| 1 | PROGRAM find_palm_config |
|---|
| 2 | |
|---|
| 3 | !------------------------------------------------------------------------------! |
|---|
| 4 | ! This file is part of PALM. |
|---|
| 5 | ! |
|---|
| 6 | ! PALM is free software: you can redistribute it and/or modify it under the terms |
|---|
| 7 | ! of the GNU General Public License as published by the Free Software Foundation, |
|---|
| 8 | ! either version 3 of the License, or (at your option) any later version. |
|---|
| 9 | ! |
|---|
| 10 | ! PALM is distributed in the hope that it will be useful, but WITHOUT ANY |
|---|
| 11 | ! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR |
|---|
| 12 | ! A PARTICULAR PURPOSE. See the GNU General Public License for more details. |
|---|
| 13 | ! |
|---|
| 14 | ! You should have received a copy of the GNU General Public License along with |
|---|
| 15 | ! PALM. If not, see <http://www.gnu.org/licenses/>. |
|---|
| 16 | ! |
|---|
| 17 | ! Copyright 1997-2014 Leibniz Universitaet Hannover |
|---|
| 18 | !--------------------------------------------------------------------------------! |
|---|
| 19 | ! |
|---|
| 20 | ! Current revisions: |
|---|
| 21 | ! ----------------- |
|---|
| 22 | ! |
|---|
| 23 | ! Former revisions: |
|---|
| 24 | ! ----------------- |
|---|
| 25 | ! $Id: find_palm_config.f90 1310 2014-03-14 08:01:56Z maronga $ |
|---|
| 26 | ! |
|---|
| 27 | ! 1046 2012-11-09 14:38:45Z maronga |
|---|
| 28 | ! code put under GPL (PALM 3.9) |
|---|
| 29 | ! |
|---|
| 30 | ! |
|---|
| 31 | ! Description: |
|---|
| 32 | ! ------------- |
|---|
| 33 | ! Find possible configurations for given processor and grid point numbers |
|---|
| 34 | !------------------------------------------------------------------------------! |
|---|
| 35 | |
|---|
| 36 | IMPLICIT NONE |
|---|
| 37 | |
|---|
| 38 | CHARACTER (LEN=1) :: char = '' |
|---|
| 39 | INTEGER :: count = 0, i, ii(1), j, k, maximum_grid_level, mg_levels_x, & |
|---|
| 40 | mg_levels_y, mg_levels_z, n, numprocs, numprocs_max, & |
|---|
| 41 | numprocs_min, nx, nxanz, nx_max, nx_min, ny, nyanz, ny_max, & |
|---|
| 42 | ny_min, nz, nz_max, nz_min, pdims(2) |
|---|
| 43 | INTEGER :: numnx(10000), numpr(10000) |
|---|
| 44 | LOGICAL :: cubic_domain = .FALSE., found, found_once = .FALSE., & |
|---|
| 45 | one_d_decomp = .FALSE., quadratic_domain_xy = .FALSE. |
|---|
| 46 | REAL :: grid_ratio, grid_ratio_new, maximum_grid_ratio, tolerance, & |
|---|
| 47 | tolerance_nx, tolerance_ny, tolerance_nz |
|---|
| 48 | REAL :: gridratio(10000) |
|---|
| 49 | |
|---|
| 50 | TYPE configuration |
|---|
| 51 | REAL :: grid_ratio |
|---|
| 52 | INTEGER :: numprocs, pdims_1, pdims_2, nx, ny, nz, nxanz, & |
|---|
| 53 | nyanz, grid_levels, nx_mg, ny_mg, nz_mg |
|---|
| 54 | END TYPE configuration |
|---|
| 55 | |
|---|
| 56 | TYPE(configuration), DIMENSION(10000) :: config |
|---|
| 57 | |
|---|
| 58 | ! |
|---|
| 59 | !-- Ask number of processors available |
|---|
| 60 | PRINT*, '*** number of PEs available + allowed tolerance:' |
