1 #include <petsc/private/dmpleximpl.h> /*I "petscdmplex.h" I*/ 2 #include <petsc/private/dmlabelimpl.h> /*I "petscdmlabel.h" I*/ 3 4 /*@C 5 DMPlexSetAdjacencyUser - Define adjacency in the mesh using a user-provided callback 6 7 Input Parameters: 8 + dm - The DM object 9 . user - The user callback, may be NULL (to clear the callback) 10 - ctx - context for callback evaluation, may be NULL 11 12 Level: advanced 13 14 Notes: 15 The caller of DMPlexGetAdjacency may need to arrange that a large enough array is available for the adjacency. 16 17 Any setting here overrides other configuration of DMPlex adjacency determination. 18 19 .seealso: DMPlexSetAdjacencyUseCone(), DMPlexSetAdjacencyUseClosure(), DMPlexDistribute(), DMPlexPreallocateOperator(), DMPlexGetAdjacency(), DMPlexGetAdjacencyUser() 20 @*/ 21 PetscErrorCode DMPlexSetAdjacencyUser(DM dm,PetscErrorCode (*user)(DM,PetscInt,PetscInt*,PetscInt[],void*),void *ctx) 22 { 23 DM_Plex *mesh = (DM_Plex *)dm->data; 24 25 PetscFunctionBegin; 26 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 27 mesh->useradjacency = user; 28 mesh->useradjacencyctx = ctx; 29 PetscFunctionReturn(0); 30 } 31 32 /*@C 33 DMPlexGetAdjacencyUser - get the user-defined adjacency callback 34 35 Input Parameter: 36 . dm - The DM object 37 38 Output Parameters: 39 - user - The user callback 40 - ctx - context for callback evaluation 41 42 Level: advanced 43 44 .seealso: DMPlexSetAdjacencyUseCone(), DMPlexSetAdjacencyUseClosure(), DMPlexDistribute(), DMPlexPreallocateOperator(), DMPlexGetAdjacency(), DMPlexSetAdjacencyUser() 45 @*/ 46 PetscErrorCode DMPlexGetAdjacencyUser(DM dm, PetscErrorCode (**user)(DM,PetscInt,PetscInt*,PetscInt[],void*), void **ctx) 47 { 48 DM_Plex *mesh = (DM_Plex *)dm->data; 49 50 PetscFunctionBegin; 51 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 52 if (user) *user = mesh->useradjacency; 53 if (ctx) *ctx = mesh->useradjacencyctx; 54 PetscFunctionReturn(0); 55 } 56 57 /*@ 58 DMPlexSetAdjacencyUseCone - Define adjacency in the mesh using either the cone or the support first 59 60 Input Parameters: 61 + dm - The DM object 62 - useCone - Flag to use the cone first 63 64 Level: intermediate 65 66 Notes: 67 $ FEM: Two points p and q are adjacent if q \in closure(star(p)), useCone = PETSC_FALSE, useClosure = PETSC_TRUE 68 $ FVM: Two points p and q are adjacent if q \in support(p+cone(p)), useCone = PETSC_TRUE, useClosure = PETSC_FALSE 69 $ FVM++: Two points p and q are adjacent if q \in star(closure(p)), useCone = PETSC_TRUE, useClosure = PETSC_TRUE 70 71 .seealso: DMPlexGetAdjacencyUseCone(), DMPlexSetAdjacencyUseClosure(), DMPlexGetAdjacencyUseClosure(), DMPlexDistribute(), DMPlexPreallocateOperator() 72 @*/ 73 PetscErrorCode DMPlexSetAdjacencyUseCone(DM dm, PetscBool useCone) 74 { 75 PetscDS prob; 76 PetscBool useClosure; 77 PetscInt Nf; 78 PetscErrorCode ierr; 79 80 PetscFunctionBegin; 81 ierr = DMGetDS(dm, &prob);CHKERRQ(ierr); 82 ierr = PetscDSGetNumFields(prob, &Nf);CHKERRQ(ierr); 83 if (!Nf) { 84 ierr = PetscDSGetAdjacency(prob, PETSC_DEFAULT, NULL, &useClosure);CHKERRQ(ierr); 85 ierr = PetscDSSetAdjacency(prob, PETSC_DEFAULT, useCone, useClosure);CHKERRQ(ierr); 86 } else { 87 ierr = PetscDSGetAdjacency(prob, 0, NULL, &useClosure);CHKERRQ(ierr); 88 ierr = PetscDSSetAdjacency(prob, 0, useCone, useClosure);CHKERRQ(ierr); 89 } 90 PetscFunctionReturn(0); 91 } 92 93 /*@ 94 DMPlexGetAdjacencyUseCone - Query whether adjacency in the mesh uses the cone or the support first 95 96 Input Parameter: 97 . dm - The DM object 98 99 Output Parameter: 100 . useCone - Flag to use the cone first 101 102 Level: intermediate 103 104 Notes: 105 $ FEM: Two points p and q are adjacent if q \in closure(star(p)), useCone = PETSC_FALSE, useClosure = PETSC_TRUE 106 $ FVM: Two points p and q are adjacent if q \in support(p+cone(p)), useCone = PETSC_TRUE, useClosure = PETSC_FALSE 107 $ FVM++: Two points p and q are adjacent if q \in star(closure(p)), useCone = PETSC_TRUE, useClosure = PETSC_TRUE 108 109 .seealso: DMPlexSetAdjacencyUseCone(), DMPlexSetAdjacencyUseClosure(), DMPlexGetAdjacencyUseClosure(), DMPlexDistribute(), DMPlexPreallocateOperator() 110 @*/ 111 PetscErrorCode DMPlexGetAdjacencyUseCone(DM dm, PetscBool *useCone) 112 { 113 PetscDS prob; 114 PetscInt Nf; 115 PetscErrorCode ierr; 116 117 PetscFunctionBegin; 118 ierr = DMGetDS(dm, &prob);CHKERRQ(ierr); 119 ierr = PetscDSGetNumFields(prob, &Nf);CHKERRQ(ierr); 120 if (!Nf) { 121 ierr = PetscDSGetAdjacency(prob, PETSC_DEFAULT, useCone, NULL);CHKERRQ(ierr); 122 } else { 123 ierr = PetscDSGetAdjacency(prob, 0, useCone, NULL);CHKERRQ(ierr); 124 } 125 PetscFunctionReturn(0); 126 } 127 128 /*@ 129 DMPlexSetAdjacencyUseClosure - Define adjacency in the mesh using the transitive closure 130 131 Input Parameters: 132 + dm - The DM object 133 - useClosure - Flag to use the closure 134 135 Level: intermediate 136 137 Notes: 138 $ FEM: Two points p and q are adjacent if q \in closure(star(p)), useCone = PETSC_FALSE, useClosure = PETSC_TRUE 139 $ FVM: Two points p and q are adjacent if q \in support(p+cone(p)), useCone = PETSC_TRUE, useClosure = PETSC_FALSE 140 $ FVM++: Two points p and q are adjacent if q \in star(closure(p)), useCone = PETSC_TRUE, useClosure = PETSC_TRUE 141 142 .seealso: DMPlexGetAdjacencyUseClosure(), DMPlexSetAdjacencyUseCone(), DMPlexGetAdjacencyUseCone(), DMPlexDistribute(), DMPlexPreallocateOperator() 143 @*/ 144 PetscErrorCode DMPlexSetAdjacencyUseClosure(DM dm, PetscBool useClosure) 145 { 146 PetscDS prob; 147 PetscBool useCone; 148 PetscInt Nf; 149 PetscErrorCode ierr; 150 151 PetscFunctionBegin; 152 ierr = DMGetDS(dm, &prob);CHKERRQ(ierr); 153 ierr = PetscDSGetNumFields(prob, &Nf);CHKERRQ(ierr); 154 if (!Nf) { 155 ierr = PetscDSGetAdjacency(prob, PETSC_DEFAULT, &useCone, NULL);CHKERRQ(ierr); 156 ierr = PetscDSSetAdjacency(prob, PETSC_DEFAULT, useCone, useClosure);CHKERRQ(ierr); 157 } else { 158 ierr = PetscDSGetAdjacency(prob, 0, &useCone, NULL);CHKERRQ(ierr); 159 ierr = PetscDSSetAdjacency(prob, 0, useCone, useClosure);CHKERRQ(ierr); 160 } 161 PetscFunctionReturn(0); 162 } 163 164 /*@ 165 DMPlexGetAdjacencyUseClosure - Query whether adjacency in the mesh uses the transitive closure 166 167 Input Parameter: 168 . dm - The DM object 169 170 Output Parameter: 171 . useClosure - Flag to use the closure 172 173 Level: intermediate 174 175 Notes: 176 $ FEM: Two points p and q are adjacent if q \in closure(star(p)), useCone = PETSC_FALSE, useClosure = PETSC_TRUE 177 $ FVM: Two points p and q are adjacent if q \in support(p+cone(p)), useCone = PETSC_TRUE, useClosure = PETSC_FALSE 178 $ FVM++: Two points p and q are adjacent if q \in star(closure(p)), useCone = PETSC_TRUE, useClosure = PETSC_TRUE 179 180 .seealso: DMPlexSetAdjacencyUseClosure(), DMPlexSetAdjacencyUseCone(), DMPlexGetAdjacencyUseCone(), DMPlexDistribute(), DMPlexPreallocateOperator() 181 @*/ 182 PetscErrorCode DMPlexGetAdjacencyUseClosure(DM dm, PetscBool *useClosure) 183 { 184 PetscDS prob; 185 PetscInt Nf; 186 PetscErrorCode ierr; 187 188 PetscFunctionBegin; 189 ierr = DMGetDS(dm, &prob);CHKERRQ(ierr); 190 ierr = PetscDSGetNumFields(prob, &Nf);CHKERRQ(ierr); 191 if (!Nf) { 192 ierr = PetscDSGetAdjacency(prob, PETSC_DEFAULT, NULL, useClosure);CHKERRQ(ierr); 193 } else { 194 ierr = PetscDSGetAdjacency(prob, 0, NULL, useClosure);CHKERRQ(ierr); 195 } 196 PetscFunctionReturn(0); 197 } 198 199 /*@ 200 DMPlexSetAdjacencyUseAnchors - Define adjacency in the mesh using the point-to-point constraints. 201 202 Input Parameters: 203 + dm - The DM object 204 - useAnchors - Flag to use the constraints. If PETSC_TRUE, then constrained points are omitted from DMPlexGetAdjacency(), and their anchor points appear in their place. 205 206 Level: intermediate 207 208 .seealso: DMPlexGetAdjacencyUseClosure(), DMPlexSetAdjacencyUseCone(), DMPlexGetAdjacencyUseCone(), DMPlexDistribute(), DMPlexPreallocateOperator(), DMPlexSetAnchors() 209 @*/ 210 PetscErrorCode DMPlexSetAdjacencyUseAnchors(DM dm, PetscBool useAnchors) 211 { 212 DM_Plex *mesh = (DM_Plex *) dm->data; 213 214 PetscFunctionBegin; 215 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 216 mesh->useAnchors = useAnchors; 217 PetscFunctionReturn(0); 218 } 219 220 /*@ 221 DMPlexGetAdjacencyUseAnchors - Query whether adjacency in the mesh uses the point-to-point constraints. 222 223 Input Parameter: 224 . dm - The DM object 225 226 Output Parameter: 227 . useAnchors - Flag to use the closure. If PETSC_TRUE, then constrained points are omitted from DMPlexGetAdjacency(), and their anchor points appear in their place. 