1 static char help[] = "Partition a mesh in parallel, perhaps with overlap\n\n"; 2 3 #include <petscdmplex.h> 4 #include <petscsf.h> 5 6 /* Sample usage: 7 8 Load a file in serial and distribute it on 24 processes: 9 10 make -f ./gmakefile test globsearch="dm_impls_plex_tests-ex12_0" EXTRA_OPTIONS="-filename $PETSC_DIR/share/petsc/datafiles/meshes/squaremotor-30.exo -orig_dm_view -dm_view" NP=24 11 12 Load a file in serial and distribute it on 24 processes using a custom partitioner: 13 14 make -f ./gmakefile test globsearch="dm_impls_plex_tests-ex12_0" EXTRA_OPTIONS="-filename $PETSC_DIR/share/petsc/datafiles/meshes/cylinder.med -petscpartitioner_type simple -orig_dm_view -dm_view" NP=24 15 16 Load a file in serial, distribute it, and then redistribute it on 24 processes using two different partitioners: 17 18 make -f ./gmakefile test globsearch="dm_impls_plex_tests-ex12_0" EXTRA_OPTIONS="-filename $PETSC_DIR/share/petsc/datafiles/meshes/squaremotor-30.exo -petscpartitioner_type simple -load_balance -lb_petscpartitioner_type parmetis -orig_dm_view -dm_view" NP=24 19 20 Load a file in serial, distribute it randomly, refine it in parallel, and then redistribute it on 24 processes using two different partitioners, and view to VTK: 21 22 make -f ./gmakefile test globsearch="dm_impls_plex_tests-ex12_0" EXTRA_OPTIONS="-filename $PETSC_DIR/share/petsc/datafiles/meshes/squaremotor-30.exo -petscpartitioner_type shell -petscpartitioner_shell_random -dm_refine 1 -load_balance -lb_petscpartitioner_type parmetis -prelb_dm_view vtk:$PWD/prelb.vtk -dm_view vtk:$PWD/balance.vtk -dm_partition_view" NP=24 23 24 */ 25 26 enum {STAGE_LOAD, STAGE_DISTRIBUTE, STAGE_REFINE, STAGE_REDISTRIBUTE}; 27 28 typedef struct { 29 /* Domain and mesh definition */ 30 PetscInt overlap; /* The cell overlap to use during partitioning */ 31 PetscBool testPartition; /* Use a fixed partitioning for testing */ 32 PetscBool testRedundant; /* Use a redundant partitioning for testing */ 33 PetscBool loadBalance; /* Load balance via a second distribute step */ 34 PetscBool partitionBalance; /* Balance shared point partition */ 35 PetscLogStage stages[4]; 36 } AppCtx; 37 38 PetscErrorCode ProcessOptions(MPI_Comm comm, AppCtx *options) 39 { 40 PetscErrorCode ierr; 41 42 PetscFunctionBegin; 43 options->overlap = 0; 44 options->testPartition = PETSC_FALSE; 45 options->testRedundant = PETSC_FALSE; 46 options->loadBalance = PETSC_FALSE; 47 options->partitionBalance = PETSC_FALSE; 48 49 ierr = PetscOptionsBegin(comm, "", "Meshing Problem Options", "DMPLEX");CHKERRQ(ierr); 50 ierr = PetscOptionsBoundedInt("-overlap", "The cell overlap for partitioning", "ex12.c", options->overlap, &options->overlap, NULL,0);CHKERRQ(ierr); 51 ierr = PetscOptionsBool("-test_partition", "Use a fixed partition for testing", "ex12.c", options->testPartition, &options->testPartition, NULL);CHKERRQ(ierr); 52 ierr = PetscOptionsBool("-test_redundant", "Use a redundant partition for testing", "ex12.c", options->testRedundant, &options->testRedundant, NULL);CHKERRQ(ierr); 53 ierr = PetscOptionsBool("-load_balance", "Perform parallel load balancing in a second distribution