|
| 522 | f_mg(nzb,:,: ) = 0.0_wp |
|---|
| 523 | ENDIF |
|---|
| 524 | |
|---|
| 525 | IF ( ibc_p_t == 1 ) THEN |
|---|
| 526 | f_mg(nzt_mg(l)+1,:,: ) = f_mg(nzt_mg(l),:,:) |
|---|
| 527 | ELSE |
|---|
| 528 | f_mg(nzt_mg(l)+1,:,: ) = 0.0_wp |
|---|
| 529 | ENDIF |
|---|
| 530 | |
|---|
| 531 | CALL cpu_log( log_point_s(54), 'restrict', 'stop' ) |
|---|
| 532 | ! |
|---|
| 533 | !-- Since residual is in sequential order after interpolation, an additional |
|---|
| 534 | !-- sorting in odd-even blocks along z dimension is required at this point. |
|---|
| 535 | CALL sort_k_to_even_odd_blocks( f_mg , l) |
|---|
| 536 | |
|---|
| 537 | END SUBROUTINE restrict |
|---|
| 538 | |
|---|
| 539 | |
|---|
| 540 | !------------------------------------------------------------------------------! |
|---|
| 541 | ! Description: |
|---|
| 542 | ! ------------ |
|---|
| 543 | !> Interpolates the correction of the perturbation pressure |
|---|
| 544 | !> to the next finer grid. |
|---|
| 545 | !------------------------------------------------------------------------------! |
|---|
| 546 | SUBROUTINE prolong( p, temp ) |
|---|
| 547 | |
|---|
| 548 | |
|---|
| 549 | USE control_parameters, & |
|---|
| 550 | ONLY: bc_lr_cyc, bc_ns_cyc, ibc_p_b, ibc_p_t |
|---|
| 551 | USE indices, & |
|---|
| 552 | ONLY: nxl_mg, nxr_mg, nys_mg, nyn_mg, nzb, nzt_mg |
|---|
| 553 | |
|---|
| 554 | IMPLICIT NONE |
|---|
| 555 | |
|---|
| 556 | INTEGER(iwp) :: i !< index variable along x on coarser grid level |
|---|
| 557 | INTEGER(iwp) :: j !< index variable along y on coarser grid level |
|---|
| 558 | INTEGER(iwp) :: k !< index variable along z on coarser grid level |
|---|
| 559 | INTEGER(iwp) :: l !< index indicating finer grid level |
|---|
| 560 | INTEGER(iwp) :: kp1 !< index variable along z |
|---|
| 561 | INTEGER(iwp) :: ke !< index for prolog even |
|---|
| 562 | INTEGER(iwp) :: ko !< index for prolog odd |
|---|
| 563 | |
|---|
| 564 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level-1)+1, & |
|---|
| 565 | nys_mg(grid_level-1)-1:nyn_mg(grid_level-1)+1, & |
|---|
| 566 | nxl_mg(grid_level-1)-1:nxr_mg(grid_level-1)+1 ) :: & |
|---|
| 567 | p !< perturbation pressure on coarser grid level |
|---|
| 568 | |
|---|
| 569 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
|---|
| 570 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
|---|
| 571 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: & |
|---|
| 572 | temp !< perturbation pressure on finer grid level |
|---|
| 573 | |
|---|
| 574 | |
|---|
| 575 | CALL cpu_log( log_point_s(55), 'prolong', 'start' ) |
|---|
| 576 | |
|---|
| 577 | ! |
|---|
| 578 | !-- First, store elements of the coarser grid on the next finer grid |
|---|
| 579 | l = grid_level |
|---|
| 580 | ind_even_odd = even_odd_level(grid_level-1) |
|---|
| 581 | |
|---|
| 582 | !$OMP PARALLEL PRIVATE (i,j,k,kp1,ke,ko) |
|---|
| 583 | !$OMP DO |
|---|
| 584 | DO i = nxl_mg(l-1), nxr_mg(l-1) |
|---|
| 585 | DO j = nys_mg(l-1), nyn_mg(l-1) |
|---|
| 586 | |
|---|
| 587 | !DIR$ IVDEP |
|---|
| 588 | DO k = ind_even_odd+1, nzt_mg(l-1) |
|---|
| 589 | kp1 = k - ind_even_odd |
|---|
| 590 | ke = 2 * ( k-ind_even_odd - 1 ) + 1 |
|---|
| 591 | ko = 2 * k - 1 |
|---|
| 592 | ! |
|---|
| 593 | !-- Points of the coarse grid are directly stored on the next finer |
|---|
| 594 | !-- grid |
|---|
| 595 | temp(ko,2*j,2*i) = p(k,j,i) |
|---|
| 596 | ! |
|---|
| 597 | !-- Points between two coarse-grid points |
|---|
| 598 | temp(ko,2*j,2*i+1) = 0.5_wp * ( p(k,j,i) + p(k,j,i+1) ) |
|---|
| 599 | temp(ko,2*j+1,2*i) = 0.5_wp * ( p(k,j,i) + p(k,j+1,i) ) |
|---|
| 600 | temp(ke,2*j,2*i) = 0.5_wp * ( p(k,j,i) + p(kp1,j,i) ) |
|---|
| 601 | ! |
|---|
| 602 | !-- Points in the center of the planes stretched by four points |
|---|
| 603 | !-- of the coarse grid cube |
|---|
| 604 | temp(ko,2*j+1,2*i+1) = 0.25_wp * ( p(k,j,i) + p(k,j,i+1) + & |
|---|
| 605 | p(k,j+1,i) + p(k,j+1,i+1) ) |
|---|
| 606 | temp(ke,2*j,2*i+1) = 0.25_wp * ( p(k,j,i) + p(k,j,i+1) + & |
|---|
| 607 | p(kp1,j,i) + p(kp1,j,i+1) ) |
|---|
| 608 | temp(ke,2*j+1,2*i) = 0.25_wp * ( p(k,j,i) + p(k,j+1,i) + & |
|---|
| 609 | p(kp1,j,i) + p(kp1,j+1,i) ) |
|---|
| 610 | ! |
|---|
| 611 | !-- Points in the middle of coarse grid cube |
|---|
| 612 | temp(ke,2*j+1,2*i+1) = 0.125_wp * & |
|---|
| 613 | ( p(k,j,i) + p(k,j,i+1) + & |
|---|
| 614 | p(k,j+1,i) + p(k,j+1,i+1) + & |
|---|
| 615 | p(kp1,j,i) + p(kp1,j,i+1) + & |
|---|
| 616 | p(kp1,j+1,i) + p(kp1,j+1,i+1) ) |
|---|
| 617 | |
|---|
| 618 | ENDDO |
|---|
| 619 | |
|---|
| 620 | !DIR$ IVDEP |
|---|
| 621 | DO k = nzb+1, ind_even_odd |
|---|
| 622 | kp1 = k + ind_even_odd + 1 |
|---|
| 623 | ke = 2 * k |
|---|
| 624 | ko = 2 * ( k + ind_even_odd ) |
|---|
| 625 | ! |
|---|
| 626 | !-- Points of the coarse grid are directly stored on the next finer |
|---|
| 627 | !-- grid |
|---|
| 628 | temp(ko,2*j,2*i) = p(k,j,i) |
|---|
| 629 | ! |
|---|
| 630 | !-- Points between two coarse-grid points |
|---|
| 631 | temp(ko,2*j,2*i+1) = 0.5_wp * ( p(k,j,i) + p(k,j,i+1) ) |
|---|
| 632 | temp(ko,2*j+1,2*i) = 0.5_wp * ( p(k,j,i) + p(k,j+1,i) ) |
|---|
| 633 | temp(ke,2*j,2*i) = 0.5_wp * ( p(k,j,i) + p(kp1,j,i) ) |
|---|
| 634 | ! |
|---|
| 635 | !-- Points in the center of the planes stretched by four points |
|---|
| 636 | !-- of the coarse grid cube |
|---|
| 637 | temp(ko,2*j+1,2*i+1) = 0.25_wp * ( p(k,j,i) + p(k,j,i+1) + & |
|---|
| 638 | p(k,j+1,i) + p(k,j+1,i+1) ) |
|---|
| 639 | temp(ke,2*j,2*i+1) = 0.25_wp * ( p(k,j,i) + p(k,j,i+1) + & |
|---|
| 640 | p(kp1,j,i) + p(kp1,j,i+1) ) |
|---|
| 641 | temp(ke,2*j+1,2*i) = 0.25_wp * ( p(k,j,i) + p(k,j+1,i) + & |
|---|
| 642 | p(kp1,j,i) + p(kp1,j+1,i) ) |
|---|
| 643 | ! |
|---|
| 644 | !-- Points in the middle of coarse grid cube |
|---|
| 645 | temp(ke,2*j+1,2*i+1) = 0.125_wp * & |
|---|
| 646 | ( p(k,j,i) + p(k,j,i+1) + & |
|---|
| 647 | p(k,j+1,i) + p(k,j+1,i+1) + & |
|---|
| 648 | p(kp1,j,i) + p(kp1,j,i+1) + & |
|---|
| 649 | p(kp1,j+1,i) + p(kp1,j+1,i+1) ) |
|---|
| 650 | |
|---|
| 651 | ENDDO |
|---|
| 652 | |
|---|
| 653 | ENDDO |
|---|
| 654 | ENDDO |
|---|
| 655 | !$OMP END PARALLEL |
|---|
| 656 | |
|---|
| 657 | ind_even_odd = even_odd_level(grid_level) |
|---|
| 658 | ! |
|---|
| 659 | !-- Horizontal boundary conditions |
|---|
| 660 | CALL exchange_horiz( temp, 1) |
|---|
| 661 | |
|---|
| 662 | IF ( .NOT. bc_lr_cyc ) THEN |
|---|
| 663 | IF ( inflow_l .OR. outflow_l .OR. nest_bound_l .OR. & |
|---|
| 664 | force_bound_l ) THEN |
|---|
| 665 | temp(:,:,nxl_mg(l)-1) = temp(:,:,nxl_mg(l)) |
|---|
| 666 | ENDIF |
|---|
| 667 | IF ( inflow_r .OR. outflow_r .OR. nest_bound_r .OR. & |
|---|
| 668 | force_bound_r ) THEN |
|---|
| 669 | temp(:,:,nxr_mg(l)+1) = temp(:,:,nxr_mg(l)) |
|---|
| 670 | ENDIF |
|---|
| 671 | ENDIF |
|---|
| 672 | |
|---|
| 673 | IF ( .NOT. bc_ns_cyc ) THEN |
|---|
| 674 | IF ( inflow_n .OR. outflow_n .OR. nest_bound_n .OR. & |
|---|
| 675 | force_bound_n ) THEN |
|---|
| 676 | temp(:,nyn_mg(l)+1,:) = temp(:,nyn_mg(l),:) |
|---|
| 677 | ENDIF |
|---|
| 678 | IF ( inflow_s .OR. outflow_s .OR. nest_bound_s .OR. & |
|---|
| 679 | force_bound_s ) THEN |
|---|
| 680 | temp(:,nys_mg(l)-1,:) = temp(:,nys_mg(l),:) |
|---|
| 681 | ENDIF |
|---|
| 682 | ENDIF |
|---|
| 683 | |
|---|
| 684 | ! |
|---|
| 685 | !-- Bottom and top boundary conditions |
|---|
| 686 | IF ( ibc_p_b == 1 ) THEN |
|---|
| 687 | ! |
|---|
| 688 | !-- equivalent to temp(nzb,:,: ) = temp(nzb+1,:,:) |
|---|
| 689 | temp(nzb,:,: ) = temp(ind_even_odd+1,:,:) |
|---|
| 690 | ELSE |
|---|
| 691 | temp(nzb,:,: ) = 0.0_wp |
|---|
| 692 | ENDIF |
|---|
| 693 | |
|---|
| 694 | IF ( ibc_p_t == 1 ) THEN |
|---|
| 695 | ! |
|---|
| 696 | !-- equivalent to temp(nzt_mg(l)+1,:,: ) = temp(nzt_mg(l),:,:) |
|---|
| 697 | temp(nzt_mg(l)+1,:,: ) = temp(ind_even_odd,:,:) |
|---|
| 698 | ELSE |
|---|
| 699 | temp(nzt_mg(l)+1,:,: ) = 0.0_wp |
|---|
| 700 | ENDIF |
|---|
| 701 | |
|---|
| 702 | CALL cpu_log( log_point_s(55), 'prolong', 'stop' ) |
|---|
| 703 | |
|---|
| 704 | END SUBROUTINE prolong |
|---|
| 705 | |
|---|
| 706 | |
|---|
| 707 | !------------------------------------------------------------------------------! |
|---|
| 708 | ! Description: |
|---|
| 709 | ! ------------ |
|---|
| 710 | !> Relaxation method for the multigrid scheme. A Gauss-Seidel iteration with |
|---|
| 711 | !> 3D-Red-Black decomposition (GS-RB) is used. |
|---|
| 712 | !------------------------------------------------------------------------------! |
|---|
| 713 | SUBROUTINE redblack( f_mg, p_mg ) |
|---|
| 714 | |
|---|
| 715 | |
|---|
| 716 | USE arrays_3d, & |
|---|
| 717 | ONLY: f1_mg, f2_mg, f3_mg, rho_air_mg |
|---|
| 718 | |
|---|
| 719 | USE control_parameters, & |
|---|
| 720 | ONLY: bc_lr_cyc, bc_ns_cyc, ibc_p_b, ibc_p_t, ngsrb |
|---|
| 721 | |
|---|
| 722 | USE grid_variables, & |
|---|
| 723 | ONLY: ddx2_mg, ddy2_mg |
|---|
| 724 | |
|---|
| 725 | USE indices, & |
|---|
| 726 | ONLY: nxl_mg, nxr_mg, nys_mg, nyn_mg, nzb, nzt_mg |
|---|
| 727 | |
|---|
| 728 | IMPLICIT NONE |
|---|
| 729 | |
|---|
| 730 | INTEGER(iwp) :: color !< grid point color, either red or black |
|---|
| 731 | INTEGER(iwp) :: i !< index variable along x |
|---|
| 732 | INTEGER(iwp) :: ic !< index variable along x |
|---|
| 733 | INTEGER(iwp) :: j !< index variable along y |
|---|
| 734 | INTEGER(iwp) :: jc !< index variable along y |
|---|
| 735 | INTEGER(iwp) :: jj !< index variable along y |
|---|
| 736 | INTEGER(iwp) :: k !< index variable along z |
|---|
| 737 | INTEGER(iwp) :: l !< grid level |
|---|