228 229 Level: intermediate 230 231 .seealso: DMPlexSetAdjacencyUseAnchors(), DMPlexSetAdjacencyUseCone(), DMPlexGetAdjacencyUseCone(), DMPlexDistribute(), DMPlexPreallocateOperator(), DMPlexSetAnchors() 232 @*/ 233 PetscErrorCode DMPlexGetAdjacencyUseAnchors(DM dm, PetscBool *useAnchors) 234 { 235 DM_Plex *mesh = (DM_Plex *) dm->data; 236 237 PetscFunctionBegin; 238 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 239 PetscValidIntPointer(useAnchors, 2); 240 *useAnchors = mesh->useAnchors; 241 PetscFunctionReturn(0); 242 } 243 244 static PetscErrorCode DMPlexGetAdjacency_Cone_Internal(DM dm, PetscInt p, PetscInt *adjSize, PetscInt adj[]) 245 { 246 const PetscInt *cone = NULL; 247 PetscInt numAdj = 0, maxAdjSize = *adjSize, coneSize, c; 248 PetscErrorCode ierr; 249 250 PetscFunctionBeginHot; 251 ierr = DMPlexGetConeSize(dm, p, &coneSize);CHKERRQ(ierr); 252 ierr = DMPlexGetCone(dm, p, &cone);CHKERRQ(ierr); 253 for (c = 0; c <= coneSize; ++c) { 254 const PetscInt point = !c ? p : cone[c-1]; 255 const PetscInt *support = NULL; 256 PetscInt supportSize, s, q; 257 258 ierr = DMPlexGetSupportSize(dm, point, &supportSize);CHKERRQ(ierr); 259 ierr = DMPlexGetSupport(dm, point, &support);CHKERRQ(ierr); 260 for (s = 0; s < supportSize; ++s) { 261 for (q = 0; q < numAdj || ((void)(adj[numAdj++] = support[s]),0); ++q) { 262 if (support[s] == adj[q]) break; 263 } 264 if (numAdj > maxAdjSize) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Invalid mesh exceeded adjacency allocation (%D)", maxAdjSize); 265 } 266 } 267 *adjSize = numAdj; 268 PetscFunctionReturn(0); 269 } 270 271 static PetscErrorCode DMPlexGetAdjacency_Support_Internal(DM dm, PetscInt p, PetscInt *adjSize, PetscInt adj[]) 272 { 273 const PetscInt *support = NULL; 274 PetscInt numAdj = 0, maxAdjSize = *adjSize, supportSize, s; 275 PetscErrorCode ierr; 276 277 PetscFunctionBeginHot; 278 ierr = DMPlexGetSupportSize(dm, p, &supportSize);CHKERRQ(ierr); 279 ierr = DMPlexGetSupport(dm, p, &support);CHKERRQ(ierr); 280 for (s = 0; s <= supportSize; ++s) { 281 const PetscInt point = !s ? p : support[s-1]; 282 const PetscInt *cone = NULL; 283 PetscInt coneSize, c, q; 284 285 ierr = DMPlexGetConeSize(dm, point, &coneSize);CHKERRQ(ierr); 286 ierr = DMPlexGetCone(dm, point, &cone);CHKERRQ(ierr); 287 for (c = 0; c < coneSize; ++c) { 288 for (q = 0; q < numAdj || ((void)(adj[numAdj++] = cone[c]),0); ++q) { 289 if (cone[c] == adj[q]) break; 290 } 291 if (numAdj > maxAdjSize) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Invalid mesh exceeded adjacency allocation (%D)", maxAdjSize); 292 } 293 } 294 *adjSize = numAdj; 295 PetscFunctionReturn(0); 296 } 297 298 static PetscErrorCode DMPlexGetAdjacency_Transitive_Internal(DM dm, PetscInt p, PetscBool useClosure, PetscInt *adjSize, PetscInt adj[]) 299 { 300 PetscInt *star = NULL; 301 PetscInt numAdj = 0, maxAdjSize = *adjSize, starSize, s; 302 PetscErrorCode ierr; 303 304 PetscFunctionBeginHot; 305 ierr = DMPlexGetTransitiveClosure(dm, p, useClosure, &starSize, &star);CHKERRQ(ierr); 306 for (s = 0; s < starSize*2; s += 2) { 307 const PetscInt *closure = NULL; 308 PetscInt closureSize, c, q; 309 310 ierr = DMPlexGetTransitiveClosure(dm, star[s], (PetscBool)!useClosure, &closureSize, (PetscInt**) &closure);CHKERRQ(ierr); 311 for (c = 0; c < closureSize*2; c += 2) { 312 for (q = 0; q < numAdj || ((void)(adj[numAdj++] = closure[c]),0); ++q) { 313 if (closure[c] == adj[q]) break; 314 } 315 if (numAdj > maxAdjSize) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Invalid mesh exceeded adjacency allocation (%D)", maxAdjSize); 316 } 317 ierr = DMPlexRestoreTransitiveClosure(dm, star[s], (PetscBool)!useClosure, &closureSize, (PetscInt**) &closure);CHKERRQ(ierr); 318 } 319 ierr = DMPlexRestoreTransitiveClosure(dm, p, useClosure, &starSize, &star);CHKERRQ(ierr); 320 *adjSize = numAdj; 321 PetscFunctionReturn(0); 322 } 323 324 PetscErrorCode DMPlexGetAdjacency_Internal(DM dm, PetscInt p, PetscBool useCone, PetscBool useTransitiveClosure, PetscBool useAnchors, PetscInt *adjSize, PetscInt *adj[]) 325 { 326 static PetscInt asiz = 0; 327 PetscInt maxAnchors = 1; 328 PetscInt aStart = -1, aEnd = -1; 329 PetscInt maxAdjSize; 330 PetscSection aSec = NULL; 331 IS aIS = NULL; 332 const PetscInt *anchors; 333 DM_Plex *mesh = (DM_Plex *)dm->data; 334 PetscErrorCode ierr; 335 336 PetscFunctionBeginHot; 337 if (useAnchors) { 338 ierr = DMPlexGetAnchors(dm,&aSec,&aIS);CHKERRQ(ierr); 339 if (aSec) { 340 ierr = PetscSectionGetMaxDof(aSec,&maxAnchors);CHKERRQ(ierr); 341 maxAnchors = PetscMax(1,maxAnchors); 342 ierr = PetscSectionGetChart(aSec,&aStart,&aEnd);CHKERRQ(ierr); 343 ierr = ISGetIndices(aIS,&anchors);CHKERRQ(ierr); 344 } 345 } 346 if (!*adj) { 347 PetscInt depth, coneSeries, supportSeries, maxC, maxS, pStart, pEnd; 348 349 ierr = DMPlexGetChart(dm, &pStart,&pEnd);CHKERRQ(ierr); 350 ierr = DMPlexGetDepth(dm, &depth);CHKERRQ(ierr); 351 ierr = DMPlexGetMaxSizes(dm, &maxC, &maxS);CHKERRQ(ierr); 352 coneSeries = (maxC > 1) ? ((PetscPowInt(maxC,depth+1)-1)/(maxC-1)) : depth+1; 353 supportSeries = (maxS > 1) ? ((PetscPowInt(maxS,depth+1)-1)/(maxS-1)) : depth+1; 354 asiz = PetscMax(PetscPowInt(maxS,depth)*coneSeries,PetscPowInt(maxC,depth)*supportSeries); 355 asiz *= maxAnchors; 356 asiz = PetscMin(asiz,pEnd-pStart); 357 ierr = PetscMalloc1(asiz,adj);CHKERRQ(ierr); 358 } 359 if (*adjSize < 0) *adjSize = asiz; 360 maxAdjSize = *adjSize; 361 if (mesh->useradjacency) { 362 ierr = mesh->useradjacency(dm, p, adjSize, *adj, mesh->useradjacencyctx);CHKERRQ(ierr); 363 } else if (useTransitiveClosure) { 364 ierr = DMPlexGetAdjacency_Transitive_Internal(dm, p, useCone, adjSize, *adj);CHKERRQ(ierr); 365 } else if (useCone) { 366 ierr = DMPlexGetAdjacency_Cone_Internal(dm, p, adjSize, *adj);CHKERRQ(ierr); 367 } else { 368 ierr = DMPlexGetAdjacency_Support_Internal(dm, p, adjSize, *adj);CHKERRQ(ierr); 369 } 370 if (useAnchors && aSec) { 371 PetscInt origSize = *adjSize; 372 PetscInt numAdj = origSize; 373 PetscInt i = 0, j; 374 PetscInt *orig = *adj; 375 376 while (i < origSize) { 377 PetscInt p = orig[i]; 378 PetscInt aDof = 0; 379 380 if (p >= aStart && p < aEnd) { 381 ierr = PetscSectionGetDof(aSec,p,&aDof);CHKERRQ(ierr); 382 } 383 if (aDof) { 384 PetscInt aOff; 385 PetscInt s, q; 386 387 for (j = i + 1; j < numAdj; j++) { 388 orig[j - 1] = orig[j]; 389 } 390 origSize--; 391 numAdj--; 392 ierr = PetscSectionGetOffset(aSec,p,&aOff);CHKERRQ(ierr); 393 for (s = 0; s < aDof; ++s) { 394 for (q = 0; q < numAdj || ((void)(orig[numAdj++] = anchors[aOff+s]),0); ++q) { 395 if (anchors[aOff+s] == orig[q]) break; 396 } 397 if (numAdj > maxAdjSize) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Invalid mesh exceeded adjacency allocation (%D)", maxAdjSize); 398 } 399 } 400 else { 401 i++; 402 } 403 } 404 *adjSize = numAdj; 405 ierr = ISRestoreIndices(aIS,&anchors);CHKERRQ(ierr); 406 } 407 PetscFunctionReturn(0); 408 } 409 410 /*@ 411 DMPlexGetAdjacency - Return all points adjacent to the given point 412 413 Input Parameters: 414 + dm - The DM object 415 . p - The point 416 . adjSize - The maximum size of adj if it is non-NULL, or PETSC_DETERMINE 417 - adj - Either NULL so that the array is allocated, or an existing array with size adjSize 418 419 Output Parameters: 420 + adjSize - The number of adjacent points 421 - adj - The adjacent points 422 423 Level: advanced 424 425 Notes: 426 The user must PetscFree the adj array if it was not passed in. 427 428 .seealso: DMPlexSetAdjacencyUseCone(), DMPlexSetAdjacencyUseClosure(), DMPlexDistribute(), DMCreateMatrix(), DMPlexPreallocateOperator() 429 @*/ 430 PetscErrorCode DMPlexGetAdjacency(DM dm, PetscInt p, PetscInt *adjSize, PetscInt *adj[]) 431 { 432 PetscBool useCone, useClosure, useAnchors; 433 PetscErrorCode ierr; 434 435 PetscFunctionBeginHot; 436 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 437 PetscValidPointer(adjSize,3); 438 PetscValidPointer(adj,4); 439 ierr = DMPlexGetAdjacencyUseCone(dm, &useCone);CHKERRQ(ierr); 440 ierr = DMPlexGetAdjacencyUseClosure(dm, &useClosure);CHKERRQ(ierr); 441 ierr = DMPlexGetAdjacencyUseAnchors(dm, &useAnchors);CHKERRQ(ierr); 442 ierr = DMPlexGetAdjacency_Internal(dm, p, useCone, useClosure, useAnchors, adjSize, adj);CHKERRQ(ierr); 443 PetscFunctionReturn(0); 444 } 445 446 /*@ 447 DMPlexCreateTwoSidedProcessSF - Create an SF which just has process connectivity 448 449 Collective on DM 450 451 Input Parameters: 452 + dm - The DM 453 - sfPoint - The PetscSF which encodes point connectivity 454 455 Output Parameters: 456 + processRanks - A list of process neighbors, or NULL 457 - sfProcess - An SF encoding the two-sided process connectivity, or NULL 458 459 Level: developer 460 461 .seealso: PetscSFCreate(), DMPlexCreateProcessSF() 462 @*/ 463 PetscErrorCode DMPlexCreateTwoSidedProcessSF(DM dm, PetscSF sfPoint, PetscSection rootRankSection, IS rootRanks, PetscSection leafRankSection, IS leafRanks, IS *processRanks, PetscSF *sfProcess) 464 { 465 const PetscSFNode *remotePoints; 466 PetscInt *localPointsNew; 467 PetscSFNode *remotePointsNew; 468 const PetscInt *nranks; 469 PetscInt *ranksNew; 470 PetscBT neighbors; 471 PetscInt pStart, pEnd, p, numLeaves, l, numNeighbors, n; 472 PetscMPIInt size, proc, rank; 473 PetscErrorCode ierr; 474 475 PetscFunctionBegin; 476 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 477 PetscValidHeaderSpecific(sfPoint, PETSCSF_CLASSID, 2); 478 if (processRanks) {PetscValidPointer(processRanks, 3);} 479 if (sfProcess) {PetscValidPointer(sfProcess, 4);} 480 ierr = MPI_Comm_size(PetscObjectComm((PetscObject) dm), &size);CHKERRQ(ierr); 481 ierr = MPI_Comm_rank(PetscObjectComm((PetscObject) dm), &rank);CHKERRQ(ierr); 482 ierr = PetscSFGetGraph(sfPoint, NULL, &numLeaves, NULL, &remotePoints);CHKERRQ(ierr); 483 ierr = PetscBTCreate(size, &neighbors);CHKERRQ(ierr); 484 ierr = PetscBTMemzero(size, neighbors);CHKERRQ(ierr); 485 /* Compute root-to-leaf process connectivity */ 486 ierr = PetscSectionGetChart(rootRankSection, &pStart, &pEnd);CHKERRQ(ierr); 487 ierr = ISGetIndices(rootRanks, &nranks);CHKERRQ(ierr); 488 for (p = pStart; p < pEnd; ++p) { 489 PetscInt ndof, noff, n; 490 491 ierr = PetscSectionGetDof(rootRankSection, p, &ndof);CHKERRQ(ierr); 492 ierr = PetscSectionGetOffset(rootRankSection, p, &noff);CHKERRQ(ierr); 493 for (n = 0; n < ndof; ++n) {ierr = PetscBTSet(neighbors, nranks[noff+n]);CHKERRQ(ierr);} 494 } 495 ierr = ISRestoreIndices(rootRanks, &nranks);CHKERRQ(ierr); 496 /* Compute leaf-to-neighbor process connectivity */ 497 ierr = PetscSectionGetChart(leafRankSection, &pStart, &pEnd);CHKERRQ(ierr); 498 ierr = ISGetIndices(leafRanks, &nranks);CHKERRQ(ierr); 499 for (p = pStart; p < pEnd; ++p) { 500 PetscInt ndof, noff, n; 501 502 ierr = PetscSectionGetDof(leafRankSection, p, &ndof);CHKERRQ(ierr); 503 ierr = PetscSectionGetOffset(leafRankSection, p, &noff);CHKERRQ(ierr); 504 for (n = 0; n < ndof; ++n) {ierr = PetscBTSet(neighbors, nranks[noff+n]);CHKERRQ(ierr);} 505 } 506 ierr = ISRestoreIndices(leafRanks, &nranks);CHKERRQ(ierr); 507 /* Compute leaf-to-root process connectivity */ 508 for (l = 0; l < numLeaves; ++l) {PetscBTSet(neighbors, remotePoints[l].rank);} 509 /* Calculate edges */ 510 PetscBTClear(neighbors, rank); 511 for(proc = 0, numNeighbors = 0; proc < size; ++proc) {if (PetscBTLookup(neighbors, proc)) ++numNeighbors;} 512 ierr = PetscMalloc1(numNeighbors, &ranksNew);CHKERRQ(ierr); 513 ierr = PetscMalloc1(numNeighbors, &localPointsNew);CHKERRQ(ierr); 514 ierr = PetscMalloc1(numNeighbors, &remotePointsNew);CHKERRQ(ierr); 515 for(proc = 0, n = 0; proc < size; ++proc) { 516 if (PetscBTLookup(neighbors, proc)) { 517 ranksNew[n] = proc; 518 localPointsNew[n] = proc; 519 remotePointsNew[n].index = rank; 520 remotePointsNew[n].rank = proc; 521 ++n; 522 } 523 } 524 ierr = PetscBTDestroy(&neighbors);CHKERRQ(ierr); 525 if (processRanks) {ierr = ISCreateGeneral(PetscObjectComm((PetscObject)dm), numNeighbors, ranksNew, PETSC_OWN_POINTER, processRanks);CHKERRQ(ierr);} 526 else {ierr = PetscFree(ranksNew);CHKERRQ(ierr);} 527 if (sfProcess) { 528 ierr = PetscSFCreate(PetscObjectComm((PetscObject)dm), sfProcess);CHKERRQ(ierr); 529 ierr = PetscObjectSetName((PetscObject) *sfProcess, "Two-Sided Process SF");CHKERRQ(ierr); 530 ierr = PetscSFSetFromOptions(*sfProcess);CHKERRQ(ierr); 531 ierr = PetscSFSetGraph(*sfProcess, size, numNeighbors, localPointsNew, PETSC_OWN_POINTER, remotePointsNew, PETSC_OWN_POINTER);CHKERRQ(ierr); 532 } 533 PetscFunctionReturn(0); 534 } 535 536 /*@ 537 DMPlexDistributeOwnership - Compute owner information for shared points. This basically gets two-sided for an SF. 538 539 Collective on DM 540 541 Input Parameter: 542 . dm - The DM 543 544 Output Parameters: 545 + rootSection - The number of leaves for a given root point 546 . rootrank - The rank of each edge into the root point 547 . leafSection - The number of processes sharing a given leaf point 548 - leafrank - The rank of each process sharing a leaf point 549 550 Level: developer 551 552 .seealso: DMPlexCreateOverlap() 553 @*/ 554 PetscErrorCode DMPlexDistributeOwnership(DM dm, PetscSection rootSection, IS *rootrank, PetscSection leafSection, IS *leafrank) 555 { 556 MPI_Comm comm; 557 PetscSF sfPoint; 558 const PetscInt *rootdegree; 559 PetscInt *myrank, *remoterank; 560 PetscInt pStart, pEnd, p, nedges; 561 PetscMPIInt rank; 562 PetscErrorCode ierr; 563 564 PetscFunctionBegin; 565 ierr = PetscObjectGetComm((PetscObject) dm, &comm);CHKERRQ(ierr); 566 ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr); 567 ierr = DMPlexGetChart(dm, &pStart, &pEnd);CHKERRQ(ierr); 568 ierr = DMGetPointSF(dm, &sfPoint);CHKERRQ(ierr); 569 /* Compute number of leaves for each root */ 570 ierr = PetscObjectSetName((PetscObject) rootSection, "Root Section");CHKERRQ(ierr); 571 ierr = PetscSectionSetChart(rootSection, pStart, pEnd);CHKERRQ(ierr); 572 ierr = PetscSFComputeDegreeBegin(sfPoint, &rootdegree);CHKERRQ(ierr); 573 ierr = PetscSFComputeDegreeEnd(sfPoint, &rootdegree);CHKERRQ(ierr); 574 for (p = pStart; p < pEnd; ++p) {ierr = PetscSectionSetDof(rootSection, p, rootdegree[p-pStart]);CHKERRQ(ierr);} 575 ierr = PetscSectionSetUp(rootSection);CHKERRQ(ierr); 576 /* Gather rank of each leaf to root */ 577 ierr = PetscSectionGetStorageSize(rootSection, &nedges);CHKERRQ(ierr); 578 ierr = PetscMalloc1(pEnd-pStart, &myrank);CHKERRQ(ierr); 579 ierr = PetscMalloc1(nedges, &remoterank);CHKERRQ(ierr); 580 for (p = 0; p < pEnd-pStart; ++p) myrank[p] = rank; 581 ierr = PetscSFGatherBegin(sfPoint, MPIU_INT, myrank, remoterank);CHKERRQ(ierr); 582 ierr = PetscSFGatherEnd(sfPoint, MPIU_INT, myrank, remoterank);CHKERRQ(ierr); 583 ierr = PetscFree(myrank);CHKERRQ(ierr); 584 ierr = ISCreateGeneral(comm, nedges, remoterank, PETSC_OWN_POINTER, rootrank);CHKERRQ(ierr); 585 /* Distribute remote ranks to leaves */ 586 ierr = PetscObjectSetName((PetscObject) leafSection, "Leaf Section");CHKERRQ(ierr); 587 ierr = DMPlexDistributeFieldIS(dm, sfPoint, rootSection, *rootrank, leafSection, leafrank);CHKERRQ(ierr); 588 PetscFunctionReturn(0); 589 } 590 591 /*@C 592 DMPlexCreateOverlap - Compute owner information for shared points. This basically gets two-sided for an SF. 593 594 Collective on DM 595 596 Input Parameters: 597 + dm - The DM 598 . levels - Number of overlap levels 599 . rootSection - The number of leaves for a given root point 600 . rootrank - The rank of each edge into the root point 601 . leafSection - The number of processes sharing a given leaf point 602 - leafrank - The rank of each process sharing a leaf point 603 604 Output Parameters: 605 + ovLabel - DMLabel containing remote overlap contributions as point/rank pairings 606 607 Level: developer 608 609 .seealso: DMPlexDistributeOwnership(), DMPlexDistribute() 610 @*/ 611 PetscErrorCode DMPlexCreateOverlap(DM dm, PetscInt levels, PetscSection rootSection, IS rootrank, PetscSection leafSection, IS leafrank, DMLabel *ovLabel) 612 { 613 MPI_Comm comm; 614 DMLabel ovAdjByRank; /* A DMLabel containing all points adjacent to shared points, separated by rank (value in label) */ 615 PetscSF sfPoint, sfProc; 616 const PetscSFNode *remote; 617 const PetscInt *local; 618 const PetscInt *nrank, *rrank; 619 PetscInt *adj = NULL; 620 PetscInt pStart, pEnd, p, sStart, sEnd, nleaves, l; 621 PetscMPIInt rank, size; 622 PetscBool useCone, useClosure, flg; 623 PetscErrorCode ierr; 624 625 PetscFunctionBegin; 626 ierr = PetscObjectGetComm((PetscObject) dm, &comm);CHKERRQ(ierr); 627 ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr); 628 ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr); 629 ierr = DMGetPointSF(dm, &sfPoint);CHKERRQ(ierr); 630 ierr = DMPlexGetChart(dm, &pStart, &pEnd);CHKERRQ(ierr); 631 ierr = PetscSectionGetChart(leafSection, &sStart, &sEnd);CHKERRQ(ierr); 632 ierr = PetscSFGetGraph(sfPoint, NULL, &nleaves, &local, &remote);CHKERRQ(ierr); 633 ierr = DMLabelCreate("Overlap adjacency", &ovAdjByRank);CHKERRQ(ierr); 634 /* Handle leaves: shared with the root point */ 635 for (l = 0; l < nleaves; ++l) { 636 PetscInt adjSize = PETSC_DETERMINE, a; 637 638 ierr = DMPlexGetAdjacency(dm, local[l], &adjSize, &adj);CHKERRQ(ierr); 639 for (a = 0; a < adjSize; ++a) {ierr = DMLabelSetValue(ovAdjByRank, adj[a], remote[l].rank);CHKERRQ(ierr);} 640 } 641 ierr = ISGetIndices(rootrank, &rrank);CHKERRQ(ierr); 642 ierr = ISGetIndices(leafrank, &nrank);CHKERRQ(ierr); 643 /* Handle roots */ 644 for (p = pStart; p < pEnd; ++p) { 645 PetscInt adjSize = PETSC_DETERMINE, neighbors = 0, noff, n, a; 646 647 if ((p >= sStart) && (p < sEnd)) { 648 /* Some leaves share a root with other leaves on different processes */ 649 ierr = PetscSectionGetDof(leafSection, p, &neighbors);CHKERRQ(ierr); 650 if (neighbors) { 651 ierr = PetscSectionGetOffset(leafSection, p, &noff);CHKERRQ(ierr); 652 ierr = DMPlexGetAdjacency(dm, p, &adjSize, &adj);CHKERRQ(ierr); 653 for (n = 0; n < neighbors; ++n) { 654 const PetscInt remoteRank = nrank[noff+n]; 655 656 if (remoteRank == rank) continue; 657 for (a = 0; a < adjSize; ++a) {ierr = DMLabelSetValue(ovAdjByRank, adj[a], remoteRank);CHKERRQ(ierr);} 658 } 659 } 660 } 661 /* Roots are shared with leaves */ 662 ierr = PetscSectionGetDof(rootSection, p, &neighbors);CHKERRQ(ierr); 663 if (!neighbors) continue; 664 ierr = PetscSectionGetOffset(rootSection, p, &noff);CHKERRQ(ierr); 665 ierr = DMPlexGetAdjacency(dm, p, &adjSize, &adj);CHKERRQ(ierr); 666 for (n = 0; n < neighbors; ++n) { 667 const PetscInt remoteRank = rrank[noff+n]; 668 669 if (remoteRank == rank) continue; 670 for (a = 0; a < adjSize; ++a) {ierr = DMLabelSetValue(ovAdjByRank, adj[a], remoteRank);CHKERRQ(ierr);} 671 } 672 } 673 ierr = PetscFree(adj);CHKERRQ(ierr); 674 ierr = ISRestoreIndices(rootrank, &rrank);CHKERRQ(ierr); 675 ierr = ISRestoreIndices(leafrank, &nrank);CHKERRQ(ierr); 676 /* Add additional overlap levels */ 677 for (l = 1; l < levels; l++) { 678 /* Propagate point donations over SF to capture remote connections */ 679 ierr = DMPlexPartitionLabelPropagate(dm, ovAdjByRank);CHKERRQ(ierr); 680 /* Add next level of point donations to the label */ 