|---|
| 61 | READ (*,*) numprocs, tolerance |
|---|
| 62 | IF ( tolerance < 0.0 ) THEN |
|---|
| 63 | numprocs_max = numprocs |
|---|
| 64 | numprocs_min = numprocs * ( 1.0 + tolerance ) |
|---|
| 65 | ELSE |
|---|
| 66 | numprocs_max = numprocs * ( 1.0 + tolerance ) |
|---|
| 67 | numprocs_min = numprocs * ( 1.0 - tolerance ) |
|---|
| 68 | ENDIF |
|---|
| 69 | |
|---|
| 70 | ! |
|---|
| 71 | !-- Ask for 1D-decomposition |
|---|
| 72 | PRINT*, ' ' |
|---|
| 73 | PRINT*, ' ' |
|---|
| 74 | PRINT*, '*** shall a 1d-decomposition along x be used (y/n)?' |
|---|
| 75 | READ (*,*) char |
|---|
| 76 | IF ( char == 'y' ) one_d_decomp = .TRUE. |
|---|
| 77 | |
|---|
| 78 | ! |
|---|
| 79 | !-- Ask for quadratic domain |
|---|
| 80 | PRINT*, ' ' |
|---|
| 81 | PRINT*, ' ' |
|---|
| 82 | PRINT*, '*** shall a quadratic domain along x and y be used (y/n)?' |
|---|
| 83 | READ (*,*) char |
|---|
| 84 | IF ( char == 'y' ) THEN |
|---|
| 85 | quadratic_domain_xy = .TRUE. |
|---|
| 86 | PRINT*, ' ' |
|---|
| 87 | PRINT*, ' ' |
|---|
| 88 | PRINT*, '*** shall also grid points along z be equal to x and y (y/n)?' |
|---|
| 89 | READ (*,*) char |
|---|
| 90 | IF ( char == 'y' ) cubic_domain = .TRUE. |
|---|
| 91 | ENDIF |
|---|
| 92 | |
|---|
| 93 | ! |
|---|
| 94 | !-- Read number of gridpoints in each direction |
|---|
| 95 | PRINT*, ' ' |
|---|
| 96 | PRINT*, ' ' |
|---|
| 97 | PRINT*, '*** please type nx + allowed tolerance:' |
|---|
| 98 | READ (*,*) nx, tolerance_nx |
|---|
| 99 | IF ( tolerance_nx < 0.0 ) THEN |
|---|
| 100 | nx_max = nx |
|---|
| 101 | nx_min = nx * ( 1.0 + tolerance_nx ) |
|---|
| 102 | ELSE |
|---|
| 103 | nx_max = nx * ( 1.0 + tolerance_nx ) |
|---|
| 104 | nx_min = nx * ( 1.0 - tolerance_nx ) |
|---|
| 105 | ENDIF |
|---|
| 106 | IF ( quadratic_domain_xy ) THEN |
|---|
| 107 | ny = nx |
|---|
| 108 | tolerance_ny = tolerance_nx |
|---|
| 109 | ELSE |
|---|
| 110 | PRINT*, '*** please type ny + allowed tolerance:' |
|---|
| 111 | READ (*,*) ny, tolerance_ny |
|---|
| 112 | ENDIF |
|---|
| 113 | IF ( tolerance_ny < 0.0 ) THEN |
|---|
| 114 | ny_max = ny |
|---|
| 115 | ny_min = ny * ( 1.0 + tolerance_ny ) |
|---|
| 116 | ELSE |
|---|
| 117 | ny_max = ny * ( 1.0 + tolerance_ny ) |
|---|
| 118 | ny_min = ny * ( 1.0 - tolerance_ny ) |
|---|
| 119 | ENDIF |
|---|
| 120 | IF ( cubic_domain ) THEN |
|---|
| 121 | nz = nx |
|---|
| 122 | tolerance_nz = tolerance_nx |
|---|
| 123 | ELSE |
|---|
| 124 | PRINT*, '*** please type nz + allowed tolerance:' |
|---|
| 125 | READ (*,*) nz, tolerance_nz |
|---|
| 126 | ENDIF |
|---|
| 127 | IF ( tolerance_nz < 0.0 ) THEN |
|---|
| 128 | nz_max = nz |
|---|
| 129 | nz_min = nz * ( 1.0 + tolerance_nz ) |
|---|
| 130 | ELSE |
|---|
| 131 | nz_max = nz * ( 1.0 + tolerance_nz ) |
|---|
| 132 | nz_min = nz * ( 1.0 - tolerance_nz ) |
|---|
| 133 | ENDIF |
|---|
| 134 | |
|---|
| 135 | ! |
|---|
| 136 | !-- Read maximum gridpoint-ratio for which results shall be printed |
|---|
| 137 | PRINT*, ' ' |
|---|
