1 | !> @file poisfft_mod.f90 |
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2 | !------------------------------------------------------------------------------! |
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3 | ! This file is part of PALM. |
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4 | ! |
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5 | ! PALM is free software: you can redistribute it and/or modify it under the |
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6 | ! terms of the GNU General Public License as published by the Free Software |
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7 | ! Foundation, either version 3 of the License, or (at your option) any later |
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8 | ! version. |
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9 | ! |
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10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
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11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
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12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
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13 | ! |
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14 | ! You should have received a copy of the GNU General Public License along with |
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15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
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16 | ! |
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17 | ! Copyright 1997-2016 Leibniz Universitaet Hannover |
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18 | !------------------------------------------------------------------------------! |
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19 | ! |
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20 | ! Current revisions: |
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21 | ! ----------------- |
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22 | ! |
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23 | ! |
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24 | ! Former revisions: |
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25 | ! ----------------- |
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26 | ! $Id: poisfft_mod.f90 2001 2016-08-20 18:41:22Z suehring $ |
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27 | ! |
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28 | ! 2000 2016-08-20 18:09:15Z knoop |
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29 | ! Forced header and separation lines into 80 columns |
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30 | ! |
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31 | ! 1850 2016-04-08 13:29:27Z maronga |
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32 | ! Module renamed |
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33 | ! |
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34 | ! |
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35 | ! 1804 2016-04-05 16:30:18Z maronga |
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36 | ! Removed code for parameter file check (__check) |
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37 | ! |
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38 | ! 1682 2015-10-07 23:56:08Z knoop |
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39 | ! Code annotations made doxygen readable |
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40 | ! |
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41 | ! 1482 2014-10-18 12:34:45Z raasch |
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42 | ! use 2d-decomposition, if accelerator boards are used |
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43 | ! |
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44 | ! 1406 2014-05-16 13:47:01Z raasch |
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45 | ! bugfix for pgi 14.4: declare create moved after array declaration |
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46 | ! |
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47 | ! 1320 2014-03-20 08:40:49Z raasch |
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48 | ! ONLY-attribute added to USE-statements, |
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49 | ! kind-parameters added to all INTEGER and REAL declaration statements, |
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50 | ! kinds are defined in new module kinds, |
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51 | ! old module precision_kind is removed, |
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52 | ! revision history before 2012 removed, |
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53 | ! comment fields (!:) to be used for variable explanations added to |
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54 | ! all variable declaration statements |
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55 | ! |
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56 | ! 1318 2014-03-17 13:35:16Z raasch |
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57 | ! module interfaces removed |
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58 | ! |
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59 | ! 1306 2014-03-13 14:30:59Z raasch |
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60 | ! openmp sections removed from the overlap branch, |
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61 | ! second argument removed from parameter list |
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62 | ! |
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63 | ! 1216 2013-08-26 09:31:42Z raasch |
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64 | ! resorting of arrays moved to separate routines resort_for_..., |
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65 | ! one argument, used as temporary work array, removed from all transpose |
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66 | ! routines |
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67 | ! overlapping fft / transposition implemented |
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68 | ! |
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69 | ! 1212 2013-08-15 08:46:27Z raasch |
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70 | ! tridia routines moved to seperate module tridia_solver |
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71 | ! |
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72 | ! 1208 2013-08-13 06:41:49Z raasch |
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73 | ! acc-update clauses added for "ar" so that ffts other than cufft can also be |
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74 | ! used (although they are not ported and will give a poor performance) |
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75 | ! |
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76 | ! 1111 2013-03-08 23:54:10Z raasch |
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77 | ! further openACC porting of non-parallel (MPI) branch: |
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78 | ! tridiagonal routines split into extermal subroutines (instead using CONTAINS), |
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79 | ! no distinction between parallel/non-parallel in poisfft and tridia any more, |
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80 | ! tridia routines moved to end of file because of probable bug in PGI compiler 12.5 |
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81 | ! (otherwise "invalid device function" is indicated during runtime), |
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82 | ! optimization of tridia routines: constant elements and coefficients of tri are |
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83 | ! stored in seperate arrays ddzuw and tric, last dimension of tri reduced from 5 |
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84 | ! to 2, |
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85 | ! poisfft_init is now called internally from poisfft, maketri is called from |
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86 | ! poisfft_init, |
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87 | ! ibc_p_b = 2 removed |
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88 | ! |
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89 | ! 1106 2013-03-04 05:31:38Z raasch |
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90 | ! routines fftx, ffty, fftxp, fftyp removed, calls replaced by fft_x, fft_y, |
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91 | ! in the 1D-decomposition routines fft_x, ffty are replaced by fft_x_1d, |
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92 | ! fft_y_1d |
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93 | ! |
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94 | ! 1103 2013-02-20 02:15:53Z raasch |
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95 | ! tri, ar, and ar1 arguments in tridia-routines (2d) are removed because they |
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96 | ! sometimes cause segmentation faults with intel 12.1 compiler |
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97 | ! |
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98 | ! 1092 2013-02-02 11:24:22Z raasch |
