[1682] | 1 | !> @file poisfft.f90 |
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[1036] | 2 | !--------------------------------------------------------------------------------! |
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| 3 | ! This file is part of PALM. |
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| 4 | ! |
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| 5 | ! PALM is free software: you can redistribute it and/or modify it under the terms |
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| 6 | ! of the GNU General Public License as published by the Free Software Foundation, |
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| 7 | ! either version 3 of the License, or (at your option) any later version. |
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| 8 | ! |
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| 9 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
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| 10 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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| 11 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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| 12 | ! |
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| 13 | ! You should have received a copy of the GNU General Public License along with |
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| 14 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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| 15 | ! |
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[1310] | 16 | ! Copyright 1997-2014 Leibniz Universitaet Hannover |
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[1036] | 17 | !--------------------------------------------------------------------------------! |
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| 18 | ! |
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[484] | 19 | ! Current revisions: |
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[1] | 20 | ! ----------------- |
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[1682] | 21 | ! Code annotations made doxygen readable |
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[1483] | 22 | ! |
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[1321] | 23 | ! Former revisions: |
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| 24 | ! ----------------- |
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| 25 | ! $Id: poisfft.f90 1682 2015-10-07 23:56:08Z knoop $ |
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| 26 | ! |
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[1483] | 27 | ! 1482 2014-10-18 12:34:45Z raasch |
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| 28 | ! use 2d-decomposition, if accelerator boards are used |
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| 29 | ! |
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[1407] | 30 | ! 1406 2014-05-16 13:47:01Z raasch |
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| 31 | ! bugfix for pgi 14.4: declare create moved after array declaration |
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| 32 | ! |
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[1321] | 33 | ! 1320 2014-03-20 08:40:49Z raasch |
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[1320] | 34 | ! ONLY-attribute added to USE-statements, |
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| 35 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
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| 36 | ! kinds are defined in new module kinds, |
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| 37 | ! old module precision_kind is removed, |
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| 38 | ! revision history before 2012 removed, |
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| 39 | ! comment fields (!:) to be used for variable explanations added to |
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| 40 | ! all variable declaration statements |
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[1217] | 41 | ! |
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[1319] | 42 | ! 1318 2014-03-17 13:35:16Z raasch |
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| 43 | ! module interfaces removed |
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| 44 | ! |
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[1307] | 45 | ! 1306 2014-03-13 14:30:59Z raasch |
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| 46 | ! openmp sections removed from the overlap branch, |
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| 47 | ! second argument removed from parameter list |
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| 48 | ! |
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[1217] | 49 | ! 1216 2013-08-26 09:31:42Z raasch |
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[1216] | 50 | ! resorting of arrays moved to separate routines resort_for_..., |
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| 51 | ! one argument, used as temporary work array, removed from all transpose |
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| 52 | ! routines |
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| 53 | ! overlapping fft / transposition implemented |
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[1112] | 54 | ! |
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[1213] | 55 | ! 1212 2013-08-15 08:46:27Z raasch |
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| 56 | ! tridia routines moved to seperate module tridia_solver |
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| 57 | ! |
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[1209] | 58 | ! 1208 2013-08-13 06:41:49Z raasch |
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| 59 | ! acc-update clauses added for "ar" so that ffts other than cufft can also be |
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| 60 | ! used (although they are not ported and will give a poor performance) |
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| 61 | ! |
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[1112] | 62 | ! 1111 2013-03-08 23:54:10Z raasch |
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[1111] | 63 | ! further openACC porting of non-parallel (MPI) branch: |
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| 64 | ! tridiagonal routines split into extermal subroutines (instead using CONTAINS), |
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| 65 | ! no distinction between parallel/non-parallel in poisfft and tridia any more, |
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[1112] | 66 | ! tridia routines moved to end of file because of probable bug in PGI compiler 12.5 |
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[1111] | 67 | ! (otherwise "invalid device function" is indicated during runtime), |
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| 68 | ! optimization of tridia routines: constant elements and coefficients of tri are |
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| 69 | ! stored in seperate arrays ddzuw and tric, last dimension of tri reduced from 5 |
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| 70 | ! to 2, |
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| 71 | ! poisfft_init is now called internally from poisfft, maketri is called from |
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| 72 | ! poisfft_init, |
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| 73 | ! ibc_p_b = 2 removed |
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[1] | 74 | ! |
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[1107] | 75 | ! 1106 2013-03-04 05:31:38Z raasch |
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| 76 | ! routines fftx, ffty, fftxp, fftyp removed, calls replaced by fft_x, fft_y, |
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| 77 | ! in the 1D-decomposition routines fft_x, ffty are replaced by fft_x_1d, |
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| 78 | ! fft_y_1d |
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| 79 | ! |
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[1104] | 80 | ! 1103 2013-02-20 02:15:53Z raasch |
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| 81 | ! tri, ar, and ar1 arguments in tridia-routines (2d) are removed because they |
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| 82 | ! sometimes cause segmentation faults with intel 12.1 compiler |
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| 83 | ! |
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[1093] | 84 | ! 1092 2013-02-02 11:24:22Z raasch |
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| 85 | ! unused variables removed |
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| 86 | ! |
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[1037] | 87 | ! 1036 2012-10-22 13:43:42Z raasch |
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| 88 | ! code put under GPL (PALM 3.9) |
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| 89 | ! |
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[1014] | 90 | ! 2012-09-21 07:03:55Z raasch |
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| 91 | ! FLOAT type conversion replaced by REAL |
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| 92 | ! |
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[1004] | 93 | ! 1003 2012-09-14 14:35:53Z raasch |
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| 94 | ! indices nxa, nya, etc. replaced by nx, ny, etc. |
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| 95 | ! |
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[941] | 96 | ! 940 2012-07-09 14:31:00Z raasch |
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| 97 | ! special handling of tri-array as an argument in tridia_1dd routines switched |
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| 98 | ! off because it caused segmentation faults with intel 12.1 compiler |
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| 99 | ! |
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[878] | 100 | ! 877 2012-04-03 11:21:44Z suehring |
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| 101 | ! Bugfix: Avoid divisions by zero in case of using a 'neumann' bc for the |
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| 102 | ! pressure at the top of the model domain. |
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| 103 | ! |
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[810] | 104 | ! 809 2012-01-30 13:32:58Z maronga |
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| 105 | ! Bugfix: replaced .AND. and .NOT. with && and ! in the preprocessor directives |
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| 106 | ! |
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[808] | 107 | ! 807 2012-01-25 11:53:51Z maronga |
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| 108 | ! New cpp directive "__check" implemented which is used by check_namelist_files |
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| 109 | ! (most of the code is unneeded by check_namelist_files). |
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| 110 | ! |
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[1] | 111 | ! Revision 1.1 1997/07/24 11:24:14 raasch |