| 138 | PRINT*, '*** please type maximum subdomain gridpoint-ratio' |
|---|
| 139 | PRINT*, ' ( ABS( nx_sub / ny_sub - 1.0 ) ) for which results shall be' |
|---|
| 140 | PRINT*, ' printed' |
|---|
| 141 | READ (*,*) maximum_grid_ratio |
|---|
| 142 | |
|---|
| 143 | ! |
|---|
| 144 | !-- Loop over allowed numbers of processors |
|---|
| 145 | g: DO n = numprocs_max, numprocs_min, -1 |
|---|
| 146 | |
|---|
| 147 | ! |
|---|
| 148 | !-- Set initial configuration |
|---|
| 149 | numprocs = n |
|---|
| 150 | pdims(1) = numprocs + 1 |
|---|
| 151 | pdims(2) = 1 |
|---|
| 152 | |
|---|
| 153 | ! |
|---|
| 154 | !-- Looking for practicable virtual processor grids |
|---|
| 155 | p: DO WHILE ( pdims(1) > 1 ) |
|---|
| 156 | |
|---|
| 157 | pdims(1) = pdims(1) - 1 |
|---|
| 158 | |
|---|
| 159 | ! |
|---|
| 160 | !-- Create the virtual PE-grid topology |
|---|
| 161 | IF ( MOD( numprocs , pdims(1) ) /= 0 ) THEN |
|---|
| 162 | CYCLE p |
|---|
| 163 | ELSE |
|---|
| 164 | IF ( one_d_decomp .AND. pdims(1) < numprocs ) CYCLE g |
|---|
| 165 | ENDIF |
|---|
| 166 | pdims(2) = numprocs / pdims(1) |
|---|
| 167 | |
|---|
| 168 | xn: DO nx = nx_min, nx_max |
|---|
| 169 | ! |
|---|
| 170 | !-- Proof, if grid points in x-direction can be distributed without |
|---|
| 171 | !-- rest to the processors in x- and y-direction |
|---|
| 172 | IF ( MOD(nx+1, pdims(1)) /= 0 .OR. & |
|---|
| 173 | MOD(nx+1, pdims(2)) /= 0 ) CYCLE xn |
|---|
| 174 | nxanz = ( nx + 1 ) / pdims(1) |
|---|
| 175 | |
|---|
| 176 | yn: DO ny = ny_min, ny_max |
|---|
| 177 | ! |
|---|
| 178 | !-- Eventually exit in case of non quadratic domains |
|---|
| 179 | IF ( quadratic_domain_xy .AND. ny /= nx ) CYCLE yn |
|---|
| 180 | ! |
|---|
| 181 | !-- Proof, if grid points in y-direction can be distributed without |
|---|
| 182 | !-- rest to the processors in x- and y-direction |
|---|
| 183 | IF ( MOD( ny+1 , pdims(2) ) /= 0 .OR. & |
|---|
| 184 | MOD( ny+1, pdims(1) ) /= 0 ) CYCLE yn |
|---|
| 185 | nyanz = ( ny + 1 ) / pdims(2) |
|---|
| 186 | |
|---|
| 187 | grid_ratio = ABS( REAL( nxanz ) / REAL( nyanz ) - 1.0 ) |
|---|
| 188 | |
|---|
| 189 | zn: DO nz = nz_min, nz_max |
|---|
| 190 | ! |
|---|
| 191 | !-- Eventually exit in case of non cubic domains |
|---|
| 192 | IF ( cubic_domain .AND. nz /= nx ) CYCLE zn |
|---|
| 193 | ! |
|---|
| 194 | !-- Proof, if grid points in z-direction can be distributed |
|---|
| 195 | !-- without rest to the processors in x-direction |
|---|
| 196 | IF ( MOD( nz, pdims(1) ) /= 0 .AND. .NOT. one_d_decomp ) & |
|---|
| 197 | THEN |
|---|
| 198 | CYCLE zn |
|---|
| 199 | ENDIF |
|---|
| 200 | |
|---|
| 201 | ! |
|---|
| 202 | !-- Store configuration found |
|---|
| 203 | IF ( grid_ratio < maximum_grid_ratio ) THEN |
|---|
| 204 | found = .TRUE. |
|---|
| 205 | count = count + 1 |
|---|
| 206 | config(count)%grid_ratio = grid_ratio |
|---|
| 207 | config(count)%numprocs = numprocs |
|---|
| 208 | config(count)%pdims_1 = pdims(1) |
|---|
| 209 | config(count)%pdims_2 = pdims(2) |
|---|
| 210 | config(count)%nx = nx |