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99 | ! unused variables removed |
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100 | ! |
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101 | ! 1036 2012-10-22 13:43:42Z raasch |
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102 | ! code put under GPL (PALM 3.9) |
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103 | ! |
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104 | ! 2012-09-21 07:03:55Z raasch |
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105 | ! FLOAT type conversion replaced by REAL |
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106 | ! |
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107 | ! 1003 2012-09-14 14:35:53Z raasch |
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108 | ! indices nxa, nya, etc. replaced by nx, ny, etc. |
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109 | ! |
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110 | ! 940 2012-07-09 14:31:00Z raasch |
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111 | ! special handling of tri-array as an argument in tridia_1dd routines switched |
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112 | ! off because it caused segmentation faults with intel 12.1 compiler |
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113 | ! |
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114 | ! 877 2012-04-03 11:21:44Z suehring |
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115 | ! Bugfix: Avoid divisions by zero in case of using a 'neumann' bc for the |
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116 | ! pressure at the top of the model domain. |
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117 | ! |
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118 | ! 809 2012-01-30 13:32:58Z maronga |
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119 | ! Bugfix: replaced .AND. and .NOT. with && and ! in the preprocessor directives |
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120 | ! |
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121 | ! 807 2012-01-25 11:53:51Z maronga |
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122 | ! New cpp directive "__check" implemented which is used by check_namelist_files |
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123 | ! (most of the code is unneeded by check_namelist_files). |
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124 | ! |
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125 | ! Revision 1.1 1997/07/24 11:24:14 raasch |
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126 | ! Initial revision |
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127 | ! |
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128 | ! |
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129 | ! Description: |
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130 | ! ------------ |
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131 | !> Solves the Poisson equation with a 2D spectral method |
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132 | !> d^2 p / dx^2 + d^2 p / dy^2 + d^2 p / dz^2 = s |
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133 | !> |
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134 | !> Input: |
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135 | !> real ar contains (nnz,nny,nnx) elements of the velocity divergence, |
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136 | !> starting from (1,nys,nxl) |
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137 | !> |
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138 | !> Output: |
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139 | !> real ar contains the solution for perturbation pressure p |
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140 | !------------------------------------------------------------------------------! |
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141 | MODULE poisfft_mod |
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142 | |
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143 | |
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144 | USE fft_xy, & |
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145 | ONLY: fft_init, fft_y, fft_y_1d, fft_y_m, fft_x, fft_x_1d, fft_x_m |
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146 | |
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147 | USE indices, & |
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148 | ONLY: nnx, nny, nx, nxl, nxr, ny, nys, nyn, nz |
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149 | |
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150 | USE transpose_indices, & |
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151 | ONLY: nxl_y, nxl_z, nxr_y, nxr_z, nys_x, nys_z, nyn_x, nyn_z, nzb_x, & |
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152 | nzb_y, nzt_x, nzt_y |
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153 | |
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154 | USE tridia_solver, & |
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155 | ONLY: tridia_1dd, tridia_init, tridia_substi, tridia_substi_overlap |
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156 | |
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157 | IMPLICIT NONE |
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158 | |
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159 | LOGICAL, SAVE :: poisfft_initialized = .FALSE. |
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160 | |
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161 | PRIVATE |
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162 | |
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163 | PUBLIC poisfft, poisfft_init |
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164 | |
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165 | INTERFACE poisfft |
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166 | MODULE PROCEDURE poisfft |
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167 | END INTERFACE poisfft |
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168 | |
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169 | INTERFACE poisfft_init |
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170 | MODULE PROCEDURE poisfft_init |
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171 | END INTERFACE poisfft_init |
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172 | |
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173 | |
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174 | CONTAINS |
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175 | |
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176 | !------------------------------------------------------------------------------! |
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177 | ! Description: |
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178 | ! ------------ |
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179 | !> @todo Missing subroutine description. |
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180 | !------------------------------------------------------------------------------! |
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181 | SUBROUTINE poisfft_init |
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182 | |
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183 | USE arrays_3d, & |
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184 | ONLY: ddzu_pres, ddzw |
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185 | |
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186 | USE kinds |
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187 | |
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188 | IMPLICIT NONE |
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189 | |
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190 | INTEGER(iwp) :: k !< |
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191 | |
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192 | |
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193 | CALL fft_init |
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194 | |
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195 | CALL tridia_init |
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196 | |
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197 | poisfft_initialized = .TRUE. |
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198 | |
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199 | END SUBROUTINE poisfft_init |
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200 | |
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201 | |
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202 | |
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203 | !------------------------------------------------------------------------------! |
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204 | ! Description: |
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205 | ! ------------ |
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206 | !> Two-dimensional Fourier Transformation in x- and y-direction. |
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207 | !------------------------------------------------------------------------------! |
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208 | SUBROUTINE poisfft( ar ) |
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209 | |
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210 | USE control_parameters, & |