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| 112 | ! Initial revision |
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| 113 | ! |
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| 114 | ! |
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| 115 | ! Description: |
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| 116 | ! ------------ |
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[1682] | 117 | !> Solves the Poisson equation with a 2D spectral method |
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| 118 | !> d^2 p / dx^2 + d^2 p / dy^2 + d^2 p / dz^2 = s |
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| 119 | !> |
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| 120 | !> Input: |
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| 121 | !> real ar contains (nnz,nny,nnx) elements of the velocity divergence, |
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| 122 | !> starting from (1,nys,nxl) |
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| 123 | !> |
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| 124 | !> Output: |
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| 125 | !> real ar contains the solution for perturbation pressure p |
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[1] | 126 | !------------------------------------------------------------------------------! |
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[1682] | 127 | MODULE poisfft_mod |
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| 128 | |
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[1] | 129 | |
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[1320] | 130 | USE fft_xy, & |
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| 131 | ONLY: fft_init, fft_y, fft_y_1d, fft_y_m, fft_x, fft_x_1d, fft_x_m |
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[1] | 132 | |
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[1320] | 133 | USE indices, & |
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| 134 | ONLY: nnx, nny, nx, nxl, nxr, ny, nys, nyn, nz |
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| 135 | |
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| 136 | USE transpose_indices, & |
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| 137 | ONLY: nxl_y, nxl_z, nxr_y, nxr_z, nys_x, nys_z, nyn_x, nyn_z, nzb_x, & |
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| 138 | nzb_y, nzt_x, nzt_y |
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| 139 | |
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| 140 | USE tridia_solver, & |
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| 141 | ONLY: tridia_1dd, tridia_init, tridia_substi, tridia_substi_overlap |
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| 142 | |
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[1] | 143 | IMPLICIT NONE |
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| 144 | |
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[1111] | 145 | LOGICAL, SAVE :: poisfft_initialized = .FALSE. |
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| 146 | |
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[1] | 147 | PRIVATE |
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[807] | 148 | |
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[809] | 149 | #if ! defined ( __check ) |
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[1] | 150 | PUBLIC poisfft, poisfft_init |
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| 151 | |
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| 152 | INTERFACE poisfft |
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| 153 | MODULE PROCEDURE poisfft |
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| 154 | END INTERFACE poisfft |
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| 155 | |
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| 156 | INTERFACE poisfft_init |
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| 157 | MODULE PROCEDURE poisfft_init |
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| 158 | END INTERFACE poisfft_init |
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[807] | 159 | #else |
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| 160 | PUBLIC poisfft_init |
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[1] | 161 | |
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[807] | 162 | INTERFACE poisfft_init |
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| 163 | MODULE PROCEDURE poisfft_init |
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| 164 | END INTERFACE poisfft_init |
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| 165 | #endif |
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| 166 | |
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[1] | 167 | CONTAINS |
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| 168 | |
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[1682] | 169 | !------------------------------------------------------------------------------! |
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| 170 | ! Description: |
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| 171 | ! ------------ |
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| 172 | !> @todo Missing subroutine description. |
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| 173 | !------------------------------------------------------------------------------! |
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[1] | 174 | SUBROUTINE poisfft_init |
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| 175 | |
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[1320] | 176 | USE arrays_3d, & |
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| 177 | ONLY: ddzu_pres, ddzw |
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[1111] | 178 | |
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[1320] | 179 | USE kinds |
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| 180 | |
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[1111] | 181 | IMPLICIT NONE |
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| 182 | |
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[1682] | 183 | INTEGER(iwp) :: k !< |
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[1111] | 184 | |
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| 185 | |
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[1] | 186 | CALL fft_init |
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| 187 | |
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[1212] | 188 | CALL tridia_init |
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[1111] | 189 | |
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| 190 | poisfft_initialized = .TRUE. |
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| 191 | |
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[1] | 192 | END SUBROUTINE poisfft_init |
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| 193 | |
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[1111] | 194 | |
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[809] | 195 | #if ! defined ( __check ) |
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[1682] | 196 | !------------------------------------------------------------------------------! |
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| 197 | ! Description: |
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| 198 | ! ------------ |
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| 199 | !> Two-dimensional Fourier Transformation in x- and y-direction. |
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| 200 | !------------------------------------------------------------------------------! |
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[1306] | 201 | SUBROUTINE poisfft( ar ) |
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[1] | 202 | |
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[1320] | 203 | USE control_parameters, & |
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| 204 | ONLY: fft_method, transpose_compute_overlap |
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| 205 | |
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| 206 | USE cpulog, & |
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| 207 | ONLY: cpu_log, cpu_log_nowait, log_point_s |
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| 208 | |
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| 209 | USE kinds |
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| 210 | |
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[1] | 211 | USE pegrid |
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| 212 | |
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| 213 | IMPLICIT NONE |
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| 214 | |
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[1682] | 215 | INTEGER(iwp) :: ii !< |
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| 216 | INTEGER(iwp) :: iind !< |
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| 217 | INTEGER(iwp) :: inew !< |
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| 218 | INTEGER(iwp) :: jj !< |
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| 219 | INTEGER(iwp) :: jind !< |
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| 220 | INTEGER(iwp) :: jnew !< |
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| 221 | INTEGER(iwp) :: ki !< |
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| 222 | INTEGER(iwp) :: kk !< |
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| 223 | INTEGER(iwp) :: knew !< |
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| 224 | INTEGER(iwp) :: n !< |
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| 225 | INTEGER(iwp) :: nblk !< |
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| 226 | INTEGER(iwp) :: nnx_y !< |
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| 227 | INTEGER(iwp) :: nny_z !< |
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| 228 | INTEGER(iwp) :: nnz_t !< |
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| 229 | INTEGER(iwp) :: nnz_x !< |
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| 230 | INTEGER(iwp) :: nxl_y_bound !< |
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| 231 | INTEGER(iwp) :: nxr_y_bound !< |
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[1] | 232 | |
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[1682] | 233 | INTEGER(iwp), DIMENSION(4) :: isave !< |
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[1320] | 234 | |
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[1682] | 235 | REAL(wp), DIMENSION(1:nz,nys:nyn,nxl:nxr) :: ar !< |
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| 236 | REAL(wp), DIMENSION(nys:nyn,nxl:nxr,1:nz) :: ar_inv !< |
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[1216] | 237 | !$acc declare create( ar_inv ) |
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[1] | 238 | |
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[1682] | 239 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: ar1 !< |
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| 240 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: f_in !< |
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| 241 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: f_inv !< |
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| 242 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: f_out_y !< |
