1 | PROGRAM find_palm_config |
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2 | |
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3 | !------------------------------------------------------------------------------! |
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4 | ! This file is part of PALM. |
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5 | ! |
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6 | ! PALM is free software: you can redistribute it and/or modify it under the terms |
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7 | ! of the GNU General Public License as published by the Free Software Foundation, |
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8 | ! either version 3 of the License, or (at your option) any later 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 1997-2012 Leibniz University 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 | ! Former revisions: |
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24 | ! ----------------- |
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25 | ! $Id: find_palm_config.f90 1047 2012-11-09 15:32:58Z banzhafs $ |
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26 | ! |
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27 | ! 1046 2012-11-09 14:38:45Z maronga |
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28 | ! code put under GPL (PALM 3.9) |
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29 | ! |
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30 | ! |
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31 | ! Description: |
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32 | ! ------------- |
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33 | ! Find possible configurations for given processor and grid point numbers |
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34 | !------------------------------------------------------------------------------! |
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35 | |
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36 | IMPLICIT NONE |
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37 | |
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38 | CHARACTER (LEN=1) :: char = '' |
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39 | INTEGER :: count = 0, i, ii(1), j, k, maximum_grid_level, mg_levels_x, & |
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40 | mg_levels_y, mg_levels_z, n, numprocs, numprocs_max, & |
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41 | numprocs_min, nx, nxanz, nx_max, nx_min, ny, nyanz, ny_max, & |
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42 | ny_min, nz, nz_max, nz_min, pdims(2) |
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43 | INTEGER :: numnx(10000), numpr(10000) |
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44 | LOGICAL :: cubic_domain = .FALSE., found, found_once = .FALSE., & |
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45 | one_d_decomp = .FALSE., quadratic_domain_xy = .FALSE. |
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46 | REAL :: grid_ratio, grid_ratio_new, maximum_grid_ratio, tolerance, & |
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47 | tolerance_nx, tolerance_ny, tolerance_nz |
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48 | REAL :: gridratio(10000) |
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49 | |
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50 | TYPE configuration |
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51 | REAL :: grid_ratio |
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52 | INTEGER :: numprocs, pdims_1, pdims_2, nx, ny, nz, nxanz, & |
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53 | nyanz, grid_levels, nx_mg, ny_mg, nz_mg |
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54 | END TYPE configuration |
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55 | |
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56 | TYPE(configuration), DIMENSION(10000) :: config |
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57 | |
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58 | ! |
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59 | !-- Ask number of processors available |
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60 | PRINT*, '*** number of PEs available + allowed tolerance:' |
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61 | READ (*,*) numprocs, tolerance |
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62 | IF ( tolerance < 0.0 ) THEN |
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63 | numprocs_max = numprocs |
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64 | numprocs_min = numprocs * ( 1.0 + tolerance ) |
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65 | ELSE |
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66 | numprocs_max = numprocs * ( 1.0 + tolerance ) |
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67 | numprocs_min = numprocs * ( 1.0 - tolerance ) |
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68 | ENDIF |
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69 | |
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70 | ! |
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71 | !-- Ask for 1D-decomposition |
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72 | PRINT*, ' ' |
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73 | PRINT*, ' ' |
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74 | PRINT*, '*** shall a 1d-decomposition along x be used (y/n)?' |
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75 | READ (*,*) char |
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76 | IF ( char == 'y' ) one_d_decomp = .TRUE. |
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77 | |
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78 | ! |
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79 | !-- Ask for quadratic domain |
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80 | PRINT*, ' ' |
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81 | PRINT*, ' ' |
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82 | PRINT*, '*** shall a quadratic domain along x and y be used (y/n)?' |
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83 | READ (*,*) char |
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84 | IF ( char == 'y' ) THEN |
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85 | quadratic_domain_xy = .TRUE. |
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86 | PRINT*, ' ' |
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87 | PRINT*, ' ' |
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88 | PRINT*, '*** shall also grid points along z be equal to x and y (y/n)?' |
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89 | READ (*,*) char |
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90 | IF ( char == 'y' ) cubic_domain = .TRUE. |
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91 | ENDIF |
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92 | |
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93 | ! |
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94 | !-- Read number of gridpoints in each direction |
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95 | PRINT*, ' ' |
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96 | PRINT*, ' ' |
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97 | PRINT*, '*** please type nx + allowed tolerance:' |
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98 | READ (*,*) nx, tolerance_nx |