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211 | ONLY: fft_method, transpose_compute_overlap |
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212 | |
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213 | USE cpulog, & |
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214 | ONLY: cpu_log, cpu_log_nowait, log_point_s |
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215 | |
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216 | USE kinds |
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217 | |
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218 | USE pegrid |
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219 | |
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220 | IMPLICIT NONE |
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221 | |
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222 | INTEGER(iwp) :: ii !< |
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223 | INTEGER(iwp) :: iind !< |
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224 | INTEGER(iwp) :: inew !< |
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225 | INTEGER(iwp) :: jj !< |
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226 | INTEGER(iwp) :: jind !< |
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227 | INTEGER(iwp) :: jnew !< |
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228 | INTEGER(iwp) :: ki !< |
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229 | INTEGER(iwp) :: kk !< |
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230 | INTEGER(iwp) :: knew !< |
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231 | INTEGER(iwp) :: n !< |
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232 | INTEGER(iwp) :: nblk !< |
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233 | INTEGER(iwp) :: nnx_y !< |
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234 | INTEGER(iwp) :: nny_z !< |
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235 | INTEGER(iwp) :: nnz_t !< |
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236 | INTEGER(iwp) :: nnz_x !< |
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237 | INTEGER(iwp) :: nxl_y_bound !< |
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238 | INTEGER(iwp) :: nxr_y_bound !< |
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239 | |
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240 | INTEGER(iwp), DIMENSION(4) :: isave !< |
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241 | |
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242 | REAL(wp), DIMENSION(1:nz,nys:nyn,nxl:nxr) :: ar !< |
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243 | REAL(wp), DIMENSION(nys:nyn,nxl:nxr,1:nz) :: ar_inv !< |
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244 | !$acc declare create( ar_inv ) |
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245 | |
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246 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: ar1 !< |
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247 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: f_in !< |
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248 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: f_inv !< |
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249 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: f_out_y !< |
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250 | REAL(wp), DIMENSION(:,:,:), ALLOCATABLE :: f_out_z !< |
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251 | |
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252 | |
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253 | CALL cpu_log( log_point_s(3), 'poisfft', 'start' ) |
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254 | |
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255 | IF ( .NOT. poisfft_initialized ) CALL poisfft_init |
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256 | |
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257 | ! |
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258 | !-- Two-dimensional Fourier Transformation in x- and y-direction. |
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259 | IF ( pdims(2) == 1 .AND. pdims(1) > 1 .AND. num_acc_per_node == 0 ) & |
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260 | THEN |
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261 | |
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262 | ! |
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263 | !-- 1d-domain-decomposition along x: |
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264 | !-- FFT along y and transposition y --> x |
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265 | CALL ffty_tr_yx( ar, ar ) |
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266 | |
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267 | ! |
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268 | !-- FFT along x, solving the tridiagonal system and backward FFT |
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269 | CALL fftx_tri_fftx( ar ) |
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270 | |
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271 | ! |
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272 | !-- Transposition x --> y and backward FFT along y |
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273 | CALL tr_xy_ffty( ar, ar ) |
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274 | |
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275 | ELSEIF ( pdims(1) == 1 .AND. pdims(2) > 1 .AND. num_acc_per_node == 0 ) & |
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276 | THEN |
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277 | |
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278 | ! |
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279 | !-- 1d-domain-decomposition along y: |
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280 | !-- FFT along x and transposition x --> y |
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281 | CALL fftx_tr_xy( ar, ar ) |
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282 | |
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283 | ! |
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284 | !-- FFT along y, solving the tridiagonal system and backward FFT |
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285 | CALL ffty_tri_ffty( ar ) |
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286 | |
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287 | ! |
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288 | !-- Transposition y --> x and backward FFT along x |
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289 | CALL tr_yx_fftx( ar, ar ) |
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290 | |
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291 | ELSEIF ( .NOT. transpose_compute_overlap ) THEN |
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292 | |
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293 | ! |
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294 | !-- 2d-domain-decomposition or no decomposition (1 PE run) |
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295 | !-- Transposition z --> x |
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296 | CALL cpu_log( log_point_s(5), 'transpo forward', 'start' ) |
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297 | CALL resort_for_zx( ar, ar_inv ) |
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298 | CALL transpose_zx( ar_inv, ar ) |
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299 | CALL cpu_log( log_point_s(5), 'transpo forward', 'pause' ) |
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300 | |
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301 | CALL cpu_log( log_point_s(4), 'fft_x', 'start' ) |
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302 | IF ( fft_method /= 'system-specific' ) THEN |
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303 | !$acc update host( ar ) |
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304 | ENDIF |
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305 | CALL fft_x( ar, 'forward' ) |
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306 | IF ( fft_method /= 'system-specific' ) THEN |
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307 | !$acc update device( ar ) |
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308 | ENDIF |
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309 | CALL cpu_log( log_point_s(4), 'fft_x', 'pause' ) |
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310 | |
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311 | ! |
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312 | !-- Transposition x --> y |
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313 | CALL cpu_log( log_point_s(5), 'transpo forward', 'continue' ) |
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314 | CALL resort_for_xy( ar, ar_inv ) |
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315 | CALL transpose_xy( ar_inv, ar ) |
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316 | CALL cpu_log( log_point_s(5), 'transpo forward', 'pause' ) |
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317 | |
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318 | CALL cpu_log( log_point_s(7), 'fft_y', 'start' ) |
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319 | IF ( fft_method /= 'system-specific' ) THEN |