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| 243 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: f_out_z !< |
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[1216] | 244 | |
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| 245 | |
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[1] | 246 | CALL cpu_log( log_point_s(3), 'poisfft', 'start' ) |
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| 247 | |
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[1111] | 248 | IF ( .NOT. poisfft_initialized ) CALL poisfft_init |
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| 249 | |
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[1] | 250 | ! |
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| 251 | !-- Two-dimensional Fourier Transformation in x- and y-direction. |
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[1482] | 252 | IF ( pdims(2) == 1 .AND. pdims(1) > 1 .AND. num_acc_per_node == 0 ) & |
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| 253 | THEN |
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[1] | 254 | |
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| 255 | ! |
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| 256 | !-- 1d-domain-decomposition along x: |
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| 257 | !-- FFT along y and transposition y --> x |
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[1216] | 258 | CALL ffty_tr_yx( ar, ar ) |
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[1] | 259 | |
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| 260 | ! |
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| 261 | !-- FFT along x, solving the tridiagonal system and backward FFT |
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| 262 | CALL fftx_tri_fftx( ar ) |
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| 263 | |
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| 264 | ! |
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| 265 | !-- Transposition x --> y and backward FFT along y |
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[1216] | 266 | CALL tr_xy_ffty( ar, ar ) |
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[1] | 267 | |
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[1482] | 268 | ELSEIF ( pdims(1) == 1 .AND. pdims(2) > 1 .AND. num_acc_per_node == 0 ) & |
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| 269 | THEN |
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[1] | 270 | |
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| 271 | ! |
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| 272 | !-- 1d-domain-decomposition along y: |
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| 273 | !-- FFT along x and transposition x --> y |
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[1216] | 274 | CALL fftx_tr_xy( ar, ar ) |
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[1] | 275 | |
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| 276 | ! |
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| 277 | !-- FFT along y, solving the tridiagonal system and backward FFT |
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| 278 | CALL ffty_tri_ffty( ar ) |
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| 279 | |
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| 280 | ! |
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| 281 | !-- Transposition y --> x and backward FFT along x |
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[1216] | 282 | CALL tr_yx_fftx( ar, ar ) |
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[1] | 283 | |
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[1216] | 284 | ELSEIF ( .NOT. transpose_compute_overlap ) THEN |
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[1] | 285 | |
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| 286 | ! |
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[1111] | 287 | !-- 2d-domain-decomposition or no decomposition (1 PE run) |
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[1] | 288 | !-- Transposition z --> x |
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| 289 | CALL cpu_log( log_point_s(5), 'transpo forward', 'start' ) |
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[1216] | 290 | CALL resort_for_zx( ar, ar_inv ) |
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| 291 | CALL transpose_zx( ar_inv, ar ) |
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[1] | 292 | CALL cpu_log( log_point_s(5), 'transpo forward', 'pause' ) |
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| 293 | |
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| 294 | CALL cpu_log( log_point_s(4), 'fft_x', 'start' ) |
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[1208] | 295 | IF ( fft_method /= 'system-specific' ) THEN |
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| 296 | !$acc update host( ar ) |
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| 297 | ENDIF |
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[1106] | 298 | CALL fft_x( ar, 'forward' ) |
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[1208] | 299 | IF ( fft_method /= 'system-specific' ) THEN |
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| 300 | !$acc update device( ar ) |
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| 301 | ENDIF |
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[1] | 302 | CALL cpu_log( log_point_s(4), 'fft_x', 'pause' ) |
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| 303 | |
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| 304 | ! |
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| 305 | !-- Transposition x --> y |
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| 306 | CALL cpu_log( log_point_s(5), 'transpo forward', 'continue' ) |
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[1216] | 307 | CALL resort_for_xy( ar, ar_inv ) |
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| 308 | CALL transpose_xy( ar_inv, ar ) |
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[1] | 309 | CALL cpu_log( log_point_s(5), 'transpo forward', 'pause' ) |
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| 310 | |
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| 311 | CALL cpu_log( log_point_s(7), 'fft_y', 'start' ) |
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[1208] | 312 | IF ( fft_method /= 'system-specific' ) THEN |
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| 313 | !$acc update host( ar ) |
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| 314 | ENDIF |
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[1216] | 315 | CALL fft_y( ar, 'forward', ar_tr = ar, & |
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| 316 | nxl_y_bound = nxl_y, nxr_y_bound = nxr_y, & |
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| 317 | nxl_y_l = nxl_y, nxr_y_l = nxr_y ) |
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[1208] | 318 | IF ( fft_method /= 'system-specific' ) THEN |
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| 319 | !$acc update device( ar ) |
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| 320 | ENDIF |
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[1] | 321 | CALL cpu_log( log_point_s(7), 'fft_y', 'pause' ) |
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| 322 | |
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| 323 | ! |
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| 324 | !-- Transposition y --> z |
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| 325 | CALL cpu_log( log_point_s(5), 'transpo forward', 'continue' ) |
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[1216] | 326 | CALL resort_for_yz( ar, ar_inv ) |
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| 327 | CALL transpose_yz( ar_inv, ar ) |
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[1] | 328 | CALL cpu_log( log_point_s(5), 'transpo forward', 'stop' ) |
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| 329 | |
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| 330 | ! |
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[1106] | 331 | !-- Solve the tridiagonal equation system along z |
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[1] | 332 | CALL cpu_log( log_point_s(6), 'tridia', 'start' ) |
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[1212] | 333 | CALL tridia_substi( ar ) |
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[1] | 334 | CALL cpu_log( log_point_s(6), 'tridia', 'stop' ) |
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| 335 | |
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| 336 | ! |
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| 337 | !-- Inverse Fourier Transformation |
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| 338 | !-- Transposition z --> y |
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| 339 | CALL cpu_log( log_point_s(8), 'transpo invers', 'start' ) |
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[1216] | 340 | CALL transpose_zy( ar, ar_inv ) |
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| 341 | CALL resort_for_zy( ar_inv, ar ) |
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[1] | 342 | CALL cpu_log( log_point_s(8), 'transpo invers', 'pause' ) |
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| 343 | |
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| 344 | CALL cpu_log( log_point_s(7), 'fft_y', 'continue' ) |
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[1208] | 345 | IF ( fft_method /= 'system-specific' ) THEN |
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| 346 | !$acc update host( ar ) |
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| 347 | ENDIF |
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[1216] | 348 | CALL fft_y( ar, 'backward', ar_tr = ar, & |
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| 349 | nxl_y_bound = nxl_y, nxr_y_bound = nxr_y, & |
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| 350 | nxl_y_l = nxl_y, nxr_y_l = nxr_y ) |
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[1208] | 351 | IF ( fft_method /= 'system-specific' ) THEN |
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| 352 | !$acc update device( ar ) |
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| 353 | ENDIF |
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[1] | 354 | CALL cpu_log( log_point_s(7), 'fft_y', 'stop' ) |
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| 355 | |
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| 356 | ! |
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| 357 | !-- Transposition y --> x |
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| 358 | CALL cpu_log( log_point_s(8), 'transpo invers', 'continue' ) |
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[1216] | 359 | CALL transpose_yx( ar, ar_inv ) |
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| 360 | CALL resort_for_yx( ar_inv, ar ) |
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[1] | 361 | CALL cpu_log( log_point_s(8), 'transpo invers', 'pause' ) |
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| 362 | |
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| 363 | CALL cpu_log( log_point_s(4), 'fft_x', 'continue' ) |