step", "ex12.c", options->loadBalance, &options->loadBalance, NULL);CHKERRQ(ierr); 54 ierr = PetscOptionsBool("-partition_balance", "Balance the ownership of shared points", "ex12.c", options->partitionBalance, &options->partitionBalance, NULL);CHKERRQ(ierr); 55 ierr = PetscOptionsEnd(); 56 57 ierr = PetscLogStageRegister("MeshLoad", &options->stages[STAGE_LOAD]);CHKERRQ(ierr); 58 ierr = PetscLogStageRegister("MeshDistribute", &options->stages[STAGE_DISTRIBUTE]);CHKERRQ(ierr); 59 ierr = PetscLogStageRegister("MeshRefine", &options->stages[STAGE_REFINE]);CHKERRQ(ierr); 60 ierr = PetscLogStageRegister("MeshRedistribute", &options->stages[STAGE_REDISTRIBUTE]);CHKERRQ(ierr); 61 PetscFunctionReturn(0); 62 } 63 64 PetscErrorCode CreateMesh(MPI_Comm comm, AppCtx *user, DM *dm) 65 { 66 DM pdm = NULL; 67 PetscInt triSizes_n2[2] = {4, 4}; 68 PetscInt triPoints_n2[8] = {0, 1, 4, 6, 2, 3, 5, 7}; 69 PetscInt triSizes_n3[3] = {3, 2, 3}; 70 PetscInt triPoints_n3[8] = {3, 5, 6, 1, 7, 0, 2, 4}; 71 PetscInt triSizes_n4[4] = {2, 2, 2, 2}; 72 PetscInt triPoints_n4[8] = {0, 7, 1, 5, 2, 3, 4, 6}; 73 PetscInt triSizes_n8[8] = {1, 1, 1, 1, 1, 1, 1, 1}; 74 PetscInt triPoints_n8[8] = {0, 1, 2, 3, 4, 5, 6, 7}; 75 PetscInt quadSizes[2] = {2, 2}; 76 PetscInt quadPoints[4] = {2, 3, 0, 1}; 77 PetscInt overlap = user->overlap >= 0 ? user->overlap : 0; 78 PetscInt dim; 79 PetscBool simplex; 80 PetscMPIInt rank, size; 81 PetscErrorCode ierr; 82 83 PetscFunctionBegin; 84 ierr = MPI_Comm_rank(comm, &rank);CHKERRMPI(ierr); 85 ierr = MPI_Comm_size(comm, &size);CHKERRMPI(ierr); 86 ierr = PetscLogStagePush(user->stages[STAGE_LOAD]);CHKERRQ(ierr); 87 ierr = DMCreate(comm, dm);CHKERRQ(ierr); 88 ierr = DMSetType(*dm, DMPLEX);CHKERRQ(ierr); 89 ierr = DMSetFromOptions(*dm);CHKERRQ(ierr); 90 ierr = DMViewFromOptions(*dm, NULL, "-orig_dm_view");CHKERRQ(ierr); 91 ierr = PetscLogStagePop();CHKERRQ(ierr); 92 ierr = DMGetDimension(*dm, &dim);CHKERRQ(ierr); 93 ierr = DMPlexIsSimplex(*dm, &simplex);CHKERRQ(ierr); 94 ierr = PetscLogStagePush(user->stages[STAGE_DISTRIBUTE]);CHKERRQ(ierr); 95 if (!user->testRedundant) { 96 PetscPartitioner part; 97 98 ierr = DMPlexGetPartitioner(*dm, &part);CHKERRQ(ierr); 99 ierr = PetscPartitionerSetFromOptions(part);CHKERRQ(ierr); 100 ierr = DMPlexSetPartitionBalance(*dm, user->partitionBalance);CHKERRQ(ierr); 101 if (user->testPartition) { 102 const PetscInt *sizes = NULL; 103 const PetscInt *points = NULL; 104 105 if (!rank) { 106 if (dim == 2 && simplex && size == 2) { 107 sizes = triSizes_n2; points = triPoints_n2; 108 } else if (dim == 2 && simplex && size == 3) { 109 sizes = triSizes_n3; points = triPoints_n3; 110 } else if (dim == 2 && simplex && size == 4) { 111 sizes = triSizes_n4; points = triPoints_n4; 112 } else if (dim == 2 && simplex && size == 8) { 113 sizes = triSizes_n8; points = triPoints_n8; 114 } else if (dim == 2 && !simplex && size == 2) { 115 sizes = quadSizes; points = quadPoints; 116 } 117 } 118 ierr = PetscPartitionerSetType(part, PETSCPARTITIONERSHELL);CHKERRQ(ierr); 119 ierr = PetscPartitionerShellSetPartition(part, size, sizes, points);CHKERRQ(ierr); 120 } 121 ierr = DMPlexDistribute(*dm, overlap, NULL, &pdm);CHKERRQ(ierr); 122 } else { 123 PetscSF sf; 124 125 ierr = DMPlexGetRedundantDM(*dm, &sf, &pdm);CHKERRQ(ierr); 126 if (sf) { 127 DM test; 128 129 ierr = DMPlexCreate(comm,&test);CHKERRQ(ierr); 130 ierr = PetscObjectSetName((PetscObject)test, "Test SF-migrated Redundant Mesh");CHKERRQ(ierr); 131 ierr = DMPlexMigrate(*dm, sf, test);CHKERRQ(ierr); 132 ierr = DMViewFromOptions(test, NULL, "-redundant_migrated_dm_view");CHKERRQ(ierr); 133 ierr = DMDestroy(&test);CHKERRQ(ierr); 134 } 135 ierr = PetscSFDestroy(&sf);CHKERRQ(ierr); 136 } 137 if (pdm) { 138 ierr = DMDestroy(dm);CHKERRQ(ierr); 139 *dm = pdm; 140 } 141 ierr = PetscLogStagePop();CHKERRQ(ierr); 142 ierr = DMSetFromOptions(*dm);CHKERRQ(ierr); 143 if (user->loadBalance) { 144 PetscPartitioner part; 145 146 ierr = DMViewFromOptions(*dm, NULL, "-prelb_dm_view");CHKERRQ(ierr); 147 ierr = DMPlexSetOptionsPrefix(*dm, "lb_");CHKERRQ(ierr); 148 ierr = PetscLogStagePush(user->stages[STAGE_REDISTRIBUTE]);CHKERRQ(ierr); 149 ierr = DMPlexGetPartitioner(*dm, &part);CHKERRQ(ierr); 150 ierr = PetscObjectSetOptionsPrefix((PetscObject) part, "lb_");CHKERRQ(ierr); 151 ierr = PetscPartitionerSetFromOptions(part);CHKERRQ(ierr); 152 if (user->testPartition) { 153 PetscInt reSizes_n2[2] = {2, 2}; 154 PetscInt rePoints_n2[4] = {2, 3, 0, 1}; 155 if (rank) {rePoints_n2[0] = 1; rePoints_n2[1] = 2, rePoints_n2[2] = 0, rePoints_n2[3] = 3;} 156 157 ierr = PetscPartitionerSetType(part, PETSCPARTITIONERSHELL);CHKERRQ(ierr); 158 ierr = PetscPartitionerShellSetPartition(part, size, reSizes_n2, rePoints_n2);CHKERRQ(ierr); 159 } 160 ierr = DMPlexSetPartitionBalance(*dm, user->partitionBalance);CHKERRQ(ierr); 161 ierr = DMPlexDistribute(*dm, overlap, NULL, &pdm);CHKERRQ(ierr); 162 if (pdm) { 163 ierr = DMDestroy(dm);CHKERRQ(ierr); 164 *dm = pdm; 165 } 166 ierr = PetscLogStagePop();CHKERRQ(ierr); 167 } 168 ierr = PetscLogStagePush(user->stages[STAGE_REFINE]);CHKERRQ(ierr); 169 ierr = DMViewFromOptions(*dm, NULL, "-dm_view");CHKERRQ(ierr); 170 ierr = PetscLogStagePop();CHKERRQ(ierr); 171 PetscFunctionReturn(0); 172 } 173 174 int main(int argc, char **argv) 175 { 176 DM dm; 177 AppCtx user; /* user-defined work context */ 178 PetscErrorCode ierr; 179 180 ierr = PetscInitialize(&argc, &argv, NULL, help);if (ierr) return ierr; 181 ierr = ProcessOptions(PETSC_COMM_WORLD, &user);CHKERRQ(ierr); 182 ierr = CreateMesh(PETSC_COMM_WORLD, &user, &dm);CHKERRQ(ierr); 183 ierr = DMDestroy(&dm);CHKERRQ(ierr); 184 ierr = PetscFinalize(); 185 return ierr; 186 } 187 188 /*TEST 189 # Parallel, no overlap tests 0-2 190 test: 191 suffix: 0 192 requires: triangle 193 args: -dm_coord_space 0 -dm_view ascii:mesh.tex:ascii_latex 194 test: 195 suffix: 1 196 requires: triangle 197 nsize: 3 198 args: -dm_coord_space 0 -test_partition -dm_view ascii::ascii_info_detail 199 test: 200 suffix: 2 201 requires: triangle 202 nsize: 8 203 args: -dm_coord_space 0 -test_partition -dm_view ascii::ascii_info_detail 204 # Parallel, level-1 overlap tests 3-4 205 test: 206 suffix: 3 207 requires: triangle 208 nsize: 3 209 args: -dm_coord_space 0 -test_partition -overlap 1 -dm_view ascii::ascii_info_detail 210 test: 211 suffix: 4 212 requires: triangle 213 nsize: 8 214 args: -dm_coord_space 0 -test_partition -overlap 