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320 | !$acc update host( ar ) |
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321 | ENDIF |
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322 | CALL fft_y( ar, 'forward', ar_tr = ar, & |
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323 | nxl_y_bound = nxl_y, nxr_y_bound = nxr_y, & |
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324 | nxl_y_l = nxl_y, nxr_y_l = nxr_y ) |
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325 | IF ( fft_method /= 'system-specific' ) THEN |
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326 | !$acc update device( ar ) |
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327 | ENDIF |
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328 | CALL cpu_log( log_point_s(7), 'fft_y', 'pause' ) |
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329 | |
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330 | ! |
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331 | !-- Transposition y --> z |
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332 | CALL cpu_log( log_point_s(5), 'transpo forward', 'continue' ) |
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333 | CALL resort_for_yz( ar, ar_inv ) |
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334 | CALL transpose_yz( ar_inv, ar ) |
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335 | CALL cpu_log( log_point_s(5), 'transpo forward', 'stop' ) |
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336 | |
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337 | ! |
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338 | !-- Solve the tridiagonal equation system along z |
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339 | CALL cpu_log( log_point_s(6), 'tridia', 'start' ) |
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340 | CALL tridia_substi( ar ) |
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341 | CALL cpu_log( log_point_s(6), 'tridia', 'stop' ) |
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342 | |
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343 | ! |
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344 | !-- Inverse Fourier Transformation |
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345 | !-- Transposition z --> y |
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346 | CALL cpu_log( log_point_s(8), 'transpo invers', 'start' ) |
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347 | CALL transpose_zy( ar, ar_inv ) |
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348 | CALL resort_for_zy( ar_inv, ar ) |
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349 | CALL cpu_log( log_point_s(8), 'transpo invers', 'pause' ) |
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350 | |
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351 | CALL cpu_log( log_point_s(7), 'fft_y', 'continue' ) |
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352 | IF ( fft_method /= 'system-specific' ) THEN |
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353 | !$acc update host( ar ) |
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354 | ENDIF |
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355 | CALL fft_y( ar, 'backward', ar_tr = ar, & |
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356 | nxl_y_bound = nxl_y, nxr_y_bound = nxr_y, & |
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357 | nxl_y_l = nxl_y, nxr_y_l = nxr_y ) |
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358 | IF ( fft_method /= 'system-specific' ) THEN |
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359 | !$acc update device( ar ) |
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360 | ENDIF |
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361 | CALL cpu_log( log_point_s(7), 'fft_y', 'stop' ) |
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362 | |
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363 | ! |
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364 | !-- Transposition y --> x |
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365 | CALL cpu_log( log_point_s(8), 'transpo invers', 'continue' ) |
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366 | CALL transpose_yx( ar, ar_inv ) |
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367 | CALL resort_for_yx( ar_inv, ar ) |
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368 | CALL cpu_log( log_point_s(8), 'transpo invers', 'pause' ) |
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369 | |
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370 | CALL cpu_log( log_point_s(4), 'fft_x', 'continue' ) |
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371 | IF ( fft_method /= 'system-specific' ) THEN |
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372 | !$acc update host( ar ) |
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373 | ENDIF |
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374 | CALL fft_x( ar, 'backward' ) |
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375 | IF ( fft_method /= 'system-specific' ) THEN |
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376 | !$acc update device( ar ) |
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377 | ENDIF |
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378 | CALL cpu_log( log_point_s(4), 'fft_x', 'stop' ) |
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379 | |
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380 | ! |
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381 | !-- Transposition x --> z |
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382 | CALL cpu_log( log_point_s(8), 'transpo invers', 'continue' ) |
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383 | CALL transpose_xz( ar, ar_inv ) |
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384 | CALL resort_for_xz( ar_inv, ar ) |
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385 | CALL cpu_log( log_point_s(8), 'transpo invers', 'stop' ) |
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386 | |
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387 | ELSE |
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388 | |
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389 | ! |
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390 | !-- 2d-domain-decomposition or no decomposition (1 PE run) with |
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391 | !-- overlapping transposition / fft |
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392 | !-- cputime logging must not use barriers, which would prevent overlapping |
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393 | ALLOCATE( f_out_y(0:ny,nxl_y:nxr_y,nzb_y:nzt_y), & |
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394 | f_out_z(0:nx,nys_x:nyn_x,nzb_x:nzt_x) ) |
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395 | ! |
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396 | !-- Transposition z --> x + subsequent fft along x |
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397 | ALLOCATE( f_inv(nys:nyn,nxl:nxr,1:nz) ) |
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398 | CALL resort_for_zx( ar, f_inv ) |
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399 | ! |
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400 | !-- Save original indices and gridpoint counter |
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401 | isave(1) = nz |
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402 | isave(2) = nzb_x |
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403 | isave(3) = nzt_x |
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404 | isave(4) = sendrecvcount_zx |
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405 | ! |
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406 | !-- Set new indices for transformation |
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407 | nblk = nz / pdims(1) |
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408 | nz = pdims(1) |
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409 | nnz_x = 1 |
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410 | nzb_x = 1 + myidx * nnz_x |
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411 | nzt_x = ( myidx + 1 ) * nnz_x |
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412 | sendrecvcount_zx = nnx * nny * nnz_x |
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413 | |
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414 | ALLOCATE( ar1(0:nx,nys_x:nyn_x,nzb_x:nzt_x) ) |
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415 | ALLOCATE( f_in(nys:nyn,nxl:nxr,1:nz) ) |
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416 | |
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417 | DO kk = 1, nblk |
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418 | |
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419 | IF ( kk == 1 ) THEN |
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420 | CALL cpu_log( log_point_s(5), 'transpo forward', 'start', cpu_log_nowait ) |
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421 | ELSE |
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422 | CALL cpu_log( log_point_s(5), 'transpo forward', 'continue', cpu_log_nowait ) |
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423 | ENDIF |
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424 | |
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425 | DO knew = 1, nz |
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426 | ki = kk + nblk * ( knew - 1 ) |