| 738 | INTEGER(iwp) :: n !< loop variable GauÃ-Seidel iterations |
|---|
| 739 | INTEGER(iwp) :: km1 !< index variable (k-1) |
|---|
| 740 | INTEGER(iwp) :: kp1 !< index variable (k+1) |
|---|
| 741 | |
|---|
| 742 | LOGICAL :: unroll !< flag indicating whether loop unrolling is possible |
|---|
| 743 | |
|---|
| 744 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
|---|
| 745 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
|---|
| 746 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: & |
|---|
| 747 | f_mg !< residual of perturbation pressure |
|---|
| 748 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
|---|
| 749 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
|---|
| 750 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: & |
|---|
| 751 | p_mg !< perturbation pressure |
|---|
| 752 | |
|---|
| 753 | l = grid_level |
|---|
| 754 | |
|---|
| 755 | unroll = ( MOD( nyn_mg(l)-nys_mg(l)+1, 4 ) == 0 .AND. & |
|---|
| 756 | MOD( nxr_mg(l)-nxl_mg(l)+1, 2 ) == 0 ) |
|---|
| 757 | |
|---|
| 758 | DO n = 1, ngsrb |
|---|
| 759 | |
|---|
| 760 | DO color = 1, 2 |
|---|
| 761 | |
|---|
| 762 | IF ( .NOT. unroll ) THEN |
|---|
| 763 | |
|---|
| 764 | CALL cpu_log( log_point_s(36), 'redblack_no_unroll_f', 'start' ) |
|---|
| 765 | ! |
|---|
| 766 | !-- Without unrolling of loops, no cache optimization |
|---|
| 767 | !$OMP PARALLEL PRIVATE (i,j,k,km1,kp1) |
|---|
| 768 | !$OMP DO |
|---|
| 769 | DO i = nxl_mg(l), nxr_mg(l), 2 |
|---|
| 770 | DO j = nys_mg(l) + 2 - color, nyn_mg(l), 2 |
|---|
| 771 | !DIR$ IVDEP |
|---|
| 772 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 773 | km1 = k-ind_even_odd-1 |
|---|
| 774 | kp1 = k-ind_even_odd |
|---|
| 775 | p_mg(k,j,i) = 1.0_wp / f1_mg_b(k,l) * ( & |
|---|
| 776 | rho_air_mg(k,l) * ddx2_mg(l) * & |
|---|
| 777 | ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
|---|
| 778 | + rho_air_mg(k,l) * ddy2_mg(l) * & |
|---|
| 779 | ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
|---|
| 780 | + f2_mg_b(k,l) * p_mg(kp1,j,i) & |
|---|
| 781 | + f3_mg_b(k,l) * p_mg(km1,j,i) & |
|---|
| 782 | - f_mg(k,j,i) ) |
|---|
| 783 | ENDDO |
|---|
| 784 | ENDDO |
|---|
| 785 | ENDDO |
|---|
| 786 | |
|---|
| 787 | !$OMP DO |
|---|
| 788 | DO i = nxl_mg(l)+1, nxr_mg(l), 2 |
|---|
| 789 | DO j = nys_mg(l) + (color-1), nyn_mg(l), 2 |
|---|
| 790 | !DIR$ IVDEP |
|---|
| 791 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 792 | km1 = k-ind_even_odd-1 |
|---|
| 793 | kp1 = k-ind_even_odd |
|---|
| 794 | p_mg(k,j,i) = 1.0_wp / f1_mg_b(k,l) * ( & |
|---|
| 795 | rho_air_mg(k,l) * ddx2_mg(l) * & |
|---|
| 796 | ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
|---|
| 797 | + rho_air_mg(k,l) * ddy2_mg(l) * & |
|---|
| 798 | ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
|---|
| 799 | + f2_mg_b(k,l) * p_mg(kp1,j,i) & |
|---|
| 800 | + f3_mg_b(k,l) * p_mg(km1,j,i) & |
|---|
| 801 | - f_mg(k,j,i) ) |
|---|
| 802 | ENDDO |
|---|
| 803 | ENDDO |
|---|
| 804 | ENDDO |
|---|
| 805 | |
|---|
| 806 | !$OMP DO |
|---|
| 807 | DO i = nxl_mg(l), nxr_mg(l), 2 |
|---|
| 808 | DO j = nys_mg(l) + (color-1), nyn_mg(l), 2 |
|---|
| 809 | !DIR$ IVDEP |
|---|
| 810 | DO k = nzb+1, ind_even_odd |
|---|
| 811 | km1 = k+ind_even_odd |
|---|
| 812 | kp1 = k+ind_even_odd+1 |
|---|
| 813 | p_mg(k,j,i) = 1.0_wp / f1_mg_b(k,l) * ( & |
|---|
| 814 | rho_air_mg(k,l) * ddx2_mg(l) * & |
|---|
| 815 | ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
|---|
| 816 | + rho_air_mg(k,l) * ddy2_mg(l) * & |
|---|
| 817 | ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
|---|
| 818 | + f2_mg_b(k,l) * p_mg(kp1,j,i) & |
|---|
| 819 | + f3_mg_b(k,l) * p_mg(km1,j,i) & |
|---|
| 820 | - f_mg(k,j,i) ) |
|---|
| 821 | ENDDO |
|---|
| 822 | ENDDO |
|---|
| 823 | ENDDO |
|---|
| 824 | |
|---|
| 825 | !$OMP DO |
|---|
| 826 | DO i = nxl_mg(l)+1, nxr_mg(l), 2 |
|---|
| 827 | DO j = nys_mg(l) + 2 - color, nyn_mg(l), 2 |
|---|
| 828 | !DIR$ IVDEP |
|---|
| 829 | DO k = nzb+1, ind_even_odd |
|---|
| 830 | km1 = k+ind_even_odd |
|---|
| 831 | kp1 = k+ind_even_odd+1 |
|---|
| 832 | p_mg(k,j,i) = 1.0_wp / f1_mg_b(k,l) * ( & |
|---|
| 833 | rho_air_mg(k,l) * ddx2_mg(l) * & |
|---|
| 834 | ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
|---|
| 835 | + rho_air_mg(k,l) * ddy2_mg(l) * & |
|---|
| 836 | ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
|---|
| 837 | + f2_mg_b(k,l) * p_mg(kp1,j,i) & |
|---|
| 838 | + f3_mg_b(k,l) * p_mg(km1,j,i) & |
|---|
| 839 | - f_mg(k,j,i) ) |
|---|
| 840 | ENDDO |
|---|
| 841 | ENDDO |
|---|
| 842 | ENDDO |
|---|
| 843 | !$OMP END PARALLEL |
|---|
| 844 | |
|---|
| 845 | CALL cpu_log( log_point_s(36), 'redblack_no_unroll_f', 'stop' ) |
|---|
| 846 | |
|---|
| 847 | ELSE |
|---|
| 848 | ! |
|---|
| 849 | !-- Loop unrolling along y, only one i loop for better cache use |
|---|
| 850 | CALL cpu_log( log_point_s(38), 'redblack_unroll_f', 'start' ) |
|---|
| 851 | |
|---|
| 852 | !$OMP PARALLEL PRIVATE (i,j,k,ic,jc,km1,kp1,jj) |
|---|
| 853 | !$OMP DO |
|---|
| 854 | DO ic = nxl_mg(l), nxr_mg(l), 2 |
|---|
| 855 | DO jc = nys_mg(l), nyn_mg(l), 4 |
|---|
| 856 | i = ic |
|---|
| 857 | jj = jc+2-color |
|---|
| 858 | !DIR$ IVDEP |
|---|
| 859 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 860 | km1 = k-ind_even_odd-1 |
|---|
| 861 | kp1 = k-ind_even_odd |
|---|
| 862 | j = jj |
|---|
| 863 | p_mg(k,j,i) = 1.0_wp / f1_mg_b(k,l) * ( & |
|---|
| 864 | rho_air_mg(k,l) * ddx2_mg(l) * & |
|---|
| 865 | ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
|---|
| 866 | + rho_air_mg(k,l) * ddy2_mg(l) * & |
|---|
| 867 | ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
|---|
| 868 | + f2_mg_b(k,l) * p_mg(kp1,j,i) & |
|---|
| 869 | + f3_mg_b(k,l) * p_mg(km1,j,i) & |
|---|
| 870 | - f_mg(k,j,i) ) |
|---|
| 871 | j = jj+2 |
|---|
| 872 | p_mg(k,j,i) = 1.0_wp / f1_mg_b(k,l) * ( & |
|---|
| 873 | rho_air_mg(k,l) * ddx2_mg(l) * & |
|---|
| 874 | ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
|---|
| 875 | + rho_air_mg(k,l) * ddy2_mg(l) * & |
|---|
| 876 | ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
|---|
| 877 | + f2_mg_b(k,l) * p_mg(kp1,j,i) & |
|---|
| 878 | + f3_mg_b(k,l) * p_mg(km1,j,i) & |
|---|
| 879 | - f_mg(k,j,i) ) |
|---|
| 880 | ENDDO |
|---|
| 881 | |
|---|
| 882 | i = ic+1 |
|---|
| 883 | jj = jc+color-1 |
|---|
| 884 | !DIR$ IVDEP |
|---|
| 885 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 886 | km1 = k-ind_even_odd-1 |
|---|
| 887 | kp1 = k-ind_even_odd |
|---|
| 888 | j = jj |
|---|
| 889 | p_mg(k,j,i) = 1.0_wp / f1_mg_b(k,l) * ( & |
|---|
| 890 | rho_air_mg(k,l) * ddx2_mg(l) * & |
|---|
| 891 | ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
|---|
| 892 | + rho_air_mg(k,l) * ddy2_mg(l) * & |
|---|
| 893 | ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
|---|
| 894 | + f2_mg_b(k,l) * p_mg(kp1,j,i) & |
|---|
| 895 | + f3_mg_b(k,l) * p_mg(km1,j,i) & |
|---|
| 896 | - f_mg(k,j,i) ) |
|---|
| 897 | j = jj+2 |
|---|
| 898 | p_mg(k,j,i) = 1.0_wp / f1_mg_b(k,l) * ( & |
|---|
| 899 | rho_air_mg(k,l) * ddx2_mg(l) * & |
|---|
| 900 | ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
|---|
| 901 | + rho_air_mg(k,l) * ddy2_mg(l) * & |
|---|
| 902 | ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
|---|
| 903 | + f2_mg_b(k,l) * p_mg(kp1,j,i) & |
|---|
| 904 | + f3_mg_b(k,l) * p_mg(km1,j,i) & |
|---|
| 905 | - f_mg(k,j,i) ) |
|---|
| 906 | ENDDO |
|---|
| 907 | |
|---|
| 908 | i = ic |
|---|
| 909 | jj = jc+color-1 |
|---|
| 910 | !DIR$ IVDEP |
|---|
| 911 | DO k = nzb+1, ind_even_odd |
|---|
| 912 | km1 = k+ind_even_odd |
|---|
| 913 | kp1 = k+ind_even_odd+1 |
|---|
| 914 | j = jj |
|---|
| 915 | p_mg(k,j,i) = 1.0_wp / f1_mg_b(k,l) * ( & |
|---|
| 916 | rho_air_mg(k,l) * ddx2_mg(l) * & |
|---|
| 917 | ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
|---|
| 918 | + rho_air_mg(k,l) * ddy2_mg(l) * & |
|---|
| 919 | ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
|---|
| 920 | + f2_mg_b(k,l) * p_mg(kp1,j,i) & |
|---|
| 921 | + f3_mg_b(k,l) * p_mg(km1,j,i) & |
|---|
| 922 | - f_mg(k,j,i) ) |
|---|
| 923 | j = jj+2 |
|---|
| 924 | p_mg(k,j,i) = 1.0_wp / f1_mg_b(k,l) * ( & |
|---|
| 925 | rho_air_mg(k,l) * ddx2_mg(l) * & |
|---|
| 926 | ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
|---|
| 927 | + rho_air_mg(k,l) * ddy2_mg(l) * & |
|---|
| 928 | ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
|---|
| 929 | + f2_mg_b(k,l) * p_mg(kp1,j,i) & |
|---|
| 930 | + f3_mg_b(k,l) * p_mg(km1,j,i) & |
|---|
| 931 | - f_mg(k,j,i) ) |
|---|
| 932 | ENDDO |
|---|
| 933 | |
|---|
| 934 | i = ic+1 |
|---|
| 935 | jj = jc+2-color |
|---|
| 936 | !DIR$ IVDEP |
|---|
| 937 | DO k = nzb+1, ind_even_odd |
|---|
| 938 | km1 = k+ind_even_odd |
|---|
| 939 | kp1 = k+ind_even_odd+1 |
|---|
| 940 | j = jj |
|---|
| 941 | p_mg(k,j,i) = 1.0_wp / f1_mg_b(k,l) * ( & |
|---|
| 942 | rho_air_mg(k,l) * ddx2_mg(l) * & |
|---|
| 943 | ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
|---|
| 944 | + rho_air_mg(k,l) * ddy2_mg(l) * & |
|---|
| 945 | ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
|---|
| 946 | + f2_mg_b(k,l) * p_mg(kp1,j,i) & |
|---|
| 947 | + f3_mg_b(k,l) * p_mg(km1,j,i) & |
|---|
| 948 | - f_mg(k,j,i) ) |
|---|
| 949 | j = jj+2 |
|---|
| 950 | p_mg(k,j,i) = 1.0_wp / f1_mg_b(k,l) * ( & |
|---|
| 951 | rho_air_mg(k,l) * ddx2_mg(l) * & |
|---|
| 952 | ( p_mg(k,j,i+1) + p_mg(k,j,i-1) ) & |
|---|
| 953 | + rho_air_mg(k,l) * ddy2_mg(l) * & |
|---|
| 954 | ( p_mg(k,j+1,i) + p_mg(k,j-1,i) ) & |
|---|
| 955 | + f2_mg_b(k,l) * p_mg(kp1,j,i) & |
|---|
| 956 | + f3_mg_b(k,l) * p_mg(km1,j,i) & |
|---|