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[1208] | 364 | IF ( fft_method /= 'system-specific' ) THEN |
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| 365 | !$acc update host( ar ) |
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| 366 | ENDIF |
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[1106] | 367 | CALL fft_x( ar, 'backward' ) |
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[1208] | 368 | IF ( fft_method /= 'system-specific' ) THEN |
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| 369 | !$acc update device( ar ) |
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| 370 | ENDIF |
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[1] | 371 | CALL cpu_log( log_point_s(4), 'fft_x', 'stop' ) |
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| 372 | |
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| 373 | ! |
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| 374 | !-- Transposition x --> z |
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| 375 | CALL cpu_log( log_point_s(8), 'transpo invers', 'continue' ) |
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[1216] | 376 | CALL transpose_xz( ar, ar_inv ) |
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| 377 | CALL resort_for_xz( ar_inv, ar ) |
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[1] | 378 | CALL cpu_log( log_point_s(8), 'transpo invers', 'stop' ) |
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| 379 | |
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[1216] | 380 | ELSE |
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| 381 | |
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| 382 | ! |
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| 383 | !-- 2d-domain-decomposition or no decomposition (1 PE run) with |
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| 384 | !-- overlapping transposition / fft |
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[1318] | 385 | !-- cputime logging must not use barriers, which would prevent overlapping |
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[1216] | 386 | ALLOCATE( f_out_y(0:ny,nxl_y:nxr_y,nzb_y:nzt_y), & |
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| 387 | f_out_z(0:nx,nys_x:nyn_x,nzb_x:nzt_x) ) |
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| 388 | ! |
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| 389 | !-- Transposition z --> x + subsequent fft along x |
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| 390 | ALLOCATE( f_inv(nys:nyn,nxl:nxr,1:nz) ) |
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| 391 | CALL resort_for_zx( ar, f_inv ) |
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| 392 | ! |
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| 393 | !-- Save original indices and gridpoint counter |
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| 394 | isave(1) = nz |
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| 395 | isave(2) = nzb_x |
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| 396 | isave(3) = nzt_x |
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| 397 | isave(4) = sendrecvcount_zx |
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| 398 | ! |
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| 399 | !-- Set new indices for transformation |
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| 400 | nblk = nz / pdims(1) |
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| 401 | nz = pdims(1) |
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| 402 | nnz_x = 1 |
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| 403 | nzb_x = 1 + myidx * nnz_x |
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| 404 | nzt_x = ( myidx + 1 ) * nnz_x |
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| 405 | sendrecvcount_zx = nnx * nny * nnz_x |
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| 406 | |
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[1306] | 407 | ALLOCATE( ar1(0:nx,nys_x:nyn_x,nzb_x:nzt_x) ) |
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[1216] | 408 | ALLOCATE( f_in(nys:nyn,nxl:nxr,1:nz) ) |
---|
| 409 | |
---|
[1306] | 410 | DO kk = 1, nblk |
---|
[1216] | 411 | |
---|
[1306] | 412 | IF ( kk == 1 ) THEN |
---|
[1318] | 413 | CALL cpu_log( log_point_s(5), 'transpo forward', 'start', cpu_log_nowait ) |
---|
[1306] | 414 | ELSE |
---|
[1318] | 415 | CALL cpu_log( log_point_s(5), 'transpo forward', 'continue', cpu_log_nowait ) |
---|
[1306] | 416 | ENDIF |
---|
[1216] | 417 | |
---|
[1306] | 418 | DO knew = 1, nz |
---|
| 419 | ki = kk + nblk * ( knew - 1 ) |
---|
| 420 | f_in(:,:,knew) = f_inv(:,:,ki) |
---|
| 421 | ENDDO |
---|
[1216] | 422 | |
---|
[1306] | 423 | CALL transpose_zx( f_in, ar1(:,:,:)) |
---|
| 424 | CALL cpu_log( log_point_s(5), 'transpo forward', 'pause' ) |
---|
[1216] | 425 | |
---|
[1306] | 426 | IF ( kk == 1 ) THEN |
---|
[1318] | 427 | CALL cpu_log( log_point_s(4), 'fft_x', 'start', cpu_log_nowait ) |
---|
[1306] | 428 | ELSE |
---|
[1318] | 429 | CALL cpu_log( log_point_s(4), 'fft_x', 'continue', cpu_log_nowait ) |
---|
[1216] | 430 | ENDIF |
---|
| 431 | |
---|
[1306] | 432 | n = isave(2) + kk - 1 |
---|
| 433 | CALL fft_x( ar1(:,:,:), 'forward', ar_2d = f_out_z(:,:,n)) |
---|
| 434 | CALL cpu_log( log_point_s(4), 'fft_x', 'pause' ) |
---|
[1216] | 435 | |
---|
| 436 | ENDDO |
---|
| 437 | ! |
---|
| 438 | !-- Restore original indices/counters |
---|
| 439 | nz = isave(1) |
---|
| 440 | nzb_x = isave(2) |
---|
| 441 | nzt_x = isave(3) |
---|
| 442 | sendrecvcount_zx = isave(4) |
---|
| 443 | |
---|
| 444 | DEALLOCATE( ar1, f_in, f_inv ) |
---|
| 445 | |
---|
| 446 | ! |
---|
| 447 | !-- Transposition x --> y + subsequent fft along y |
---|
| 448 | ALLOCATE( f_inv(nys_x:nyn_x,nzb_x:nzt_x,0:nx) ) |
---|
| 449 | CALL resort_for_xy( f_out_z, f_inv ) |
---|
| 450 | ! |
---|
| 451 | !-- Save original indices and gridpoint counter |
---|
| 452 | isave(1) = nx |
---|
| 453 | isave(2) = nxl_y |
---|
| 454 | isave(3) = nxr_y |
---|
| 455 | isave(4) = sendrecvcount_xy |
---|
| 456 | ! |
---|
| 457 | !-- Set new indices for transformation |
---|
| 458 | nblk = ( ( nx+1 ) / pdims(2) ) - 1 |
---|
| 459 | nx = pdims(2) |
---|
| 460 | nnx_y = 1 |
---|
| 461 | nxl_y = myidy * nnx_y |
---|
| 462 | nxr_y = ( myidy + 1 ) * nnx_y - 1 |
---|
| 463 | sendrecvcount_xy = nnx_y * ( nyn_x-nys_x+1 ) * ( nzt_x-nzb_x+1 ) |
---|
| 464 | |
---|
[1306] | 465 | ALLOCATE( ar1(0:ny,nxl_y:nxr_y,nzb_y:nzt_y) ) |
---|
[1216] | 466 | ALLOCATE( f_in(nys_x:nyn_x,nzb_x:nzt_x,0:nx) ) |
---|
| 467 | |
---|
[1306] | 468 | DO ii = 0, nblk |
---|
[1216] | 469 | |
---|
[1318] | 470 | CALL cpu_log( log_point_s(5), 'transpo forward', 'continue', cpu_log_nowait ) |
---|
[1216] | 471 | |
---|
[1306] | 472 | DO inew = 0, nx-1 |
---|
| 473 | iind = ii + ( nblk + 1 ) * inew |
---|
| 474 | f_in(:,:,inew) = f_inv(:,:,iind) |
---|
| 475 | ENDDO |
---|
[1216] | 476 | |
---|
[1306] | 477 | CALL transpose_xy( f_in, ar1(:,:,:) ) |
---|
[1216] | 478 | |
---|
[1306] | 479 | CALL cpu_log( log_point_s(5), 'transpo forward', 'pause' ) |
---|
[1216] | 480 | |
---|
[1306] | 481 | IF ( ii == 1 ) THEN |
---|
[1318] | 482 | CALL cpu_log( log_point_s(7), 'fft_y', 'start', cpu_log_nowait ) |
---|
[1306] | 483 | ELSE |
---|
[1318] | 484 | CALL cpu_log( log_point_s(7), 'fft_y', 'continue', cpu_log_nowait ) |
---|
[1216] | 485 | ENDIF |
---|
| 486 | |
---|
[1306] | 487 | nxl_y_bound = isave(2) |
---|
| 488 | nxr_y_bound = isave(3) |
---|
| 489 | n = isave(2) + ii |
---|
| 490 | CALL fft_y( ar1(:,:,:), 'forward', ar_tr = f_out_y, & |
---|
| 491 | nxl_y_bound = nxl_y_bound, nxr_y_bound = nxr_y_bound, & |
---|
| 492 | nxl_y_l = n, nxr_y_l = n ) |
---|
[1216] | 493 | |
---|
[1306] | 494 | CALL cpu_log( log_point_s(7), 'fft_y', 'pause' ) |
---|
[1216] | 495 | |
---|
| 496 | ENDDO |
---|
| 497 | ! |
---|
| 498 | !-- Restore original indices/counters |
---|
| 499 | nx = isave(1) |
---|
| 500 | nxl_y = isave(2) |
---|
| 501 | nxr_y = isave(3) |
---|
| 502 | sendrecvcount_xy = isave(4) |
---|
| 503 | |
---|
| 504 | DEALLOCATE( ar1, f_in, f_inv ) |
---|
| 505 | |
---|
| 506 | ! |
---|
| 507 | !-- Transposition y --> z + subsequent tridia + resort for z --> y |
---|
| 508 | ALLOCATE( f_inv(nxl_y:nxr_y,nzb_y:nzt_y,0:ny) ) |
---|
| 509 | CALL resort_for_yz( f_out_y, f_inv ) |
---|
| 510 | ! |
---|
| 511 | !-- Save original indices and gridpoint counter |
---|
| 512 | isave(1) = ny |
---|
| 513 | isave(2) = nys_z |
---|
| 514 | isave(3) = nyn_z |
---|
| 515 | isave(4) = sendrecvcount_yz |
---|
| 516 | ! |
---|
| 517 | !-- Set new indices for transformation |
---|
| 518 | nblk = ( ( ny+1 ) / pdims(1) ) - 1 |
---|
| 519 | ny = pdims(1) |
---|
| 520 | nny_z = 1 |
---|
| 521 | nys_z = myidx * nny_z |
---|
| 522 | nyn_z = ( myidx + 1 ) * nny_z - 1 |
---|
| 523 | sendrecvcount_yz = ( nxr_y-nxl_y+1 ) * nny_z * ( nzt_y-nzb_y+1 ) |
---|
| 524 | |
---|
[1306] | 525 | ALLOCATE( ar1(nxl_z:nxr_z,nys_z:nyn_z,1:nz) ) |
---|
[1216] | 526 | ALLOCATE( f_in(nxl_y:nxr_y,nzb_y:nzt_y,0:ny) ) |
---|
| 527 | |
---|
[1306] | 528 | DO jj = 0, nblk |
---|
[1216] | 529 | ! |
---|
[1306] | 530 | !-- Forward Fourier Transformation |
---|
| 531 | !-- Transposition y --> z |
---|
[1318] | 532 | CALL cpu_log( log_point_s(5), 'transpo forward', 'continue', cpu_log_nowait ) |
---|
[1216] | 533 | |
---|
[1306] | 534 | DO jnew = 0, ny-1 |
---|
| 535 | jind = jj + ( nblk + 1 ) * jnew |
---|
| 536 | f_in(:,:,jnew) = f_inv(:,:,jind) |
---|
| 537 | ENDDO |
---|
[1216] | 538 | |
---|
[1306] | 539 | CALL transpose_yz( f_in, ar1(:,:,:) ) |
---|
[1216] | 540 | |
---|
[1306] | 541 | IF ( jj == nblk ) THEN |
---|
| 542 | CALL cpu_log( log_point_s(5), 'transpo forward', 'stop' ) |
---|
| 543 | ELSE |
---|
| 544 | CALL cpu_log( log_point_s(5), 'transpo forward', 'pause' ) |
---|
[1216] | 545 | ENDIF |
---|
| 546 | |
---|
| 547 | ! |
---|
[1306] | 548 | !-- Solve the tridiagonal equation system along z |
---|
[1318] | 549 | CALL cpu_log( log_point_s(6), 'tridia', 'start', cpu_log_nowait ) |
---|
[1216] | 550 | |
---|
[1306] | 551 | n = isave(2) + jj |
---|
| 552 | CALL tridia_substi_overlap( ar1(:,:,:), n ) |
---|
[1216] | 553 | |
---|
[1306] | 554 | CALL cpu_log( log_point_s(6), 'tridia', 'stop' ) |
---|
[1216] | 555 | |
---|
[1306] | 556 | ! |
---|
| 557 | !-- Inverse Fourier Transformation |
---|
| 558 | !-- Transposition z --> y |
---|
| 559 | !-- Only one thread should call MPI routines, therefore forward and |
---|
| 560 | !-- backward tranpose are in the same section |
---|
| 561 | IF ( jj == 0 ) THEN |
---|
[1318] | 562 | CALL cpu_log( log_point_s(8), 'transpo invers', 'start', cpu_log_nowait ) |
---|
[1306] | 563 | ELSE |
---|
[1318] | 564 | CALL cpu_log( log_point_s(8), 'transpo invers', 'continue', cpu_log_nowait ) |
---|
[1216] | 565 | ENDIF |
---|
| 566 | |
---|
[1306] | 567 | CALL transpose_zy( ar1(:,:,:), f_in ) |
---|
[1216] | 568 | |
---|
[1306] | 569 | DO jnew = 0, ny-1 |
---|
| 570 | jind = jj + ( nblk + 1 ) * jnew |
---|
| 571 | f_inv(:,:,jind) = f_in(:,:,jnew) |
---|
| 572 | ENDDO |
---|
[1216] | 573 | |
---|
[1306] | 574 | CALL cpu_log( log_point_s(8), 'transpo invers', 'pause' ) |
---|
[1216] | 575 | |
---|
| 576 | ENDDO |
---|
| 577 | ! |
---|
| 578 | !-- Restore original indices/counters |
---|
| 579 | ny = isave(1) |
---|
| 580 | nys_z = isave(2) |
---|
| 581 | nyn_z = isave(3) |
---|