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427 | f_in(:,:,knew) = f_inv(:,:,ki) |
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428 | ENDDO |
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429 | |
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430 | CALL transpose_zx( f_in, ar1(:,:,:)) |
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431 | CALL cpu_log( log_point_s(5), 'transpo forward', 'pause' ) |
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432 | |
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433 | IF ( kk == 1 ) THEN |
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434 | CALL cpu_log( log_point_s(4), 'fft_x', 'start', cpu_log_nowait ) |
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435 | ELSE |
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436 | CALL cpu_log( log_point_s(4), 'fft_x', 'continue', cpu_log_nowait ) |
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437 | ENDIF |
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438 | |
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439 | n = isave(2) + kk - 1 |
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440 | CALL fft_x( ar1(:,:,:), 'forward', ar_2d = f_out_z(:,:,n)) |
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441 | CALL cpu_log( log_point_s(4), 'fft_x', 'pause' ) |
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442 | |
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443 | ENDDO |
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444 | ! |
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445 | !-- Restore original indices/counters |
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446 | nz = isave(1) |
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447 | nzb_x = isave(2) |
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448 | nzt_x = isave(3) |
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449 | sendrecvcount_zx = isave(4) |
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450 | |
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451 | DEALLOCATE( ar1, f_in, f_inv ) |
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452 | |
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453 | ! |
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454 | !-- Transposition x --> y + subsequent fft along y |
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455 | ALLOCATE( f_inv(nys_x:nyn_x,nzb_x:nzt_x,0:nx) ) |
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456 | CALL resort_for_xy( f_out_z, f_inv ) |
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457 | ! |
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458 | !-- Save original indices and gridpoint counter |
---|
459 | isave(1) = nx |
---|
460 | isave(2) = nxl_y |
---|
461 | isave(3) = nxr_y |
---|
462 | isave(4) = sendrecvcount_xy |
---|
463 | ! |
---|
464 | !-- Set new indices for transformation |
---|
465 | nblk = ( ( nx+1 ) / pdims(2) ) - 1 |
---|
466 | nx = pdims(2) |
---|
467 | nnx_y = 1 |
---|
468 | nxl_y = myidy * nnx_y |
---|
469 | nxr_y = ( myidy + 1 ) * nnx_y - 1 |
---|
470 | sendrecvcount_xy = nnx_y * ( nyn_x-nys_x+1 ) * ( nzt_x-nzb_x+1 ) |
---|
471 | |
---|
472 | ALLOCATE( ar1(0:ny,nxl_y:nxr_y,nzb_y:nzt_y) ) |
---|
473 | ALLOCATE( f_in(nys_x:nyn_x,nzb_x:nzt_x,0:nx) ) |
---|
474 | |
---|
475 | DO ii = 0, nblk |
---|
476 | |
---|
477 | CALL cpu_log( log_point_s(5), 'transpo forward', 'continue', cpu_log_nowait ) |
---|
478 | |
---|
479 | DO inew = 0, nx-1 |
---|
480 | iind = ii + ( nblk + 1 ) * inew |
---|
481 | f_in(:,:,inew) = f_inv(:,:,iind) |
---|
482 | ENDDO |
---|
483 | |
---|
484 | CALL transpose_xy( f_in, ar1(:,:,:) ) |
---|
485 | |
---|
486 | CALL cpu_log( log_point_s(5), 'transpo forward', 'pause' ) |
---|
487 | |
---|
488 | IF ( ii == 1 ) THEN |
---|
489 | CALL cpu_log( log_point_s(7), 'fft_y', 'start', cpu_log_nowait ) |
---|
490 | ELSE |
---|
491 | CALL cpu_log( log_point_s(7), 'fft_y', 'continue', cpu_log_nowait ) |
---|
492 | ENDIF |
---|
493 | |
---|
494 | nxl_y_bound = isave(2) |
---|
495 | nxr_y_bound = isave(3) |
---|
496 | n = isave(2) + ii |
---|
497 | CALL fft_y( ar1(:,:,:), 'forward', ar_tr = f_out_y, & |
---|
498 | nxl_y_bound = nxl_y_bound, nxr_y_bound = nxr_y_bound, & |
---|
499 | nxl_y_l = n, nxr_y_l = n ) |
---|
500 | |
---|
501 | CALL cpu_log( log_point_s(7), 'fft_y', 'pause' ) |
---|
502 | |
---|
503 | ENDDO |
---|
504 | ! |
---|
505 | !-- Restore original indices/counters |
---|
506 | nx = isave(1) |
---|
507 | nxl_y = isave(2) |
---|
508 | nxr_y = isave(3) |
---|
509 | sendrecvcount_xy = isave(4) |
---|
510 | |
---|
511 | DEALLOCATE( ar1, f_in, f_inv ) |
---|
512 | |
---|
513 | ! |
---|
514 | !-- Transposition y --> z + subsequent tridia + resort for z --> y |
---|
515 | ALLOCATE( f_inv(nxl_y:nxr_y,nzb_y:nzt_y,0:ny) ) |
---|
516 | CALL resort_for_yz( f_out_y, f_inv ) |
---|
517 | ! |
---|
518 | !-- Save original indices and gridpoint counter |
---|
519 | isave(1) = ny |
---|
520 | isave(2) = nys_z |
---|
521 | isave(3) = nyn_z |
---|
522 | isave(4) = sendrecvcount_yz |
---|
523 | ! |
---|
524 | !-- Set new indices for transformation |
---|
525 | nblk = ( ( ny+1 ) / pdims(1) ) - 1 |
---|
526 | ny = pdims(1) |
---|
527 | nny_z = 1 |
---|
528 | nys_z = myidx * nny_z |
---|
529 | nyn_z = ( myidx + 1 ) * nny_z - 1 |
---|
530 | sendrecvcount_yz = ( nxr_y-nxl_y+1 ) * nny_z * ( nzt_y-nzb_y+1 ) |
---|
531 | |
---|
532 | ALLOCATE( ar1(nxl_z:nxr_z,nys_z:nyn_z,1:nz) ) |
---|
533 | ALLOCATE( f_in(nxl_y:nxr_y,nzb_y:nzt_y,0:ny) ) |
---|
534 | |
---|
535 | DO jj = 0, nblk |
---|
536 | ! |
---|
537 | !-- Forward Fourier Transformation |
---|
538 | !-- Transposition y --> z |
---|
539 | CALL cpu_log( log_point_s(5), 'transpo forward', 'continue', cpu_log_nowait ) |
---|
540 | |
---|
541 | DO jnew = 0, ny-1 |
---|
542 | jind = jj + ( nblk + 1 ) * jnew |
---|
543 | f_in(:,:,jnew) = f_inv(:,:,jind) |
---|
544 | ENDDO |
---|
545 | |
---|
546 | CALL transpose_yz( f_in, ar1(:,:,:) ) |
---|
547 | |
---|
548 | IF ( jj == nblk ) THEN |
---|
549 | CALL cpu_log( log_point_s(5), 'transpo forward', 'stop' ) |
---|
550 | ELSE |
---|
551 | CALL cpu_log( log_point_s(5), 'transpo forward', 'pause' ) |
---|
552 | ENDIF |
---|
553 | |
---|
554 | ! |
---|
555 | !-- Solve the tridiagonal equation system along z |
---|
556 | CALL cpu_log( log_point_s(6), 'tridia', 'start', cpu_log_nowait ) |
---|
557 | |
---|
558 | n = isave(2) + jj |
---|
559 | CALL tridia_substi_overlap( ar1(:,:,:), n ) |
---|
560 | |
---|
561 | CALL cpu_log( log_point_s(6), 'tridia', 'stop' ) |
---|
562 | |
---|
563 | ! |
---|
564 | !-- Inverse Fourier Transformation |
---|
565 | !-- Transposition z --> y |
---|
566 | !-- Only one thread should call MPI routines, therefore forward and |
---|
567 | !-- backward tranpose are in the same section |
---|
568 | IF ( jj == 0 ) THEN |
---|
569 | CALL cpu_log( log_point_s(8), 'transpo invers', 'start', cpu_log_nowait ) |
---|
570 | ELSE |
---|
571 | CALL cpu_log( log_point_s(8), 'transpo invers', 'continue', cpu_log_nowait ) |
---|
572 | ENDIF |
---|
573 | |
---|
574 | CALL transpose_zy( ar1(:,:,:), f_in ) |
---|
575 | |
---|
576 | DO jnew = 0, ny-1 |
---|
577 | jind = jj + ( nblk + 1 ) * jnew |
---|
578 | f_inv(:,:,jind) = f_in(:,:,jnew) |
---|
579 | ENDDO |
---|
580 | |
---|
581 | CALL cpu_log( log_point_s(8), 'transpo invers', 'pause' ) |
---|
582 | |
---|
583 | ENDDO |
---|
584 | ! |
---|
585 | !-- Restore original indices/counters |
---|
586 | ny = isave(1) |
---|
587 | nys_z = isave(2) |
---|
588 | nyn_z = isave(3) |
---|
589 | sendrecvcount_yz = isave(4) |
---|
590 | |
---|
591 | CALL resort_for_zy( f_inv, f_out_y ) |
---|
592 | |
---|
593 | DEALLOCATE( ar1, f_in, f_inv ) |
---|
594 | |
---|
595 | ! |
---|
596 | !-- fft along y backward + subsequent transposition y --> x |
---|
597 | ALLOCATE( f_inv(nys_x:nyn_x,nzb_x:nzt_x,0:nx) ) |
---|
598 | ! |
---|
599 | !-- Save original indices and gridpoint counter |
---|
600 | isave(1) = nx |
---|
601 | isave(2) = nxl_y |
---|
602 | isave(3) = nxr_y |
---|
603 | isave(4) = sendrecvcount_xy |
---|
604 | ! |
---|
605 | !-- Set new indices for transformation |
---|
606 | nblk = (( nx+1 ) / pdims(2) ) - 1 |
---|
607 | nx = pdims(2) |
---|
608 | nnx_y = 1 |
---|
609 | nxl_y = myidy * nnx_y |
---|
610 | nxr_y = ( myidy + 1 ) * nnx_y - 1 |
---|
611 | sendrecvcount_xy = nnx_y * ( nyn_x-nys_x+1 ) * ( nzt_x-nzb_x+1 ) |
---|
612 | |
---|
613 | ALLOCATE( ar1(0:ny,nxl_y:nxr_y,nzb_y:nzt_y) ) |
---|
614 | ALLOCATE( f_in(nys_x:nyn_x,nzb_x:nzt_x,0:nx) ) |
---|
615 | |
---|
616 | DO ii = 0, nblk |
---|
617 | |
---|
618 | CALL cpu_log( log_point_s(7), 'fft_y', 'continue', cpu_log_nowait ) |
---|
619 | |
---|
620 | n = isave(2) + ii |
---|
621 | nxl_y_bound = isave(2) |
---|
622 | nxr_y_bound = isave(3) |
---|
623 | |
---|
624 | CALL fft_y( ar1(:,:,:), 'backward', ar_tr = f_out_y, & |
---|
625 | nxl_y_bound = nxl_y_bound, nxr_y_bound = nxr_y_bound, & |
---|
626 | nxl_y_l = n, nxr_y_l = n ) |
---|
627 | |
---|
628 | IF ( ii == nblk ) THEN |
---|
629 | CALL cpu_log( log_point_s(7), 'fft_y', 'stop' ) |
---|
630 | ELSE |
---|
631 | CALL cpu_log( log_point_s(7), 'fft_y', 'pause' ) |
---|
632 | ENDIF |
---|
633 | |
---|
634 | CALL cpu_log( log_point_s(8), 'transpo invers', 'continue', cpu_log_nowait ) |
---|
635 | |
---|
636 | CALL transpose_yx( ar1(:,:,:), f_in ) |
---|
637 | |
---|
638 | DO inew = 0, nx-1 |
---|
639 | iind = ii + (nblk+1) * inew |
---|