| 957 | - f_mg(k,j,i) ) |
|---|
| 958 | ENDDO |
|---|
| 959 | |
|---|
| 960 | ENDDO |
|---|
| 961 | ENDDO |
|---|
| 962 | !$OMP END PARALLEL |
|---|
| 963 | |
|---|
| 964 | CALL cpu_log( log_point_s(38), 'redblack_unroll_f', 'stop' ) |
|---|
| 965 | |
|---|
| 966 | ENDIF |
|---|
| 967 | |
|---|
| 968 | ! |
|---|
| 969 | !-- Horizontal boundary conditions |
|---|
| 970 | CALL special_exchange_horiz( p_mg, color ) |
|---|
| 971 | |
|---|
| 972 | IF ( .NOT. bc_lr_cyc ) THEN |
|---|
| 973 | IF ( inflow_l .OR. outflow_l .OR. nest_bound_l .OR. & |
|---|
| 974 | force_bound_l ) THEN |
|---|
| 975 | p_mg(:,:,nxl_mg(l)-1) = p_mg(:,:,nxl_mg(l)) |
|---|
| 976 | ENDIF |
|---|
| 977 | IF ( inflow_r .OR. outflow_r .OR. nest_bound_r .OR. & |
|---|
| 978 | force_bound_r ) THEN |
|---|
| 979 | p_mg(:,:,nxr_mg(l)+1) = p_mg(:,:,nxr_mg(l)) |
|---|
| 980 | ENDIF |
|---|
| 981 | ENDIF |
|---|
| 982 | |
|---|
| 983 | IF ( .NOT. bc_ns_cyc ) THEN |
|---|
| 984 | IF ( inflow_n .OR. outflow_n .OR. nest_bound_n .OR. & |
|---|
| 985 | force_bound_n ) THEN |
|---|
| 986 | p_mg(:,nyn_mg(l)+1,:) = p_mg(:,nyn_mg(l),:) |
|---|
| 987 | ENDIF |
|---|
| 988 | IF ( inflow_s .OR. outflow_s .OR. nest_bound_s .OR. & |
|---|
| 989 | force_bound_s ) THEN |
|---|
| 990 | p_mg(:,nys_mg(l)-1,:) = p_mg(:,nys_mg(l),:) |
|---|
| 991 | ENDIF |
|---|
| 992 | ENDIF |
|---|
| 993 | |
|---|
| 994 | ! |
|---|
| 995 | !-- Bottom and top boundary conditions |
|---|
| 996 | IF ( ibc_p_b == 1 ) THEN |
|---|
| 997 | ! |
|---|
| 998 | !-- equivalent to p_mg(nzb,:,: ) = p_mg(nzb+1,:,:) |
|---|
| 999 | p_mg(nzb,:,: ) = p_mg(ind_even_odd+1,:,:) |
|---|
| 1000 | ELSE |
|---|
| 1001 | p_mg(nzb,:,: ) = 0.0_wp |
|---|
| 1002 | ENDIF |
|---|
| 1003 | |
|---|
| 1004 | IF ( ibc_p_t == 1 ) THEN |
|---|
| 1005 | ! |
|---|
| 1006 | !-- equivalent to p_mg(nzt_mg(l)+1,:,: ) = p_mg(nzt_mg(l),:,:) |
|---|
| 1007 | p_mg(nzt_mg(l)+1,:,: ) = p_mg(ind_even_odd,:,:) |
|---|
| 1008 | ELSE |
|---|
| 1009 | p_mg(nzt_mg(l)+1,:,: ) = 0.0_wp |
|---|
| 1010 | ENDIF |
|---|
| 1011 | |
|---|
| 1012 | ENDDO |
|---|
| 1013 | |
|---|
| 1014 | ENDDO |
|---|
| 1015 | |
|---|
| 1016 | END SUBROUTINE redblack |
|---|
| 1017 | |
|---|
| 1018 | |
|---|
| 1019 | !------------------------------------------------------------------------------! |
|---|
| 1020 | ! Description: |
|---|
| 1021 | ! ------------ |
|---|
| 1022 | !> Sort k-Dimension from sequential into blocks of even and odd. |
|---|
| 1023 | !> This is required to vectorize the red-black subroutine. |
|---|
| 1024 | !> Version for 3D-REAL arrays |
|---|
| 1025 | !------------------------------------------------------------------------------! |
|---|
| 1026 | SUBROUTINE sort_k_to_even_odd_blocks( p_mg , glevel ) |
|---|
| 1027 | |
|---|
| 1028 | |
|---|
| 1029 | USE control_parameters, & |
|---|
| 1030 | ONLY: grid_level |
|---|
| 1031 | |
|---|
| 1032 | USE indices, & |
|---|
| 1033 | ONLY: nxl_mg, nxr_mg, nys_mg, nyn_mg, nzb, nzt_mg |
|---|
| 1034 | |
|---|
| 1035 | IMPLICIT NONE |
|---|
| 1036 | |
|---|
| 1037 | INTEGER(iwp), INTENT(IN) :: glevel !< grid level |
|---|
| 1038 | |
|---|
| 1039 | REAL(wp), DIMENSION(nzb:nzt_mg(glevel)+1, & |
|---|
| 1040 | nys_mg(glevel)-1:nyn_mg(glevel)+1, & |
|---|
| 1041 | nxl_mg(glevel)-1:nxr_mg(glevel)+1) :: & |
|---|
| 1042 | p_mg !< array to be sorted |
|---|
| 1043 | ! |
|---|
| 1044 | !-- Local variables |
|---|
| 1045 | INTEGER(iwp) :: i !< index variable along x |
|---|
| 1046 | INTEGER(iwp) :: j !< index variable along y |
|---|
| 1047 | INTEGER(iwp) :: k !< index variable along z |
|---|
| 1048 | INTEGER(iwp) :: l !< grid level |
|---|
| 1049 | INTEGER(iwp) :: ind !< index variable along z |
|---|
| 1050 | REAL(wp), DIMENSION(nzb:nzt_mg(glevel)+1) :: tmp !< odd-even sorted temporary array |
|---|
| 1051 | |
|---|
| 1052 | |
|---|
| 1053 | CALL cpu_log( log_point_s(52), 'sort_k_to_even_odd', 'start' ) |
|---|
| 1054 | |
|---|
| 1055 | l = glevel |
|---|
| 1056 | ind_even_odd = even_odd_level(l) |
|---|
| 1057 | |
|---|
| 1058 | !$OMP PARALLEL PRIVATE (i,j,k,ind,tmp) |
|---|
| 1059 | !$OMP DO |
|---|
| 1060 | DO i = nxl_mg(l)-1, nxr_mg(l)+1 |
|---|
| 1061 | DO j = nys_mg(l)-1, nyn_mg(l)+1 |
|---|
| 1062 | |
|---|
| 1063 | ! |
|---|
| 1064 | !-- Sort the data with even k index |
|---|
| 1065 | ind = nzb-1 |
|---|
| 1066 | DO k = nzb, nzt_mg(l), 2 |
|---|
| 1067 | ind = ind + 1 |
|---|
| 1068 | tmp(ind) = p_mg(k,j,i) |
|---|
| 1069 | ENDDO |
|---|
| 1070 | ! |
|---|
| 1071 | !-- Sort the data with odd k index |
|---|
| 1072 | DO k = nzb+1, nzt_mg(l)+1, 2 |
|---|
| 1073 | ind = ind + 1 |
|---|
| 1074 | tmp(ind) = p_mg(k,j,i) |
|---|
| 1075 | ENDDO |
|---|
| 1076 | |
|---|
| 1077 | p_mg(:,j,i) = tmp |
|---|
| 1078 | |
|---|
| 1079 | ENDDO |
|---|
| 1080 | ENDDO |
|---|
| 1081 | !$OMP END PARALLEL |
|---|
| 1082 | |
|---|
| 1083 | CALL cpu_log( log_point_s(52), 'sort_k_to_even_odd', 'stop' ) |
|---|
| 1084 | |
|---|
| 1085 | END SUBROUTINE sort_k_to_even_odd_blocks |
|---|
| 1086 | |
|---|
| 1087 | |
|---|
| 1088 | !------------------------------------------------------------------------------! |
|---|
| 1089 | ! Description: |
|---|
| 1090 | ! ------------ |
|---|
| 1091 | !> Sort k-Dimension from sequential into blocks of even and odd. |
|---|
| 1092 | !> This is required to vectorize the red-black subroutine. |
|---|
| 1093 | !> Version for 1D-REAL arrays |
|---|
| 1094 | !------------------------------------------------------------------------------! |
|---|
| 1095 | SUBROUTINE sort_k_to_even_odd_blocks_1d( f_mg, f_mg_b, glevel ) |
|---|
| 1096 | |
|---|
| 1097 | |
|---|
| 1098 | USE indices, & |
|---|
| 1099 | ONLY: nzb, nzt_mg |
|---|
| 1100 | |
|---|
| 1101 | IMPLICIT NONE |
|---|
| 1102 | |
|---|
| 1103 | INTEGER(iwp), INTENT(IN) :: glevel !< grid level |
|---|
| 1104 | |
|---|
| 1105 | REAL(wp), DIMENSION(nzb+1:nzt_mg(glevel)) :: f_mg !< 1D input array |
|---|
| 1106 | REAL(wp), DIMENSION(nzb:nzt_mg(glevel)+1) :: f_mg_b !< 1D output array |
|---|
| 1107 | |
|---|
| 1108 | ! |
|---|
| 1109 | !-- Local variables |
|---|
| 1110 | INTEGER(iwp) :: ind !< index variable along z |
|---|
| 1111 | INTEGER(iwp) :: k !< index variable along z |
|---|
| 1112 | |
|---|
| 1113 | |
|---|
| 1114 | ind = nzb - 1 |
|---|
| 1115 | ! |
|---|
| 1116 | !-- Sort the data with even k index |
|---|
| 1117 | DO k = nzb, nzt_mg(glevel), 2 |
|---|
| 1118 | ind = ind + 1 |
|---|
| 1119 | IF ( k >= nzb+1 .AND. k <= nzt_mg(glevel) ) THEN |
|---|
| 1120 | f_mg_b(ind) = f_mg(k) |
|---|
| 1121 | ENDIF |
|---|
| 1122 | ENDDO |
|---|
| 1123 | ! |
|---|
| 1124 | !-- Sort the data with odd k index |
|---|
| 1125 | DO k = nzb+1, nzt_mg(glevel)+1, 2 |
|---|
| 1126 | ind = ind + 1 |
|---|
| 1127 | IF( k >= nzb+1 .AND. k <= nzt_mg(glevel) ) THEN |
|---|
| 1128 | f_mg_b(ind) = f_mg(k) |
|---|
| 1129 | ENDIF |
|---|
| 1130 | ENDDO |
|---|
| 1131 | |
|---|
| 1132 | END SUBROUTINE sort_k_to_even_odd_blocks_1d |
|---|
| 1133 | |
|---|
| 1134 | |
|---|
| 1135 | !------------------------------------------------------------------------------! |
|---|
| 1136 | ! Description: |
|---|
| 1137 | ! ------------ |
|---|
| 1138 | !> Sort k-Dimension from sequential into blocks of even and odd. |
|---|
| 1139 | !> This is required to vectorize the red-black subroutine. |
|---|
| 1140 | !> Version for 2D-INTEGER arrays |
|---|
| 1141 | !------------------------------------------------------------------------------! |
|---|
| 1142 | SUBROUTINE sort_k_to_even_odd_blocks_int( i_mg , glevel ) |
|---|
| 1143 | |
|---|
| 1144 | |
|---|
| 1145 | USE control_parameters, & |
|---|
| 1146 | ONLY: grid_level |
|---|
| 1147 | |
|---|
| 1148 | USE indices, & |
|---|
| 1149 | ONLY: nxl_mg, nxr_mg, nys_mg, nyn_mg, nzb, nzt_mg |
|---|
| 1150 | |
|---|
| 1151 | IMPLICIT NONE |
|---|
| 1152 | |
|---|
| 1153 | INTEGER(iwp), INTENT(IN) :: glevel !< grid level |
|---|
| 1154 | |
|---|
| 1155 | INTEGER(iwp), DIMENSION(nzb:nzt_mg(glevel)+1, & |
|---|
| 1156 | nys_mg(glevel)-1:nyn_mg(glevel)+1, & |
|---|
| 1157 | nxl_mg(glevel)-1:nxr_mg(glevel)+1) :: & |
|---|
| 1158 | i_mg !< array to be sorted |
|---|
| 1159 | ! |
|---|
| 1160 | !-- Local variables |
|---|
| 1161 | INTEGER(iwp) :: i !< index variabel along x |
|---|
| 1162 | INTEGER(iwp) :: j !< index variable along y |
|---|
| 1163 | INTEGER(iwp) :: k !< index variable along z |
|---|
| 1164 | INTEGER(iwp) :: l !< grid level |
|---|
| 1165 | INTEGER(iwp) :: ind !< index variable along z |
|---|
| 1166 | INTEGER(iwp),DIMENSION(nzb:nzt_mg(glevel)+1) :: tmp !< temporary odd-even sorted array |
|---|
| 1167 | |
|---|
| 1168 | |
|---|
| 1169 | CALL cpu_log( log_point_s(52), 'sort_k_to_even_odd', 'start' ) |
|---|
| 1170 | |
|---|
| 1171 | l = glevel |
|---|
| 1172 | ind_even_odd = even_odd_level(l) |
|---|
| 1173 | |
|---|
| 1174 | DO i = nxl_mg(l)-1, nxr_mg(l)+1 |
|---|
| 1175 | DO j = nys_mg(l)-1, nyn_mg(l)+1 |
|---|
| 1176 | |
|---|
| 1177 | ! |
|---|
| 1178 | !-- Sort the data with even k index |
|---|
| 1179 | ind = nzb-1 |
|---|
| 1180 | DO k = nzb, nzt_mg(l), 2 |
|---|
| 1181 | ind = ind + 1 |
|---|
| 1182 | tmp(ind) = i_mg(k,j,i) |
|---|
| 1183 | ENDDO |
|---|
| 1184 | ! |
|---|
| 1185 | !++ ATTENTION: Check reason for this error. Remove it or replace WRITE |
|---|
| 1186 | !++ by PALM message |
|---|
| 1187 | #if defined ( __parallel ) |
|---|
| 1188 | IF ( ind /= ind_even_odd ) THEN |
|---|
| 1189 | WRITE (0,*) 'ERROR ==> illegal ind_even_odd ',ind,ind_even_odd,l |
|---|
| 1190 | CALL MPI_ABORT(MPI_COMM_WORLD,i,j) |
|---|
| 1191 | ENDIF |
|---|
| 1192 | #endif |
|---|
| 1193 | ! |
|---|
| 1194 | !-- Sort the data with odd k index |