| 582 | sendrecvcount_yz = isave(4) |
---|
| 583 | |
---|
| 584 | CALL resort_for_zy( f_inv, f_out_y ) |
---|
| 585 | |
---|
| 586 | DEALLOCATE( ar1, f_in, f_inv ) |
---|
| 587 | |
---|
| 588 | ! |
---|
| 589 | !-- fft along y backward + subsequent transposition y --> x |
---|
| 590 | ALLOCATE( f_inv(nys_x:nyn_x,nzb_x:nzt_x,0:nx) ) |
---|
| 591 | ! |
---|
| 592 | !-- Save original indices and gridpoint counter |
---|
| 593 | isave(1) = nx |
---|
| 594 | isave(2) = nxl_y |
---|
| 595 | isave(3) = nxr_y |
---|
| 596 | isave(4) = sendrecvcount_xy |
---|
| 597 | ! |
---|
| 598 | !-- Set new indices for transformation |
---|
| 599 | nblk = (( nx+1 ) / pdims(2) ) - 1 |
---|
| 600 | nx = pdims(2) |
---|
| 601 | nnx_y = 1 |
---|
| 602 | nxl_y = myidy * nnx_y |
---|
| 603 | nxr_y = ( myidy + 1 ) * nnx_y - 1 |
---|
| 604 | sendrecvcount_xy = nnx_y * ( nyn_x-nys_x+1 ) * ( nzt_x-nzb_x+1 ) |
---|
| 605 | |
---|
[1306] | 606 | ALLOCATE( ar1(0:ny,nxl_y:nxr_y,nzb_y:nzt_y) ) |
---|
[1216] | 607 | ALLOCATE( f_in(nys_x:nyn_x,nzb_x:nzt_x,0:nx) ) |
---|
| 608 | |
---|
[1306] | 609 | DO ii = 0, nblk |
---|
[1216] | 610 | |
---|
[1318] | 611 | CALL cpu_log( log_point_s(7), 'fft_y', 'continue', cpu_log_nowait ) |
---|
[1216] | 612 | |
---|
[1306] | 613 | n = isave(2) + ii |
---|
| 614 | nxl_y_bound = isave(2) |
---|
| 615 | nxr_y_bound = isave(3) |
---|
[1216] | 616 | |
---|
[1306] | 617 | CALL fft_y( ar1(:,:,:), 'backward', ar_tr = f_out_y, & |
---|
| 618 | nxl_y_bound = nxl_y_bound, nxr_y_bound = nxr_y_bound, & |
---|
| 619 | nxl_y_l = n, nxr_y_l = n ) |
---|
[1216] | 620 | |
---|
[1306] | 621 | IF ( ii == nblk ) THEN |
---|
| 622 | CALL cpu_log( log_point_s(7), 'fft_y', 'stop' ) |
---|
| 623 | ELSE |
---|
| 624 | CALL cpu_log( log_point_s(7), 'fft_y', 'pause' ) |
---|
[1216] | 625 | ENDIF |
---|
| 626 | |
---|
[1318] | 627 | CALL cpu_log( log_point_s(8), 'transpo invers', 'continue', cpu_log_nowait ) |
---|
[1216] | 628 | |
---|
[1306] | 629 | CALL transpose_yx( ar1(:,:,:), f_in ) |
---|
[1216] | 630 | |
---|
[1306] | 631 | DO inew = 0, nx-1 |
---|
| 632 | iind = ii + (nblk+1) * inew |
---|
| 633 | f_inv(:,:,iind) = f_in(:,:,inew) |
---|
| 634 | ENDDO |
---|
[1216] | 635 | |
---|
[1306] | 636 | CALL cpu_log( log_point_s(8), 'transpo invers', 'pause' ) |
---|
[1216] | 637 | |
---|
| 638 | ENDDO |
---|
| 639 | ! |
---|
| 640 | !-- Restore original indices/counters |
---|
| 641 | nx = isave(1) |
---|
| 642 | nxl_y = isave(2) |
---|
| 643 | nxr_y = isave(3) |
---|
| 644 | sendrecvcount_xy = isave(4) |
---|
| 645 | |
---|
| 646 | CALL resort_for_yx( f_inv, f_out_z ) |
---|
| 647 | |
---|
| 648 | DEALLOCATE( ar1, f_in, f_inv ) |
---|
| 649 | |
---|
| 650 | ! |
---|
| 651 | !-- fft along x backward + subsequent final transposition x --> z |
---|
| 652 | ALLOCATE( f_inv(nys:nyn,nxl:nxr,1:nz) ) |
---|
| 653 | ! |
---|
| 654 | !-- Save original indices and gridpoint counter |
---|
| 655 | isave(1) = nz |
---|
| 656 | isave(2) = nzb_x |
---|
| 657 | isave(3) = nzt_x |
---|
| 658 | isave(4) = sendrecvcount_zx |
---|
| 659 | ! |
---|
| 660 | !-- Set new indices for transformation |
---|
| 661 | nblk = nz / pdims(1) |
---|
| 662 | nz = pdims(1) |
---|
| 663 | nnz_x = 1 |
---|
| 664 | nzb_x = 1 + myidx * nnz_x |
---|
| 665 | nzt_x = ( myidx + 1 ) * nnz_x |
---|
| 666 | sendrecvcount_zx = nnx * nny * nnz_x |
---|
| 667 | |
---|
[1306] | 668 | ALLOCATE( ar1(0:nx,nys_x:nyn_x,nzb_x:nzt_x) ) |
---|
[1216] | 669 | ALLOCATE( f_in(nys:nyn,nxl:nxr,1:nz) ) |
---|
| 670 | |
---|
[1306] | 671 | DO kk = 1, nblk |
---|
[1216] | 672 | |
---|
[1318] | 673 | CALL cpu_log( log_point_s(4), 'fft_x', 'continue', cpu_log_nowait ) |
---|
[1216] | 674 | |
---|
[1306] | 675 | n = isave(2) + kk - 1 |
---|
| 676 | CALL fft_x( ar1(:,:,:), 'backward', f_out_z(:,:,n)) |
---|
[1216] | 677 | |
---|
[1306] | 678 | IF ( kk == nblk ) THEN |
---|
| 679 | CALL cpu_log( log_point_s(4), 'fft_x', 'stop' ) |
---|
| 680 | ELSE |
---|
| 681 | CALL cpu_log( log_point_s(4), 'fft_x', 'pause' ) |
---|
[1216] | 682 | ENDIF |
---|
| 683 | |
---|
[1318] | 684 | CALL cpu_log( log_point_s(8), 'transpo invers', 'continue', cpu_log_nowait ) |
---|
[1216] | 685 | |
---|
[1306] | 686 | CALL transpose_xz( ar1(:,:,:), f_in ) |
---|
[1216] | 687 | |
---|
[1306] | 688 | DO knew = 1, nz |
---|
| 689 | ki = kk + nblk * (knew-1) |
---|
| 690 | f_inv(:,:,ki) = f_in(:,:,knew) |
---|
| 691 | ENDDO |
---|
[1216] | 692 | |
---|
[1306] | 693 | IF ( kk == nblk ) THEN |
---|
| 694 | CALL cpu_log( log_point_s(8), 'transpo invers', 'stop' ) |
---|
| 695 | ELSE |
---|
| 696 | CALL cpu_log( log_point_s(8), 'transpo invers', 'pause' ) |
---|
[1216] | 697 | ENDIF |
---|
| 698 | |
---|
| 699 | ENDDO |
---|
| 700 | ! |
---|
| 701 | !-- Restore original indices/counters |
---|
| 702 | nz = isave(1) |
---|
| 703 | nzb_x = isave(2) |
---|
| 704 | nzt_x = isave(3) |
---|
| 705 | sendrecvcount_zx = isave(4) |
---|
| 706 | |
---|
| 707 | CALL resort_for_xz( f_inv, ar ) |
---|
| 708 | |
---|
| 709 | DEALLOCATE( ar1, f_in, f_inv ) |
---|
| 710 | |
---|
[1] | 711 | ENDIF |
---|
| 712 | |
---|
| 713 | CALL cpu_log( log_point_s(3), 'poisfft', 'stop' ) |
---|
| 714 | |
---|
| 715 | END SUBROUTINE poisfft |
---|
| 716 | |
---|
| 717 | |
---|
| 718 | !------------------------------------------------------------------------------! |
---|
[1682] | 719 | ! Description: |
---|
| 720 | ! ------------ |
---|
| 721 | !> Fourier-transformation along y with subsequent transposition y --> x for |
---|
| 722 | !> a 1d-decomposition along x. |
---|
| 723 | !> |
---|
| 724 | !> @attention The performance of this routine is much faster on the NEC-SX6, |
---|
| 725 | !> if the first index of work_ffty_vec is odd. Otherwise |
---|
| 726 | !> memory bank conflicts may occur (especially if the index is a |
---|
| 727 | !> multiple of 128). That's why work_ffty_vec is dimensioned as |
---|
| 728 | !> 0:ny+1. |
---|
| 729 | !> Of course, this will not work if users are using an odd number |
---|
| 730 | !> of gridpoints along y. |
---|
[1] | 731 | !------------------------------------------------------------------------------! |
---|
[1682] | 732 | SUBROUTINE ffty_tr_yx( f_in, f_out ) |
---|
[1] | 733 | |
---|
[1682] | 734 | |
---|
[1320] | 735 | USE control_parameters, & |
---|
| 736 | ONLY: host |
---|
| 737 | |
---|
| 738 | USE cpulog, & |
---|
| 739 | ONLY: cpu_log, log_point_s |
---|
| 740 | |
---|
| 741 | USE kinds |
---|
| 742 | |
---|
[1] | 743 | USE pegrid |
---|
| 744 | |
---|
| 745 | IMPLICIT NONE |
---|
| 746 | |
---|
[1682] | 747 | INTEGER(iwp) :: i !< |
---|
| 748 | INTEGER(iwp) :: iend !< |
---|
| 749 | INTEGER(iwp) :: iouter !< |
---|
| 750 | INTEGER(iwp) :: ir !< |
---|
| 751 | INTEGER(iwp) :: j !< |
---|
| 752 | INTEGER(iwp) :: k !< |
---|
[1] | 753 | |
---|
[1682] | 754 | INTEGER(iwp), PARAMETER :: stridex = 4 !< |
---|
[1320] | 755 | |
---|
[1682] | 756 | REAL(wp), DIMENSION(0:ny,stridex) :: work_ffty !< |
---|
[1] | 757 | #if defined( __nec ) |
---|
[1682] | 758 | REAL(wp), DIMENSION(0:ny+1,1:nz,nxl:nxr) :: work_ffty_vec !< |
---|
[1] | 759 | #endif |
---|
[1682] | 760 | REAL(wp), DIMENSION(1:nz,0:ny,nxl:nxr) :: f_in !< |
---|
| 761 | REAL(wp), DIMENSION(nnx,1:nz,nys_x:nyn_x,pdims(1)) :: f_out !< |
---|
| 762 | REAL(wp), DIMENSION(nxl:nxr,1:nz,0:ny) :: work !< |
---|
[1] | 763 | |
---|
| 764 | ! |
---|
| 765 | !-- Carry out the FFT along y, where all data are present due to the |
---|
| 766 | !-- 1d-decomposition along x. Resort the data in a way that x becomes |
---|
| 767 | !-- the first index. |
---|
[1106] | 768 | CALL cpu_log( log_point_s(7), 'fft_y_1d', 'start' ) |
---|
[1] | 769 | |
---|
| 770 | IF ( host(1:3) == 'nec' ) THEN |
---|
| 771 | #if defined( __nec ) |
---|
| 772 | ! |
---|
| 773 | !-- Code optimized for vector processors |
---|
[85] | 774 | !$OMP PARALLEL PRIVATE ( i, j, k ) |
---|
[1] | 775 | !$OMP DO |
---|
| 776 | DO i = nxl, nxr |
---|
| 777 | |
---|
| 778 | DO j = 0, ny |
---|
| 779 | DO k = 1, nz |
---|
| 780 | work_ffty_vec(j,k,i) = f_in(k,j,i) |
---|
| 781 | ENDDO |
---|
| 782 | ENDDO |
---|
| 783 | |
---|
| 784 | CALL fft_y_m( work_ffty_vec(:,:,i), ny+1, 'forward' ) |
---|
| 785 | |
---|
| 786 | ENDDO |
---|
| 787 | |
---|
| 788 | !$OMP DO |
---|
| 789 | DO k = 1, nz |
---|
| 790 | DO j = 0, ny |
---|
| 791 | DO i = nxl, nxr |
---|
| 792 | work(i,k,j) = work_ffty_vec(j,k,i) |
---|
| 793 | ENDDO |
---|
| 794 | ENDDO |
---|
| 795 | ENDDO |
---|
| 796 | !$OMP END PARALLEL |
---|
| 797 | #endif |
---|
| 798 | |
---|
| 799 | ELSE |
---|
| 800 | |
---|
| 801 | ! |
---|
| 802 | !-- Cache optimized code. |
---|
| 803 | !-- The i-(x-)direction is split into a strided outer loop and an inner |
---|
| 804 | !-- loop for better cache performance |
---|
| 805 | !$OMP PARALLEL PRIVATE (i,iend,iouter,ir,j,k,work_ffty) |
---|
| 806 | !$OMP DO |
---|
| 807 | DO iouter = nxl, nxr, stridex |
---|
| 808 | |
---|
| 809 | iend = MIN( iouter+stridex-1, nxr ) ! Upper bound for inner i loop |
---|
| 810 | |
---|
| 811 | DO k = 1, nz |
---|
| 812 | |
---|
| 813 | DO i = iouter, iend |
---|
| 814 | |
---|
| 815 | ir = i-iouter+1 ! counter within a stride |
---|
| 816 | DO j = 0, ny |
---|
| 817 | work_ffty(j,ir) = f_in(k,j,i) |
---|
| 818 | ENDDO |
---|
| 819 | ! |
---|
| 820 | !-- FFT along y |
---|
[1106] | 821 | CALL fft_y_1d( work_ffty(:,ir), 'forward' ) |
---|
[1] | 822 | |
---|
| 823 | ENDDO |
---|
| 824 | |
---|
| 825 | ! |
---|
| 826 | !-- Resort |
---|
| 827 | DO j = 0, ny |
---|
| 828 | DO i = iouter, iend |
---|
| 829 | work(i,k,j) = work_ffty(j,i-iouter+1) |
---|
| 830 | ENDDO |
---|
| 831 | ENDDO |
---|
| 832 | |
---|
| 833 | ENDDO |
---|
| 834 | |
---|
| 835 | ENDDO |
---|
| 836 | !$OMP END PARALLEL |
---|
| 837 | |
---|
| 838 | ENDIF |
---|
[1106] | 839 | CALL cpu_log( log_point_s(7), 'fft_y_1d', 'pause' ) |
---|
[1] | 840 | |
---|
| 841 | ! |
---|
| 842 | !-- Transpose array |
---|
[1111] | 843 | #if defined( __parallel ) |
---|
[1] | 844 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'start' ) |
---|
[622] | 845 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
---|
[1] | 846 | CALL MPI_ALLTOALL( work(nxl,1,0), sendrecvcount_xy, MPI_REAL, & |
---|
| 847 | f_out(1,1,nys_x,1), sendrecvcount_xy, MPI_REAL, & |
---|
| 848 | comm1dx, ierr ) |
---|
| 849 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'stop' ) |
---|
[1111] | 850 | #endif |
---|
[1] | 851 | |
---|
| 852 | END SUBROUTINE ffty_tr_yx |
---|
| 853 | |
---|
| 854 | |
---|
| 855 | !------------------------------------------------------------------------------! |
---|
[1682] | 856 | ! Description: |
---|
| 857 | ! ------------ |
---|
| 858 | !> Transposition x --> y with a subsequent backward Fourier transformation for |
---|
| 859 | !> a 1d-decomposition along x |
---|
[1] | 860 | !------------------------------------------------------------------------------! |
---|
[1682] | 861 | SUBROUTINE tr_xy_ffty( f_in, f_out ) |
---|
[1] | 862 | |
---|
[1682] | 863 | |
---|
[1320] | 864 | USE control_parameters, & |
---|
| 865 | ONLY: host |
---|
| 866 | |
---|
| 867 | USE cpulog, & |
---|
| 868 | ONLY: cpu_log, log_point_s |
---|
| 869 | |
---|
| 870 | USE kinds |
---|
| 871 | |
---|
[1] | 872 | USE pegrid |
---|
| 873 | |
---|
| 874 | IMPLICIT NONE |
---|
| 875 | |
---|
[1682] | 876 | INTEGER(iwp) :: i !< |
---|
| 877 | INTEGER(iwp) :: iend !< |
---|
| 878 | INTEGER(iwp) :: iouter !< |
---|
| 879 | INTEGER(iwp) :: ir !< |