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99 | IF ( tolerance_nx < 0.0 ) THEN |
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100 | nx_max = nx |
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101 | nx_min = nx * ( 1.0 + tolerance_nx ) |
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102 | ELSE |
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103 | nx_max = nx * ( 1.0 + tolerance_nx ) |
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104 | nx_min = nx * ( 1.0 - tolerance_nx ) |
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105 | ENDIF |
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106 | IF ( quadratic_domain_xy ) THEN |
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107 | ny = nx |
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108 | tolerance_ny = tolerance_nx |
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109 | ELSE |
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110 | PRINT*, '*** please type ny + allowed tolerance:' |
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111 | READ (*,*) ny, tolerance_ny |
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112 | ENDIF |
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113 | IF ( tolerance_ny < 0.0 ) THEN |
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114 | ny_max = ny |
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115 | ny_min = ny * ( 1.0 + tolerance_ny ) |
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116 | ELSE |
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117 | ny_max = ny * ( 1.0 + tolerance_ny ) |
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118 | ny_min = ny * ( 1.0 - tolerance_ny ) |
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119 | ENDIF |
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120 | IF ( cubic_domain ) THEN |
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121 | nz = nx |
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122 | tolerance_nz = tolerance_nx |
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123 | ELSE |
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124 | PRINT*, '*** please type nz + allowed tolerance:' |
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125 | READ (*,*) nz, tolerance_nz |
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126 | ENDIF |
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127 | IF ( tolerance_nz < 0.0 ) THEN |
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128 | nz_max = nz |
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129 | nz_min = nz * ( 1.0 + tolerance_nz ) |
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130 | ELSE |
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131 | nz_max = nz * ( 1.0 + tolerance_nz ) |
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132 | nz_min = nz * ( 1.0 - tolerance_nz ) |
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133 | ENDIF |
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134 | |
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135 | ! |
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136 | !-- Read maximum gridpoint-ratio for which results shall be printed |
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137 | PRINT*, ' ' |
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138 | PRINT*, '*** please type maximum subdomain gridpoint-ratio' |
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139 | PRINT*, ' ( ABS( nx_sub / ny_sub - 1.0 ) ) for which results shall be' |
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140 | PRINT*, ' printed' |
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141 | READ (*,*) maximum_grid_ratio |
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142 | |
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143 | ! |
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144 | !-- Loop over allowed numbers of processors |
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145 | g: DO n = numprocs_max, numprocs_min, -1 |
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146 | |
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147 | ! |
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148 | !-- Set initial configuration |
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149 | numprocs = n |
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150 | pdims(1) = numprocs + 1 |
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151 | pdims(2) = 1 |
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152 | |
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153 | ! |
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154 | !-- Looking for practicable virtual processor grids |
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155 | p: DO WHILE ( pdims(1) > 1 ) |
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156 | |
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157 | pdims(1) = pdims(1) - 1 |
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158 | |
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159 | ! |
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160 | !-- Create the virtual PE-grid topology |
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161 | IF ( MOD( numprocs , pdims(1) ) /= 0 ) THEN |
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162 | CYCLE p |
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163 | ELSE |
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164 | IF ( one_d_decomp .AND. pdims(1) < numprocs ) CYCLE g |
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165 | ENDIF |
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166 | pdims(2) = numprocs / pdims(1) |
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167 | |
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168 | xn: DO nx = nx_min, nx_max |
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169 | ! |
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170 | !-- Proof, if grid points in x-direction can be distributed without |
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171 | !-- rest to the processors in x- and y-direction |
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172 | IF ( MOD(nx+1, pdims(1)) /= 0 .OR. & |
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173 | MOD(nx+1, pdims(2)) /= 0 ) CYCLE xn |
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174 | nxanz = ( nx + 1 ) / pdims(1) |
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175 | |
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176 | yn: DO ny = ny_min, ny_max |
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177 | ! |
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178 | !-- Eventually exit in case of non quadratic domains |
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179 | IF ( quadratic_domain_xy .AND. ny /= nx ) CYCLE yn |
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180 | ! |
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181 | !-- Proof, if grid points in y-direction can be distributed without |
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182 | !-- rest to the processors in x- and y-direction |
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183 | IF ( MOD( ny+1 , pdims(2) ) /= 0 .OR. & |
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184 | MOD( ny+1, pdims(1) ) /= 0 ) CYCLE yn |
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185 | nyanz = ( ny + 1 ) / pdims(2) |
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186 | |