640 | f_inv(:,:,iind) = f_in(:,:,inew) |
---|
641 | ENDDO |
---|
642 | |
---|
643 | CALL cpu_log( log_point_s(8), 'transpo invers', 'pause' ) |
---|
644 | |
---|
645 | ENDDO |
---|
646 | ! |
---|
647 | !-- Restore original indices/counters |
---|
648 | nx = isave(1) |
---|
649 | nxl_y = isave(2) |
---|
650 | nxr_y = isave(3) |
---|
651 | sendrecvcount_xy = isave(4) |
---|
652 | |
---|
653 | CALL resort_for_yx( f_inv, f_out_z ) |
---|
654 | |
---|
655 | DEALLOCATE( ar1, f_in, f_inv ) |
---|
656 | |
---|
657 | ! |
---|
658 | !-- fft along x backward + subsequent final transposition x --> z |
---|
659 | ALLOCATE( f_inv(nys:nyn,nxl:nxr,1:nz) ) |
---|
660 | ! |
---|
661 | !-- Save original indices and gridpoint counter |
---|
662 | isave(1) = nz |
---|
663 | isave(2) = nzb_x |
---|
664 | isave(3) = nzt_x |
---|
665 | isave(4) = sendrecvcount_zx |
---|
666 | ! |
---|
667 | !-- Set new indices for transformation |
---|
668 | nblk = nz / pdims(1) |
---|
669 | nz = pdims(1) |
---|
670 | nnz_x = 1 |
---|
671 | nzb_x = 1 + myidx * nnz_x |
---|
672 | nzt_x = ( myidx + 1 ) * nnz_x |
---|
673 | sendrecvcount_zx = nnx * nny * nnz_x |
---|
674 | |
---|
675 | ALLOCATE( ar1(0:nx,nys_x:nyn_x,nzb_x:nzt_x) ) |
---|
676 | ALLOCATE( f_in(nys:nyn,nxl:nxr,1:nz) ) |
---|
677 | |
---|
678 | DO kk = 1, nblk |
---|
679 | |
---|
680 | CALL cpu_log( log_point_s(4), 'fft_x', 'continue', cpu_log_nowait ) |
---|
681 | |
---|
682 | n = isave(2) + kk - 1 |
---|
683 | CALL fft_x( ar1(:,:,:), 'backward', f_out_z(:,:,n)) |
---|
684 | |
---|
685 | IF ( kk == nblk ) THEN |
---|
686 | CALL cpu_log( log_point_s(4), 'fft_x', 'stop' ) |
---|
687 | ELSE |
---|
688 | CALL cpu_log( log_point_s(4), 'fft_x', 'pause' ) |
---|
689 | ENDIF |
---|
690 | |
---|
691 | CALL cpu_log( log_point_s(8), 'transpo invers', 'continue', cpu_log_nowait ) |
---|
692 | |
---|
693 | CALL transpose_xz( ar1(:,:,:), f_in ) |
---|
694 | |
---|
695 | DO knew = 1, nz |
---|
696 | ki = kk + nblk * (knew-1) |
---|
697 | f_inv(:,:,ki) = f_in(:,:,knew) |
---|
698 | ENDDO |
---|
699 | |
---|
700 | IF ( kk == nblk ) THEN |
---|
701 | CALL cpu_log( log_point_s(8), 'transpo invers', 'stop' ) |
---|
702 | ELSE |
---|
703 | CALL cpu_log( log_point_s(8), 'transpo invers', 'pause' ) |
---|
704 | ENDIF |
---|
705 | |
---|
706 | ENDDO |
---|
707 | ! |
---|
708 | !-- Restore original indices/counters |
---|
709 | nz = isave(1) |
---|
710 | nzb_x = isave(2) |
---|
711 | nzt_x = isave(3) |
---|
712 | sendrecvcount_zx = isave(4) |
---|
713 | |
---|
714 | CALL resort_for_xz( f_inv, ar ) |
---|
715 | |
---|
716 | DEALLOCATE( ar1, f_in, f_inv ) |
---|
717 | |
---|
718 | ENDIF |
---|
719 | |
---|
720 | CALL cpu_log( log_point_s(3), 'poisfft', 'stop' ) |
---|
721 | |
---|
722 | END SUBROUTINE poisfft |
---|
723 | |
---|
724 | |
---|
725 | !------------------------------------------------------------------------------! |
---|
726 | ! Description: |
---|
727 | ! ------------ |
---|
728 | !> Fourier-transformation along y with subsequent transposition y --> x for |
---|
729 | !> a 1d-decomposition along x. |
---|
730 | !> |
---|
731 | !> @attention The performance of this routine is much faster on the NEC-SX6, |
---|
732 | !> if the first index of work_ffty_vec is odd. Otherwise |
---|
733 | !> memory bank conflicts may occur (especially if the index is a |
---|
734 | !> multiple of 128). That's why work_ffty_vec is dimensioned as |
---|
735 | !> 0:ny+1. |
---|
736 | !> Of course, this will not work if users are using an odd number |
---|
737 | !> of gridpoints along y. |
---|
738 | !------------------------------------------------------------------------------! |
---|
739 | SUBROUTINE ffty_tr_yx( f_in, f_out ) |
---|
740 | |
---|
741 | |
---|
742 | USE control_parameters, & |
---|
743 | ONLY: host |
---|
744 | |
---|
745 | USE cpulog, & |
---|
746 | ONLY: cpu_log, log_point_s |
---|
747 | |
---|
748 | USE kinds |
---|
749 | |
---|
750 | USE pegrid |
---|
751 | |
---|
752 | IMPLICIT NONE |
---|
753 | |
---|
754 | INTEGER(iwp) :: i !< |
---|
755 | INTEGER(iwp) :: iend !< |
---|
756 | INTEGER(iwp) :: iouter !< |
---|
757 | INTEGER(iwp) :: ir !< |
---|
758 | INTEGER(iwp) :: j !< |
---|
759 | INTEGER(iwp) :: k !< |
---|
760 | |
---|
761 | INTEGER(iwp), PARAMETER :: stridex = 4 !< |
---|
762 | |
---|
763 | REAL(wp), DIMENSION(0:ny,stridex) :: work_ffty !< |
---|
764 | #if defined( __nec ) |
---|
765 | REAL(wp), DIMENSION(0:ny+1,1:nz,nxl:nxr) :: work_ffty_vec !< |
---|
766 | #endif |
---|
767 | REAL(wp), DIMENSION(1:nz,0:ny,nxl:nxr) :: f_in !< |
---|
768 | REAL(wp), DIMENSION(nnx,1:nz,nys_x:nyn_x,pdims(1)) :: f_out !< |
---|
769 | REAL(wp), DIMENSION(nxl:nxr,1:nz,0:ny) :: work !< |
---|
770 | |
---|
771 | ! |
---|
772 | !-- Carry out the FFT along y, where all data are present due to the |
---|
773 | !-- 1d-decomposition along x. Resort the data in a way that x becomes |
---|
774 | !-- the first index. |
---|
775 | CALL cpu_log( log_point_s(7), 'fft_y_1d', 'start' ) |
---|
776 | |
---|
777 | IF ( host(1:3) == 'nec' ) THEN |
---|
778 | #if defined( __nec ) |
---|
779 | ! |
---|
780 | !-- Code optimized for vector processors |
---|
781 | !$OMP PARALLEL PRIVATE ( i, j, k ) |
---|
782 | !$OMP DO |
---|
783 | DO i = nxl, nxr |
---|
784 | |
---|
785 | DO j = 0, ny |
---|
786 | DO k = 1, nz |
---|
787 | work_ffty_vec(j,k,i) = f_in(k,j,i) |
---|
788 | ENDDO |
---|
789 | ENDDO |
---|
790 | |
---|
791 | CALL fft_y_m( work_ffty_vec(:,:,i), ny+1, 'forward' ) |
---|
792 | |
---|
793 | ENDDO |
---|
794 | |
---|
795 | !$OMP DO |
---|
796 | DO k = 1, nz |
---|
797 | DO j = 0, ny |
---|
798 | DO i = nxl, nxr |
---|
799 | work(i,k,j) = work_ffty_vec(j,k,i) |
---|
800 | ENDDO |
---|
801 | ENDDO |
---|
802 | ENDDO |
---|
803 | !$OMP END PARALLEL |
---|
804 | #endif |
---|
805 | |
---|
806 | ELSE |
---|
807 | |
---|
808 | ! |
---|
809 | !-- Cache optimized code. |
---|
810 | !-- The i-(x-)direction is split into a strided outer loop and an inner |
---|
811 | !-- loop for better cache performance |
---|
812 | !$OMP PARALLEL PRIVATE (i,iend,iouter,ir,j,k,work_ffty) |
---|
813 | !$OMP DO |
---|
814 | DO iouter = nxl, nxr, stridex |
---|
815 | |
---|
816 | iend = MIN( iouter+stridex-1, nxr ) ! Upper bound for inner i loop |
---|
817 | |
---|
818 | DO k = 1, nz |
---|
819 | |
---|
820 | DO i = iouter, iend |
---|
821 | |
---|
822 | ir = i-iouter+1 ! counter within a stride |
---|
823 | DO j = 0, ny |
---|
824 | work_ffty(j,ir) = f_in(k,j,i) |
---|
825 | ENDDO |
---|
826 | ! |
---|
827 | !-- FFT along y |
---|
828 | CALL fft_y_1d( work_ffty(:,ir), 'forward' ) |
---|
829 | |
---|
830 | ENDDO |
---|
831 | |
---|
832 | ! |
---|
833 | !-- Resort |
---|
834 | DO j = 0, ny |
---|
835 | DO i = iouter, iend |
---|
836 | work(i,k,j) = work_ffty(j,i-iouter+1) |
---|
837 | ENDDO |
---|
838 | ENDDO |
---|
839 | |
---|
840 | ENDDO |
---|
841 | |
---|
842 | ENDDO |
---|
843 | !$OMP END PARALLEL |
---|
844 | |
---|
845 | ENDIF |
---|
846 | CALL cpu_log( log_point_s(7), 'fft_y_1d', 'pause' ) |
---|
847 | |
---|
848 | ! |
---|
849 | !-- Transpose array |
---|
850 | #if defined( __parallel ) |
---|
851 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'start' ) |
---|
852 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
---|
853 | CALL MPI_ALLTOALL( work(nxl,1,0), sendrecvcount_xy, MPI_REAL, & |
---|
854 | f_out(1,1,nys_x,1), sendrecvcount_xy, MPI_REAL, & |
---|
855 | comm1dx, ierr ) |
---|
856 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'stop' ) |
---|
857 | #endif |
---|
858 | |
---|
859 | END SUBROUTINE ffty_tr_yx |
---|
860 | |
---|
861 | |
---|
862 | !------------------------------------------------------------------------------! |
---|
863 | ! Description: |
---|
864 | ! ------------ |
---|
865 | !> Transposition x --> y with a subsequent backward Fourier transformation for |
---|
866 | !> a 1d-decomposition along x |
---|
867 | !------------------------------------------------------------------------------! |
---|
868 | SUBROUTINE tr_xy_ffty( f_in, f_out ) |
---|
869 | |
---|
870 | |
---|
871 | USE control_parameters, & |
---|
872 | ONLY: host |
---|
873 | |
---|
874 | USE cpulog, & |
---|
875 | ONLY: cpu_log, log_point_s |
---|
876 | |
---|
877 | USE kinds |
---|
878 | |
---|
879 | USE pegrid |
---|
880 | |
---|
881 | IMPLICIT NONE |
---|
882 | |
---|
883 | INTEGER(iwp) :: i !< |
---|
884 | INTEGER(iwp) :: iend !< |
---|
885 | INTEGER(iwp) :: iouter !< |
---|
886 | INTEGER(iwp) :: ir !< |
---|
887 | INTEGER(iwp) :: j !< |
---|
888 | INTEGER(iwp) :: k !< |
---|
889 | |
---|
890 | INTEGER(iwp), PARAMETER :: stridex = 4 !< |
---|
891 | |
---|
892 | REAL(wp), DIMENSION(0:ny,stridex) :: work_ffty !< |
---|
893 | #if defined( __nec ) |
---|
894 | REAL(wp), DIMENSION(0:ny+1,1:nz,nxl:nxr) :: work_ffty_vec !< |
---|
895 | #endif |
---|
896 | REAL(wp), DIMENSION(nnx,1:nz,nys_x:nyn_x,pdims(1)) :: f_in !< |
---|
897 | REAL(wp), DIMENSION(1:nz,0:ny,nxl:nxr) :: f_out !< |
---|
898 | REAL(wp), DIMENSION(nxl:nxr,1:nz,0:ny) :: work !< |
---|
899 | |
---|
900 | ! |
---|
901 | !-- Transpose array |
---|
902 | #if defined( __parallel ) |
---|
903 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'start' ) |
---|
904 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
---|
905 | CALL MPI_ALLTOALL( f_in(1,1,nys_x,1), sendrecvcount_xy, MPI_REAL, & |
---|
906 | work(nxl,1,0), sendrecvcount_xy, MPI_REAL, & |
---|
907 | comm1dx, ierr ) |
---|
908 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'stop' ) |
---|
909 | #endif |
---|
910 | |
---|
911 | ! |
---|