---|
| 880 | INTEGER(iwp) :: j !< |
---|
| 881 | INTEGER(iwp) :: k !< |
---|
[1] | 882 | |
---|
[1682] | 883 | INTEGER(iwp), PARAMETER :: stridex = 4 !< |
---|
[1320] | 884 | |
---|
[1682] | 885 | REAL(wp), DIMENSION(0:ny,stridex) :: work_ffty !< |
---|
[1] | 886 | #if defined( __nec ) |
---|
[1682] | 887 | REAL(wp), DIMENSION(0:ny+1,1:nz,nxl:nxr) :: work_ffty_vec !< |
---|
[1] | 888 | #endif |
---|
[1682] | 889 | REAL(wp), DIMENSION(nnx,1:nz,nys_x:nyn_x,pdims(1)) :: f_in !< |
---|
| 890 | REAL(wp), DIMENSION(1:nz,0:ny,nxl:nxr) :: f_out !< |
---|
| 891 | REAL(wp), DIMENSION(nxl:nxr,1:nz,0:ny) :: work !< |
---|
[1] | 892 | |
---|
| 893 | ! |
---|
| 894 | !-- Transpose array |
---|
[1111] | 895 | #if defined( __parallel ) |
---|
[1] | 896 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'start' ) |
---|
[622] | 897 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
---|
[1] | 898 | CALL MPI_ALLTOALL( f_in(1,1,nys_x,1), sendrecvcount_xy, MPI_REAL, & |
---|
| 899 | work(nxl,1,0), sendrecvcount_xy, MPI_REAL, & |
---|
| 900 | comm1dx, ierr ) |
---|
| 901 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'stop' ) |
---|
[1111] | 902 | #endif |
---|
[1] | 903 | |
---|
| 904 | ! |
---|
| 905 | !-- Resort the data in a way that y becomes the first index and carry out the |
---|
| 906 | !-- backward fft along y. |
---|
[1106] | 907 | CALL cpu_log( log_point_s(7), 'fft_y_1d', 'continue' ) |
---|
[1] | 908 | |
---|
| 909 | IF ( host(1:3) == 'nec' ) THEN |
---|
| 910 | #if defined( __nec ) |
---|
| 911 | ! |
---|
| 912 | !-- Code optimized for vector processors |
---|
[85] | 913 | !$OMP PARALLEL PRIVATE ( i, j, k ) |
---|
[1] | 914 | !$OMP DO |
---|
| 915 | DO k = 1, nz |
---|
| 916 | DO j = 0, ny |
---|
| 917 | DO i = nxl, nxr |
---|
| 918 | work_ffty_vec(j,k,i) = work(i,k,j) |
---|
| 919 | ENDDO |
---|
| 920 | ENDDO |
---|
| 921 | ENDDO |
---|
| 922 | |
---|
| 923 | !$OMP DO |
---|
| 924 | DO i = nxl, nxr |
---|
| 925 | |
---|
| 926 | CALL fft_y_m( work_ffty_vec(:,:,i), ny+1, 'backward' ) |
---|
| 927 | |
---|
| 928 | DO j = 0, ny |
---|
| 929 | DO k = 1, nz |
---|
| 930 | f_out(k,j,i) = work_ffty_vec(j,k,i) |
---|
| 931 | ENDDO |
---|
| 932 | ENDDO |
---|
| 933 | |
---|
| 934 | ENDDO |
---|
| 935 | !$OMP END PARALLEL |
---|
| 936 | #endif |
---|
| 937 | |
---|
| 938 | ELSE |
---|
| 939 | |
---|
| 940 | ! |
---|
| 941 | !-- Cache optimized code. |
---|
| 942 | !-- The i-(x-)direction is split into a strided outer loop and an inner |
---|
| 943 | !-- loop for better cache performance |
---|
| 944 | !$OMP PARALLEL PRIVATE ( i, iend, iouter, ir, j, k, work_ffty ) |
---|
| 945 | !$OMP DO |
---|
| 946 | DO iouter = nxl, nxr, stridex |
---|
| 947 | |
---|
| 948 | iend = MIN( iouter+stridex-1, nxr ) ! Upper bound for inner i loop |
---|
| 949 | |
---|
| 950 | DO k = 1, nz |
---|
| 951 | ! |
---|
| 952 | !-- Resort |
---|
| 953 | DO j = 0, ny |
---|
| 954 | DO i = iouter, iend |
---|
| 955 | work_ffty(j,i-iouter+1) = work(i,k,j) |
---|
| 956 | ENDDO |
---|
| 957 | ENDDO |
---|
| 958 | |
---|
| 959 | DO i = iouter, iend |
---|
| 960 | |
---|
| 961 | ! |
---|
| 962 | !-- FFT along y |
---|
| 963 | ir = i-iouter+1 ! counter within a stride |
---|
[1106] | 964 | CALL fft_y_1d( work_ffty(:,ir), 'backward' ) |
---|
[1] | 965 | |
---|
| 966 | DO j = 0, ny |
---|
| 967 | f_out(k,j,i) = work_ffty(j,ir) |
---|
| 968 | ENDDO |
---|
| 969 | ENDDO |
---|
| 970 | |
---|
| 971 | ENDDO |
---|
| 972 | |
---|
| 973 | ENDDO |
---|
| 974 | !$OMP END PARALLEL |
---|
| 975 | |
---|
| 976 | ENDIF |
---|
| 977 | |
---|
[1106] | 978 | CALL cpu_log( log_point_s(7), 'fft_y_1d', 'stop' ) |
---|
[1] | 979 | |
---|
| 980 | END SUBROUTINE tr_xy_ffty |
---|
| 981 | |
---|
| 982 | |
---|
| 983 | !------------------------------------------------------------------------------! |
---|
[1682] | 984 | ! Description: |
---|
| 985 | ! ------------ |
---|
| 986 | !> FFT along x, solution of the tridiagonal system and backward FFT for |
---|
| 987 | !> a 1d-decomposition along x |
---|
| 988 | !> |
---|
| 989 | !> @warning this subroutine may still not work for hybrid parallelization |
---|
| 990 | !> with OpenMP (for possible necessary changes see the original |
---|
| 991 | !> routine poisfft_hybrid, developed by Klaus Ketelsen, May 2002) |
---|
[1] | 992 | !------------------------------------------------------------------------------! |
---|
[1682] | 993 | SUBROUTINE fftx_tri_fftx( ar ) |
---|
[1] | 994 | |
---|
[1682] | 995 | |
---|
[1320] | 996 | USE control_parameters, & |
---|
| 997 | ONLY: host |
---|
| 998 | |
---|
| 999 | USE cpulog, & |
---|
| 1000 | ONLY: cpu_log, log_point_s |
---|
| 1001 | |
---|
| 1002 | USE grid_variables, & |
---|
| 1003 | ONLY: ddx2, ddy2 |
---|
| 1004 | |
---|
| 1005 | USE kinds |
---|
| 1006 | |
---|
[1] | 1007 | USE pegrid |
---|
| 1008 | |
---|
| 1009 | IMPLICIT NONE |
---|
| 1010 | |
---|
[1682] | 1011 | INTEGER(iwp) :: i !< |
---|
| 1012 | INTEGER(iwp) :: j !< |
---|
| 1013 | INTEGER(iwp) :: k !< |
---|
| 1014 | INTEGER(iwp) :: m !< |
---|
| 1015 | INTEGER(iwp) :: n !< |
---|
| 1016 | INTEGER(iwp) :: omp_get_thread_num !< |
---|
| 1017 | INTEGER(iwp) :: tn !< |
---|
[1] | 1018 | |
---|
[1682] | 1019 | REAL(wp), DIMENSION(0:nx) :: work_fftx !< |
---|
| 1020 | REAL(wp), DIMENSION(0:nx,1:nz) :: work_trix !< |
---|
| 1021 | REAL(wp), DIMENSION(nnx,1:nz,nys_x:nyn_x,pdims(1)) :: ar !< |
---|
| 1022 | REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: tri !< |
---|
[1] | 1023 | |
---|
| 1024 | |
---|
[1106] | 1025 | CALL cpu_log( log_point_s(33), 'fft_x_1d + tridia', 'start' ) |
---|
[1] | 1026 | |
---|
| 1027 | ALLOCATE( tri(5,0:nx,0:nz-1,0:threads_per_task-1) ) |
---|
| 1028 | |
---|
| 1029 | tn = 0 ! Default thread number in case of one thread |
---|
| 1030 | !$OMP PARALLEL DO PRIVATE ( i, j, k, m, n, tn, work_fftx, work_trix ) |
---|
| 1031 | DO j = nys_x, nyn_x |
---|
| 1032 | |
---|
| 1033 | !$ tn = omp_get_thread_num() |
---|
| 1034 | |
---|
| 1035 | IF ( host(1:3) == 'nec' ) THEN |
---|
| 1036 | ! |
---|
| 1037 | !-- Code optimized for vector processors |
---|
| 1038 | DO k = 1, nz |
---|
| 1039 | |
---|
| 1040 | m = 0 |
---|
| 1041 | DO n = 1, pdims(1) |
---|
[1003] | 1042 | DO i = 1, nnx |
---|
[1] | 1043 | work_trix(m,k) = ar(i,k,j,n) |
---|
| 1044 | m = m + 1 |
---|
| 1045 | ENDDO |
---|
| 1046 | ENDDO |
---|
| 1047 | |
---|
| 1048 | ENDDO |
---|
| 1049 | |
---|
| 1050 | CALL fft_x_m( work_trix, 'forward' ) |
---|
| 1051 | |
---|
| 1052 | ELSE |
---|
| 1053 | ! |
---|
| 1054 | !-- Cache optimized code |
---|
| 1055 | DO k = 1, nz |
---|
| 1056 | |
---|
| 1057 | m = 0 |
---|
| 1058 | DO n = 1, pdims(1) |
---|
[1003] | 1059 | DO i = 1, nnx |
---|
[1] | 1060 | work_fftx(m) = ar(i,k,j,n) |
---|
| 1061 | m = m + 1 |
---|
| 1062 | ENDDO |
---|
| 1063 | ENDDO |
---|
| 1064 | |
---|
[1106] | 1065 | CALL fft_x_1d( work_fftx, 'forward' ) |
---|
[1] | 1066 | |
---|
| 1067 | DO i = 0, nx |
---|
| 1068 | work_trix(i,k) = work_fftx(i) |
---|
| 1069 | ENDDO |
---|
| 1070 | |
---|
| 1071 | ENDDO |
---|
| 1072 | |
---|
| 1073 | ENDIF |
---|
| 1074 | |
---|
| 1075 | ! |
---|
| 1076 | !-- Solve the linear equation system |
---|
| 1077 | CALL tridia_1dd( ddx2, ddy2, nx, ny, j, work_trix, tri(:,:,:,tn) ) |
---|
| 1078 | |
---|
| 1079 | IF ( host(1:3) == 'nec' ) THEN |
---|
| 1080 | ! |
---|
| 1081 | !-- Code optimized for vector processors |
---|
| 1082 | CALL fft_x_m( work_trix, 'backward' ) |
---|
| 1083 | |
---|
| 1084 | DO k = 1, nz |
---|
| 1085 | |
---|
| 1086 | m = 0 |
---|
| 1087 | DO n = 1, pdims(1) |
---|
[1003] | 1088 | DO i = 1, nnx |
---|
[1] | 1089 | ar(i,k,j,n) = work_trix(m,k) |
---|
| 1090 | m = m + 1 |
---|
| 1091 | ENDDO |
---|
| 1092 | ENDDO |
---|
| 1093 | |
---|
| 1094 | ENDDO |
---|
| 1095 | |
---|
| 1096 | ELSE |
---|
| 1097 | ! |
---|
| 1098 | !-- Cache optimized code |
---|
| 1099 | DO k = 1, nz |
---|
| 1100 | |
---|
| 1101 | DO i = 0, nx |
---|
| 1102 | work_fftx(i) = work_trix(i,k) |
---|
| 1103 | ENDDO |
---|
| 1104 | |
---|
[1106] | 1105 | CALL fft_x_1d( work_fftx, 'backward' ) |
---|
[1] | 1106 | |
---|
| 1107 | m = 0 |
---|
| 1108 | DO n = 1, pdims(1) |
---|
[1003] | 1109 | DO i = 1, nnx |
---|
[1] | 1110 | ar(i,k,j,n) = work_fftx(m) |
---|
| 1111 | m = m + 1 |
---|
| 1112 | ENDDO |
---|
| 1113 | ENDDO |
---|
| 1114 | |
---|
| 1115 | ENDDO |
---|
| 1116 | |
---|
| 1117 | ENDIF |
---|
| 1118 | |
---|
| 1119 | ENDDO |
---|
| 1120 | |
---|
| 1121 | DEALLOCATE( tri ) |
---|
| 1122 | |
---|
[1106] | 1123 | CALL cpu_log( log_point_s(33), 'fft_x_1d + tridia', 'stop' ) |
---|
[1] | 1124 | |
---|
| 1125 | END SUBROUTINE fftx_tri_fftx |
---|
| 1126 | |
---|
| 1127 | |
---|
| 1128 | !------------------------------------------------------------------------------! |
---|
[1682] | 1129 | ! Description: |
---|
| 1130 | ! ------------ |
---|
| 1131 | !> Fourier-transformation along x with subsequent transposition x --> y for |
---|
| 1132 | !> a 1d-decomposition along y. |
---|
| 1133 | !> |
---|
| 1134 | !> @attention NEC-branch of this routine may significantly profit from |
---|
| 1135 | !> further optimizations. So far, performance is much worse than |
---|
| 1136 | !> for routine ffty_tr_yx (more than three times slower). |
---|
[1] | 1137 | !------------------------------------------------------------------------------! |
---|
[1682] | 1138 | SUBROUTINE fftx_tr_xy( f_in, f_out ) |
---|
[1] | 1139 | |
---|
[1682] | 1140 | |
---|
[1320] | 1141 | USE control_parameters, & |
---|
| 1142 | ONLY: host |
---|
| 1143 | |
---|
| 1144 | USE cpulog, & |
---|
| 1145 | ONLY: cpu_log, log_point_s |
---|
| 1146 | |
---|
| 1147 | USE kinds |
---|
| 1148 | |
---|
[1] | 1149 | USE pegrid |
---|
| 1150 | |
---|
| 1151 | IMPLICIT NONE |
---|
| 1152 | |
---|
[1682] | 1153 | INTEGER(iwp) :: i !< |
---|
| 1154 | INTEGER(iwp) :: j !< |
---|
| 1155 | INTEGER(iwp) :: k !< |
---|
[1] | 1156 | |
---|
[1682] | 1157 | REAL(wp), DIMENSION(0:nx,1:nz,nys:nyn) :: work_fftx !< |
---|
| 1158 | REAL(wp), DIMENSION(1:nz,nys:nyn,0:nx) :: f_in !< |
---|
| 1159 | REAL(wp), DIMENSION(nny,1:nz,nxl_y:nxr_y,pdims(2)) :: f_out !< |
---|
| 1160 | REAL(wp), DIMENSION(nys:nyn,1:nz,0:nx) :: work !< |
---|
[1] | 1161 | |
---|
| 1162 | ! |
---|
| 1163 | !-- Carry out the FFT along x, where all data are present due to the |
---|
| 1164 | !-- 1d-decomposition along y. Resort the data in a way that y becomes |
---|
| 1165 | !-- the first index. |
---|
[1106] | 1166 | CALL cpu_log( log_point_s(4), 'fft_x_1d', 'start' ) |
---|
[1] | 1167 | |
---|
| 1168 | IF ( host(1:3) == 'nec' ) THEN |
---|
| 1169 | ! |
---|
| 1170 | !-- Code for vector processors |
---|
[85] | 1171 | !$OMP PARALLEL PRIVATE ( i, j, k ) |
---|
[1] | 1172 | !$OMP DO |
---|
| 1173 | DO i = 0, nx |
---|
| 1174 | |
---|
| 1175 | DO j = nys, nyn |
---|
| 1176 | DO k = 1, nz |
---|
| 1177 | work_fftx(i,k,j) = f_in(k,j,i) |
---|
| 1178 | ENDDO |
---|
| 1179 | ENDDO |
---|
| 1180 | |
---|
| 1181 | ENDDO |
---|
| 1182 | |
---|
| 1183 | !$OMP DO |
---|
| 1184 | DO j = nys, nyn |
---|
| 1185 | |
---|
| 1186 | CALL fft_x_m( work_fftx(:,:,j), 'forward' ) |
---|
| 1187 | |
---|
| 1188 | DO k = 1, nz |
---|
| 1189 | DO i = 0, nx |
---|
| 1190 | work(j,k,i) = work_fftx(i,k,j) |
---|
| 1191 | ENDDO |
---|
| 1192 | ENDDO |
---|
| 1193 | |
---|
| 1194 | ENDDO |
---|
| 1195 | !$OMP END PARALLEL |
---|
| 1196 | |
---|
| 1197 | ELSE |