|---|
| 1195 | DO k = nzb+1, nzt_mg(l)+1, 2 |
|---|
| 1196 | ind = ind + 1 |
|---|
| 1197 | tmp(ind) = i_mg(k,j,i) |
|---|
| 1198 | ENDDO |
|---|
| 1199 | |
|---|
| 1200 | i_mg(:,j,i) = tmp |
|---|
| 1201 | |
|---|
| 1202 | ENDDO |
|---|
| 1203 | ENDDO |
|---|
| 1204 | |
|---|
| 1205 | CALL cpu_log( log_point_s(52), 'sort_k_to_even_odd', 'stop' ) |
|---|
| 1206 | |
|---|
| 1207 | END SUBROUTINE sort_k_to_even_odd_blocks_int |
|---|
| 1208 | |
|---|
| 1209 | |
|---|
| 1210 | !------------------------------------------------------------------------------! |
|---|
| 1211 | ! Description: |
|---|
| 1212 | ! ------------ |
|---|
| 1213 | !> Sort k-dimension from blocks of even and odd into sequential |
|---|
| 1214 | !------------------------------------------------------------------------------! |
|---|
| 1215 | SUBROUTINE sort_k_to_sequential( p_mg ) |
|---|
| 1216 | |
|---|
| 1217 | |
|---|
| 1218 | USE control_parameters, & |
|---|
| 1219 | ONLY: grid_level |
|---|
| 1220 | |
|---|
| 1221 | USE indices, & |
|---|
| 1222 | ONLY: nxl_mg, nxr_mg, nys_mg, nyn_mg, nzb, nzt_mg |
|---|
| 1223 | |
|---|
| 1224 | IMPLICIT NONE |
|---|
| 1225 | |
|---|
| 1226 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
|---|
| 1227 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
|---|
| 1228 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: & |
|---|
| 1229 | p_mg !< array to be sorted |
|---|
| 1230 | ! |
|---|
| 1231 | !-- Local variables |
|---|
| 1232 | INTEGER(iwp) :: i !< index variable along x |
|---|
| 1233 | INTEGER(iwp) :: j !< index variable along y |
|---|
| 1234 | INTEGER(iwp) :: k !< index variable along z |
|---|
| 1235 | INTEGER(iwp) :: l !< grid level |
|---|
| 1236 | INTEGER(iwp) :: ind !< index variable along z |
|---|
| 1237 | |
|---|
| 1238 | REAL(wp),DIMENSION(nzb:nzt_mg(grid_level)+1) :: tmp |
|---|
| 1239 | |
|---|
| 1240 | |
|---|
| 1241 | l = grid_level |
|---|
| 1242 | |
|---|
| 1243 | !$OMP PARALLEL PRIVATE (i,j,k,ind,tmp) |
|---|
| 1244 | !$OMP DO |
|---|
| 1245 | DO i = nxl_mg(l)-1, nxr_mg(l)+1 |
|---|
| 1246 | DO j = nys_mg(l)-1, nyn_mg(l)+1 |
|---|
| 1247 | |
|---|
| 1248 | ind = nzb - 1 |
|---|
| 1249 | tmp = p_mg(:,j,i) |
|---|
| 1250 | DO k = nzb, nzt_mg(l), 2 |
|---|
| 1251 | ind = ind + 1 |
|---|
| 1252 | p_mg(k,j,i) = tmp(ind) |
|---|
| 1253 | ENDDO |
|---|
| 1254 | |
|---|
| 1255 | DO k = nzb+1, nzt_mg(l)+1, 2 |
|---|
| 1256 | ind = ind + 1 |
|---|
| 1257 | p_mg(k,j,i) = tmp(ind) |
|---|
| 1258 | ENDDO |
|---|
| 1259 | ENDDO |
|---|
| 1260 | ENDDO |
|---|
| 1261 | !$OMP END PARALLEL |
|---|
| 1262 | |
|---|
| 1263 | END SUBROUTINE sort_k_to_sequential |
|---|
| 1264 | |
|---|
| 1265 | |
|---|
| 1266 | !------------------------------------------------------------------------------! |
|---|
| 1267 | ! Description: |
|---|
| 1268 | ! ------------ |
|---|
| 1269 | !> Gather subdomain data from all PEs. |
|---|
| 1270 | !------------------------------------------------------------------------------! |
|---|
| 1271 | SUBROUTINE mg_gather( f2, f2_sub ) |
|---|
| 1272 | |
|---|
| 1273 | USE control_parameters, & |
|---|
| 1274 | ONLY: grid_level |
|---|
| 1275 | |
|---|
| 1276 | USE cpulog, & |
|---|
| 1277 | ONLY: cpu_log, log_point_s |
|---|
| 1278 | |
|---|
| 1279 | USE indices, & |
|---|
| 1280 | ONLY: mg_loc_ind, nxl_mg, nxr_mg, nys_mg, nyn_mg, nzb, nzt_mg |
|---|
| 1281 | |
|---|
| 1282 | IMPLICIT NONE |
|---|
| 1283 | |
|---|
| 1284 | INTEGER(iwp) :: i !< |
|---|
| 1285 | INTEGER(iwp) :: il !< |
|---|
| 1286 | INTEGER(iwp) :: ir !< |
|---|
| 1287 | INTEGER(iwp) :: j !< |
|---|
| 1288 | INTEGER(iwp) :: jn !< |
|---|
| 1289 | INTEGER(iwp) :: js !< |
|---|
| 1290 | INTEGER(iwp) :: k !< |
|---|
| 1291 | INTEGER(iwp) :: nwords !< |
|---|
| 1292 | |
|---|
| 1293 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
|---|
| 1294 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
|---|
| 1295 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: f2 !< |
|---|
| 1296 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
|---|
| 1297 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
|---|
| 1298 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: f2_l !< |
|---|
| 1299 | |
|---|
| 1300 | REAL(wp), DIMENSION(nzb:mg_loc_ind(5,myid)+1, & |
|---|
| 1301 | mg_loc_ind(3,myid)-1:mg_loc_ind(4,myid)+1, & |
|---|
| 1302 | mg_loc_ind(1,myid)-1:mg_loc_ind(2,myid)+1) :: f2_sub !< |
|---|
| 1303 | |
|---|
| 1304 | |
|---|
| 1305 | #if defined( __parallel ) |
|---|
| 1306 | CALL cpu_log( log_point_s(34), 'mg_gather', 'start' ) |
|---|
| 1307 | |
|---|
| 1308 | f2_l = 0.0_wp |
|---|
| 1309 | |
|---|
| 1310 | ! |
|---|
| 1311 | !-- Store the local subdomain array on the total array |
|---|
| 1312 | js = mg_loc_ind(3,myid) |
|---|
| 1313 | IF ( south_border_pe ) js = js - 1 |
|---|
| 1314 | jn = mg_loc_ind(4,myid) |
|---|
| 1315 | IF ( north_border_pe ) jn = jn + 1 |
|---|
| 1316 | il = mg_loc_ind(1,myid) |
|---|
| 1317 | IF ( left_border_pe ) il = il - 1 |
|---|
| 1318 | ir = mg_loc_ind(2,myid) |
|---|
| 1319 | IF ( right_border_pe ) ir = ir + 1 |
|---|
| 1320 | DO i = il, ir |
|---|
| 1321 | DO j = js, jn |
|---|
| 1322 | DO k = nzb, nzt_mg(grid_level)+1 |
|---|
| 1323 | f2_l(k,j,i) = f2_sub(k,j,i) |
|---|
| 1324 | ENDDO |
|---|
| 1325 | ENDDO |
|---|
| 1326 | ENDDO |
|---|
| 1327 | |
|---|
| 1328 | ! |
|---|
| 1329 | !-- Find out the number of array elements of the total array |
|---|
| 1330 | nwords = SIZE( f2 ) |
|---|
| 1331 | |
|---|
| 1332 | ! |
|---|
| 1333 | !-- Gather subdomain data from all PEs |
|---|
| 1334 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
|---|
| 1335 | CALL MPI_ALLREDUCE( f2_l(nzb,nys_mg(grid_level)-1,nxl_mg(grid_level)-1), & |
|---|
| 1336 | f2(nzb,nys_mg(grid_level)-1,nxl_mg(grid_level)-1), & |
|---|
| 1337 | nwords, MPI_REAL, MPI_SUM, comm2d, ierr ) |
|---|
| 1338 | |
|---|
| 1339 | CALL cpu_log( log_point_s(34), 'mg_gather', 'stop' ) |
|---|
| 1340 | #endif |
|---|
| 1341 | |
|---|
| 1342 | END SUBROUTINE mg_gather |
|---|
| 1343 | |
|---|
| 1344 | |
|---|
| 1345 | |
|---|
| 1346 | !------------------------------------------------------------------------------! |
|---|
| 1347 | ! Description: |
|---|
| 1348 | ! ------------ |
|---|
| 1349 | !> @todo It might be possible to improve the speed of this routine by using |
|---|
| 1350 | !> non-blocking communication |
|---|
| 1351 | !------------------------------------------------------------------------------! |
|---|
| 1352 | SUBROUTINE mg_scatter( p2, p2_sub ) |
|---|
| 1353 | |
|---|
| 1354 | USE control_parameters, & |
|---|
| 1355 | ONLY: grid_level |
|---|
| 1356 | |
|---|
| 1357 | USE cpulog, & |
|---|
| 1358 | ONLY: cpu_log, log_point_s |
|---|
| 1359 | |
|---|
| 1360 | USE indices, & |
|---|
| 1361 | ONLY: mg_loc_ind, nxl_mg, nxr_mg, nys_mg, nyn_mg, nzb, nzt_mg |
|---|
| 1362 | |
|---|
| 1363 | IMPLICIT NONE |
|---|
| 1364 | |
|---|
| 1365 | INTEGER(iwp) :: nwords !< |
|---|
| 1366 | |
|---|
| 1367 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level-1)+1, & |
|---|
| 1368 | nys_mg(grid_level-1)-1:nyn_mg(grid_level-1)+1, & |
|---|
| 1369 | nxl_mg(grid_level-1)-1:nxr_mg(grid_level-1)+1) :: p2 !< |
|---|
| 1370 | |
|---|
| 1371 | REAL(wp), DIMENSION(nzb:mg_loc_ind(5,myid)+1, & |
|---|
| 1372 | mg_loc_ind(3,myid)-1:mg_loc_ind(4,myid)+1, & |
|---|
| 1373 | mg_loc_ind(1,myid)-1:mg_loc_ind(2,myid)+1) :: p2_sub !< |
|---|
| 1374 | |
|---|
| 1375 | ! |
|---|
| 1376 | !-- Find out the number of array elements of the subdomain array |
|---|
| 1377 | nwords = SIZE( p2_sub ) |
|---|
| 1378 | |
|---|
| 1379 | #if defined( __parallel ) |
|---|
| 1380 | CALL cpu_log( log_point_s(35), 'mg_scatter', 'start' ) |
|---|
| 1381 | |
|---|
| 1382 | p2_sub = p2(:,mg_loc_ind(3,myid)-1:mg_loc_ind(4,myid)+1, & |
|---|
| 1383 | mg_loc_ind(1,myid)-1:mg_loc_ind(2,myid)+1) |
|---|
| 1384 | |
|---|
| 1385 | CALL cpu_log( log_point_s(35), 'mg_scatter', 'stop' ) |
|---|
| 1386 | #endif |
|---|
| 1387 | |
|---|
| 1388 | END SUBROUTINE mg_scatter |
|---|
| 1389 | |
|---|
| 1390 | |
|---|
| 1391 | !------------------------------------------------------------------------------! |
|---|
| 1392 | ! Description: |
|---|
| 1393 | ! ------------ |
|---|
| 1394 | !> This is where the multigrid technique takes place. V- and W- Cycle are |
|---|
| 1395 | !> implemented and steered by the parameter "gamma". Parameter "nue" determines |
|---|
| 1396 | !> the convergence of the multigrid iterative solution. There are nue times |
|---|
| 1397 | !> RB-GS iterations. It should be set to "1" or "2", considering the time effort |
|---|
| 1398 | !> one would like to invest. Last choice shows a very good converging factor, |
|---|
| 1399 | !> but leads to an increase in computing time. |
|---|
| 1400 | !------------------------------------------------------------------------------! |
|---|
| 1401 | RECURSIVE SUBROUTINE next_mg_level( f_mg, p_mg, p3, r ) |
|---|
| 1402 | |
|---|
| 1403 | USE control_parameters, & |
|---|
| 1404 | ONLY: bc_lr_dirrad, bc_lr_raddir, bc_ns_dirrad, bc_ns_raddir, & |
|---|
| 1405 | gamma_mg, grid_level_count, ibc_p_b, ibc_p_t, & |
|---|
| 1406 | maximum_grid_level, mg_switch_to_pe0_level, & |
|---|
| 1407 | mg_switch_to_pe0, nest_domain, ngsrb |
|---|
| 1408 | |
|---|
| 1409 | USE indices, & |
|---|
| 1410 | ONLY: mg_loc_ind, nxl, nxl_mg, nxr, nxr_mg, nys, nys_mg, nyn, & |
|---|
| 1411 | nyn_mg, nzb, nzt, nzt_mg |
|---|
| 1412 | |
|---|
| 1413 | IMPLICIT NONE |
|---|
| 1414 | |
|---|
| 1415 | INTEGER(iwp) :: i !< index variable along x |
|---|
| 1416 | INTEGER(iwp) :: j !< index variable along y |