|---|
| 211 | config(count)%ny = ny |
|---|
| 212 | config(count)%nz = nz |
|---|
| 213 | config(count)%nxanz = nxanz |
|---|
| 214 | config(count)%nyanz = nyanz |
|---|
| 215 | IF ( count == 10000 ) THEN |
|---|
| 216 | PRINT*, '+++ more than 10000 configurations' |
|---|
| 217 | EXIT g |
|---|
| 218 | ENDIF |
|---|
| 219 | ENDIF |
|---|
| 220 | |
|---|
| 221 | IF ( one_d_decomp ) CYCLE yn |
|---|
| 222 | |
|---|
| 223 | ENDDO zn |
|---|
| 224 | |
|---|
| 225 | ENDDO yn |
|---|
| 226 | |
|---|
| 227 | ENDDO xn |
|---|
| 228 | |
|---|
| 229 | ENDDO p |
|---|
| 230 | |
|---|
| 231 | ENDDO g |
|---|
| 232 | |
|---|
| 233 | IF ( .NOT. found ) THEN |
|---|
| 234 | PRINT*, ' ' |
|---|
| 235 | PRINT*, '+++ No valid processor grid found for the given number of' |
|---|
| 236 | PRINT*, ' processors and gridpoints' |
|---|
| 237 | STOP |
|---|
| 238 | ENDIF |
|---|
| 239 | |
|---|
| 240 | ! |
|---|
| 241 | !-- Calculate number of possible grid levels and gridpoints of the coarsest grid |
|---|
| 242 | !-- used by the multigrid method |
|---|
| 243 | DO n = 1, count |
|---|
| 244 | mg_levels_x = 1 |
|---|
| 245 | mg_levels_y = 1 |
|---|
| 246 | mg_levels_z = 1 |
|---|
| 247 | |
|---|
| 248 | i = config(n)%nxanz |
|---|
| 249 | DO WHILE ( MOD( i, 2 ) == 0 .AND. i /= 2 ) |
|---|
| 250 | i = i / 2 |
|---|
| 251 | mg_levels_x = mg_levels_x + 1 |
|---|
| 252 | ENDDO |
|---|
| 253 | |
|---|
| 254 | j = config(n)%nyanz |
|---|
| 255 | DO WHILE ( MOD( j, 2 ) == 0 .AND. j /= 2 ) |
|---|
| 256 | j = j / 2 |
|---|
| 257 | mg_levels_y = mg_levels_y + 1 |
|---|
| 258 | ENDDO |
|---|
| 259 | |
|---|
| 260 | k = config(n)%nz |
|---|
| 261 | DO WHILE ( MOD( k, 2 ) == 0 .AND. k /= 2 ) |
|---|
| 262 | k = k / 2 |
|---|
| 263 | mg_levels_z = mg_levels_z + 1 |
|---|
| 264 | ENDDO |
|---|
| 265 | |
|---|
| 266 | maximum_grid_level = MIN( mg_levels_x, mg_levels_y, mg_levels_z ) |
|---|
| 267 | config(n)%grid_levels = maximum_grid_level |
|---|
| 268 | config(n)%nx_mg = config(n)%nxanz / 2**(maximum_grid_level-1) |
|---|
| 269 | config(n)%ny_mg = config(n)%nyanz / 2**(maximum_grid_level-1) |
|---|
| 270 | config(n)%nz_mg = config(n)%nz / 2**(maximum_grid_level-1) |
|---|
| 271 | ENDDO |
|---|
| 272 | |
|---|
| 273 | ! |
|---|
| 274 | !-- Print the configurations computed above |
|---|
| 275 | PRINT*, ' ' |
|---|
| 276 | PRINT*, ' ' |
|---|
| 277 | PRINT*, '*** print out results in ascending grid-ratio order (y/n)?' |
|---|
| 278 | READ (*,*) char |
|---|
| 279 | IF ( char == 'y' ) THEN |
|---|
| 280 | gridratio = 10000.0 |
|---|
| 281 | gridratio(1:count) = config(1:count)%grid_ratio |
|---|
| 282 | WRITE ( *, * ) ' ' |
|---|
| 283 | WRITE ( *, * ) 'Possible configurations found:' |
|---|
| 284 | WRITE ( *, * ) 'sorted in ascending grid-ratio order' |
|---|
| 285 | WRITE ( *, 100 ) |
|---|
| 286 | DO |
|---|
| 287 | ii = MINLOC( gridratio ) |
|---|
| 288 | i = ii(1) |
|---|
| 289 | IF ( gridratio(i) /= 10000.0 ) THEN |
|---|
| 290 | WRITE ( *, 101 ) & |
|---|