912 | !-- Resort the data in a way that y becomes the first index and carry out the |
---|
913 | !-- backward fft along y. |
---|
914 | CALL cpu_log( log_point_s(7), 'fft_y_1d', 'continue' ) |
---|
915 | |
---|
916 | IF ( host(1:3) == 'nec' ) THEN |
---|
917 | #if defined( __nec ) |
---|
918 | ! |
---|
919 | !-- Code optimized for vector processors |
---|
920 | !$OMP PARALLEL PRIVATE ( i, j, k ) |
---|
921 | !$OMP DO |
---|
922 | DO k = 1, nz |
---|
923 | DO j = 0, ny |
---|
924 | DO i = nxl, nxr |
---|
925 | work_ffty_vec(j,k,i) = work(i,k,j) |
---|
926 | ENDDO |
---|
927 | ENDDO |
---|
928 | ENDDO |
---|
929 | |
---|
930 | !$OMP DO |
---|
931 | DO i = nxl, nxr |
---|
932 | |
---|
933 | CALL fft_y_m( work_ffty_vec(:,:,i), ny+1, 'backward' ) |
---|
934 | |
---|
935 | DO j = 0, ny |
---|
936 | DO k = 1, nz |
---|
937 | f_out(k,j,i) = work_ffty_vec(j,k,i) |
---|
938 | ENDDO |
---|
939 | ENDDO |
---|
940 | |
---|
941 | ENDDO |
---|
942 | !$OMP END PARALLEL |
---|
943 | #endif |
---|
944 | |
---|
945 | ELSE |
---|
946 | |
---|
947 | ! |
---|
948 | !-- Cache optimized code. |
---|
949 | !-- The i-(x-)direction is split into a strided outer loop and an inner |
---|
950 | !-- loop for better cache performance |
---|
951 | !$OMP PARALLEL PRIVATE ( i, iend, iouter, ir, j, k, work_ffty ) |
---|
952 | !$OMP DO |
---|
953 | DO iouter = nxl, nxr, stridex |
---|
954 | |
---|
955 | iend = MIN( iouter+stridex-1, nxr ) ! Upper bound for inner i loop |
---|
956 | |
---|
957 | DO k = 1, nz |
---|
958 | ! |
---|
959 | !-- Resort |
---|
960 | DO j = 0, ny |
---|
961 | DO i = iouter, iend |
---|
962 | work_ffty(j,i-iouter+1) = work(i,k,j) |
---|
963 | ENDDO |
---|
964 | ENDDO |
---|
965 | |
---|
966 | DO i = iouter, iend |
---|
967 | |
---|
968 | ! |
---|
969 | !-- FFT along y |
---|
970 | ir = i-iouter+1 ! counter within a stride |
---|
971 | CALL fft_y_1d( work_ffty(:,ir), 'backward' ) |
---|
972 | |
---|
973 | DO j = 0, ny |
---|
974 | f_out(k,j,i) = work_ffty(j,ir) |
---|
975 | ENDDO |
---|
976 | ENDDO |
---|
977 | |
---|
978 | ENDDO |
---|
979 | |
---|
980 | ENDDO |
---|
981 | !$OMP END PARALLEL |
---|
982 | |
---|
983 | ENDIF |
---|
984 | |
---|
985 | CALL cpu_log( log_point_s(7), 'fft_y_1d', 'stop' ) |
---|
986 | |
---|
987 | END SUBROUTINE tr_xy_ffty |
---|
988 | |
---|
989 | |
---|
990 | !------------------------------------------------------------------------------! |
---|
991 | ! Description: |
---|
992 | ! ------------ |
---|
993 | !> FFT along x, solution of the tridiagonal system and backward FFT for |
---|
994 | !> a 1d-decomposition along x |
---|
995 | !> |
---|
996 | !> @warning this subroutine may still not work for hybrid parallelization |
---|
997 | !> with OpenMP (for possible necessary changes see the original |
---|
998 | !> routine poisfft_hybrid, developed by Klaus Ketelsen, May 2002) |
---|
999 | !------------------------------------------------------------------------------! |
---|
1000 | SUBROUTINE fftx_tri_fftx( ar ) |
---|
1001 | |
---|
1002 | |
---|
1003 | USE control_parameters, & |
---|
1004 | ONLY: host |
---|
1005 | |
---|
1006 | USE cpulog, & |
---|
1007 | ONLY: cpu_log, log_point_s |
---|
1008 | |
---|
1009 | USE grid_variables, & |
---|
1010 | ONLY: ddx2, ddy2 |
---|
1011 | |
---|
1012 | USE kinds |
---|
1013 | |
---|
1014 | USE pegrid |
---|
1015 | |
---|
1016 | IMPLICIT NONE |
---|
1017 | |
---|
1018 | INTEGER(iwp) :: i !< |
---|
1019 | INTEGER(iwp) :: j !< |
---|
1020 | INTEGER(iwp) :: k !< |
---|
1021 | INTEGER(iwp) :: m !< |
---|
1022 | INTEGER(iwp) :: n !< |
---|
1023 | INTEGER(iwp) :: omp_get_thread_num !< |
---|
1024 | INTEGER(iwp) :: tn !< |
---|
1025 | |
---|
1026 | REAL(wp), DIMENSION(0:nx) :: work_fftx !< |
---|
1027 | REAL(wp), DIMENSION(0:nx,1:nz) :: work_trix !< |
---|
1028 | REAL(wp), DIMENSION(nnx,1:nz,nys_x:nyn_x,pdims(1)) :: ar !< |
---|
1029 | REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: tri !< |
---|
1030 | |
---|
1031 | |
---|
1032 | CALL cpu_log( log_point_s(33), 'fft_x_1d + tridia', 'start' ) |
---|
1033 | |
---|
1034 | ALLOCATE( tri(5,0:nx,0:nz-1,0:threads_per_task-1) ) |
---|
1035 | |
---|
1036 | tn = 0 ! Default thread number in case of one thread |
---|
1037 | !$OMP PARALLEL DO PRIVATE ( i, j, k, m, n, tn, work_fftx, work_trix ) |
---|
1038 | DO j = nys_x, nyn_x |
---|
1039 | |
---|
1040 | !$ tn = omp_get_thread_num() |
---|
1041 | |
---|
1042 | IF ( host(1:3) == 'nec' ) THEN |
---|
1043 | ! |
---|
1044 | !-- Code optimized for vector processors |
---|
1045 | DO k = 1, nz |
---|
1046 | |
---|
1047 | m = 0 |
---|
1048 | DO n = 1, pdims(1) |
---|
1049 | DO i = 1, nnx |
---|
1050 | work_trix(m,k) = ar(i,k,j,n) |
---|
1051 | m = m + 1 |
---|
1052 | ENDDO |
---|
1053 | ENDDO |
---|
1054 | |
---|
1055 | ENDDO |
---|
1056 | |
---|
1057 | CALL fft_x_m( work_trix, 'forward' ) |
---|
1058 | |
---|
1059 | ELSE |
---|
1060 | ! |
---|
1061 | !-- Cache optimized code |
---|
1062 | DO k = 1, nz |
---|
1063 | |
---|
1064 | m = 0 |
---|
1065 | DO n = 1, pdims(1) |
---|
1066 | DO i = 1, nnx |
---|
1067 | work_fftx(m) = ar(i,k,j,n) |
---|
1068 | m = m + 1 |
---|
1069 | ENDDO |
---|
1070 | ENDDO |
---|
1071 | |
---|
1072 | CALL fft_x_1d( work_fftx, 'forward' ) |
---|
1073 | |
---|
1074 | DO i = 0, nx |
---|
1075 | work_trix(i,k) = work_fftx(i) |
---|
1076 | ENDDO |
---|
1077 | |
---|
1078 | ENDDO |
---|
1079 | |
---|
1080 | ENDIF |
---|
1081 | |
---|
1082 | ! |
---|
1083 | !-- Solve the linear equation system |
---|
1084 | CALL tridia_1dd( ddx2, ddy2, nx, ny, j, work_trix, tri(:,:,:,tn) ) |
---|
1085 | |
---|
1086 | IF ( host(1:3) == 'nec' ) THEN |
---|
1087 | ! |
---|
1088 | !-- Code optimized for vector processors |
---|
1089 | CALL fft_x_m( work_trix, 'backward' ) |
---|
1090 | |
---|
1091 | DO k = 1, nz |
---|
1092 | |
---|
1093 | m = 0 |
---|
1094 | DO n = 1, pdims(1) |
---|
1095 | DO i = 1, nnx |
---|
1096 | ar(i,k,j,n) = work_trix(m,k) |
---|
1097 | m = m + 1 |
---|
1098 | ENDDO |
---|
1099 | ENDDO |
---|
1100 | |
---|
1101 | ENDDO |
---|
1102 | |
---|
1103 | ELSE |
---|
1104 | ! |
---|
1105 | !-- Cache optimized code |
---|
1106 | DO k = 1, nz |
---|
1107 | |
---|
1108 | DO i = 0, nx |
---|
1109 | work_fftx(i) = work_trix(i,k) |
---|
1110 | ENDDO |
---|
1111 | |
---|
1112 | CALL fft_x_1d( work_fftx, 'backward' ) |
---|
1113 | |
---|
1114 | m = 0 |
---|
1115 | DO n = 1, pdims(1) |
---|
1116 | DO i = 1, nnx |
---|
1117 | ar(i,k,j,n) = work_fftx(m) |
---|
1118 | m = m + 1 |
---|
1119 | ENDDO |
---|
1120 | ENDDO |
---|
1121 | |
---|
1122 | ENDDO |
---|
1123 | |
---|
1124 | ENDIF |
---|
1125 | |
---|
1126 | ENDDO |
---|
1127 | |
---|
1128 | DEALLOCATE( tri ) |
---|
1129 | |
---|
1130 | CALL cpu_log( log_point_s(33), 'fft_x_1d + tridia', 'stop' ) |
---|
1131 | |
---|
1132 | END SUBROUTINE fftx_tri_fftx |
---|
1133 | |
---|
1134 | |
---|
1135 | !------------------------------------------------------------------------------! |
---|
1136 | ! Description: |
---|
1137 | ! ------------ |
---|
1138 | !> Fourier-transformation along x with subsequent transposition x --> y for |
---|
1139 | !> a 1d-decomposition along y. |
---|
1140 | !> |
---|
1141 | !> @attention NEC-branch of this routine may significantly profit from |
---|
1142 | !> further optimizations. So far, performance is much worse than |
---|
1143 | !> for routine ffty_tr_yx (more than three times slower). |
---|
1144 | !------------------------------------------------------------------------------! |
---|
1145 | SUBROUTINE fftx_tr_xy( f_in, f_out ) |
---|
1146 | |
---|
1147 | |
---|
1148 | USE control_parameters, & |
---|
1149 | ONLY: host |
---|
1150 | |
---|
1151 | USE cpulog, & |
---|
1152 | ONLY: cpu_log, log_point_s |
---|
1153 | |
---|
1154 | USE kinds |
---|
1155 | |
---|
1156 | USE pegrid |
---|
1157 | |
---|
1158 | IMPLICIT NONE |
---|
1159 | |
---|
1160 | INTEGER(iwp) :: i !< |
---|
1161 | INTEGER(iwp) :: j !< |
---|
1162 | INTEGER(iwp) :: k !< |
---|
1163 | |
---|
1164 | REAL(wp), DIMENSION(0:nx,1:nz,nys:nyn) :: work_fftx !< |
---|
1165 | REAL(wp), DIMENSION(1:nz,nys:nyn,0:nx) :: f_in !< |
---|
1166 | REAL(wp), DIMENSION(nny,1:nz,nxl_y:nxr_y,pdims(2)) :: f_out !< |
---|
1167 | REAL(wp), DIMENSION(nys:nyn,1:nz,0:nx) :: work !< |
---|
1168 | |
---|
1169 | ! |
---|
1170 | !-- Carry out the FFT along x, where all data are present due to the |
---|
1171 | !-- 1d-decomposition along y. Resort the data in a way that y becomes |
---|
1172 | !-- the first index. |
---|
1173 | CALL cpu_log( log_point_s(4), 'fft_x_1d', 'start' ) |
---|
1174 | |
---|
1175 | IF ( host(1:3) == 'nec' ) THEN |
---|
1176 | ! |
---|
1177 | !-- Code for vector processors |
---|
1178 | !$OMP PARALLEL PRIVATE ( i, j, k ) |
---|
1179 | !$OMP DO |
---|
1180 | DO i = 0, nx |
---|
1181 | |
---|
1182 | DO j = nys, nyn |
---|
1183 | DO k = 1, nz |
---|
1184 | work_fftx(i,k,j) = f_in(k,j,i) |
---|
1185 | ENDDO |
---|
1186 | ENDDO |
---|
1187 | |
---|
1188 | ENDDO |
---|
1189 | |
---|
1190 | !$OMP DO |
---|
1191 | DO j = nys, nyn |
---|
1192 | |
---|
1193 | CALL fft_x_m( work_fftx(:,:,j), 'forward' ) |
---|
1194 | |
---|
1195 | DO k = 1, nz |
---|
1196 | DO i = 0, nx |
---|
1197 | work(j,k,i) = work_fftx(i,k,j) |
---|
1198 | ENDDO |
---|
1199 | ENDDO |
---|
1200 | |
---|
1201 | ENDDO |
---|
1202 | !$OMP END PARALLEL |
---|
1203 | |
---|
1204 | ELSE |
---|
1205 | |
---|
1206 | ! |
---|
1207 | !-- Cache optimized code (there might be still a potential for better |
---|
1208 | !-- optimization). |
---|
1209 | !$OMP PARALLEL PRIVATE (i,j,k) |
---|
1210 | !$OMP DO |