|---|
| 1417 | INTEGER(iwp) :: k !< index variable along z |
|---|
| 1418 | INTEGER(iwp) :: nxl_mg_save !< |
|---|
| 1419 | INTEGER(iwp) :: nxr_mg_save !< |
|---|
| 1420 | INTEGER(iwp) :: nyn_mg_save !< |
|---|
| 1421 | INTEGER(iwp) :: nys_mg_save !< |
|---|
| 1422 | INTEGER(iwp) :: nzt_mg_save !< |
|---|
| 1423 | |
|---|
| 1424 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
|---|
| 1425 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
|---|
| 1426 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: f_mg !< |
|---|
| 1427 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
|---|
| 1428 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
|---|
| 1429 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: p_mg !< |
|---|
| 1430 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
|---|
| 1431 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
|---|
| 1432 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: p3 !< |
|---|
| 1433 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
|---|
| 1434 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
|---|
| 1435 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: r !< |
|---|
| 1436 | |
|---|
| 1437 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level-1)+1, & |
|---|
| 1438 | nys_mg(grid_level-1)-1:nyn_mg(grid_level-1)+1, & |
|---|
| 1439 | nxl_mg(grid_level-1)-1:nxr_mg(grid_level-1)+1) :: f2 !< |
|---|
| 1440 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level-1)+1, & |
|---|
| 1441 | nys_mg(grid_level-1)-1:nyn_mg(grid_level-1)+1, & |
|---|
| 1442 | nxl_mg(grid_level-1)-1:nxr_mg(grid_level-1)+1) :: p2 !< |
|---|
| 1443 | |
|---|
| 1444 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: f2_sub !< |
|---|
| 1445 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: p2_sub !< |
|---|
| 1446 | |
|---|
| 1447 | ! |
|---|
| 1448 | !-- Restriction to the coarsest grid |
|---|
| 1449 | 10 IF ( grid_level == 1 ) THEN |
|---|
| 1450 | |
|---|
| 1451 | ! |
|---|
| 1452 | !-- Solution on the coarsest grid. Double the number of Gauss-Seidel |
|---|
| 1453 | !-- iterations in order to get a more accurate solution. |
|---|
| 1454 | ngsrb = 2 * ngsrb |
|---|
| 1455 | |
|---|
| 1456 | ind_even_odd = even_odd_level(grid_level) |
|---|
| 1457 | |
|---|
| 1458 | CALL redblack( f_mg, p_mg ) |
|---|
| 1459 | |
|---|
| 1460 | ngsrb = ngsrb / 2 |
|---|
| 1461 | |
|---|
| 1462 | |
|---|
| 1463 | ELSEIF ( grid_level /= 1 ) THEN |
|---|
| 1464 | |
|---|
| 1465 | grid_level_count(grid_level) = grid_level_count(grid_level) + 1 |
|---|
| 1466 | |
|---|
| 1467 | ! |
|---|
| 1468 | !-- Solution on the actual grid level |
|---|
| 1469 | ind_even_odd = even_odd_level(grid_level) |
|---|
| 1470 | |
|---|
| 1471 | CALL redblack( f_mg, p_mg ) |
|---|
| 1472 | |
|---|
| 1473 | ! |
|---|
| 1474 | !-- Determination of the actual residual |
|---|
| 1475 | CALL resid( f_mg, p_mg, r ) |
|---|
| 1476 | |
|---|
| 1477 | !-- Restriction of the residual (finer grid values!) to the next coarser |
|---|
| 1478 | !-- grid. Therefore, the grid level has to be decremented now. nxl..nzt have |
|---|
| 1479 | !-- to be set to the coarse grid values, because these variables are needed |
|---|
| 1480 | !-- for the exchange of ghost points in routine exchange_horiz |
|---|
| 1481 | grid_level = grid_level - 1 |
|---|
| 1482 | |
|---|
| 1483 | nxl = nxl_mg(grid_level) |
|---|
| 1484 | nys = nys_mg(grid_level) |
|---|
| 1485 | nxr = nxr_mg(grid_level) |
|---|
| 1486 | nyn = nyn_mg(grid_level) |
|---|
| 1487 | nzt = nzt_mg(grid_level) |
|---|
| 1488 | |
|---|
| 1489 | IF ( grid_level == mg_switch_to_pe0_level ) THEN |
|---|
| 1490 | |
|---|
| 1491 | ! |
|---|
| 1492 | !-- From this level on, calculations are done on PE0 only. |
|---|
| 1493 | !-- First, carry out restriction on the subdomain. |
|---|
| 1494 | !-- Therefore, indices of the level have to be changed to subdomain |
|---|
| 1495 | !-- values in between (otherwise, the restrict routine would expect |
|---|
| 1496 | !-- the gathered array) |
|---|
| 1497 | |
|---|
| 1498 | nxl_mg_save = nxl_mg(grid_level) |
|---|
| 1499 | nxr_mg_save = nxr_mg(grid_level) |
|---|
| 1500 | nys_mg_save = nys_mg(grid_level) |
|---|
| 1501 | nyn_mg_save = nyn_mg(grid_level) |
|---|
| 1502 | nzt_mg_save = nzt_mg(grid_level) |
|---|
| 1503 | nxl_mg(grid_level) = mg_loc_ind(1,myid) |
|---|
| 1504 | nxr_mg(grid_level) = mg_loc_ind(2,myid) |
|---|
| 1505 | nys_mg(grid_level) = mg_loc_ind(3,myid) |
|---|
| 1506 | nyn_mg(grid_level) = mg_loc_ind(4,myid) |
|---|
| 1507 | nzt_mg(grid_level) = mg_loc_ind(5,myid) |
|---|
| 1508 | nxl = mg_loc_ind(1,myid) |
|---|
| 1509 | nxr = mg_loc_ind(2,myid) |
|---|
| 1510 | nys = mg_loc_ind(3,myid) |
|---|
| 1511 | nyn = mg_loc_ind(4,myid) |
|---|
| 1512 | nzt = mg_loc_ind(5,myid) |
|---|
| 1513 | |
|---|
| 1514 | ALLOCATE( f2_sub(nzb:nzt_mg(grid_level)+1, & |
|---|
| 1515 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
|---|
| 1516 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) ) |
|---|
| 1517 | |
|---|
| 1518 | CALL restrict( f2_sub, r ) |
|---|
| 1519 | |
|---|
| 1520 | ! |
|---|
| 1521 | !-- Restore the correct indices of this level |
|---|
| 1522 | nxl_mg(grid_level) = nxl_mg_save |
|---|
| 1523 | nxr_mg(grid_level) = nxr_mg_save |
|---|
| 1524 | nys_mg(grid_level) = nys_mg_save |
|---|
| 1525 | nyn_mg(grid_level) = nyn_mg_save |
|---|
| 1526 | nzt_mg(grid_level) = nzt_mg_save |
|---|
| 1527 | nxl = nxl_mg(grid_level) |
|---|
| 1528 | nxr = nxr_mg(grid_level) |
|---|
| 1529 | nys = nys_mg(grid_level) |
|---|
| 1530 | nyn = nyn_mg(grid_level) |
|---|
| 1531 | nzt = nzt_mg(grid_level) |
|---|
| 1532 | ! |
|---|
| 1533 | !-- Gather all arrays from the subdomains on PE0 |
|---|
| 1534 | CALL mg_gather( f2, f2_sub ) |
|---|
| 1535 | |
|---|
| 1536 | ! |
|---|
| 1537 | !-- Set switch for routine exchange_horiz, that no ghostpoint exchange |
|---|
| 1538 | !-- has to be carried out from now on |
|---|
| 1539 | mg_switch_to_pe0 = .TRUE. |
|---|
| 1540 | |
|---|
| 1541 | ! |
|---|
| 1542 | !-- In case of non-cyclic lateral boundary conditions, both in- and |
|---|
| 1543 | !-- outflow conditions have to be used on all PEs after the switch, |
|---|
| 1544 | !-- because then they have the total domain. |
|---|
| 1545 | IF ( bc_lr_dirrad ) THEN |
|---|
| 1546 | inflow_l = .TRUE. |
|---|
| 1547 | inflow_r = .FALSE. |
|---|
| 1548 | outflow_l = .FALSE. |
|---|
| 1549 | outflow_r = .TRUE. |
|---|
| 1550 | ELSEIF ( bc_lr_raddir ) THEN |
|---|
| 1551 | inflow_l = .FALSE. |
|---|
| 1552 | inflow_r = .TRUE. |
|---|
| 1553 | outflow_l = .TRUE. |
|---|
| 1554 | outflow_r = .FALSE. |
|---|
| 1555 | ELSEIF ( nest_domain ) THEN |
|---|
| 1556 | nest_bound_l = .TRUE. |
|---|
| 1557 | nest_bound_r = .TRUE. |
|---|
| 1558 | ELSEIF ( forcing ) THEN |
|---|
| 1559 | force_bound_l = .TRUE. |
|---|
| 1560 | force_bound_r = .TRUE. |
|---|
| 1561 | ENDIF |
|---|
| 1562 | |
|---|
| 1563 | IF ( bc_ns_dirrad ) THEN |
|---|
| 1564 | inflow_n = .TRUE. |
|---|
| 1565 | inflow_s = .FALSE. |
|---|
| 1566 | outflow_n = .FALSE. |
|---|
| 1567 | outflow_s = .TRUE. |
|---|
| 1568 | ELSEIF ( bc_ns_raddir ) THEN |
|---|
| 1569 | inflow_n = .FALSE. |
|---|
| 1570 | inflow_s = .TRUE. |
|---|
| 1571 | outflow_n = .TRUE. |
|---|
| 1572 | outflow_s = .FALSE. |
|---|
| 1573 | ELSEIF ( nest_domain ) THEN |
|---|
| 1574 | nest_bound_s = .TRUE. |
|---|
| 1575 | nest_bound_n = .TRUE. |
|---|
| 1576 | ELSEIF ( forcing ) THEN |
|---|
| 1577 | force_bound_s = .TRUE. |
|---|
| 1578 | force_bound_n = .TRUE. |
|---|
| 1579 | ENDIF |
|---|
| 1580 | |
|---|
| 1581 | DEALLOCATE( f2_sub ) |
|---|
| 1582 | |
|---|
| 1583 | ELSE |
|---|
| 1584 | |
|---|
| 1585 | CALL restrict( f2, r ) |
|---|
| 1586 | |
|---|
| 1587 | ind_even_odd = even_odd_level(grid_level) ! must be after restrict |
|---|
| 1588 | |
|---|
| 1589 | ENDIF |
|---|
| 1590 | |
|---|
| 1591 | p2 = 0.0_wp |
|---|
| 1592 | |
|---|
| 1593 | ! |
|---|
| 1594 | !-- Repeat the same procedure till the coarsest grid is reached |
|---|
| 1595 | CALL next_mg_level( f2, p2, p3, r ) |
|---|
| 1596 | |
|---|
| 1597 | ENDIF |
|---|
| 1598 | |
|---|
| 1599 | ! |
|---|
| 1600 | !-- Now follows the prolongation |
|---|
| 1601 | IF ( grid_level >= 2 ) THEN |
|---|
| 1602 | |
|---|
| 1603 | ! |
|---|
| 1604 | !-- Prolongation of the new residual. The values are transferred |
|---|
| 1605 | !-- from the coarse to the next finer grid. |
|---|
| 1606 | IF ( grid_level == mg_switch_to_pe0_level+1 ) THEN |
|---|
| 1607 | |
|---|
| 1608 | #if defined( __parallel ) |
|---|
| 1609 | ! |
|---|
| 1610 | !-- At this level, the new residual first has to be scattered from |
|---|
| 1611 | !-- PE0 to the other PEs |
|---|
| 1612 | ALLOCATE( p2_sub(nzb:mg_loc_ind(5,myid)+1, & |
|---|
| 1613 | mg_loc_ind(3,myid)-1:mg_loc_ind(4,myid)+1, & |
|---|
| 1614 | mg_loc_ind(1,myid)-1:mg_loc_ind(2,myid)+1) ) |
|---|
| 1615 | |
|---|
| 1616 | CALL mg_scatter( p2, p2_sub ) |
|---|
| 1617 | |
|---|
| 1618 | ! |
|---|
| 1619 | !-- Therefore, indices of the previous level have to be changed to |
|---|
| 1620 | !-- subdomain values in between (otherwise, the prolong routine would |
|---|
| 1621 | !-- expect the gathered array) |
|---|
| 1622 | nxl_mg_save = nxl_mg(grid_level-1) |
|---|
| 1623 | nxr_mg_save = nxr_mg(grid_level-1) |
|---|
| 1624 | nys_mg_save = nys_mg(grid_level-1) |
|---|
| 1625 | nyn_mg_save = nyn_mg(grid_level-1) |
|---|
| 1626 | nzt_mg_save = nzt_mg(grid_level-1) |
|---|
| 1627 | nxl_mg(grid_level-1) = mg_loc_ind(1,myid) |
|---|
| 1628 | nxr_mg(grid_level-1) = mg_loc_ind(2,myid) |
|---|