| 291 | config(i)%grid_ratio, config(i)%numprocs, config(i)%pdims_1, & |
|---|
| 292 | config(i)%pdims_2, config(i)%nx, config(i)%ny, config(i)%nz, & |
|---|
| 293 | config(i)%nxanz, config(i)%nyanz, config(i)%grid_levels, & |
|---|
| 294 | config(i)%nx_mg, config(i)%ny_mg, config(i)%nz_mg |
|---|
| 295 | gridratio(i) = 10000.0 |
|---|
| 296 | ELSE |
|---|
| 297 | EXIT |
|---|
| 298 | ENDIF |
|---|
| 299 | ENDDO |
|---|
| 300 | ENDIF |
|---|
| 301 | |
|---|
| 302 | PRINT*, ' ' |
|---|
| 303 | PRINT*, ' ' |
|---|
| 304 | PRINT*, '*** print out results in descending PE order (y/n)?' |
|---|
| 305 | READ (*,*) char |
|---|
| 306 | IF ( char == 'y' ) THEN |
|---|
| 307 | numpr = 0 |
|---|
| 308 | numpr(1:count) = config(1:count)%numprocs |
|---|
| 309 | WRITE ( *, * ) ' ' |
|---|
| 310 | WRITE ( *, * ) 'Possible configurations found:' |
|---|
| 311 | WRITE ( *, * ) 'sorted after number of PEs' |
|---|
| 312 | WRITE ( *, 100 ) |
|---|
| 313 | DO |
|---|
| 314 | ii = MAXLOC( numpr ) |
|---|
| 315 | i = ii(1) |
|---|
| 316 | IF ( numpr(i) /= 0 ) THEN |
|---|
| 317 | WRITE ( *, 101 ) & |
|---|
| 318 | config(i)%grid_ratio, config(i)%numprocs, config(i)%pdims_1, & |
|---|
| 319 | config(i)%pdims_2, config(i)%nx, config(i)%ny, config(i)%nz, & |
|---|
| 320 | config(i)%nxanz, config(i)%nyanz, config(i)%grid_levels, & |
|---|
| 321 | config(i)%nx_mg, config(i)%ny_mg, config(i)%nz_mg |
|---|
| 322 | numpr(i) = 0 |
|---|
| 323 | ELSE |
|---|
| 324 | EXIT |
|---|
| 325 | ENDIF |
|---|
| 326 | ENDDO |
|---|
| 327 | ENDIF |
|---|
| 328 | |
|---|
| 329 | PRINT*, ' ' |
|---|
| 330 | PRINT*, ' ' |
|---|
| 331 | PRINT*, '*** print out results in descending grid size order (y/n)?' |
|---|
| 332 | READ (*,*) char |
|---|
| 333 | IF ( char == 'y' ) THEN |
|---|
| 334 | numnx = 0 |
|---|
| 335 | DO i = 1, count |
|---|
| 336 | numnx(i) = config(i)%nx * config(i)%ny * config(i)%nz |
|---|
| 337 | ENDDO |
|---|
| 338 | WRITE ( *, * ) ' ' |
|---|
| 339 | WRITE ( *, * ) 'Possible configurations found:' |
|---|
| 340 | WRITE ( *, * ) 'sorted after grid size' |
|---|
| 341 | WRITE ( *, 100 ) |
|---|
| 342 | DO |
|---|
| 343 | ii = MAXLOC( numnx ) |
|---|
| 344 | i = ii(1) |
|---|
| 345 | IF ( numnx(i) /= 0 ) THEN |
|---|
| 346 | WRITE ( *, 101 ) & |
|---|
| 347 | config(i)%grid_ratio, config(i)%numprocs, config(i)%pdims_1, & |
|---|
| 348 | config(i)%pdims_2, config(i)%nx, config(i)%ny, config(i)%nz, & |
|---|
| 349 | config(i)%nxanz, config(i)%nyanz, config(i)%grid_levels, & |
|---|
| 350 | config(i)%nx_mg, config(i)%ny_mg, config(i)%nz_mg |
|---|
| 351 | numnx(i) = 0 |
|---|
| 352 | ELSE |
|---|
| 353 | EXIT |
|---|
| 354 | ENDIF |
|---|
| 355 | ENDDO |
|---|
| 356 | ENDIF |
|---|
| 357 | |
|---|
| 358 | 100 FORMAT('ratio PEs PE-grid nx ny nz subdomain grid_levels ', & |
|---|
| 359 | 'coarsest subd.') |
|---|
| 360 | 101 FORMAT(F4.2,2X,I4,' (',I4,',',I4,')',2X,I4,1X,I4,1X,I4,' (',I4,',',I4,')', & |
|---|
| 361 | 5X,I2,7X,'(',I3,',',I3,',',I3,')') |
|---|
| 362 | |
|---|
| 363 | END PROGRAM find_palm_config |
|---|