---|
| 1198 | |
---|
| 1199 | ! |
---|
| 1200 | !-- Cache optimized code (there might be still a potential for better |
---|
| 1201 | !-- optimization). |
---|
[696] | 1202 | !$OMP PARALLEL PRIVATE (i,j,k) |
---|
[1] | 1203 | !$OMP DO |
---|
| 1204 | DO i = 0, nx |
---|
| 1205 | |
---|
| 1206 | DO j = nys, nyn |
---|
| 1207 | DO k = 1, nz |
---|
| 1208 | work_fftx(i,k,j) = f_in(k,j,i) |
---|
| 1209 | ENDDO |
---|
| 1210 | ENDDO |
---|
| 1211 | |
---|
| 1212 | ENDDO |
---|
| 1213 | |
---|
| 1214 | !$OMP DO |
---|
| 1215 | DO j = nys, nyn |
---|
| 1216 | DO k = 1, nz |
---|
| 1217 | |
---|
[1106] | 1218 | CALL fft_x_1d( work_fftx(0:nx,k,j), 'forward' ) |
---|
[1] | 1219 | |
---|
| 1220 | DO i = 0, nx |
---|
| 1221 | work(j,k,i) = work_fftx(i,k,j) |
---|
| 1222 | ENDDO |
---|
| 1223 | ENDDO |
---|
| 1224 | |
---|
| 1225 | ENDDO |
---|
| 1226 | !$OMP END PARALLEL |
---|
| 1227 | |
---|
| 1228 | ENDIF |
---|
[1106] | 1229 | CALL cpu_log( log_point_s(4), 'fft_x_1d', 'pause' ) |
---|
[1] | 1230 | |
---|
| 1231 | ! |
---|
| 1232 | !-- Transpose array |
---|
[1111] | 1233 | #if defined( __parallel ) |
---|
[1] | 1234 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'start' ) |
---|
[622] | 1235 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
---|
[1] | 1236 | CALL MPI_ALLTOALL( work(nys,1,0), sendrecvcount_xy, MPI_REAL, & |
---|
| 1237 | f_out(1,1,nxl_y,1), sendrecvcount_xy, MPI_REAL, & |
---|
| 1238 | comm1dy, ierr ) |
---|
| 1239 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'stop' ) |
---|
[1111] | 1240 | #endif |
---|
[1] | 1241 | |
---|
| 1242 | END SUBROUTINE fftx_tr_xy |
---|
| 1243 | |
---|
| 1244 | |
---|
| 1245 | !------------------------------------------------------------------------------! |
---|
[1682] | 1246 | ! Description: |
---|
| 1247 | ! ------------ |
---|
| 1248 | !> Transposition y --> x with a subsequent backward Fourier transformation for |
---|
| 1249 | !> a 1d-decomposition along x. |
---|
[1] | 1250 | !------------------------------------------------------------------------------! |
---|
[1682] | 1251 | SUBROUTINE tr_yx_fftx( f_in, f_out ) |
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[1] | 1252 | |
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[1682] | 1253 | |
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[1320] | 1254 | USE control_parameters, & |
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| 1255 | ONLY: host |
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| 1256 | |
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| 1257 | USE cpulog, & |
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| 1258 | ONLY: cpu_log, log_point_s |
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| 1259 | |
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| 1260 | USE kinds |
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| 1261 | |
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[1] | 1262 | USE pegrid |
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| 1263 | |
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| 1264 | IMPLICIT NONE |
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| 1265 | |
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[1682] | 1266 | INTEGER(iwp) :: i !< |
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| 1267 | INTEGER(iwp) :: j !< |
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| 1268 | INTEGER(iwp) :: k !< |
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[1] | 1269 | |
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[1682] | 1270 | REAL(wp), DIMENSION(0:nx,1:nz,nys:nyn) :: work_fftx !< |
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| 1271 | REAL(wp), DIMENSION(nny,1:nz,nxl_y:nxr_y,pdims(2)) :: f_in !< |
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| 1272 | REAL(wp), DIMENSION(1:nz,nys:nyn,0:nx) :: f_out !< |
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| 1273 | REAL(wp), DIMENSION(nys:nyn,1:nz,0:nx) :: work !< |
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[1] | 1274 | |
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| 1275 | ! |
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| 1276 | !-- Transpose array |
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[1111] | 1277 | #if defined( __parallel ) |
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[1] | 1278 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'start' ) |
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[622] | 1279 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
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[1] | 1280 | CALL MPI_ALLTOALL( f_in(1,1,nxl_y,1), sendrecvcount_xy, MPI_REAL, & |
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| 1281 | work(nys,1,0), sendrecvcount_xy, MPI_REAL, & |
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| 1282 | comm1dy, ierr ) |
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| 1283 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'stop' ) |
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[1111] | 1284 | #endif |
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[1] | 1285 | |
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| 1286 | ! |
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| 1287 | !-- Carry out the FFT along x, where all data are present due to the |
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| 1288 | !-- 1d-decomposition along y. Resort the data in a way that y becomes |
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| 1289 | !-- the first index. |
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[1106] | 1290 | CALL cpu_log( log_point_s(4), 'fft_x_1d', 'continue' ) |
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[1] | 1291 | |
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| 1292 | IF ( host(1:3) == 'nec' ) THEN |
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| 1293 | ! |
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| 1294 | !-- Code optimized for vector processors |
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[85] | 1295 | !$OMP PARALLEL PRIVATE ( i, j, k ) |
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[1] | 1296 | !$OMP DO |
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| 1297 | DO j = nys, nyn |
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| 1298 | |
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| 1299 | DO k = 1, nz |
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| 1300 | DO i = 0, nx |
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| 1301 | work_fftx(i,k,j) = work(j,k,i) |
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| 1302 | ENDDO |
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| 1303 | ENDDO |
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| 1304 | |
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| 1305 | CALL fft_x_m( work_fftx(:,:,j), 'backward' ) |
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| 1306 | |
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| 1307 | ENDDO |
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| 1308 | |
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| 1309 | !$OMP DO |
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| 1310 | DO i = 0, nx |
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| 1311 | DO j = nys, nyn |
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| 1312 | DO k = 1, nz |
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| 1313 | f_out(k,j,i) = work_fftx(i,k,j) |
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| 1314 | ENDDO |
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| 1315 | ENDDO |
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| 1316 | ENDDO |
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| 1317 | !$OMP END PARALLEL |
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| 1318 | |
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| 1319 | ELSE |
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| 1320 | |
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| 1321 | ! |
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| 1322 | !-- Cache optimized code (there might be still a potential for better |
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| 1323 | !-- optimization). |
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[696] | 1324 | !$OMP PARALLEL PRIVATE (i,j,k) |
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[1] | 1325 | !$OMP DO |
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| 1326 | DO j = nys, nyn |
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| 1327 | DO k = 1, nz |
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| 1328 | |
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| 1329 | DO i = 0, nx |
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| 1330 | work_fftx(i,k,j) = work(j,k,i) |
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| 1331 | ENDDO |
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| 1332 | |
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[1106] | 1333 | CALL fft_x_1d( work_fftx(0:nx,k,j), 'backward' ) |
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[1] | 1334 | |
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| 1335 | ENDDO |
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| 1336 | ENDDO |
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| 1337 | |
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| 1338 | !$OMP DO |
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| 1339 | DO i = 0, nx |
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| 1340 | DO j = nys, nyn |
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| 1341 | DO k = 1, nz |
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| 1342 | f_out(k,j,i) = work_fftx(i,k,j) |
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| 1343 | ENDDO |
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| 1344 | ENDDO |
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| 1345 | ENDDO |
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| 1346 | !$OMP END PARALLEL |
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| 1347 | |
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| 1348 | ENDIF |
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[1106] | 1349 | CALL cpu_log( log_point_s(4), 'fft_x_1d', 'stop' ) |
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[1] | 1350 | |
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| 1351 | END SUBROUTINE tr_yx_fftx |
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| 1352 | |
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| 1353 | |
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| 1354 | !------------------------------------------------------------------------------! |
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[1682] | 1355 | ! Description: |
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| 1356 | ! ------------ |
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| 1357 | !> FFT along y, solution of the tridiagonal system and backward FFT for |
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| 1358 | !> a 1d-decomposition along y. |
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| 1359 | !> |
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| 1360 | !> @warning this subroutine may still not work for hybrid parallelization |