681 ierr = DMPlexPartitionLabelAdjacency(dm, ovAdjByRank);CHKERRQ(ierr); 682 } 683 /* We require the closure in the overlap */ 684 ierr = DMPlexGetAdjacencyUseCone(dm, &useCone);CHKERRQ(ierr); 685 ierr = DMPlexGetAdjacencyUseClosure(dm, &useClosure);CHKERRQ(ierr); 686 if (useCone || !useClosure) { 687 ierr = DMPlexPartitionLabelClosure(dm, ovAdjByRank);CHKERRQ(ierr); 688 } 689 ierr = PetscOptionsHasName(((PetscObject) dm)->options,((PetscObject) dm)->prefix, "-overlap_view", &flg);CHKERRQ(ierr); 690 if (flg) { 691 ierr = DMLabelView(ovAdjByRank, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 692 } 693 /* Make global process SF and invert sender to receiver label */ 694 { 695 /* Build a global process SF */ 696 PetscSFNode *remoteProc; 697 ierr = PetscMalloc1(size, &remoteProc);CHKERRQ(ierr); 698 for (p = 0; p < size; ++p) { 699 remoteProc[p].rank = p; 700 remoteProc[p].index = rank; 701 } 702 ierr = PetscSFCreate(comm, &sfProc);CHKERRQ(ierr); 703 ierr = PetscObjectSetName((PetscObject) sfProc, "Process SF");CHKERRQ(ierr); 704 ierr = PetscSFSetGraph(sfProc, size, size, NULL, PETSC_OWN_POINTER, remoteProc, PETSC_OWN_POINTER);CHKERRQ(ierr); 705 } 706 ierr = DMLabelCreate("Overlap label", ovLabel);CHKERRQ(ierr); 707 ierr = DMPlexPartitionLabelInvert(dm, ovAdjByRank, sfProc, *ovLabel);CHKERRQ(ierr); 708 /* Add owned points, except for shared local points */ 709 for (p = pStart; p < pEnd; ++p) {ierr = DMLabelSetValue(*ovLabel, p, rank);CHKERRQ(ierr);} 710 for (l = 0; l < nleaves; ++l) { 711 ierr = DMLabelClearValue(*ovLabel, local[l], rank);CHKERRQ(ierr); 712 ierr = DMLabelSetValue(*ovLabel, remote[l].index, remote[l].rank);CHKERRQ(ierr); 713 } 714 /* Clean up */ 715 ierr = DMLabelDestroy(&ovAdjByRank);CHKERRQ(ierr); 716 ierr = PetscSFDestroy(&sfProc);CHKERRQ(ierr); 717 PetscFunctionReturn(0); 718 } 719 720 /*@C 721 DMPlexCreateOverlapMigrationSF - Create an SF describing the new mesh distribution to make the overlap described by the input SF 722 723 Collective on DM 724 725 Input Parameters: 726 + dm - The DM 727 - overlapSF - The SF mapping ghost points in overlap to owner points on other processes 728 729 Output Parameters: 730 + migrationSF - An SF that maps original points in old locations to points in new locations 731 732 Level: developer 733 734 .seealso: DMPlexCreateOverlap(), DMPlexDistribute() 735 @*/ 736 PetscErrorCode DMPlexCreateOverlapMigrationSF(DM dm, PetscSF overlapSF, PetscSF *migrationSF) 737 { 738 MPI_Comm comm; 739 PetscMPIInt rank, size; 740 PetscInt d, dim, p, pStart, pEnd, nroots, nleaves, newLeaves, point, numSharedPoints; 741 PetscInt *pointDepths, *remoteDepths, *ilocal; 742 PetscInt *depthRecv, *depthShift, *depthIdx; 743 PetscSFNode *iremote; 744 PetscSF pointSF; 745 const PetscInt *sharedLocal; 746 const PetscSFNode *overlapRemote, *sharedRemote; 747 PetscErrorCode ierr; 748 749 PetscFunctionBegin; 750 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 751 ierr = PetscObjectGetComm((PetscObject)dm, &comm);CHKERRQ(ierr); 752 ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr); 753 ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr); 754 ierr = DMGetDimension(dm, &dim);CHKERRQ(ierr); 755 756 /* Before building the migration SF we need to know the new stratum offsets */ 757 ierr = PetscSFGetGraph(overlapSF, &nroots, &nleaves, NULL, &overlapRemote);CHKERRQ(ierr); 758 ierr = PetscMalloc2(nroots, &pointDepths, nleaves, &remoteDepths);CHKERRQ(ierr); 759 for (d=0; d<dim+1; d++) { 760 ierr = DMPlexGetDepthStratum(dm, d, &pStart, &pEnd);CHKERRQ(ierr); 761 for (p=pStart; p<pEnd; p++) pointDepths[p] = d; 762 } 763 for (p=0; p<nleaves; p++) remoteDepths[p] = -1; 764 ierr = PetscSFBcastBegin(overlapSF, MPIU_INT, pointDepths, remoteDepths);CHKERRQ(ierr); 765 ierr = PetscSFBcastEnd(overlapSF, MPIU_INT, pointDepths, remoteDepths);CHKERRQ(ierr); 766 767 /* Count recevied points in each stratum and compute the internal strata shift */ 768 ierr = PetscMalloc3(dim+1, &depthRecv, dim+1, &depthShift, dim+1, &depthIdx);CHKERRQ(ierr); 769 for (d=0; d<dim+1; d++) depthRecv[d]=0; 770 for (p=0; p<nleaves; p++) depthRecv[remoteDepths[p]]++; 771 depthShift[dim] = 0; 772 for (d=0; d<dim; d++) depthShift[d] = depthRecv[dim]; 773 for (d=1; d<dim; d++) depthShift[d] += depthRecv[0]; 774 for (d=dim-2; d>0; d--) depthShift[d] += depthRecv[d+1]; 775 for (d=0; d<dim+1; d++) { 776 ierr = DMPlexGetDepthStratum(dm, d, &pStart, &pEnd);CHKERRQ(ierr); 777 depthIdx[d] = pStart + depthShift[d]; 778 } 779 780 /* Form the overlap SF build an SF that describes the full overlap migration SF */ 781 ierr = DMPlexGetChart(dm, &pStart, &pEnd);CHKERRQ(ierr); 782 newLeaves = pEnd - pStart + nleaves; 783 ierr = PetscMalloc1(newLeaves, &ilocal);CHKERRQ(ierr); 784 ierr = PetscMalloc1(newLeaves, &iremote);CHKERRQ(ierr); 785 /* First map local points to themselves */ 786 for (d=0; d<dim+1; d++) { 787 ierr = DMPlexGetDepthStratum(dm, d, &pStart, &pEnd);CHKERRQ(ierr); 788 for (p=pStart; p<pEnd; p++) { 789 point = p + depthShift[d]; 790 ilocal[point] = point; 791 iremote[point].index = p; 792 iremote[point].rank = rank; 793 depthIdx[d]++; 794 } 795 } 796 797 /* Add in the remote roots for currently shared points */ 798 ierr = DMGetPointSF(dm, &pointSF);CHKERRQ(ierr); 799 ierr = PetscSFGetGraph(pointSF, NULL, &numSharedPoints, &sharedLocal, &sharedRemote);CHKERRQ(ierr); 800 for (d=0; d<dim+1; d++) { 801 ierr = DMPlexGetDepthStratum(dm, d, &pStart, &pEnd);CHKERRQ(ierr); 802 for (p=0; p<numSharedPoints; p++) { 803 if (pStart <= sharedLocal[p] && sharedLocal[p] < pEnd) { 804 point = sharedLocal[p] + depthShift[d]; 805 iremote[point].index = sharedRemote[p].index; 806 iremote[point].rank = sharedRemote[p].rank; 807 } 808 } 809 } 810 811 /* Now add the incoming overlap points */ 812 for (p=0; p<nleaves; p++) { 813 point = depthIdx[remoteDepths[p]]; 814 ilocal[point] = point; 815 iremote[point].index = overlapRemote[p].index; 816 iremote[point].rank = overlapRemote[p].rank; 817 depthIdx[remoteDepths[p]]++; 818 } 819 ierr = PetscFree2(pointDepths,remoteDepths);CHKERRQ(ierr); 820 821 ierr = PetscSFCreate(comm, migrationSF);CHKERRQ(ierr); 822 ierr = PetscObjectSetName((PetscObject) *migrationSF, "Overlap Migration SF");CHKERRQ(ierr); 823 ierr = PetscSFSetFromOptions(*migrationSF);CHKERRQ(ierr); 824 ierr = DMPlexGetChart(dm, &pStart, &pEnd);CHKERRQ(ierr); 825 ierr = PetscSFSetGraph(*migrationSF, pEnd-pStart, newLeaves, ilocal, PETSC_OWN_POINTER, iremote, PETSC_OWN_POINTER);CHKERRQ(ierr); 826 827 ierr = PetscFree3(depthRecv, depthShift, depthIdx);CHKERRQ(ierr); 828 PetscFunctionReturn(0); 829 } 830 831 /*@ 832 DMPlexStratifyMigrationSF - Rearrange the leaves of a migration sf for stratification. 833 834 Input Parameter: 835 + dm - The DM 836 - sf - A star forest with non-ordered leaves, usually defining a DM point migration 837 838 Output Parameter: 839 . migrationSF - A star forest with added leaf indirection that ensures the resulting DM is stratified 840 841 Level: developer 842 843 .seealso: DMPlexPartitionLabelCreateSF(), DMPlexDistribute(), DMPlexDistributeOverlap() 844 @*/ 845 PetscErrorCode DMPlexStratifyMigrationSF(DM dm, PetscSF sf, PetscSF *migrationSF) 846 { 847 MPI_Comm comm; 848 PetscMPIInt rank, size; 849 PetscInt d, ldepth, depth, p, pStart, pEnd, nroots, nleaves; 850 PetscInt *pointDepths, *remoteDepths, *ilocal; 851 PetscInt *depthRecv, *depthShift, *depthIdx; 852 PetscInt hybEnd[4]; 853 const PetscSFNode *iremote; 854 PetscErrorCode ierr; 855 856 PetscFunctionBegin; 857 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 858 ierr = PetscObjectGetComm((PetscObject) dm, &comm);CHKERRQ(ierr); 859 ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr); 860 ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr); 861 ierr = DMPlexGetDepth(dm, &ldepth);CHKERRQ(ierr); 862 ierr = MPIU_Allreduce(&ldepth, &depth, 1, MPIU_INT, MPI_MAX, comm);CHKERRQ(ierr); 863 if ((ldepth >= 0) && (depth != ldepth)) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Inconsistent Plex depth %d != %d", ldepth, depth); 864 865 /* Before building the migration SF we need to know the new stratum offsets */ 866 ierr = PetscSFGetGraph(sf, &nroots, &nleaves, NULL, &iremote);CHKERRQ(ierr); 867 ierr = PetscMalloc2(nroots, &pointDepths, nleaves, &remoteDepths);CHKERRQ(ierr); 868 ierr = DMPlexGetHybridBounds(dm,&hybEnd[depth],&hybEnd[depth-1],&hybEnd[1],&hybEnd[0]);CHKERRQ(ierr); 869 for (d = 0; d < depth+1; ++d) { 870 ierr = DMPlexGetDepthStratum(dm, d, &pStart, &pEnd);CHKERRQ(ierr); 871 for (p = pStart; p < pEnd; ++p) { 872 if (hybEnd[d] >= 0 && p >= hybEnd[d]) { /* put in a separate value for hybrid points */ 873 pointDepths[p] = 2 * d; 874 } else { 875 pointDepths[p] = 2 * d + 1; 876 } 877 } 878 } 879 for (p = 0; p < nleaves; ++p) remoteDepths[p] = -1; 880 ierr = PetscSFBcastBegin(sf, MPIU_INT, pointDepths, remoteDepths);CHKERRQ(ierr); 881 ierr = PetscSFBcastEnd(sf, MPIU_INT, pointDepths, remoteDepths);CHKERRQ(ierr); 882 /* Count recevied points in each stratum and compute the internal strata shift */ 883 ierr = PetscMalloc3(2*(depth+1), &depthRecv, 2*(depth+1), &depthShift, 2*(depth+1), &depthIdx);CHKERRQ(ierr); 884 for (d = 0; d < 2*(depth+1); ++d) depthRecv[d] = 0; 885 for (p = 0; p < nleaves; ++p) depthRecv[remoteDepths[p]]++; 886 depthShift[2*depth+1] = 0; 887 for (d = 0; d < 2*depth+1; ++d) depthShift[d] = depthRecv[2 * depth + 1]; 888 for (d = 0; d < 2*depth; ++d) depthShift[d] += depthRecv[2 * depth]; 889 depthShift[0] += depthRecv[1]; 890 for (d = 2; d < 2*depth; ++d) depthShift[d] += depthRecv[1]; 891 for (d = 2; d < 2*depth; ++d) depthShift[d] += depthRecv[0]; 892 for (d = 2 * depth-1; d > 2; --d) { 893 PetscInt e; 894 895 for (e = d -1; e > 1; --e) depthShift[e] += depthRecv[d]; 896 } 897 for (d = 0; d < 2*(depth+1); ++d) {depthIdx[d] = 0;} 898 /* Derive a new local permutation based on stratified indices */ 899 ierr = PetscMalloc1(nleaves, &ilocal);CHKERRQ(ierr); 900 for (p = 0; p < nleaves; ++p) { 901 const PetscInt dep = remoteDepths[p]; 902 903 ilocal[p] = depthShift[dep] + depthIdx[dep]; 904 depthIdx[dep]++; 905 } 906 ierr = PetscSFCreate(comm, migrationSF);CHKERRQ(ierr); 907 ierr = PetscObjectSetName((PetscObject) *migrationSF, "Migration SF");CHKERRQ(ierr); 908 ierr = PetscSFSetGraph(*migrationSF, nroots, nleaves, ilocal, PETSC_OWN_POINTER, iremote, PETSC_COPY_VALUES);CHKERRQ(ierr); 909 ierr = PetscFree2(pointDepths,remoteDepths);CHKERRQ(ierr); 910 ierr = PetscFree3(depthRecv, depthShift, depthIdx);CHKERRQ(ierr); 911 PetscFunctionReturn(0); 912 } 913 914 /*@ 915 DMPlexDistributeField - Distribute field data to match a given PetscSF, usually the SF from mesh distribution 916 917 Collective on DM 918 919 Input Parameters: 920 + dm - The DMPlex object 921 . pointSF - The PetscSF describing the communication pattern 922 . originalSection - The PetscSection for existing data layout 923 - originalVec - The existing data 924 925 Output Parameters: 926 + newSection - The PetscSF describing the new data layout 927 - newVec - The new data 928 929 Level: developer 930 931 .seealso: DMPlexDistribute(), DMPlexDistributeFieldIS(), DMPlexDistributeData() 932 @*/ 933 PetscErrorCode DMPlexDistributeField(DM dm, PetscSF pointSF, PetscSection originalSection, Vec originalVec, PetscSection newSection, Vec newVec) 934 { 935 PetscSF fieldSF; 936 PetscInt *remoteOffsets, fieldSize; 937 PetscScalar *originalValues, *newValues; 938 PetscErrorCode ierr; 939 940 PetscFunctionBegin; 941 ierr = PetscLogEventBegin(DMPLEX_DistributeField,dm,0,0,0);CHKERRQ(ierr); 942 ierr = PetscSFDistributeSection(pointSF, originalSection, &remoteOffsets, newSection);CHKERRQ(ierr); 943 944 ierr = PetscSectionGetStorageSize(newSection, &fieldSize);CHKERRQ(ierr); 945 ierr = VecSetSizes(newVec, fieldSize, PETSC_DETERMINE);CHKERRQ(ierr); 946 ierr = VecSetType(newVec,dm->vectype);CHKERRQ(ierr); 947 948 ierr = VecGetArray(originalVec, &originalValues);CHKERRQ(ierr); 949 ierr = VecGetArray(newVec, &newValues);CHKERRQ(ierr); 950 ierr = PetscSFCreateSectionSF(pointSF, originalSection, remoteOffsets, newSection, &fieldSF);CHKERRQ(ierr); 951 ierr = PetscFree(remoteOffsets);CHKERRQ(ierr); 952 ierr = PetscSFBcastBegin(fieldSF, MPIU_SCALAR, originalValues, newValues);CHKERRQ(ierr); 953 ierr = PetscSFBcastEnd(fieldSF, MPIU_SCALAR, originalValues, newValues);CHKERRQ(ierr); 954 ierr = PetscSFDestroy(&fieldSF);CHKERRQ(ierr); 955 ierr = VecRestoreArray(newVec, &newValues);CHKERRQ(ierr); 956 ierr = VecRestoreArray(originalVec, &originalValues);CHKERRQ(ierr); 957 ierr = PetscLogEventEnd(DMPLEX_DistributeField,dm,0,0,0);CHKERRQ(ierr); 958 PetscFunctionReturn(0); 959 } 960 961 /*@ 962 DMPlexDistributeFieldIS - Distribute field data to match a given PetscSF, usually the SF from mesh distribution 963 964 Collective on DM 965 966 Input Parameters: 967 + dm - The DMPlex object 968 . pointSF - The PetscSF describing the communication pattern 969 . originalSection - The PetscSection for existing data layout 970 - originalIS - The existing data 971 972 Output Parameters: 973 + newSection - The PetscSF describing the new data layout 974 - newIS - The new data 975 976 Level: developer 977 978 .seealso: DMPlexDistribute(), DMPlexDistributeField(), DMPlexDistributeData() 979 @*/ 980 PetscErrorCode DMPlexDistributeFieldIS(DM dm, PetscSF pointSF, PetscSection originalSection, IS originalIS, PetscSection newSection, IS *newIS) 981 { 982 PetscSF fieldSF; 983 PetscInt *newValues, *remoteOffsets, fieldSize; 984 const PetscInt *originalValues; 985 PetscErrorCode ierr; 986 987 PetscFunctionBegin; 988 ierr = PetscLogEventBegin(DMPLEX_DistributeField,dm,0,0,0);CHKERRQ(ierr); 989 ierr = PetscSFDistributeSection(pointSF, originalSection, &remoteOffsets, newSection);CHKERRQ(ierr); 990 991 ierr = PetscSectionGetStorageSize(newSection, &fieldSize);CHKERRQ(ierr); 992 ierr = PetscMalloc1(fieldSize, &newValues);CHKERRQ(ierr); 993 994 ierr = ISGetIndices(originalIS, &originalValues);CHKERRQ(ierr); 995 ierr = PetscSFCreateSectionSF(pointSF, originalSection, remoteOffsets, newSection, &fieldSF);CHKERRQ(ierr); 996 ierr = PetscFree(remoteOffsets);CHKERRQ(ierr); 997 ierr = PetscSFBcastBegin(fieldSF, MPIU_INT, (PetscInt *) originalValues, newValues);CHKERRQ(ierr); 998 ierr = PetscSFBcastEnd(fieldSF, MPIU_INT, (PetscInt *) originalValues, newValues);CHKERRQ(ierr); 999 ierr = PetscSFDestroy(&fieldSF);CHKERRQ(ierr); 1000 ierr = ISRestoreIndices(originalIS, &originalValues);CHKERRQ(ierr); 1001 ierr = ISCreateGeneral(PetscObjectComm((PetscObject) pointSF), fieldSize, newValues, PETSC_OWN_POINTER, newIS);CHKERRQ(ierr); 1002 ierr = PetscLogEventEnd(DMPLEX_DistributeField,dm,0,0,0);CHKERRQ(ierr); 1003 PetscFunctionReturn(0); 1004 } 1005 1006 /*@ 1007 DMPlexDistributeData - Distribute field data to match a given PetscSF, usually the SF from mesh distribution 1008 1009 Collective on DM 1010 1011 Input Parameters: 1012 + dm - The DMPlex object 1013 . pointSF - The PetscSF describing the communication pattern 1014 . originalSection - The PetscSection for existing data layout 1015 . datatype - The type of data 1016 - originalData - The existing data 1017 1018 Output Parameters: 1019 + newSection - The PetscSection describing the new data layout 1020 - newData - The new data 1021 1022 Level: developer 1023 1024 .seealso: DMPlexDistribute(), DMPlexDistributeField() 1025 @*/ 1026 PetscErrorCode DMPlexDistributeData(DM dm, PetscSF pointSF, PetscSection originalSection, MPI_Datatype datatype, void *originalData, PetscSection newSection, void **newData) 1027 { 1028 PetscSF fieldSF; 1029 PetscInt *remoteOffsets, fieldSize; 1030 PetscMPIInt dataSize; 1031 PetscErrorCode ierr; 1032 1033 PetscFunctionBegin; 1034 ierr = PetscLogEventBegin(DMPLEX_DistributeData,dm,0,0,0);CHKERRQ(ierr); 1035 ierr = PetscSFDistributeSection(pointSF, originalSection, &remoteOffsets, newSection);CHKERRQ(ierr); 1036 1037 ierr = PetscSectionGetStorageSize(newSection, &fieldSize);CHKERRQ(ierr); 1038 ierr = MPI_Type_size(datatype, &dataSize);CHKERRQ(ierr); 1039 ierr = PetscMalloc(fieldSize * dataSize, newData);CHKERRQ(ierr); 1040 1041 ierr = PetscSFCreateSectionSF(pointSF, originalSection, remoteOffsets, newSection, &fieldSF);CHKERRQ(ierr); 1042 ierr = PetscFree(remoteOffsets);CHKERRQ(ierr); 1043 ierr = PetscSFBcastBegin(fieldSF, datatype, originalData, *newData);CHKERRQ(ierr); 1044 ierr = PetscSFBcastEnd(fieldSF, datatype, originalData, *newData);CHKERRQ(ierr); 1045 ierr = PetscSFDestroy(&fieldSF);CHKERRQ(ierr); 1046 ierr = PetscLogEventEnd(DMPLEX_DistributeData,dm,0,0,0);CHKERRQ(ierr); 1047 PetscFunctionReturn(0); 1048 } 1049 1050 static PetscErrorCode DMPlexDistributeCones(DM dm, PetscSF migrationSF, ISLocalToGlobalMapping original, ISLocalToGlobalMapping renumbering, DM dmParallel) 1051 { 1052 DM_Plex *pmesh = (DM_Plex*) (dmParallel)->data; 1053 MPI_Comm comm; 1054 PetscSF coneSF; 1055 PetscSection originalConeSection, newConeSection; 1056 PetscInt *remoteOffsets, *cones, *globCones, *newCones, newConesSize; 1057 PetscBool flg; 1058 PetscErrorCode ierr; 1059 1060 PetscFunctionBegin; 1061 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 1062 PetscValidHeaderSpecific(dmParallel, DM_CLASSID, 5); 1063 1064 ierr = PetscLogEventBegin(DMPLEX_DistributeCones,dm,0,0,0);CHKERRQ(ierr); 1065 /* Distribute cone section */ 1066 ierr = PetscObjectGetComm((PetscObject)dm, &comm);CHKERRQ(ierr); 1067 ierr = DMPlexGetConeSection(dm, &originalConeSection);CHKERRQ(ierr); 1068 ierr = DMPlexGetConeSection(dmParallel, &newConeSection);CHKERRQ(ierr); 1069 ierr = PetscSFDistributeSection(migrationSF, originalConeSection, &remoteOffsets, newConeSection);CHKERRQ(ierr); 1070 ierr = DMSetUp(dmParallel);CHKERRQ(ierr); 1071 { 1072 PetscInt pStart, pEnd, p; 1073 1074 ierr = PetscSectionGetChart(newConeSection, &pStart, &pEnd);CHKERRQ(ierr); 1075 for (p = pStart; p < pEnd; ++p) { 1076 PetscInt coneSize; 1077 ierr = PetscSectionGetDof(newConeSection, p, &coneSize);CHKERRQ(ierr); 1078 pmesh->maxConeSize = PetscMax(pmesh->maxConeSize, coneSize); 1079 } 1080 } 1081 /* Communicate and renumber cones */ 1082 ierr = PetscSFCreateSectionSF(migrationSF, originalConeSection, remoteOffsets, newConeSection, &coneSF);CHKERRQ(ierr); 1083 ierr = PetscFree(remoteOffsets);CHKERRQ(ierr); 1084 ierr = DMPlexGetCones(dm, &cones);CHKERRQ(ierr); 1085 if (original) { 1086 PetscInt numCones; 1087 1088 ierr = PetscSectionGetStorageSize(originalConeSection,&numCones);CHKERRQ(ierr); ierr = PetscMalloc1(numCones,&globCones);CHKERRQ(ierr); 1089 ierr = ISLocalToGlobalMappingApplyBlock(original, numCones, cones, globCones);CHKERRQ(ierr); 1090 } 1091 else { 1092 globCones = cones; 1093 } 1094 ierr = DMPlexGetCones(dmParallel, &newCones);CHKERRQ(ierr); 1095 ierr = PetscSFBcastBegin(coneSF, MPIU_INT, globCones, newCones);CHKERRQ(ierr); 1096 ierr = PetscSFBcastEnd(coneSF, MPIU_INT, globCones, newCones);CHKERRQ(ierr); 1097 if (original) { 1098 ierr = PetscFree(globCones);CHKERRQ(ierr); 1099 } 1100 ierr = PetscSectionGetStorageSize(newConeSection, &newConesSize);CHKERRQ(ierr); 1101 ierr = ISGlobalToLocalMappingApplyBlock(renumbering, IS_GTOLM_MASK, newConesSize, newCones, NULL, newCones);CHKERRQ(ierr); 1102 #if PETSC_USE_DEBUG 1103 { 1104 PetscInt p; 1105 PetscBool valid = PETSC_TRUE; 1106 for (p = 0; p < newConesSize; ++p) { 1107 if (newCones[p] < 0) {valid = PETSC_FALSE; ierr = PetscPrintf(PETSC_COMM_SELF, "Point %d not in overlap SF\n", p);CHKERRQ(ierr);} 1108 } 1109 if (!valid) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Invalid global to local map"); 1110 } 1111 #endif 1112 ierr = PetscOptionsHasName(((PetscObject) dm)->options,((PetscObject) dm)->prefix, "-cones_view", &flg);CHKERRQ(ierr); 1113 if (flg) { 1114 ierr = PetscPrintf(comm, "Serial Cone Section:\n");CHKERRQ(ierr); 1115 ierr = PetscSectionView(originalConeSection, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 1116 ierr = PetscPrintf(comm, "Parallel Cone Section:\n");CHKERRQ(ierr); 1117 ierr = PetscSectionView(newConeSection, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 1118 ierr = PetscSFView(coneSF, NULL);CHKERRQ(ierr); 1119 } 1120 ierr = DMPlexGetConeOrientations(dm, &cones);CHKERRQ(ierr); 1121 ierr = DMPlexGetConeOrientations(dmParallel, &newCones);CHKERRQ(ierr); 1122 ierr = PetscSFBcastBegin(coneSF, MPIU_INT, cones, newCones);CHKERRQ(ierr); 1123 ierr = PetscSFBcastEnd(coneSF, MPIU_INT, cones, newCones);CHKERRQ(ierr); 1124 ierr = PetscSFDestroy(&coneSF);CHKERRQ(ierr); 1125 ierr = PetscLogEventEnd(DMPLEX_DistributeCones,dm,0,0,0);CHKERRQ(ierr); 1126 /* Create supports and stratify DMPlex */ 1127 { 1128 PetscInt pStart, pEnd; 1129 1130 ierr = PetscSectionGetChart(pmesh->coneSection, &pStart, &pEnd);CHKERRQ(ierr); 1131 ierr = PetscSectionSetChart(pmesh->supportSection, pStart, pEnd);CHKERRQ(ierr); 1132 } 1133 ierr = DMPlexSymmetrize(dmParallel);CHKERRQ(ierr); 1134 ierr = DMPlexStratify(dmParallel);CHKERRQ(ierr); 1135 { 1136 PetscBool useCone, useClosure, useAnchors; 1137 1138 ierr = DMPlexGetAdjacencyUseCone(dm, &useCone);CHKERRQ(ierr); 1139 ierr = DMPlexGetAdjacencyUseClosure(dm, &useClosure);CHKERRQ(ierr); 1140 ierr = DMPlexGetAdjacencyUseAnchors(dm, &useAnchors);CHKERRQ(ierr); 1141 ierr = DMPlexSetAdjacencyUseCone(dmParallel, useCone);CHKERRQ(ierr); 1142 ierr = DMPlexSetAdjacencyUseClosure(dmParallel, useClosure);CHKERRQ(ierr); 1143 ierr = DMPlexSetAdjacencyUseAnchors(dmParallel, useAnchors);CHKERRQ(ierr); 1144 } 1145 PetscFunctionReturn(0); 1146 } 1147 1148 static PetscErrorCode DMPlexDistributeCoordinates(DM dm, PetscSF migrationSF, DM dmParallel) 1149 { 1150 MPI_Comm comm; 1151 PetscSection originalCoordSection, newCoordSection; 1152 Vec originalCoordinates, newCoordinates; 1153 PetscInt bs; 1154 PetscBool isper; 1155 const char *name; 1156 const PetscReal *maxCell, *L; 1157 const DMBoundaryType *bd; 1158 PetscErrorCode ierr; 1159 1160 PetscFunctionBegin; 1161 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 1162 PetscValidHeaderSpecific(dmParallel, DM_CLASSID, 3); 1163 1164 ierr = PetscObjectGetComm((PetscObject)dm, &comm);CHKERRQ(ierr); 1165 ierr = DMGetCoordinateSection(dm, &originalCoordSection);CHKERRQ(ierr); 1166 ierr = DMGetCoordinateSection(dmParallel, &newCoordSection);CHKERRQ(ierr); 1167 ierr = DMGetCoordinatesLocal(dm, &originalCoordinates);CHKERRQ(ierr); 1168 if (originalCoordinates) { 1169 ierr = VecCreate(PETSC_COMM_SELF, &newCoordinates);CHKERRQ(ierr); 1170 ierr = PetscObjectGetName((PetscObject) originalCoordinates, &name);CHKERRQ(ierr); 1171 ierr = PetscObjectSetName((PetscObject) newCoordinates, name);CHKERRQ(ierr); 1172 1173 ierr = DMPlexDistributeField(dm, migrationSF, originalCoordSection, originalCoordinates, newCoordSection, newCoordinates);CHKERRQ(ierr); 1174 ierr = DMSetCoordinatesLocal(dmParallel, newCoordinates);CHKERRQ(ierr); 1175 ierr = VecGetBlockSize(originalCoordinates, &bs);CHKERRQ(ierr); 1176 ierr = VecSetBlockSize(newCoordinates, bs);CHKERRQ(ierr); 1177 ierr = VecDestroy(&newCoordinates);CHKERRQ(ierr); 1178 } 1179 ierr = DMGetPeriodicity(dm, &isper, &maxCell, &L, &bd);CHKERRQ(ierr); 1180 ierr = DMSetPeriodicity(dmParallel, isper, maxCell, L, bd);CHKERRQ(ierr); 1181 PetscFunctionReturn(0); 1182 } 1183 1184 /* Here we are assuming that process 0 always has everything */ 1185 static PetscErrorCode DMPlexDistributeLabels(DM dm, PetscSF migrationSF, DM dmParallel) 1186 { 1187 DM_Plex *mesh = (DM_Plex*) dm->data; 1188 MPI_Comm comm; 1189 DMLabel depthLabel; 1190 PetscMPIInt rank; 1191 PetscInt depth, d, numLabels, numLocalLabels, l; 1192 PetscBool hasLabels = PETSC_FALSE, lsendDepth, sendDepth; 1193 PetscObjectState depthState = -1; 1194 PetscErrorCode ierr; 1195 1196 PetscFunctionBegin; 1197 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 1198 PetscValidHeaderSpecific(dmParallel, DM_CLASSID, 3); 1199 1200 ierr = PetscLogEventBegin(DMPLEX_DistributeLabels,dm,0,0,0);CHKERRQ(ierr); 1201 ierr = PetscObjectGetComm((PetscObject)dm, &comm);CHKERRQ(ierr); 1202 ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr); 1203 1204 /* If the user has changed the depth label, communicate it instead */ 1205 ierr = DMPlexGetDepth(dm, &depth);CHKERRQ(ierr); 1206 ierr = DMPlexGetDepthLabel(dm, &depthLabel);CHKERRQ(ierr); 1207 if (depthLabel) {ierr = DMLabelGetState(depthLabel, &depthState);CHKERRQ(ierr);} 1208 lsendDepth = mesh->depthState != depthState ? PETSC_TRUE : PETSC_FALSE; 1209 ierr = MPIU_Allreduce(&lsendDepth, &sendDepth, 1, MPIU_BOOL, MPI_LOR, comm);CHKERRQ(ierr); 1210 if (sendDepth) { 1211 ierr = DMRemoveLabel(dmParallel, "depth", &depthLabel);CHKERRQ(ierr); 1212 ierr = DMLabelDestroy(&depthLabel);CHKERRQ(ierr); 1213 } 1214 /* Everyone must have either the same number of labels, or none */ 1215 ierr = DMGetNumLabels(dm, &numLocalLabels);CHKERRQ(ierr); 1216 numLabels = numLocalLabels; 1217 ierr = MPI_Bcast(&numLabels, 1, MPIU_INT, 0, comm);CHKERRQ(ierr); 1218 if (numLabels == numLocalLabels) hasLabels = PETSC_TRUE; 1219 for (l = numLabels-1; l >= 0; --l) { 1220 DMLabel label = NULL, labelNew = NULL; 1221 PetscBool isDepth, lisOutput = PETSC_TRUE, isOutput; 1222 1223 if (hasLabels) {ierr = DMGetLabelByNum(dm, l, &label);CHKERRQ(ierr);} 1224 /* Skip "depth" because it is recreated */ 1225 if (hasLabels) {ierr = PetscStrcmp(label->name, "depth", &isDepth);CHKERRQ(ierr);} 1226 ierr = MPI_Bcast(&isDepth, 1, MPIU_BOOL, 0, comm);CHKERRQ(ierr); 1227 if (isDepth && !sendDepth) continue; 1228 ierr = DMLabelDistribute(label, migrationSF, &labelNew);CHKERRQ(ierr); 1229 if (isDepth) { 1230 /* Put in any missing strata which can occur if users are managing the depth label themselves */ 1231 PetscInt gdepth; 1232 1233 ierr = MPIU_Allreduce(&depth, &gdepth, 1, MPIU_INT, MPI_MAX, comm);CHKERRQ(ierr); 1234 if ((depth >= 0) && (gdepth != depth)) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Inconsistent Plex depth %d != %d", depth, gdepth); 1235 for (d = 0; d <= gdepth; ++d) { 1236 PetscBool has; 1237 1238 ierr = DMLabelHasStratum(labelNew, d, &has);CHKERRQ(ierr); 1239 if (!has) {ierr = DMLabelAddStratum(labelNew, d);CHKERRQ(ierr);} 1240 } 1241 } 1242 ierr = DMAddLabel(dmParallel, labelNew);CHKERRQ(ierr); 1243 /* Put the output flag in the new label */ 1244 if (hasLabels) {ierr = DMGetLabelOutput(dm, label->name, &lisOutput);CHKERRQ(ierr);} 1245 ierr = MPIU_Allreduce(&lisOutput, &isOutput, 1, MPIU_BOOL, MPI_LAND, comm);CHKERRQ(ierr); 1246 ierr = DMSetLabelOutput(dmParallel, labelNew->name, isOutput);CHKERRQ(ierr); 1247 } 1248 ierr = PetscLogEventEnd(DMPLEX_DistributeLabels,dm,0,0,0);CHKERRQ(ierr); 1249 PetscFunctionReturn(0); 1250 } 1251 1252 static PetscErrorCode DMPlexDistributeSetupHybrid(DM dm, PetscSF migrationSF, ISLocalToGlobalMapping renumbering, DM dmParallel) 1253 { 1254 DM_Plex *mesh = (DM_Plex*) dm->data; 1255 DM_Plex *pmesh = (DM_Plex*) (dmParallel)->data; 1256 PetscBool *isHybrid, *isHybridParallel; 1257 PetscInt dim, depth, d; 1258 PetscInt pStart, pEnd, pStartP, pEndP; 1259 PetscErrorCode ierr; 1260 1261 PetscFunctionBegin; 1262 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 1263 PetscValidHeaderSpecific(dmParallel, DM_CLASSID, 3); 1264 1265 ierr = DMGetDimension(dm, &dim);CHKERRQ(ierr); 1266 ierr = DMPlexGetDepth(dm, &depth);CHKERRQ(ierr); 1267 ierr = DMPlexGetChart(dm,&pStart,&pEnd);CHKERRQ(ierr); 1268 ierr = DMPlexGetChart(dmParallel,&pStartP,&pEndP);CHKERRQ(ierr); 1269 ierr = PetscCalloc2(pEnd-pStart,&isHybrid,pEndP-pStartP,&isHybridParallel);CHKERRQ(ierr); 1270 for (d = 0; d <= depth; d++) { 1271 PetscInt hybridMax = (depth == 1 && d == 1) ? mesh->hybridPointMax[dim] : mesh->hybridPointMax[d]; 1272 1273 if (hybridMax >= 0) { 1274 PetscInt sStart, sEnd, p; 1275 1276 ierr = DMPlexGetDepthStratum(dm,d,&sStart,&sEnd);CHKERRQ(ierr); 