| 1629 | nys_mg(grid_level-1) = mg_loc_ind(3,myid) |
|---|
| 1630 | nyn_mg(grid_level-1) = mg_loc_ind(4,myid) |
|---|
| 1631 | nzt_mg(grid_level-1) = mg_loc_ind(5,myid) |
|---|
| 1632 | |
|---|
| 1633 | ! |
|---|
| 1634 | !-- Set switch for routine exchange_horiz, that ghostpoint exchange |
|---|
| 1635 | !-- has to be carried again out from now on |
|---|
| 1636 | mg_switch_to_pe0 = .FALSE. |
|---|
| 1637 | |
|---|
| 1638 | ! |
|---|
| 1639 | !-- For non-cyclic lateral boundary conditions and in case of nesting, |
|---|
| 1640 | !-- restore the in-/outflow conditions. |
|---|
| 1641 | inflow_l = .FALSE.; inflow_r = .FALSE. |
|---|
| 1642 | inflow_n = .FALSE.; inflow_s = .FALSE. |
|---|
| 1643 | outflow_l = .FALSE.; outflow_r = .FALSE. |
|---|
| 1644 | outflow_n = .FALSE.; outflow_s = .FALSE. |
|---|
| 1645 | ! |
|---|
| 1646 | !-- In case of nesting or forcing, restore lateral boundary conditions |
|---|
| 1647 | IF ( nest_domain ) THEN |
|---|
| 1648 | nest_bound_l = .FALSE. |
|---|
| 1649 | nest_bound_r = .FALSE. |
|---|
| 1650 | nest_bound_s = .FALSE. |
|---|
| 1651 | nest_bound_n = .FALSE. |
|---|
| 1652 | ENDIF |
|---|
| 1653 | IF ( forcing ) THEN |
|---|
| 1654 | force_bound_l = .FALSE. |
|---|
| 1655 | force_bound_r = .FALSE. |
|---|
| 1656 | force_bound_s = .FALSE. |
|---|
| 1657 | force_bound_n = .FALSE. |
|---|
| 1658 | ENDIF |
|---|
| 1659 | |
|---|
| 1660 | IF ( pleft == MPI_PROC_NULL ) THEN |
|---|
| 1661 | IF ( bc_lr_dirrad ) THEN |
|---|
| 1662 | inflow_l = .TRUE. |
|---|
| 1663 | ELSEIF ( bc_lr_raddir ) THEN |
|---|
| 1664 | outflow_l = .TRUE. |
|---|
| 1665 | ELSEIF ( nest_domain ) THEN |
|---|
| 1666 | nest_bound_l = .TRUE. |
|---|
| 1667 | ELSEIF ( forcing ) THEN |
|---|
| 1668 | force_bound_l = .TRUE. |
|---|
| 1669 | ENDIF |
|---|
| 1670 | ENDIF |
|---|
| 1671 | |
|---|
| 1672 | IF ( pright == MPI_PROC_NULL ) THEN |
|---|
| 1673 | IF ( bc_lr_dirrad ) THEN |
|---|
| 1674 | outflow_r = .TRUE. |
|---|
| 1675 | ELSEIF ( bc_lr_raddir ) THEN |
|---|
| 1676 | inflow_r = .TRUE. |
|---|
| 1677 | ELSEIF ( nest_domain ) THEN |
|---|
| 1678 | nest_bound_r = .TRUE. |
|---|
| 1679 | ELSEIF ( forcing ) THEN |
|---|
| 1680 | force_bound_r = .TRUE. |
|---|
| 1681 | ENDIF |
|---|
| 1682 | ENDIF |
|---|
| 1683 | |
|---|
| 1684 | IF ( psouth == MPI_PROC_NULL ) THEN |
|---|
| 1685 | IF ( bc_ns_dirrad ) THEN |
|---|
| 1686 | outflow_s = .TRUE. |
|---|
| 1687 | ELSEIF ( bc_ns_raddir ) THEN |
|---|
| 1688 | inflow_s = .TRUE. |
|---|
| 1689 | ELSEIF ( nest_domain ) THEN |
|---|
| 1690 | nest_bound_s = .TRUE. |
|---|
| 1691 | ELSEIF ( forcing ) THEN |
|---|
| 1692 | force_bound_s = .TRUE. |
|---|
| 1693 | ENDIF |
|---|
| 1694 | ENDIF |
|---|
| 1695 | |
|---|
| 1696 | IF ( pnorth == MPI_PROC_NULL ) THEN |
|---|
| 1697 | IF ( bc_ns_dirrad ) THEN |
|---|
| 1698 | inflow_n = .TRUE. |
|---|
| 1699 | ELSEIF ( bc_ns_raddir ) THEN |
|---|
| 1700 | outflow_n = .TRUE. |
|---|
| 1701 | ELSEIF ( nest_domain ) THEN |
|---|
| 1702 | nest_bound_n = .TRUE. |
|---|
| 1703 | ELSEIF ( forcing ) THEN |
|---|
| 1704 | force_bound_n = .TRUE. |
|---|
| 1705 | ENDIF |
|---|
| 1706 | ENDIF |
|---|
| 1707 | |
|---|
| 1708 | CALL prolong( p2_sub, p3 ) |
|---|
| 1709 | |
|---|
| 1710 | ! |
|---|
| 1711 | !-- Restore the correct indices of the previous level |
|---|
| 1712 | nxl_mg(grid_level-1) = nxl_mg_save |
|---|
| 1713 | nxr_mg(grid_level-1) = nxr_mg_save |
|---|
| 1714 | nys_mg(grid_level-1) = nys_mg_save |
|---|
| 1715 | nyn_mg(grid_level-1) = nyn_mg_save |
|---|
| 1716 | nzt_mg(grid_level-1) = nzt_mg_save |
|---|
| 1717 | |
|---|
| 1718 | DEALLOCATE( p2_sub ) |
|---|
| 1719 | #endif |
|---|
| 1720 | |
|---|
| 1721 | ELSE |
|---|
| 1722 | |
|---|
| 1723 | CALL prolong( p2, p3 ) |
|---|
| 1724 | |
|---|
| 1725 | ENDIF |
|---|
| 1726 | |
|---|
| 1727 | ! |
|---|
| 1728 | !-- Computation of the new pressure correction. Therefore, |
|---|
| 1729 | !-- values from prior grids are added up automatically stage by stage. |
|---|
| 1730 | DO i = nxl_mg(grid_level)-1, nxr_mg(grid_level)+1 |
|---|
| 1731 | DO j = nys_mg(grid_level)-1, nyn_mg(grid_level)+1 |
|---|
| 1732 | DO k = nzb, nzt_mg(grid_level)+1 |
|---|
| 1733 | p_mg(k,j,i) = p_mg(k,j,i) + p3(k,j,i) |
|---|
| 1734 | ENDDO |
|---|
| 1735 | ENDDO |
|---|
| 1736 | ENDDO |
|---|
| 1737 | |
|---|
| 1738 | ! |
|---|
| 1739 | !-- Relaxation of the new solution |
|---|
| 1740 | CALL redblack( f_mg, p_mg ) |
|---|
| 1741 | |
|---|
| 1742 | ENDIF |
|---|
| 1743 | |
|---|
| 1744 | |
|---|
| 1745 | ! |
|---|
| 1746 | !-- The following few lines serve the steering of the multigrid scheme |
|---|
| 1747 | IF ( grid_level == maximum_grid_level ) THEN |
|---|
| 1748 | |
|---|
| 1749 | GOTO 20 |
|---|
| 1750 | |
|---|
| 1751 | ELSEIF ( grid_level /= maximum_grid_level .AND. grid_level /= 1 .AND. & |
|---|
| 1752 | grid_level_count(grid_level) /= gamma_mg ) THEN |
|---|
| 1753 | |
|---|
| 1754 | GOTO 10 |
|---|
| 1755 | |
|---|
| 1756 | ENDIF |
|---|
| 1757 | |
|---|
| 1758 | ! |
|---|
| 1759 | !-- Reset counter for the next call of poismg |
|---|
| 1760 | grid_level_count(grid_level) = 0 |
|---|
| 1761 | |
|---|
| 1762 | ! |
|---|
| 1763 | !-- Continue with the next finer level. nxl..nzt have to be |
|---|
| 1764 | !-- set to the finer grid values, because these variables are needed for the |
|---|
| 1765 | !-- exchange of ghost points in routine exchange_horiz |
|---|
| 1766 | grid_level = grid_level + 1 |
|---|
| 1767 | ind_even_odd = even_odd_level(grid_level) |
|---|
| 1768 | |
|---|
| 1769 | nxl = nxl_mg(grid_level) |
|---|
| 1770 | nxr = nxr_mg(grid_level) |
|---|
| 1771 | nys = nys_mg(grid_level) |
|---|
| 1772 | nyn = nyn_mg(grid_level) |
|---|
| 1773 | nzt = nzt_mg(grid_level) |
|---|
| 1774 | |
|---|
| 1775 | 20 CONTINUE |
|---|
| 1776 | |
|---|
| 1777 | END SUBROUTINE next_mg_level |
|---|
| 1778 | |
|---|
| 1779 | |
|---|
| 1780 | !------------------------------------------------------------------------------! |
|---|
| 1781 | ! Description: |
|---|
| 1782 | ! ------------ |
|---|
| 1783 | !> Initial settings for sorting k-dimension from sequential order (alternate |
|---|
| 1784 | !> even/odd) into blocks of even and odd or vice versa |
|---|
| 1785 | !------------------------------------------------------------------------------! |
|---|
| 1786 | SUBROUTINE init_even_odd_blocks |
|---|
| 1787 | |
|---|
| 1788 | |
|---|
| 1789 | USE arrays_3d, & |
|---|
| 1790 | ONLY: f1_mg, f2_mg, f3_mg |
|---|
| 1791 | |
|---|
| 1792 | USE control_parameters, & |
|---|
| 1793 | ONLY: grid_level, maximum_grid_level |
|---|
| 1794 | |
|---|
| 1795 | USE indices, & |
|---|
| 1796 | ONLY: nzb, nzt, nzt_mg |
|---|
| 1797 | |
|---|
| 1798 | USE indices, & |
|---|
| 1799 | ONLY: nxl_mg, nxr_mg, nys_mg, nyn_mg, nzb, nzt_mg |
|---|
| 1800 | |
|---|
| 1801 | IMPLICIT NONE |
|---|
| 1802 | ! |
|---|
| 1803 | !-- Local variables |
|---|
| 1804 | INTEGER(iwp) :: i !< |
|---|
| 1805 | INTEGER(iwp) :: l !< |
|---|
| 1806 | |
|---|
| 1807 | LOGICAL, SAVE :: lfirst = .TRUE. |
|---|
| 1808 | |
|---|
| 1809 | |
|---|
| 1810 | IF ( .NOT. lfirst ) RETURN |
|---|
| 1811 | |
|---|
| 1812 | ALLOCATE( even_odd_level(maximum_grid_level) ) |
|---|
| 1813 | |
|---|
| 1814 | ALLOCATE( f1_mg_b(nzb:nzt+1,maximum_grid_level), & |
|---|
| 1815 | f2_mg_b(nzb:nzt+1,maximum_grid_level), & |
|---|
| 1816 | f3_mg_b(nzb:nzt+1,maximum_grid_level) ) |
|---|
| 1817 | |
|---|
| 1818 | ! |
|---|
| 1819 | !-- Set border index between the even and odd block |
|---|
| 1820 | DO i = maximum_grid_level, 1, -1 |
|---|
| 1821 | even_odd_level(i) = nzt_mg(i) / 2 |
|---|
| 1822 | ENDDO |
|---|
| 1823 | |
|---|
| 1824 | ! |
|---|
| 1825 | !-- Sort grid coefficients used in red/black scheme and for calculating the |
|---|
| 1826 | !-- residual to block (even/odd) structure |
|---|
| 1827 | DO l = maximum_grid_level, 1 , -1 |
|---|
| 1828 | CALL sort_k_to_even_odd_blocks( f1_mg(nzb+1:nzt_mg(grid_level),l), & |
|---|
| 1829 | f1_mg_b(nzb:nzt_mg(grid_level)+1,l), & |
|---|
| 1830 | l ) |
|---|
| 1831 | CALL sort_k_to_even_odd_blocks( f2_mg(nzb+1:nzt_mg(grid_level),l), & |
|---|
| 1832 | f2_mg_b(nzb:nzt_mg(grid_level)+1,l), & |
|---|
| 1833 | l ) |
|---|
| 1834 | CALL sort_k_to_even_odd_blocks( f3_mg(nzb+1:nzt_mg(grid_level),l), & |
|---|
| 1835 | f3_mg_b(nzb:nzt_mg(grid_level)+1,l), & |
|---|
| 1836 | l ) |
|---|
| 1837 | ENDDO |
|---|
| 1838 | |
|---|
| 1839 | lfirst = .FALSE. |
|---|
| 1840 | |
|---|
| 1841 | END SUBROUTINE init_even_odd_blocks |
|---|
| 1842 | |
|---|
| 1843 | |
|---|
| 1844 | !------------------------------------------------------------------------------! |
|---|
| 1845 | ! Description: |
|---|
| 1846 | ! ------------ |
|---|
| 1847 | !> Special exchange_horiz subroutine for use in redblack. Transfers only |
|---|
| 1848 | !> "red" or "black" data points. |
|---|
| 1849 | !------------------------------------------------------------------------------! |
|---|
| 1850 | SUBROUTINE special_exchange_horiz ( p_mg, color ) |
|---|
| 1851 | |
|---|
| 1852 | |
|---|
| 1853 | USE control_parameters, & |
|---|
| 1854 | ONLY: bc_lr_cyc, bc_ns_cyc, grid_level, ibc_p_b, ibc_p_t, & |
|---|
| 1855 | maximum_grid_level, & |
|---|
| 1856 | mg_switch_to_pe0_level, synchronous_exchange |
|---|
| 1857 | |
|---|
| 1858 | USE indices, & |
|---|
| 1859 | ONLY: mg_loc_ind, nxl, nxl_mg, nxr, nxr_mg, nys, nys_mg, nyn, & |
|---|
| 1860 | nyn_mg, nzb, nzt, nzt_mg |
|---|
| 1861 | |
|---|
| 1862 | IMPLICIT NONE |
|---|
| 1863 | |
|---|
| 1864 | REAL(wp), DIMENSION(nzb:nzt_mg(grid_level)+1, & |
|---|
| 1865 | nys_mg(grid_level)-1:nyn_mg(grid_level)+1, & |
|---|