1 -dm_view ascii::ascii_info_detail 215 # Parallel, level-2 overlap test 5 216 test: 217 suffix: 5 218 requires: triangle 219 nsize: 8 220 args: -dm_coord_space 0 -test_partition -overlap 2 -dm_view ascii::ascii_info_detail 221 # Parallel load balancing, test 6-7 222 test: 223 suffix: 6 224 requires: triangle 225 nsize: 2 226 args: -dm_coord_space 0 -test_partition -overlap 1 -dm_view ascii::ascii_info_detail 227 test: 228 suffix: 7 229 requires: triangle 230 nsize: 2 231 args: -dm_coord_space 0 -test_partition -overlap 1 -load_balance -dm_view ascii::ascii_info_detail 232 # Parallel redundant copying, test 8 233 test: 234 suffix: 8 235 requires: triangle 236 nsize: 2 237 args: -dm_coord_space 0 -test_redundant -redundant_migrated_dm_view ascii::ascii_info_detail -dm_view ascii::ascii_info_detail 238 test: 239 suffix: lb_0 240 requires: parmetis 241 nsize: 4 242 args: -dm_coord_space 0 -dm_plex_simplex 0 -dm_plex_box_faces 4,4 -petscpartitioner_type shell -petscpartitioner_shell_random -lb_petscpartitioner_type parmetis -load_balance -lb_petscpartitioner_view -prelb_dm_view ::load_balance -dm_view ::load_balance 243 244 # Same tests as above, but with balancing of the shared point partition 245 test: 246 suffix: 9 247 requires: triangle 248 args: -dm_coord_space 0 -dm_view ascii:mesh.tex:ascii_latex -partition_balance 249 test: 250 suffix: 10 251 requires: triangle 252 nsize: 3 253 args: -dm_coord_space 0 -test_partition -dm_view ascii::ascii_info_detail -partition_balance 254 test: 255 suffix: 11 256 requires: triangle 257 nsize: 8 258 args: -dm_coord_space 0 -test_partition -dm_view ascii::ascii_info_detail -partition_balance 259 # Parallel, level-1 overlap tests 3-4 260 test: 261 suffix: 12 262 requires: triangle 263 nsize: 3 264 args: -dm_coord_space 0 -test_partition -overlap 1 -dm_view ascii::ascii_info_detail -partition_balance 265 test: 266 suffix: 13 267 requires: triangle 268 nsize: 8 269 args: -dm_coord_space 0 -test_partition -overlap 1 -dm_view ascii::ascii_info_detail -partition_balance 270 # Parallel, level-2 overlap test 5 271 test: 272 suffix: 14 273 requires: triangle 274 nsize: 8 275 args: -dm_coord_space 0 -test_partition -overlap 2 -dm_view ascii::ascii_info_detail -partition_balance 276 # Parallel load balancing, test 6-7 277 test: 278 suffix: 15 279 requires: triangle 280 nsize: 2 281 args: -dm_coord_space 0 -test_partition -overlap 1 -dm_view ascii::ascii_info_detail -partition_balance 282 test: 283 suffix: 16 284 requires: triangle 285 nsize: 2 286 args: -dm_coord_space 0 -test_partition -overlap 1 -load_balance -dm_view ascii::ascii_info_detail -partition_balance 287 # Parallel redundant copying, test 8 288 test: 289 suffix: 17 290 requires: triangle 291 nsize: 2 292 args: -dm_coord_space 0 -test_redundant -dm_view ascii::ascii_info_detail -partition_balance 293 test: 294 suffix: lb_1 295 requires: parmetis 296 nsize: 4 297 args: -dm_coord_space 0 -dm_plex_simplex 0 -dm_plex_box_faces 4,4 -petscpartitioner_type shell -petscpartitioner_shell_random -lb_petscpartitioner_type parmetis -load_balance -lb_petscpartitioner_view -partition_balance -prelb_dm_view ::load_balance -dm_view ::load_balance 298 TEST*/ 299