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187 | grid_ratio = ABS( REAL( nxanz ) / REAL( nyanz ) - 1.0 ) |
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188 | |
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189 | zn: DO nz = nz_min, nz_max |
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190 | ! |
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191 | !-- Eventually exit in case of non cubic domains |
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192 | IF ( cubic_domain .AND. nz /= nx ) CYCLE zn |
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193 | ! |
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194 | !-- Proof, if grid points in z-direction can be distributed |
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195 | !-- without rest to the processors in x-direction |
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196 | IF ( MOD( nz, pdims(1) ) /= 0 .AND. .NOT. one_d_decomp ) & |
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197 | THEN |
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198 | CYCLE zn |
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199 | ENDIF |
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200 | |
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201 | ! |
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202 | !-- Store configuration found |
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203 | IF ( grid_ratio < maximum_grid_ratio ) THEN |
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204 | found = .TRUE. |
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205 | count = count + 1 |
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206 | config(count)%grid_ratio = grid_ratio |
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207 | config(count)%numprocs = numprocs |
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208 | config(count)%pdims_1 = pdims(1) |
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209 | config(count)%pdims_2 = pdims(2) |
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210 | config(count)%nx = nx |
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211 | config(count)%ny = ny |
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212 | config(count)%nz = nz |
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213 | config(count)%nxanz = nxanz |
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214 | config(count)%nyanz = nyanz |
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215 | IF ( count == 10000 ) THEN |
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216 | PRINT*, '+++ more than 10000 configurations' |
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217 | EXIT g |
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218 | ENDIF |
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219 | ENDIF |
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220 | |
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221 | IF ( one_d_decomp ) CYCLE yn |
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222 | |
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223 | ENDDO zn |
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224 | |
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225 | ENDDO yn |
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226 | |
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227 | ENDDO xn |
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228 | |
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229 | ENDDO p |
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230 | |
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231 | ENDDO g |
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232 | |
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233 | IF ( .NOT. found ) THEN |
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234 | PRINT*, ' ' |
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235 | PRINT*, '+++ No valid processor grid found for the given number of' |
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236 | PRINT*, ' processors and gridpoints' |
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237 | STOP |
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238 | ENDIF |
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239 | |
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240 | ! |
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241 | !-- Calculate number of possible grid levels and gridpoints of the coarsest grid |
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242 | !-- used by the multigrid method |
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243 | DO n = 1, count |
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244 | mg_levels_x = 1 |
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245 | mg_levels_y = 1 |
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246 | mg_levels_z = 1 |
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247 | |
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248 | i = config(n)%nxanz |
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249 | DO WHILE ( MOD( i, 2 ) == 0 .AND. i /= 2 ) |
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250 | i = i / 2 |
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251 | mg_levels_x = mg_levels_x + 1 |
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252 | ENDDO |
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253 | |
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254 | j = config(n)%nyanz |
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255 | DO WHILE ( MOD( j, 2 ) == 0 .AND. j /= 2 ) |
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256 | j = j / 2 |
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257 | mg_levels_y = mg_levels_y + 1 |
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258 | ENDDO |
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259 | |
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260 | k = config(n)%nz |
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261 | DO WHILE ( MOD( k, 2 ) == 0 .AND. k /= 2 ) |
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262 | k = k / 2 |
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263 | mg_levels_z = mg_levels_z + 1 |
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264 | ENDDO |
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265 | |
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266 | maximum_grid_level = MIN( mg_levels_x, mg_levels_y, mg_levels_z ) |
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267 | config(n)%grid_levels = maximum_grid_level |
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268 | config(n)%nx_mg = config(n)%nxanz / 2**(maximum_grid_level-1) |
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269 | config(n)%ny_mg = config(n)%nyanz / 2**(maximum_grid_level-1) |
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270 | config(n)%nz_mg = config(n)%nz / 2**(maximum_grid_level-1) |
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271 | ENDDO |
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272 | |
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273 | ! |
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274 | !-- Print the configurations computed above |
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275 | PRINT*, ' ' |
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276 | PRINT*, ' ' |
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277 | PRINT*, '*** print out results in ascending grid-ratio order (y/n)?' |