| 1866 | nxl_mg(grid_level)-1:nxr_mg(grid_level)+1) :: & |
|---|
| 1867 | p_mg !< treated array |
|---|
| 1868 | |
|---|
| 1869 | INTEGER(iwp), intent(IN) :: color !< flag for grid point type (red or black) |
|---|
| 1870 | ! |
|---|
| 1871 | !-- Local variables |
|---|
| 1872 | INTEGER(iwp) :: i !< index variable along x |
|---|
| 1873 | INTEGER(iwp) :: i1 !< index variable along x on coarse level |
|---|
| 1874 | INTEGER(iwp) :: i2 !< index variable along x on coarse level |
|---|
| 1875 | |
|---|
| 1876 | INTEGER(iwp) :: j !< index variable along y |
|---|
| 1877 | INTEGER(iwp) :: j1 !< index variable along y on coarse level |
|---|
| 1878 | INTEGER(iwp) :: j2 !< index variable along y on coarse level |
|---|
| 1879 | INTEGER(iwp) :: k !< index variable along z |
|---|
| 1880 | INTEGER(iwp) :: l !< short for grid level |
|---|
| 1881 | INTEGER(iwp) :: jys !< index for lower local PE boundary along y |
|---|
| 1882 | INTEGER(iwp) :: jyn !< index for upper local PE boundary along y |
|---|
| 1883 | INTEGER(iwp) :: ixl !< index for lower local PE boundary along x |
|---|
| 1884 | INTEGER(iwp) :: ixr !< index for upper local PE boundary along x |
|---|
| 1885 | |
|---|
| 1886 | LOGICAL :: synchronous_exchange_save !< dummy to reset synchronous_exchange to prescribed value |
|---|
| 1887 | |
|---|
| 1888 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: temp !< temporary array on next coarser grid level |
|---|
| 1889 | |
|---|
| 1890 | #if defined ( __parallel ) |
|---|
| 1891 | synchronous_exchange_save = synchronous_exchange |
|---|
| 1892 | synchronous_exchange = .FALSE. |
|---|
| 1893 | |
|---|
| 1894 | l = grid_level |
|---|
| 1895 | |
|---|
| 1896 | ind_even_odd = even_odd_level(grid_level) |
|---|
| 1897 | |
|---|
| 1898 | ! |
|---|
| 1899 | !-- Restricted transfer only on finer levels with enough data. |
|---|
| 1900 | !-- Restricted transfer is not possible for levels smaller or equal to |
|---|
| 1901 | !-- 'switch to PE0 levels', since array bounds does not fit. Moreover, |
|---|
| 1902 | !-- it is not possible for the coarsest grid level, since the dimensions |
|---|
| 1903 | !-- of temp are not defined. For such cases, normal exchange_horiz is called. |
|---|
| 1904 | IF ( l > 1 .AND. l > mg_switch_to_pe0_level + 1 .AND. & |
|---|
| 1905 | ( ngp_xz(grid_level) >= 900 .OR. ngp_yz(grid_level) >= 900 ) ) THEN |
|---|
| 1906 | |
|---|
| 1907 | jys = nys_mg(grid_level-1) |
|---|
| 1908 | jyn = nyn_mg(grid_level-1) |
|---|
| 1909 | ixl = nxl_mg(grid_level-1) |
|---|
| 1910 | ixr = nxr_mg(grid_level-1) |
|---|
| 1911 | ALLOCATE( temp(nzb:nzt_mg(l-1)+1,jys-1:jyn+1,ixl-1:ixr+1) ) |
|---|
| 1912 | ! |
|---|
| 1913 | !-- Handling the even k Values |
|---|
| 1914 | !-- Collecting data for the north - south exchange |
|---|
| 1915 | !-- Since only every second value has to be transfered, data are stored |
|---|
| 1916 | !-- on the next coarser grid level, because the arrays on that level |
|---|
| 1917 | !-- have just the required size |
|---|
| 1918 | i1 = nxl_mg(grid_level-1) |
|---|
| 1919 | i2 = nxl_mg(grid_level-1) |
|---|
| 1920 | |
|---|
| 1921 | DO i = nxl_mg(l), nxr_mg(l), 2 |
|---|
| 1922 | DO j = nys_mg(l) + 2 - color, nyn_mg(l), 2 |
|---|
| 1923 | |
|---|
| 1924 | IF ( j == nys_mg(l) ) THEN |
|---|
| 1925 | !DIR$ IVDEP |
|---|
| 1926 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 1927 | temp(k-ind_even_odd,jys,i1) = p_mg(k,j,i) |
|---|
| 1928 | ENDDO |
|---|
| 1929 | i1 = i1 + 1 |
|---|
| 1930 | |
|---|
| 1931 | ENDIF |
|---|
| 1932 | |
|---|
| 1933 | IF ( j == nyn_mg(l) ) THEN |
|---|
| 1934 | !DIR$ IVDEP |
|---|
| 1935 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 1936 | temp(k-ind_even_odd,jyn,i2) = p_mg(k,j,i) |
|---|
| 1937 | ENDDO |
|---|
| 1938 | i2 = i2 + 1 |
|---|
| 1939 | |
|---|
| 1940 | ENDIF |
|---|
| 1941 | |
|---|
| 1942 | ENDDO |
|---|
| 1943 | ENDDO |
|---|
| 1944 | |
|---|
| 1945 | DO i = nxl_mg(l)+1, nxr_mg(l), 2 |
|---|
| 1946 | DO j = nys_mg(l) + (color-1), nyn_mg(l), 2 |
|---|
| 1947 | |
|---|
| 1948 | IF ( j == nys_mg(l) ) THEN |
|---|
| 1949 | !DIR$ IVDEP |
|---|
| 1950 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 1951 | temp(k-ind_even_odd,jys,i1) = p_mg(k,j,i) |
|---|
| 1952 | ENDDO |
|---|
| 1953 | i1 = i1 + 1 |
|---|
| 1954 | |
|---|
| 1955 | ENDIF |
|---|
| 1956 | |
|---|
| 1957 | IF ( j == nyn_mg(l) ) THEN |
|---|
| 1958 | !DIR$ IVDEP |
|---|
| 1959 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 1960 | temp(k-ind_even_odd,jyn,i2) = p_mg(k,j,i) |
|---|
| 1961 | ENDDO |
|---|
| 1962 | i2 = i2 + 1 |
|---|
| 1963 | |
|---|
| 1964 | ENDIF |
|---|
| 1965 | |
|---|
| 1966 | ENDDO |
|---|
| 1967 | ENDDO |
|---|
| 1968 | |
|---|
| 1969 | grid_level = grid_level-1 |
|---|
| 1970 | |
|---|
| 1971 | nxl = nxl_mg(grid_level) |
|---|
| 1972 | nys = nys_mg(grid_level) |
|---|
| 1973 | nxr = nxr_mg(grid_level) |
|---|
| 1974 | nyn = nyn_mg(grid_level) |
|---|
| 1975 | nzt = nzt_mg(grid_level) |
|---|
| 1976 | |
|---|
| 1977 | send_receive = 'ns' |
|---|
| 1978 | CALL exchange_horiz( temp, 1 ) |
|---|
| 1979 | |
|---|
| 1980 | grid_level = grid_level+1 |
|---|
| 1981 | |
|---|
| 1982 | i1 = nxl_mg(grid_level-1) |
|---|
| 1983 | i2 = nxl_mg(grid_level-1) |
|---|
| 1984 | |
|---|
| 1985 | DO i = nxl_mg(l), nxr_mg(l), 2 |
|---|
| 1986 | DO j = nys_mg(l) + 2 - color, nyn_mg(l), 2 |
|---|
| 1987 | |
|---|
| 1988 | IF ( j == nys_mg(l) ) THEN |
|---|
| 1989 | !DIR$ IVDEP |
|---|
| 1990 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 1991 | p_mg(k,nyn_mg(l)+1,i) = temp(k-ind_even_odd,jyn+1,i1) |
|---|
| 1992 | ENDDO |
|---|
| 1993 | i1 = i1 + 1 |
|---|
| 1994 | |
|---|
| 1995 | ENDIF |
|---|
| 1996 | |
|---|
| 1997 | IF ( j == nyn_mg(l) ) THEN |
|---|
| 1998 | !DIR$ IVDEP |
|---|
| 1999 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 2000 | p_mg(k,nys_mg(l)-1,i) = temp(k-ind_even_odd,jys-1,i2) |
|---|
| 2001 | ENDDO |
|---|
| 2002 | i2 = i2 + 1 |
|---|
| 2003 | |
|---|
| 2004 | ENDIF |
|---|
| 2005 | |
|---|
| 2006 | ENDDO |
|---|
| 2007 | ENDDO |
|---|
| 2008 | |
|---|
| 2009 | DO i = nxl_mg(l)+1, nxr_mg(l), 2 |
|---|
| 2010 | DO j = nys_mg(l) + (color-1), nyn_mg(l), 2 |
|---|
| 2011 | |
|---|
| 2012 | IF ( j == nys_mg(l) ) THEN |
|---|
| 2013 | !DIR$ IVDEP |
|---|
| 2014 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 2015 | p_mg(k,nyn_mg(l)+1,i) = temp(k-ind_even_odd,jyn+1,i1) |
|---|
| 2016 | ENDDO |
|---|
| 2017 | i1 = i1 + 1 |
|---|
| 2018 | |
|---|
| 2019 | ENDIF |
|---|
| 2020 | |
|---|
| 2021 | IF ( j == nyn_mg(l) ) THEN |
|---|
| 2022 | !DIR$ IVDEP |
|---|
| 2023 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 2024 | p_mg(k,nys_mg(l)-1,i) = temp(k-ind_even_odd,jys-1,i2) |
|---|
| 2025 | ENDDO |
|---|
| 2026 | i2 = i2 + 1 |
|---|
| 2027 | |
|---|
| 2028 | ENDIF |
|---|
| 2029 | |
|---|
| 2030 | ENDDO |
|---|
| 2031 | ENDDO |
|---|
| 2032 | |
|---|
| 2033 | ! |
|---|
| 2034 | !-- Collecting data for the left - right exchange |
|---|
| 2035 | !-- Since only every second value has to be transfered, data are stored |
|---|
| 2036 | !-- on the next coarser grid level, because the arrays on that level |
|---|
| 2037 | !-- have just the required size |
|---|
| 2038 | j1 = nys_mg(grid_level-1) |
|---|
| 2039 | j2 = nys_mg(grid_level-1) |
|---|
| 2040 | |
|---|
| 2041 | DO j = nys_mg(l) + 2 - color, nyn_mg(l), 2 |
|---|
| 2042 | DO i = nxl_mg(l), nxr_mg(l), 2 |
|---|
| 2043 | |
|---|
| 2044 | IF ( i == nxl_mg(l) ) THEN |
|---|
| 2045 | !DIR$ IVDEP |
|---|
| 2046 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 2047 | temp(k-ind_even_odd,j1,ixl) = p_mg(k,j,i) |
|---|
| 2048 | ENDDO |
|---|
| 2049 | j1 = j1 + 1 |
|---|
| 2050 | |
|---|
| 2051 | ENDIF |
|---|
| 2052 | |
|---|
| 2053 | IF ( i == nxr_mg(l) ) THEN |
|---|
| 2054 | !DIR$ IVDEP |
|---|
| 2055 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 2056 | temp(k-ind_even_odd,j2,ixr) = p_mg(k,j,i) |
|---|
| 2057 | ENDDO |
|---|
| 2058 | j2 = j2 + 1 |
|---|
| 2059 | |
|---|
| 2060 | ENDIF |
|---|
| 2061 | |
|---|
| 2062 | ENDDO |
|---|
| 2063 | ENDDO |
|---|
| 2064 | |
|---|
| 2065 | DO j = nys_mg(l) + (color-1), nyn_mg(l), 2 |
|---|
| 2066 | DO i = nxl_mg(l)+1, nxr_mg(l), 2 |
|---|
| 2067 | |
|---|
| 2068 | IF ( i == nxl_mg(l) ) THEN |
|---|
| 2069 | !DIR$ IVDEP |
|---|
| 2070 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 2071 | temp(k-ind_even_odd,j1,ixl) = p_mg(k,j,i) |
|---|
| 2072 | ENDDO |
|---|
| 2073 | j1 = j1 + 1 |
|---|
| 2074 | |
|---|
| 2075 | ENDIF |
|---|
| 2076 | |
|---|
| 2077 | IF ( i == nxr_mg(l) ) THEN |
|---|
| 2078 | !DIR$ IVDEP |
|---|
| 2079 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 2080 | temp(k-ind_even_odd,j2,ixr) = p_mg(k,j,i) |
|---|
| 2081 | ENDDO |
|---|
| 2082 | j2 = j2 + 1 |
|---|
| 2083 | |
|---|
| 2084 | ENDIF |
|---|
| 2085 | |
|---|
| 2086 | ENDDO |
|---|
| 2087 | ENDDO |
|---|
| 2088 | |
|---|
| 2089 | grid_level = grid_level-1 |
|---|
| 2090 | send_receive = 'lr' |
|---|
| 2091 | |
|---|
| 2092 | CALL exchange_horiz( temp, 1 ) |
|---|
| 2093 | |
|---|
| 2094 | grid_level = grid_level+1 |
|---|
| 2095 | |
|---|
| 2096 | j1 = nys_mg(grid_level-1) |
|---|
| 2097 | j2 = nys_mg(grid_level-1) |
|---|
| 2098 | |
|---|
| 2099 | DO j = nys_mg(l) + 2 - color, nyn_mg(l), 2 |
|---|
| 2100 | DO i = nxl_mg(l), nxr_mg(l), 2 |
|---|
| 2101 | |
|---|
| 2102 | IF ( i == nxl_mg(l) ) THEN |
|---|
| 2103 | !DIR$ IVDEP |
|---|
| 2104 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 2105 | p_mg(k,j,nxr_mg(l)+1) = temp(k-ind_even_odd,j1,ixr+1) |
|---|
| 2106 | ENDDO |
|---|
| 2107 | j1 = j1 + 1 |
|---|
| 2108 | |
|---|
| 2109 | ENDIF |