---|
1211 | DO i = 0, nx |
---|
1212 | |
---|
1213 | DO j = nys, nyn |
---|
1214 | DO k = 1, nz |
---|
1215 | work_fftx(i,k,j) = f_in(k,j,i) |
---|
1216 | ENDDO |
---|
1217 | ENDDO |
---|
1218 | |
---|
1219 | ENDDO |
---|
1220 | |
---|
1221 | !$OMP DO |
---|
1222 | DO j = nys, nyn |
---|
1223 | DO k = 1, nz |
---|
1224 | |
---|
1225 | CALL fft_x_1d( work_fftx(0:nx,k,j), 'forward' ) |
---|
1226 | |
---|
1227 | DO i = 0, nx |
---|
1228 | work(j,k,i) = work_fftx(i,k,j) |
---|
1229 | ENDDO |
---|
1230 | ENDDO |
---|
1231 | |
---|
1232 | ENDDO |
---|
1233 | !$OMP END PARALLEL |
---|
1234 | |
---|
1235 | ENDIF |
---|
1236 | CALL cpu_log( log_point_s(4), 'fft_x_1d', 'pause' ) |
---|
1237 | |
---|
1238 | ! |
---|
1239 | !-- Transpose array |
---|
1240 | #if defined( __parallel ) |
---|
1241 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'start' ) |
---|
1242 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
---|
1243 | CALL MPI_ALLTOALL( work(nys,1,0), sendrecvcount_xy, MPI_REAL, & |
---|
1244 | f_out(1,1,nxl_y,1), sendrecvcount_xy, MPI_REAL, & |
---|
1245 | comm1dy, ierr ) |
---|
1246 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'stop' ) |
---|
1247 | #endif |
---|
1248 | |
---|
1249 | END SUBROUTINE fftx_tr_xy |
---|
1250 | |
---|
1251 | |
---|
1252 | !------------------------------------------------------------------------------! |
---|
1253 | ! Description: |
---|
1254 | ! ------------ |
---|
1255 | !> Transposition y --> x with a subsequent backward Fourier transformation for |
---|
1256 | !> a 1d-decomposition along x. |
---|
1257 | !------------------------------------------------------------------------------! |
---|
1258 | SUBROUTINE tr_yx_fftx( f_in, f_out ) |
---|
1259 | |
---|
1260 | |
---|
1261 | USE control_parameters, & |
---|
1262 | ONLY: host |
---|
1263 | |
---|
1264 | USE cpulog, & |
---|
1265 | ONLY: cpu_log, log_point_s |
---|
1266 | |
---|
1267 | USE kinds |
---|
1268 | |
---|
1269 | USE pegrid |
---|
1270 | |
---|
1271 | IMPLICIT NONE |
---|
1272 | |
---|
1273 | INTEGER(iwp) :: i !< |
---|
1274 | INTEGER(iwp) :: j !< |
---|
1275 | INTEGER(iwp) :: k !< |
---|
1276 | |
---|
1277 | REAL(wp), DIMENSION(0:nx,1:nz,nys:nyn) :: work_fftx !< |
---|
1278 | REAL(wp), DIMENSION(nny,1:nz,nxl_y:nxr_y,pdims(2)) :: f_in !< |
---|
1279 | REAL(wp), DIMENSION(1:nz,nys:nyn,0:nx) :: f_out !< |
---|
1280 | REAL(wp), DIMENSION(nys:nyn,1:nz,0:nx) :: work !< |
---|
1281 | |
---|
1282 | ! |
---|
1283 | !-- Transpose array |
---|
1284 | #if defined( __parallel ) |
---|
1285 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'start' ) |
---|
1286 | IF ( collective_wait ) CALL MPI_BARRIER( comm2d, ierr ) |
---|
1287 | CALL MPI_ALLTOALL( f_in(1,1,nxl_y,1), sendrecvcount_xy, MPI_REAL, & |
---|
1288 | work(nys,1,0), sendrecvcount_xy, MPI_REAL, & |
---|
1289 | comm1dy, ierr ) |
---|
1290 | CALL cpu_log( log_point_s(32), 'mpi_alltoall', 'stop' ) |
---|
1291 | #endif |
---|
1292 | |
---|
1293 | ! |
---|
1294 | !-- Carry out the FFT along x, where all data are present due to the |
---|
1295 | !-- 1d-decomposition along y. Resort the data in a way that y becomes |
---|
1296 | !-- the first index. |
---|
1297 | CALL cpu_log( log_point_s(4), 'fft_x_1d', 'continue' ) |
---|
1298 | |
---|
1299 | IF ( host(1:3) == 'nec' ) THEN |
---|
1300 | ! |
---|
1301 | !-- Code optimized for vector processors |
---|
1302 | !$OMP PARALLEL PRIVATE ( i, j, k ) |
---|
1303 | !$OMP DO |
---|
1304 | DO j = nys, nyn |
---|
1305 | |
---|
1306 | DO k = 1, nz |
---|
1307 | DO i = 0, nx |
---|
1308 | work_fftx(i,k,j) = work(j,k,i) |
---|
1309 | ENDDO |
---|
1310 | ENDDO |
---|
1311 | |
---|
1312 | CALL fft_x_m( work_fftx(:,:,j), 'backward' ) |
---|
1313 | |
---|
1314 | ENDDO |
---|
1315 | |
---|
1316 | !$OMP DO |
---|
1317 | DO i = 0, nx |
---|
1318 | DO j = nys, nyn |
---|
1319 | DO k = 1, nz |
---|
1320 | f_out(k,j,i) = work_fftx(i,k,j) |
---|
1321 | ENDDO |
---|
1322 | ENDDO |
---|
1323 | ENDDO |
---|
1324 | !$OMP END PARALLEL |
---|
1325 | |
---|
1326 | ELSE |
---|
1327 | |
---|
1328 | ! |
---|
1329 | !-- Cache optimized code (there might be still a potential for better |
---|
1330 | !-- optimization). |
---|
1331 | !$OMP PARALLEL PRIVATE (i,j,k) |
---|
1332 | !$OMP DO |
---|
1333 | DO j = nys, nyn |
---|
1334 | DO k = 1, nz |
---|
1335 | |
---|
1336 | DO i = 0, nx |
---|
1337 | work_fftx(i,k,j) = work(j,k,i) |
---|
1338 | ENDDO |
---|
1339 | |
---|
1340 | CALL fft_x_1d( work_fftx(0:nx,k,j), 'backward' ) |
---|
1341 | |
---|
1342 | ENDDO |
---|
1343 | ENDDO |
---|
1344 | |
---|
1345 | !$OMP DO |
---|
1346 | DO i = 0, nx |
---|
1347 | DO j = nys, nyn |
---|
1348 | DO k = 1, nz |
---|
1349 | f_out(k,j,i) = work_fftx(i,k,j) |
---|
1350 | ENDDO |
---|
1351 | ENDDO |
---|
1352 | ENDDO |
---|
1353 | !$OMP END PARALLEL |
---|
1354 | |
---|
1355 | ENDIF |
---|
1356 | CALL cpu_log( log_point_s(4), 'fft_x_1d', 'stop' ) |
---|
1357 | |
---|
1358 | END SUBROUTINE tr_yx_fftx |
---|
1359 | |
---|
1360 | |
---|
1361 | !------------------------------------------------------------------------------! |
---|
1362 | ! Description: |
---|
1363 | ! ------------ |
---|
1364 | !> FFT along y, solution of the tridiagonal system and backward FFT for |
---|
1365 | !> a 1d-decomposition along y. |
---|
1366 | !> |
---|
1367 | !> @warning this subroutine may still not work for hybrid parallelization |
---|
1368 | !> with OpenMP (for possible necessary changes see the original |
---|
1369 | !> routine poisfft_hybrid, developed by Klaus Ketelsen, May 2002) |
---|
1370 | !------------------------------------------------------------------------------! |
---|
1371 | SUBROUTINE ffty_tri_ffty( ar ) |
---|
1372 | |
---|
1373 | |
---|
1374 | USE control_parameters, & |
---|
1375 | ONLY: host |
---|
1376 | |
---|
1377 | USE cpulog, & |
---|
1378 | ONLY: cpu_log, log_point_s |
---|
1379 | |
---|
1380 | USE grid_variables, & |
---|
1381 | ONLY: ddx2, ddy2 |
---|
1382 | |
---|
1383 | USE kinds |
---|
1384 | |
---|
1385 | USE pegrid |
---|
1386 | |
---|
1387 | IMPLICIT NONE |
---|
1388 | |
---|
1389 | INTEGER(iwp) :: i !< |
---|
1390 | INTEGER(iwp) :: j !< |
---|
1391 | INTEGER(iwp) :: k !< |
---|
1392 | INTEGER(iwp) :: m !< |
---|
1393 | INTEGER(iwp) :: n !< |
---|
1394 | INTEGER(iwp) :: omp_get_thread_num !< |
---|
1395 | INTEGER(iwp) :: tn !< |
---|
1396 | |
---|
1397 | REAL(wp), DIMENSION(0:ny) :: work_ffty !< |
---|
1398 | REAL(wp), DIMENSION(0:ny,1:nz) :: work_triy !< |
---|
1399 | REAL(wp), DIMENSION(nny,1:nz,nxl_y:nxr_y,pdims(2)) :: ar !< |
---|
1400 | REAL(wp), DIMENSION(:,:,:,:), ALLOCATABLE :: tri !< |
---|
1401 | |
---|
1402 | |
---|
1403 | CALL cpu_log( log_point_s(39), 'fft_y_1d + tridia', 'start' ) |
---|
1404 | |
---|
1405 | ALLOCATE( tri(5,0:ny,0:nz-1,0:threads_per_task-1) ) |
---|
1406 | |
---|
1407 | tn = 0 ! Default thread number in case of one thread |
---|
1408 | !$OMP PARALLEL DO PRIVATE ( i, j, k, m, n, tn, work_ffty, work_triy ) |
---|
1409 | DO i = nxl_y, nxr_y |
---|
1410 | |
---|
1411 | !$ tn = omp_get_thread_num() |
---|
1412 | |
---|
1413 | IF ( host(1:3) == 'nec' ) THEN |
---|
1414 | ! |
---|
1415 | !-- Code optimized for vector processors |
---|
1416 | DO k = 1, nz |
---|
1417 | |
---|
1418 | m = 0 |
---|
1419 | DO n = 1, pdims(2) |
---|
1420 | DO j = 1, nny |
---|
1421 | work_triy(m,k) = ar(j,k,i,n) |
---|
1422 | m = m + 1 |
---|
1423 | ENDDO |
---|
1424 | ENDDO |
---|
1425 | |
---|
1426 | ENDDO |
---|
1427 | |
---|
1428 | CALL fft_y_m( work_triy, ny, 'forward' ) |
---|
1429 | |
---|
1430 | ELSE |
---|
1431 | ! |
---|
1432 | !-- Cache optimized code |
---|
1433 | DO k = 1, nz |
---|
1434 | |
---|
1435 | m = 0 |
---|
1436 | DO n = 1, pdims(2) |
---|
1437 | DO j = 1, nny |
---|
1438 | work_ffty(m) = ar(j,k,i,n) |
---|
1439 | m = m + 1 |
---|
1440 | ENDDO |
---|
1441 | ENDDO |
---|
1442 | |
---|
1443 | CALL fft_y_1d( work_ffty, 'forward' ) |
---|
1444 | |
---|
1445 | DO j = 0, ny |
---|
1446 | work_triy(j,k) = work_ffty(j) |
---|
1447 | ENDDO |
---|
1448 | |
---|
1449 | ENDDO |
---|
1450 | |
---|
1451 | ENDIF |
---|
1452 | |
---|
1453 | ! |
---|
1454 | !-- Solve the linear equation system |
---|
1455 | CALL tridia_1dd( ddy2, ddx2, ny, nx, i, work_triy, tri(:,:,:,tn) ) |
---|
1456 | |
---|
1457 | IF ( host(1:3) == 'nec' ) THEN |
---|
1458 | ! |
---|
1459 | !-- Code optimized for vector processors |
---|
1460 | CALL fft_y_m( work_triy, ny, 'backward' ) |
---|
1461 | |
---|
1462 | DO k = 1, nz |
---|
1463 | |
---|
1464 | m = 0 |
---|
1465 | DO n = 1, pdims(2) |
---|
1466 | DO j = 1, nny |
---|
1467 | ar(j,k,i,n) = work_triy(m,k) |
---|
1468 | m = m + 1 |
---|
1469 | ENDDO |
---|
1470 | ENDDO |
---|
1471 | |
---|
1472 | ENDDO |
---|
1473 | |
---|
1474 | ELSE |
---|
1475 | ! |
---|
1476 | !-- Cache optimized code |
---|
1477 | DO k = 1, nz |
---|
1478 | |
---|
1479 | DO j = 0, ny |
---|
1480 | work_ffty(j) = work_triy(j,k) |
---|
1481 | ENDDO |
---|
1482 | |
---|
1483 | CALL fft_y_1d( work_ffty, 'backward' ) |
---|
1484 | |
---|
1485 | m = 0 |
---|
1486 | DO n = 1, pdims(2) |
---|
1487 | DO j = 1, nny |
---|
1488 | ar(j,k,i,n) = work_ffty(m) |
---|
1489 | m = m + 1 |
---|
1490 | ENDDO |
---|
1491 | ENDDO |
---|
1492 | |
---|
1493 | ENDDO |
---|
1494 | |
---|
1495 | ENDIF |
---|
1496 | |
---|
1497 | ENDDO |
---|
1498 | |
---|
1499 | DEALLOCATE( tri ) |
---|
1500 | |
---|
1501 | CALL cpu_log( log_point_s(39), 'fft_y_1d + tridia', 'stop' ) |
---|
1502 | |
---|
1503 | END SUBROUTINE ffty_tri_ffty |
---|
1504 | |
---|
1505 | END MODULE poisfft_mod |
---|