1277 for (p = hybridMax; p < sEnd; p++) isHybrid[p-pStart] = PETSC_TRUE; 1278 } 1279 } 1280 ierr = PetscSFBcastBegin(migrationSF,MPIU_BOOL,isHybrid,isHybridParallel);CHKERRQ(ierr); 1281 ierr = PetscSFBcastEnd(migrationSF,MPIU_BOOL,isHybrid,isHybridParallel);CHKERRQ(ierr); 1282 for (d = 0; d <= dim; d++) pmesh->hybridPointMax[d] = -1; 1283 for (d = 0; d <= depth; d++) { 1284 PetscInt sStart, sEnd, p, dd; 1285 1286 ierr = DMPlexGetDepthStratum(dmParallel,d,&sStart,&sEnd);CHKERRQ(ierr); 1287 dd = (depth == 1 && d == 1) ? dim : d; 1288 for (p = sStart; p < sEnd; p++) { 1289 if (isHybridParallel[p-pStartP]) { 1290 pmesh->hybridPointMax[dd] = p; 1291 break; 1292 } 1293 } 1294 } 1295 ierr = PetscFree2(isHybrid,isHybridParallel);CHKERRQ(ierr); 1296 PetscFunctionReturn(0); 1297 } 1298 1299 static PetscErrorCode DMPlexDistributeSetupTree(DM dm, PetscSF migrationSF, ISLocalToGlobalMapping original, ISLocalToGlobalMapping renumbering, DM dmParallel) 1300 { 1301 DM_Plex *mesh = (DM_Plex*) dm->data; 1302 DM_Plex *pmesh = (DM_Plex*) (dmParallel)->data; 1303 MPI_Comm comm; 1304 DM refTree; 1305 PetscSection origParentSection, newParentSection; 1306 PetscInt *origParents, *origChildIDs; 1307 PetscBool flg; 1308 PetscErrorCode ierr; 1309 1310 PetscFunctionBegin; 1311 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 1312 PetscValidHeaderSpecific(dmParallel, DM_CLASSID, 5); 1313 ierr = PetscObjectGetComm((PetscObject)dm, &comm);CHKERRQ(ierr); 1314 1315 /* Set up tree */ 1316 ierr = DMPlexGetReferenceTree(dm,&refTree);CHKERRQ(ierr); 1317 ierr = DMPlexSetReferenceTree(dmParallel,refTree);CHKERRQ(ierr); 1318 ierr = DMPlexGetTree(dm,&origParentSection,&origParents,&origChildIDs,NULL,NULL);CHKERRQ(ierr); 1319 if (origParentSection) { 1320 PetscInt pStart, pEnd; 1321 PetscInt *newParents, *newChildIDs, *globParents; 1322 PetscInt *remoteOffsetsParents, newParentSize; 1323 PetscSF parentSF; 1324 1325 ierr = DMPlexGetChart(dmParallel, &pStart, &pEnd);CHKERRQ(ierr); 1326 ierr = PetscSectionCreate(PetscObjectComm((PetscObject)dmParallel),&newParentSection);CHKERRQ(ierr); 1327 ierr = PetscSectionSetChart(newParentSection,pStart,pEnd);CHKERRQ(ierr); 1328 ierr = PetscSFDistributeSection(migrationSF, origParentSection, &remoteOffsetsParents, newParentSection);CHKERRQ(ierr); 1329 ierr = PetscSFCreateSectionSF(migrationSF, origParentSection, remoteOffsetsParents, newParentSection, &parentSF);CHKERRQ(ierr); 1330 ierr = PetscFree(remoteOffsetsParents);CHKERRQ(ierr); 1331 ierr = PetscSectionGetStorageSize(newParentSection,&newParentSize);CHKERRQ(ierr); 1332 ierr = PetscMalloc2(newParentSize,&newParents,newParentSize,&newChildIDs);CHKERRQ(ierr); 1333 if (original) { 1334 PetscInt numParents; 1335 1336 ierr = PetscSectionGetStorageSize(origParentSection,&numParents);CHKERRQ(ierr); 1337 ierr = PetscMalloc1(numParents,&globParents);CHKERRQ(ierr); 1338 ierr = ISLocalToGlobalMappingApplyBlock(original, numParents, origParents, globParents);CHKERRQ(ierr); 1339 } 1340 else { 1341 globParents = origParents; 1342 } 1343 ierr = PetscSFBcastBegin(parentSF, MPIU_INT, globParents, newParents);CHKERRQ(ierr); 1344 ierr = PetscSFBcastEnd(parentSF, MPIU_INT, globParents, newParents);CHKERRQ(ierr); 1345 if (original) { 1346 ierr = PetscFree(globParents);CHKERRQ(ierr); 1347 } 1348 ierr = PetscSFBcastBegin(parentSF, MPIU_INT, origChildIDs, newChildIDs);CHKERRQ(ierr); 1349 ierr = PetscSFBcastEnd(parentSF, MPIU_INT, origChildIDs, newChildIDs);CHKERRQ(ierr); 1350 ierr = ISGlobalToLocalMappingApplyBlock(renumbering,IS_GTOLM_MASK, newParentSize, newParents, NULL, newParents);CHKERRQ(ierr); 1351 #if PETSC_USE_DEBUG 1352 { 1353 PetscInt p; 1354 PetscBool valid = PETSC_TRUE; 1355 for (p = 0; p < newParentSize; ++p) { 1356 if (newParents[p] < 0) {valid = PETSC_FALSE; ierr = PetscPrintf(PETSC_COMM_SELF, "Point %d not in overlap SF\n", p);CHKERRQ(ierr);} 1357 } 1358 if (!valid) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_OUTOFRANGE, "Invalid global to local map"); 1359 } 1360 #endif 1361 ierr = PetscOptionsHasName(((PetscObject) dm)->options,((PetscObject) dm)->prefix, "-parents_view", &flg);CHKERRQ(ierr); 1362 if (flg) { 1363 ierr = PetscPrintf(comm, "Serial Parent Section: \n");CHKERRQ(ierr); 1364 ierr = PetscSectionView(origParentSection, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 1365 ierr = PetscPrintf(comm, "Parallel Parent Section: \n");CHKERRQ(ierr); 1366 ierr = PetscSectionView(newParentSection, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 1367 ierr = PetscSFView(parentSF, NULL);CHKERRQ(ierr); 1368 } 1369 ierr = DMPlexSetTree(dmParallel,newParentSection,newParents,newChildIDs);CHKERRQ(ierr); 1370 ierr = PetscSectionDestroy(&newParentSection);CHKERRQ(ierr); 1371 ierr = PetscFree2(newParents,newChildIDs);CHKERRQ(ierr); 1372 ierr = PetscSFDestroy(&parentSF);CHKERRQ(ierr); 1373 } 1374 pmesh->useAnchors = mesh->useAnchors; 1375 PetscFunctionReturn(0); 1376 } 1377 1378 PETSC_UNUSED static PetscErrorCode DMPlexDistributeSF(DM dm, PetscSF migrationSF, DM dmParallel) 1379 { 1380 PetscMPIInt rank, size; 1381 MPI_Comm comm; 1382 PetscErrorCode ierr; 1383 1384 PetscFunctionBegin; 1385 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 1386 PetscValidHeaderSpecific(dmParallel, DM_CLASSID, 3); 1387 1388 /* Create point SF for parallel mesh */ 1389 ierr = PetscLogEventBegin(DMPLEX_DistributeSF,dm,0,0,0);CHKERRQ(ierr); 1390 ierr = PetscObjectGetComm((PetscObject)dm, &comm);CHKERRQ(ierr); 1391 ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr); 1392 ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr); 1393 { 1394 const PetscInt *leaves; 1395 PetscSFNode *remotePoints, *rowners, *lowners; 1396 PetscInt numRoots, numLeaves, numGhostPoints = 0, p, gp, *ghostPoints; 1397 PetscInt pStart, pEnd; 1398 1399 ierr = DMPlexGetChart(dmParallel, &pStart, &pEnd);CHKERRQ(ierr); 1400 ierr = PetscSFGetGraph(migrationSF, &numRoots, &numLeaves, &leaves, NULL);CHKERRQ(ierr); 1401 ierr = PetscMalloc2(numRoots,&rowners,numLeaves,&lowners);CHKERRQ(ierr); 1402 for (p=0; p<numRoots; p++) { 1403 rowners[p].rank = -1; 1404 rowners[p].index = -1; 1405 } 1406 ierr = PetscSFBcastBegin(migrationSF, MPIU_2INT, rowners, lowners);CHKERRQ(ierr); 1407 ierr = PetscSFBcastEnd(migrationSF, MPIU_2INT, rowners, lowners);CHKERRQ(ierr); 1408 for (p = 0; p < numLeaves; ++p) { 1409 if (lowners[p].rank < 0 || lowners[p].rank == rank) { /* Either put in a bid or we know we own it */ 1410 lowners[p].rank = rank; 1411 lowners[p].index = leaves ? leaves[p] : p; 1412 } else if (lowners[p].rank >= 0) { /* Point already claimed so flag so that MAXLOC does not listen to us */ 1413 lowners[p].rank = -2; 1414 lowners[p].index = -2; 1415 } 1416 } 1417 for (p=0; p<numRoots; p++) { /* Root must not participate in the rediction, flag so that MAXLOC does not use */ 1418 rowners[p].rank = -3; 1419 rowners[p].index = -3; 1420 } 1421 ierr = PetscSFReduceBegin(migrationSF, MPIU_2INT, lowners, rowners, MPI_MAXLOC);CHKERRQ(ierr); 1422 ierr = PetscSFReduceEnd(migrationSF, MPIU_2INT, lowners, rowners, MPI_MAXLOC);CHKERRQ(ierr); 1423 ierr = PetscSFBcastBegin(migrationSF, MPIU_2INT, rowners, lowners);CHKERRQ(ierr); 1424 ierr = PetscSFBcastEnd(migrationSF, MPIU_2INT, rowners, lowners);CHKERRQ(ierr); 1425 for (p = 0; p < numLeaves; ++p) { 1426 if (lowners[p].rank < 0 || lowners[p].index < 0) SETERRQ(PETSC_COMM_SELF,PETSC_ERR_PLIB,"Cell partition corrupt: point not claimed"); 1427 if (lowners[p].rank != rank) ++numGhostPoints; 1428 } 1429 ierr = PetscMalloc1(numGhostPoints, &ghostPoints);CHKERRQ(ierr); 1430 ierr = PetscMalloc1(numGhostPoints, &remotePoints);CHKERRQ(ierr); 1431 for (p = 0, gp = 0; p < numLeaves; ++p) { 1432 if (lowners[p].rank != rank) { 1433 ghostPoints[gp] = leaves ? leaves[p] : p; 1434 remotePoints[gp].rank = lowners[p].rank; 1435 remotePoints[gp].index = lowners[p].index; 1436 ++gp; 1437 } 1438 } 1439 ierr = PetscFree2(rowners,lowners);CHKERRQ(ierr); 1440 ierr = PetscSFSetGraph((dmParallel)->sf, pEnd - pStart, numGhostPoints, ghostPoints, PETSC_OWN_POINTER, remotePoints, PETSC_OWN_POINTER);CHKERRQ(ierr); 1441 ierr = PetscSFSetFromOptions((dmParallel)->sf);CHKERRQ(ierr); 1442 } 1443 { 1444 PetscBool useCone, useClosure, useAnchors; 1445 1446 ierr = DMPlexGetAdjacencyUseCone(dm, &useCone);CHKERRQ(ierr); 1447 ierr = DMPlexGetAdjacencyUseClosure(dm, &useClosure);CHKERRQ(ierr); 1448 ierr = DMPlexGetAdjacencyUseAnchors(dm, &useAnchors);CHKERRQ(ierr); 1449 ierr = DMPlexSetAdjacencyUseCone(dmParallel, useCone);CHKERRQ(ierr); 1450 ierr = DMPlexSetAdjacencyUseClosure(dmParallel, useClosure);CHKERRQ(ierr); 1451 ierr = DMPlexSetAdjacencyUseAnchors(dmParallel, useAnchors);CHKERRQ(ierr); 1452 } 1453 ierr = PetscLogEventEnd(DMPLEX_DistributeSF,dm,0,0,0);CHKERRQ(ierr); 1454 PetscFunctionReturn(0); 1455 } 1456 1457 /*@C 1458 DMPlexDerivePointSF - Build a point SF from an SF describing a point migration 1459 1460 Input Parameter: 1461 + dm - The source DMPlex object 1462 . migrationSF - The star forest that describes the parallel point remapping 1463 . ownership - Flag causing a vote to determine point ownership 1464 1465 Output Parameter: 1466 - pointSF - The star forest describing the point overlap in the remapped DM 1467 