|---|
| 2110 | |
|---|
| 2111 | IF ( i == nxr_mg(l) ) THEN |
|---|
| 2112 | !DIR$ IVDEP |
|---|
| 2113 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 2114 | p_mg(k,j,nxl_mg(l)-1) = temp(k-ind_even_odd,j2,ixl-1) |
|---|
| 2115 | ENDDO |
|---|
| 2116 | j2 = j2 + 1 |
|---|
| 2117 | |
|---|
| 2118 | ENDIF |
|---|
| 2119 | |
|---|
| 2120 | ENDDO |
|---|
| 2121 | ENDDO |
|---|
| 2122 | |
|---|
| 2123 | DO j = nys_mg(l) + (color-1), nyn_mg(l), 2 |
|---|
| 2124 | DO i = nxl_mg(l)+1, nxr_mg(l), 2 |
|---|
| 2125 | |
|---|
| 2126 | IF ( i == nxl_mg(l) ) THEN |
|---|
| 2127 | !DIR$ IVDEP |
|---|
| 2128 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 2129 | p_mg(k,j,nxr_mg(l)+1) = temp(k-ind_even_odd,j1,ixr+1) |
|---|
| 2130 | ENDDO |
|---|
| 2131 | j1 = j1 + 1 |
|---|
| 2132 | |
|---|
| 2133 | ENDIF |
|---|
| 2134 | |
|---|
| 2135 | IF ( i == nxr_mg(l) ) THEN |
|---|
| 2136 | !DIR$ IVDEP |
|---|
| 2137 | DO k = ind_even_odd+1, nzt_mg(l) |
|---|
| 2138 | p_mg(k,j,nxl_mg(l)-1) = temp(k-ind_even_odd,j2,ixl-1) |
|---|
| 2139 | ENDDO |
|---|
| 2140 | j2 = j2 + 1 |
|---|
| 2141 | |
|---|
| 2142 | ENDIF |
|---|
| 2143 | |
|---|
| 2144 | ENDDO |
|---|
| 2145 | ENDDO |
|---|
| 2146 | |
|---|
| 2147 | ! |
|---|
| 2148 | !-- Now handling the even k values |
|---|
| 2149 | !-- Collecting data for the north - south exchange |
|---|
| 2150 | !-- Since only every second value has to be transfered, data are stored |
|---|
| 2151 | !-- on the next coarser grid level, because the arrays on that level |
|---|
| 2152 | !-- have just the required size |
|---|
| 2153 | i1 = nxl_mg(grid_level-1) |
|---|
| 2154 | i2 = nxl_mg(grid_level-1) |
|---|
| 2155 | |
|---|
| 2156 | DO i = nxl_mg(l), nxr_mg(l), 2 |
|---|
| 2157 | DO j = nys_mg(l) + (color-1), nyn_mg(l), 2 |
|---|
| 2158 | |
|---|
| 2159 | IF ( j == nys_mg(l) ) THEN |
|---|
| 2160 | !DIR$ IVDEP |
|---|
| 2161 | DO k = nzb+1, ind_even_odd |
|---|
| 2162 | temp(k,jys,i1) = p_mg(k,j,i) |
|---|
| 2163 | ENDDO |
|---|
| 2164 | i1 = i1 + 1 |
|---|
| 2165 | |
|---|
| 2166 | ENDIF |
|---|
| 2167 | |
|---|
| 2168 | IF ( j == nyn_mg(l) ) THEN |
|---|
| 2169 | !DIR$ IVDEP |
|---|
| 2170 | DO k = nzb+1, ind_even_odd |
|---|
| 2171 | temp(k,jyn,i2) = p_mg(k,j,i) |
|---|
| 2172 | ENDDO |
|---|
| 2173 | i2 = i2 + 1 |
|---|
| 2174 | |
|---|
| 2175 | ENDIF |
|---|
| 2176 | |
|---|
| 2177 | ENDDO |
|---|
| 2178 | ENDDO |
|---|
| 2179 | |
|---|
| 2180 | DO i = nxl_mg(l)+1, nxr_mg(l), 2 |
|---|
| 2181 | DO j = nys_mg(l) + 2 - color, nyn_mg(l), 2 |
|---|
| 2182 | |
|---|
| 2183 | IF ( j == nys_mg(l) ) THEN |
|---|
| 2184 | !DIR$ IVDEP |
|---|
| 2185 | DO k = nzb+1, ind_even_odd |
|---|
| 2186 | temp(k,jys,i1) = p_mg(k,j,i) |
|---|
| 2187 | ENDDO |
|---|
| 2188 | i1 = i1 + 1 |
|---|
| 2189 | |
|---|
| 2190 | ENDIF |
|---|
| 2191 | |
|---|
| 2192 | IF ( j == nyn_mg(l) ) THEN |
|---|
| 2193 | !DIR$ IVDEP |
|---|
| 2194 | DO k = nzb+1, ind_even_odd |
|---|
| 2195 | temp(k,jyn,i2) = p_mg(k,j,i) |
|---|
| 2196 | ENDDO |
|---|
| 2197 | i2 = i2 + 1 |
|---|
| 2198 | |
|---|
| 2199 | ENDIF |
|---|
| 2200 | |
|---|
| 2201 | ENDDO |
|---|
| 2202 | ENDDO |
|---|
| 2203 | |
|---|
| 2204 | grid_level = grid_level-1 |
|---|
| 2205 | |
|---|
| 2206 | send_receive = 'ns' |
|---|
| 2207 | CALL exchange_horiz( temp, 1 ) |
|---|
| 2208 | |
|---|
| 2209 | grid_level = grid_level+1 |
|---|
| 2210 | |
|---|
| 2211 | i1 = nxl_mg(grid_level-1) |
|---|
| 2212 | i2 = nxl_mg(grid_level-1) |
|---|
| 2213 | |
|---|
| 2214 | DO i = nxl_mg(l), nxr_mg(l), 2 |
|---|
| 2215 | DO j = nys_mg(l) + (color-1), nyn_mg(l), 2 |
|---|
| 2216 | |
|---|
| 2217 | IF ( j == nys_mg(l) ) THEN |
|---|
| 2218 | !DIR$ IVDEP |
|---|
| 2219 | DO k = nzb+1, ind_even_odd |
|---|
| 2220 | p_mg(k,nyn_mg(l)+1,i) = temp(k,jyn+1,i1) |
|---|
| 2221 | ENDDO |
|---|
| 2222 | i1 = i1 + 1 |
|---|
| 2223 | |
|---|
| 2224 | ENDIF |
|---|
| 2225 | |
|---|
| 2226 | IF ( j == nyn_mg(l) ) THEN |
|---|
| 2227 | !DIR$ IVDEP |
|---|
| 2228 | DO k = nzb+1, ind_even_odd |
|---|
| 2229 | p_mg(k,nys_mg(l)-1,i) = temp(k,jys-1,i2) |
|---|
| 2230 | ENDDO |
|---|
| 2231 | i2 = i2 + 1 |
|---|
| 2232 | |
|---|
| 2233 | ENDIF |
|---|
| 2234 | |
|---|
| 2235 | ENDDO |
|---|
| 2236 | ENDDO |
|---|
| 2237 | |
|---|
| 2238 | DO i = nxl_mg(l)+1, nxr_mg(l), 2 |
|---|
| 2239 | DO j = nys_mg(l) + 2 - color, nyn_mg(l), 2 |
|---|
| 2240 | |
|---|
| 2241 | IF ( j == nys_mg(l) ) THEN |
|---|
| 2242 | !DIR$ IVDEP |
|---|
| 2243 | DO k = nzb+1, ind_even_odd |
|---|
| 2244 | p_mg(k,nyn_mg(l)+1,i) = temp(k,jyn+1,i1) |
|---|
| 2245 | ENDDO |
|---|
| 2246 | i1 = i1 + 1 |
|---|
| 2247 | |
|---|
| 2248 | ENDIF |
|---|
| 2249 | |
|---|
| 2250 | IF ( j == nyn_mg(l) ) THEN |
|---|
| 2251 | !DIR$ IVDEP |
|---|
| 2252 | DO k = nzb+1, ind_even_odd |
|---|
| 2253 | p_mg(k,nys_mg(l)-1,i) = temp(k,jys-1,i2) |
|---|
| 2254 | ENDDO |
|---|
| 2255 | i2 = i2 + 1 |
|---|
| 2256 | |
|---|
| 2257 | ENDIF |
|---|
| 2258 | |
|---|
| 2259 | ENDDO |
|---|
| 2260 | ENDDO |
|---|
| 2261 | |
|---|
| 2262 | j1 = nys_mg(grid_level-1) |
|---|
| 2263 | j2 = nys_mg(grid_level-1) |
|---|
| 2264 | |
|---|
| 2265 | DO i = nxl_mg(l), nxr_mg(l), 2 |
|---|
| 2266 | DO j = nys_mg(l) + (color-1), nyn_mg(l), 2 |
|---|
| 2267 | |
|---|
| 2268 | IF ( i == nxl_mg(l) ) THEN |
|---|
| 2269 | !DIR$ IVDEP |
|---|
| 2270 | DO k = nzb+1, ind_even_odd |
|---|
| 2271 | temp(k,j1,ixl) = p_mg(k,j,i) |
|---|
| 2272 | ENDDO |
|---|
| 2273 | j1 = j1 + 1 |
|---|
| 2274 | |
|---|
| 2275 | ENDIF |
|---|
| 2276 | |
|---|
| 2277 | IF ( i == nxr_mg(l) ) THEN |
|---|
| 2278 | !DIR$ IVDEP |
|---|
| 2279 | DO k = nzb+1, ind_even_odd |
|---|
| 2280 | temp(k,j2,ixr) = p_mg(k,j,i) |
|---|
| 2281 | ENDDO |
|---|
| 2282 | j2 = j2 + 1 |
|---|
| 2283 | |
|---|
| 2284 | ENDIF |
|---|
| 2285 | |
|---|
| 2286 | ENDDO |
|---|
| 2287 | ENDDO |
|---|
| 2288 | |
|---|
| 2289 | DO i = nxl_mg(l)+1, nxr_mg(l), 2 |
|---|
| 2290 | DO j = nys_mg(l) + 2 - color, nyn_mg(l), 2 |
|---|
| 2291 | |
|---|
| 2292 | IF ( i == nxl_mg(l) ) THEN |
|---|
| 2293 | !DIR$ IVDEP |
|---|
| 2294 | DO k = nzb+1, ind_even_odd |
|---|
| 2295 | temp(k,j1,ixl) = p_mg(k,j,i) |
|---|
| 2296 | ENDDO |
|---|
| 2297 | j1 = j1 + 1 |
|---|
| 2298 | |
|---|
| 2299 | ENDIF |
|---|
| 2300 | |
|---|
| 2301 | IF ( i == nxr_mg(l) ) THEN |
|---|
| 2302 | !DIR$ IVDEP |
|---|
| 2303 | DO k = nzb+1, ind_even_odd |
|---|
| 2304 | temp(k,j2,ixr) = p_mg(k,j,i) |
|---|
| 2305 | ENDDO |
|---|
| 2306 | j2 = j2 + 1 |
|---|
| 2307 | |
|---|
| 2308 | ENDIF |
|---|
| 2309 | |
|---|
| 2310 | ENDDO |
|---|
| 2311 | ENDDO |
|---|
| 2312 | |
|---|
| 2313 | grid_level = grid_level-1 |
|---|
| 2314 | |
|---|
| 2315 | send_receive = 'lr' |
|---|
| 2316 | CALL exchange_horiz( temp, 1 ) |
|---|
| 2317 | |
|---|
| 2318 | grid_level = grid_level+1 |
|---|
| 2319 | |
|---|
| 2320 | nxl = nxl_mg(grid_level) |
|---|
| 2321 | nys = nys_mg(grid_level) |
|---|
| 2322 | nxr = nxr_mg(grid_level) |
|---|
| 2323 | nyn = nyn_mg(grid_level) |
|---|
| 2324 | nzt = nzt_mg(grid_level) |
|---|
| 2325 | |
|---|
| 2326 | j1 = nys_mg(grid_level-1) |
|---|
| 2327 | j2 = nys_mg(grid_level-1) |
|---|
| 2328 | |
|---|
| 2329 | DO i = nxl_mg(l), nxr_mg(l), 2 |
|---|
| 2330 | DO j = nys_mg(l) + (color-1), nyn_mg(l), 2 |
|---|
| 2331 | |
|---|
| 2332 | IF ( i == nxl_mg(l) ) THEN |
|---|
| 2333 | !DIR$ IVDEP |
|---|
| 2334 | DO k = nzb+1, ind_even_odd |
|---|
| 2335 | p_mg(k,j,nxr_mg(l)+1) = temp(k,j1,ixr+1) |
|---|
| 2336 | ENDDO |
|---|
| 2337 | j1 = j1 + 1 |
|---|
| 2338 | |
|---|
| 2339 | ENDIF |
|---|
| 2340 | |
|---|
| 2341 | IF ( i == nxr_mg(l) ) THEN |
|---|
| 2342 | !DIR$ IVDEP |
|---|
| 2343 | DO k = nzb+1, ind_even_odd |
|---|
| 2344 | p_mg(k,j,nxl_mg(l)-1) = temp(k,j2,ixl-1) |
|---|
| 2345 | ENDDO |
|---|
| 2346 | j2 = j2 + 1 |
|---|
| 2347 | |
|---|
| 2348 | ENDIF |
|---|
| 2349 | |
|---|
| 2350 | ENDDO |
|---|
| 2351 | ENDDO |
|---|
| 2352 | |
|---|
| 2353 | DO i = nxl_mg(l)+1, nxr_mg(l), 2 |
|---|
| 2354 | DO j = nys_mg(l) + 2 - color, nyn_mg(l), 2 |
|---|
| 2355 | |
|---|
| 2356 | IF ( i == nxl_mg(l) ) THEN |
|---|
| 2357 | !DIR$ IVDEP |
|---|
| 2358 | DO k = nzb+1, ind_even_odd |
|---|
| 2359 | p_mg(k,j,nxr_mg(l)+1) = temp(k,j1,ixr+1) |
|---|
| 2360 | ENDDO |
|---|
| 2361 | j1 = j1 + 1 |
|---|
| 2362 | |
|---|
| 2363 | ENDIF |
|---|
| 2364 | |
|---|
| 2365 | IF ( i == nxr_mg(l) ) THEN |
|---|
| 2366 | !DIR$ IVDEP |
|---|
| 2367 | DO k = nzb+1, ind_even_odd |
|---|
| 2368 | p_mg(k,j,nxl_mg(l)-1) = temp(k,j2,ixl-1) |
|---|
| 2369 | ENDDO |
|---|
| 2370 | j2 = j2 + 1 |
|---|
| 2371 | |
|---|
| 2372 | ENDIF |
|---|
| 2373 | |
|---|
| 2374 | ENDDO |
|---|
| 2375 | ENDDO |
|---|
| 2376 | |
|---|
| 2377 | DEALLOCATE( temp ) |
|---|
| 2378 | |
|---|
| 2379 | ELSE |
|---|
| 2380 | |
|---|
| 2381 | ! |
|---|
| 2382 | !-- Standard horizontal ghost boundary exchange for small coarse grid |
|---|
| 2383 | !-- levels, where the transfer time is latency bound |
|---|
| 2384 | CALL exchange_horiz( p_mg, 1 ) |
|---|
| 2385 | |
|---|
| 2386 | ENDIF |
|---|
| 2387 | |
|---|
| 2388 | ! |
|---|
| 2389 | !-- Reset values to default PALM setup |
|---|
| 2390 | synchronous_exchange = synchronous_exchange_save |
|---|
| 2391 | send_receive = 'al' |
|---|
| 2392 | #else |
|---|
| 2393 | |
|---|
| 2394 | ! |
|---|
| 2395 | !-- Standard horizontal ghost boundary exchange for small coarse grid |
|---|
| 2396 | !-- levels, where the transfer time is latency bound |
|---|
| 2397 | CALL exchange_horiz( p_mg, 1 ) |
|---|
| 2398 | #endif |
|---|
| 2399 | |
|---|
| 2400 | END SUBROUTINE special_exchange_horiz |
|---|
| 2401 | |
|---|
| 2402 | END MODULE poismg_mod |
|---|