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| 1361 | !> with OpenMP (for possible necessary changes see the original |
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| 1362 | !> routine poisfft_hybrid, developed by Klaus Ketelsen, May 2002) |
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[1] | 1363 | !------------------------------------------------------------------------------! |
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[1682] | 1364 | SUBROUTINE ffty_tri_ffty( ar ) |
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[1] | 1365 | |
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[1682] | 1366 | |
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[1320] | 1367 | USE control_parameters, & |
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| 1368 | ONLY: host |
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| 1369 | |
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| 1370 | USE cpulog, & |
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| 1371 | ONLY: cpu_log, log_point_s |
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| 1372 | |
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| 1373 | USE grid_variables, & |
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| 1374 | ONLY: ddx2, ddy2 |
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| 1375 | |
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| 1376 | USE kinds |
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| 1377 | |
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[1] | 1378 | USE pegrid |
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| 1379 | |
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| 1380 | IMPLICIT NONE |
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| 1381 | |
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[1682] | 1382 | INTEGER(iwp) :: i !< |
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| 1383 | INTEGER(iwp) :: j !< |
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| 1384 | INTEGER(iwp) :: k !< |
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| 1385 | INTEGER(iwp) :: m !< |
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| 1386 | INTEGER(iwp) :: n !< |
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| 1387 | INTEGER(iwp) :: omp_get_thread_num !< |
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| 1388 | INTEGER(iwp) :: tn !< |
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[1] | 1389 | |
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[1682] | 1390 | REAL(wp), DIMENSION(0:ny) :: work_ffty !< |
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| 1391 | REAL(wp), DIMENSION(0:ny,1:nz) :: work_triy !< |
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| 1392 | REAL(wp), DIMENSION(nny,1:nz,nxl_y:nxr_y,pdims(2)) :: ar !< |
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| 1393 | REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: tri !< |
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[1] | 1394 | |
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| 1395 | |
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[1106] | 1396 | CALL cpu_log( log_point_s(39), 'fft_y_1d + tridia', 'start' ) |
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[1] | 1397 | |
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| 1398 | ALLOCATE( tri(5,0:ny,0:nz-1,0:threads_per_task-1) ) |
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| 1399 | |
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| 1400 | tn = 0 ! Default thread number in case of one thread |
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[696] | 1401 | !$OMP PARALLEL DO PRIVATE ( i, j, k, m, n, tn, work_ffty, work_triy ) |
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[1] | 1402 | DO i = nxl_y, nxr_y |
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| 1403 | |
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| 1404 | !$ tn = omp_get_thread_num() |
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| 1405 | |
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| 1406 | IF ( host(1:3) == 'nec' ) THEN |
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| 1407 | ! |
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| 1408 | !-- Code optimized for vector processors |
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| 1409 | DO k = 1, nz |
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| 1410 | |
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| 1411 | m = 0 |
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| 1412 | DO n = 1, pdims(2) |
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[1003] | 1413 | DO j = 1, nny |
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[1] | 1414 | work_triy(m,k) = ar(j,k,i,n) |
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| 1415 | m = m + 1 |
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| 1416 | ENDDO |
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| 1417 | ENDDO |
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| 1418 | |
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| 1419 | ENDDO |
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| 1420 | |
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| 1421 | CALL fft_y_m( work_triy, ny, 'forward' ) |
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| 1422 | |
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| 1423 | ELSE |
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| 1424 | ! |
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| 1425 | !-- Cache optimized code |
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| 1426 | DO k = 1, nz |
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| 1427 | |
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| 1428 | m = 0 |
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| 1429 | DO n = 1, pdims(2) |
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[1003] | 1430 | DO j = 1, nny |
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[1] | 1431 | work_ffty(m) = ar(j,k,i,n) |
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| 1432 | m = m + 1 |
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| 1433 | ENDDO |
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| 1434 | ENDDO |
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| 1435 | |
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[1106] | 1436 | CALL fft_y_1d( work_ffty, 'forward' ) |
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[1] | 1437 | |
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| 1438 | DO j = 0, ny |
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| 1439 | work_triy(j,k) = work_ffty(j) |
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| 1440 | ENDDO |
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| 1441 | |
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| 1442 | ENDDO |
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| 1443 | |
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| 1444 | ENDIF |
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| 1445 | |
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| 1446 | ! |
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| 1447 | !-- Solve the linear equation system |
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| 1448 | CALL tridia_1dd( ddy2, ddx2, ny, nx, i, work_triy, tri(:,:,:,tn) ) |
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| 1449 | |
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| 1450 | IF ( host(1:3) == 'nec' ) THEN |
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| 1451 | ! |
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| 1452 | !-- Code optimized for vector processors |
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| 1453 | CALL fft_y_m( work_triy, ny, 'backward' ) |
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| 1454 | |
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| 1455 | DO k = 1, nz |
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| 1456 | |
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| 1457 | m = 0 |
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| 1458 | DO n = 1, pdims(2) |
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[1003] | 1459 | DO j = 1, nny |
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[1] | 1460 | ar(j,k,i,n) = work_triy(m,k) |
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| 1461 | m = m + 1 |
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| 1462 | ENDDO |
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| 1463 | ENDDO |
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| 1464 | |
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| 1465 | ENDDO |
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| 1466 | |
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| 1467 | ELSE |
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| 1468 | ! |
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| 1469 | !-- Cache optimized code |
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| 1470 | DO k = 1, nz |
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| 1471 | |
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| 1472 | DO j = 0, ny |
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| 1473 | work_ffty(j) = work_triy(j,k) |
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| 1474 | ENDDO |
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| 1475 | |
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[1106] | 1476 | CALL fft_y_1d( work_ffty, 'backward' ) |
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[1] | 1477 | |
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| 1478 | m = 0 |
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| 1479 | DO n = 1, pdims(2) |
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[1003] | 1480 | DO j = 1, nny |
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[1] | 1481 | ar(j,k,i,n) = work_ffty(m) |
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| 1482 | m = m + 1 |
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| 1483 | ENDDO |
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| 1484 | ENDDO |
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| 1485 | |
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| 1486 | ENDDO |
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| 1487 | |
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| 1488 | ENDIF |
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| 1489 | |
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| 1490 | ENDDO |
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| 1491 | |
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| 1492 | DEALLOCATE( tri ) |
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| 1493 | |
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[1106] | 1494 | CALL cpu_log( log_point_s(39), 'fft_y_1d + tridia', 'stop' ) |
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[1] | 1495 | |
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| 1496 | END SUBROUTINE ffty_tri_ffty |
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| 1497 | |
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| 1498 | #endif |
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| 1499 | |
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| 1500 | END MODULE poisfft_mod |
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