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278 | READ (*,*) char |
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279 | IF ( char == 'y' ) THEN |
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280 | gridratio = 10000.0 |
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281 | gridratio(1:count) = config(1:count)%grid_ratio |
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282 | WRITE ( *, * ) ' ' |
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283 | WRITE ( *, * ) 'Possible configurations found:' |
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284 | WRITE ( *, * ) 'sorted in ascending grid-ratio order' |
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285 | WRITE ( *, 100 ) |
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286 | DO |
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287 | ii = MINLOC( gridratio ) |
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288 | i = ii(1) |
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289 | IF ( gridratio(i) /= 10000.0 ) THEN |
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290 | WRITE ( *, 101 ) & |
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291 | config(i)%grid_ratio, config(i)%numprocs, config(i)%pdims_1, & |
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292 | config(i)%pdims_2, config(i)%nx, config(i)%ny, config(i)%nz, & |
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293 | config(i)%nxanz, config(i)%nyanz, config(i)%grid_levels, & |
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294 | config(i)%nx_mg, config(i)%ny_mg, config(i)%nz_mg |
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295 | gridratio(i) = 10000.0 |
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296 | ELSE |
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297 | EXIT |
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298 | ENDIF |
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299 | ENDDO |
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300 | ENDIF |
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301 | |
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302 | PRINT*, ' ' |
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303 | PRINT*, ' ' |
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304 | PRINT*, '*** print out results in descending PE order (y/n)?' |
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305 | READ (*,*) char |
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306 | IF ( char == 'y' ) THEN |
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307 | numpr = 0 |
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308 | numpr(1:count) = config(1:count)%numprocs |
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309 | WRITE ( *, * ) ' ' |
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310 | WRITE ( *, * ) 'Possible configurations found:' |
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311 | WRITE ( *, * ) 'sorted after number of PEs' |
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312 | WRITE ( *, 100 ) |
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313 | DO |
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314 | ii = MAXLOC( numpr ) |
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315 | i = ii(1) |
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316 | IF ( numpr(i) /= 0 ) THEN |
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317 | WRITE ( *, 101 ) & |
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318 | config(i)%grid_ratio, config(i)%numprocs, config(i)%pdims_1, & |
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319 | config(i)%pdims_2, config(i)%nx, config(i)%ny, config(i)%nz, & |
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320 | config(i)%nxanz, config(i)%nyanz, config(i)%grid_levels, & |
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321 | config(i)%nx_mg, config(i)%ny_mg, config(i)%nz_mg |
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322 | numpr(i) = 0 |
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323 | ELSE |
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324 | EXIT |
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325 | ENDIF |
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326 | ENDDO |
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327 | ENDIF |
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328 | |
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329 | PRINT*, ' ' |
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330 | PRINT*, ' ' |
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331 | PRINT*, '*** print out results in descending grid size order (y/n)?' |
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332 | READ (*,*) char |
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333 | IF ( char == 'y' ) THEN |
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334 | numnx = 0 |
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335 | DO i = 1, count |
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336 | numnx(i) = config(i)%nx * config(i)%ny * config(i)%nz |
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337 | ENDDO |
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338 | WRITE ( *, * ) ' ' |
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339 | WRITE ( *, * ) 'Possible configurations found:' |
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340 | WRITE ( *, * ) 'sorted after grid size' |
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341 | WRITE ( *, 100 ) |
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342 | DO |
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343 | ii = MAXLOC( numnx ) |
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344 | i = ii(1) |
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345 | IF ( numnx(i) /= 0 ) THEN |
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346 | WRITE ( *, 101 ) & |
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347 | config(i)%grid_ratio, config(i)%numprocs, config(i)%pdims_1, & |
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348 | config(i)%pdims_2, config(i)%nx, config(i)%ny, config(i)%nz, & |
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349 | config(i)%nxanz, config(i)%nyanz, config(i)%grid_levels, & |
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350 | config(i)%nx_mg, config(i)%ny_mg, config(i)%nz_mg |
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351 | numnx(i) = 0 |
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352 | ELSE |
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353 | EXIT |
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354 | ENDIF |
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355 | ENDDO |
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356 | ENDIF |
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357 | |
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358 | 100 FORMAT('ratio PEs PE-grid nx ny nz subdomain grid_levels ', & |
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359 | 'coarsest subd.') |
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360 | 101 FORMAT(F4.2,2X,I4,' (',I4,',',I4,')',2X,I4,1X,I4,1X,I4,' (',I4,',',I4,')', & |
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361 | 5X,I2,7X,'(',I3,',',I3,',',I3,')') |
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362 | |
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363 | END PROGRAM find_palm_config |
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