1468 Level: developer 1469 1470 .seealso: DMPlexDistribute(), DMPlexDistributeOverlap() 1471 @*/ 1472 PetscErrorCode DMPlexCreatePointSF(DM dm, PetscSF migrationSF, PetscBool ownership, PetscSF *pointSF) 1473 { 1474 DM_Plex *mesh = (DM_Plex *) dm->data; 1475 PetscMPIInt rank, size; 1476 PetscInt p, nroots, nleaves, idx, npointLeaves; 1477 PetscInt *pointLocal; 1478 const PetscInt *leaves; 1479 const PetscSFNode *roots; 1480 PetscSFNode *rootNodes, *leafNodes, *pointRemote; 1481 Vec shifts; 1482 const PetscInt numShifts = 37; /* TODO Use larger prime */ 1483 const PetscScalar *shift = NULL; 1484 const PetscBool shiftDebug = PETSC_FALSE; 1485 PetscErrorCode ierr; 1486 1487 PetscFunctionBegin; 1488 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 1489 ierr = MPI_Comm_rank(PetscObjectComm((PetscObject) dm), &rank);CHKERRQ(ierr); 1490 ierr = MPI_Comm_size(PetscObjectComm((PetscObject) dm), &size);CHKERRQ(ierr); 1491 1492 ierr = PetscSFGetGraph(migrationSF, &nroots, &nleaves, &leaves, &roots);CHKERRQ(ierr); 1493 ierr = PetscMalloc2(nroots, &rootNodes, nleaves, &leafNodes);CHKERRQ(ierr); 1494 if (ownership) { 1495 /* If balancing, we compute a random cyclic shift of the rank for each remote point. That way, the max will evenly distribute among ranks. */ 1496 if (mesh->partitionBalance) { 1497 PetscRandom r; 1498 1499 ierr = PetscRandomCreate(PETSC_COMM_SELF, &r);CHKERRQ(ierr); 1500 ierr = PetscRandomSetInterval(r, 0, 17*size);CHKERRQ(ierr); 1501 ierr = VecCreate(PETSC_COMM_SELF, &shifts);CHKERRQ(ierr); 1502 ierr = VecSetSizes(shifts, numShifts, numShifts);CHKERRQ(ierr); 1503 ierr = VecSetType(shifts, VECSTANDARD);CHKERRQ(ierr); 1504 ierr = VecSetRandom(shifts, r);CHKERRQ(ierr); 1505 ierr = PetscRandomDestroy(&r);CHKERRQ(ierr); 1506 ierr = VecGetArrayRead(shifts, &shift);CHKERRQ(ierr); 1507 } 1508 1509 /* Point ownership vote: Process with highest rank owns shared points */ 1510 for (p = 0; p < nleaves; ++p) { 1511 if (shiftDebug) { 1512 ierr = PetscSynchronizedPrintf(PetscObjectComm((PetscObject) dm), "[%d] Point %D RemotePoint %D Shift %D MyRank %D\n", rank, leaves ? leaves[p] : p, roots[p].index, (PetscInt) PetscRealPart(shift[roots[p].index%numShifts]), (rank + (shift ? (PetscInt) PetscRealPart(shift[roots[p].index%numShifts]) : 0))%size);CHKERRQ(ierr); 1513 } 1514 /* Either put in a bid or we know we own it */ 1515 leafNodes[p].rank = (rank + (shift ? (PetscInt) PetscRealPart(shift[roots[p].index%numShifts]) : 0))%size; 1516 leafNodes[p].index = p; 1517 } 1518 for (p = 0; p < nroots; p++) { 1519 /* Root must not participate in the reduction, flag so that MAXLOC does not use */ 1520 rootNodes[p].rank = -3; 1521 rootNodes[p].index = -3; 1522 } 1523 ierr = PetscSFReduceBegin(migrationSF, MPIU_2INT, leafNodes, rootNodes, MPI_MAXLOC);CHKERRQ(ierr); 1524 ierr = PetscSFReduceEnd(migrationSF, MPIU_2INT, leafNodes, rootNodes, MPI_MAXLOC);CHKERRQ(ierr); 1525 } else { 1526 for (p = 0; p < nroots; p++) { 1527 rootNodes[p].index = -1; 1528 rootNodes[p].rank = rank; 1529 }; 1530 for (p = 0; p < nleaves; p++) { 1531 /* Write new local id into old location */ 1532 if (roots[p].rank == rank) { 1533 rootNodes[roots[p].index].index = leaves ? leaves[p] : p; 1534 } 1535 } 1536 } 1537 ierr = PetscSFBcastBegin(migrationSF, MPIU_2INT, rootNodes, leafNodes);CHKERRQ(ierr); 1538 ierr = PetscSFBcastEnd(migrationSF, MPIU_2INT, rootNodes, leafNodes);CHKERRQ(ierr); 1539 1540 for (npointLeaves = 0, p = 0; p < nleaves; p++) { 1541 if (shiftDebug) { 1542 ierr = PetscSynchronizedPrintf(PetscObjectComm((PetscObject) dm), "[%d] Root %D, Rank %D MyRank %D\n", rank, roots[p].index, leafNodes[p].rank, (rank + (shift ? (PetscInt) PetscRealPart(shift[roots[p].index%numShifts]) : 0))%size);CHKERRQ(ierr); 1543 } 1544 if (leafNodes[p].rank != (rank + (shift ? (PetscInt) PetscRealPart(shift[roots[p].index%numShifts]) : 0))%size) npointLeaves++; 1545 } 1546 ierr = PetscMalloc1(npointLeaves, &pointLocal);CHKERRQ(ierr); 1547 ierr = PetscMalloc1(npointLeaves, &pointRemote);CHKERRQ(ierr); 1548 for (idx = 0, p = 0; p < nleaves; p++) { 1549 if (leafNodes[p].rank != (rank + (shift ? (PetscInt) PetscRealPart(shift[roots[p].index%numShifts]) : 0))%size) { 1550 pointLocal[idx] = p; 1551 pointRemote[idx] = leafNodes[p]; 1552 idx++; 1553 } 1554 } 1555 if (shift) { 1556 ierr = VecRestoreArrayRead(shifts, &shift);CHKERRQ(ierr); 1557 ierr = VecDestroy(&shifts);CHKERRQ(ierr); 1558 } 1559 if (shiftDebug) {ierr = PetscSynchronizedFlush(PetscObjectComm((PetscObject) dm), PETSC_STDOUT);CHKERRQ(ierr);} 1560 ierr = PetscSFCreate(PetscObjectComm((PetscObject) dm), pointSF);CHKERRQ(ierr); 1561 ierr = PetscSFSetFromOptions(*pointSF);CHKERRQ(ierr); 1562 ierr = PetscSFSetGraph(*pointSF, nleaves, npointLeaves, pointLocal, PETSC_OWN_POINTER, pointRemote, PETSC_OWN_POINTER);CHKERRQ(ierr); 1563 ierr = PetscFree2(rootNodes, leafNodes);CHKERRQ(ierr); 1564 PetscFunctionReturn(0); 1565 } 1566 1567 /*@C 1568 DMPlexMigrate - Migrates internal DM data over the supplied star forest 1569 1570 Input Parameter: 1571 + dm - The source DMPlex object 1572 . sf - The star forest communication context describing the migration pattern 1573 1574 Output Parameter: 1575 - targetDM - The target DMPlex object 1576 1577 Level: intermediate 1578 1579 .seealso: DMPlexDistribute(), DMPlexDistributeOverlap() 1580 @*/ 1581 PetscErrorCode DMPlexMigrate(DM dm, PetscSF sf, DM targetDM) 1582 { 1583 MPI_Comm comm; 1584 PetscInt dim, cdim, nroots; 1585 PetscSF sfPoint; 1586 ISLocalToGlobalMapping ltogMigration; 1587 ISLocalToGlobalMapping ltogOriginal = NULL; 1588 PetscBool flg; 1589 PetscErrorCode ierr; 1590 1591 PetscFunctionBegin; 1592 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 1593 ierr = PetscLogEventBegin(DMPLEX_Migrate, dm, 0, 0, 0);CHKERRQ(ierr); 1594 ierr = PetscObjectGetComm((PetscObject) dm, &comm);CHKERRQ(ierr); 1595 ierr = DMGetDimension(dm, &dim);CHKERRQ(ierr); 1596 ierr = DMSetDimension(targetDM, dim);CHKERRQ(ierr); 1597 ierr = DMGetCoordinateDim(dm, &cdim);CHKERRQ(ierr); 1598 ierr = DMSetCoordinateDim(targetDM, cdim);CHKERRQ(ierr); 1599 1600 /* Check for a one-to-all distribution pattern */ 1601 ierr = DMGetPointSF(dm, &sfPoint);CHKERRQ(ierr); 1602 ierr = PetscSFGetGraph(sfPoint, &nroots, NULL, NULL, NULL);CHKERRQ(ierr); 1603 if (nroots >= 0) { 1604 IS isOriginal; 1605 PetscInt n, size, nleaves; 1606 PetscInt *numbering_orig, *numbering_new; 1607 /* Get the original point numbering */ 1608 ierr = DMPlexCreatePointNumbering(dm, &isOriginal);CHKERRQ(ierr); 1609 ierr = ISLocalToGlobalMappingCreateIS(isOriginal, <ogOriginal);CHKERRQ(ierr); 1610 ierr = ISLocalToGlobalMappingGetSize(ltogOriginal, &size);CHKERRQ(ierr); 1611 ierr = ISLocalToGlobalMappingGetBlockIndices(ltogOriginal, (const PetscInt**)&numbering_orig);CHKERRQ(ierr); 1612 /* Convert to positive global numbers */ 1613 for (n=0; n<size; n++) {if (numbering_orig[n] < 0) numbering_orig[n] = -(numbering_orig[n]+1);} 1614 /* Derive the new local-to-global mapping from the old one */ 1615 ierr = PetscSFGetGraph(sf, NULL, &nleaves, NULL, NULL);CHKERRQ(ierr); 1616 ierr = PetscMalloc1(nleaves, &numbering_new);CHKERRQ(ierr); 1617 ierr = PetscSFBcastBegin(sf, MPIU_INT, (PetscInt *) numbering_orig, numbering_new);CHKERRQ(ierr); 1618 ierr = PetscSFBcastEnd(sf, MPIU_INT, (PetscInt *) numbering_orig, numbering_new);CHKERRQ(ierr); 1619 ierr = ISLocalToGlobalMappingCreate(comm, 1, nleaves, (const PetscInt*) numbering_new, PETSC_OWN_POINTER, <ogMigration);CHKERRQ(ierr); 1620 ierr = ISLocalToGlobalMappingRestoreIndices(ltogOriginal, (const PetscInt**)&numbering_orig);CHKERRQ(ierr); 1621 ierr = ISDestroy(&isOriginal);CHKERRQ(ierr); 1622 } else { 1623 /* One-to-all distribution pattern: We can derive LToG from SF */ 1624 ierr = ISLocalToGlobalMappingCreateSF(sf, 0, <ogMigration);CHKERRQ(ierr); 1625 } 1626 ierr = PetscOptionsHasName(((PetscObject) dm)->options,((PetscObject) dm)->prefix, "-partition_view", &flg);CHKERRQ(ierr); 1627 if (flg) { 1628 ierr = PetscPrintf(comm, "Point renumbering for DM migration:\n");CHKERRQ(ierr); 1629 ierr = ISLocalToGlobalMappingView(ltogMigration, NULL);CHKERRQ(ierr); 1630 } 1631 /* Migrate DM data to target DM */ 1632 ierr = DMPlexDistributeCones(dm, sf, ltogOriginal, ltogMigration, targetDM);CHKERRQ(ierr); 1633 ierr = DMPlexDistributeLabels(dm, sf, targetDM);CHKERRQ(ierr); 1634 ierr = DMPlexDistributeCoordinates(dm, sf, targetDM);CHKERRQ(ierr); 1635 ierr = DMPlexDistributeSetupHybrid(dm, sf, ltogMigration, targetDM);CHKERRQ(ierr); 1636 ierr = DMPlexDistributeSetupTree(dm, sf, ltogOriginal, ltogMigration, targetDM);CHKERRQ(ierr); 1637 ierr = ISLocalToGlobalMappingDestroy(<ogOriginal);CHKERRQ(ierr); 1638 ierr = ISLocalToGlobalMappingDestroy(<ogMigration);CHKERRQ(ierr); 1639 ierr = PetscLogEventEnd(DMPLEX_Migrate, dm, 0, 0, 0);CHKERRQ(ierr); 1640 PetscFunctionReturn(0); 1641 } 1642 1643 /*@C 1644 DMPlexDistribute - Distributes the mesh and any associated sections. 1645 1646 Not Collective 1647 1648 Input Parameter: 1649 + dm - The original DMPlex object 1650 - overlap - The overlap of partitions, 0 is the default 1651 1652 Output Parameter: 1653 + sf - The PetscSF used for point distribution 1654 - parallelMesh - The distributed DMPlex object, or NULL 1655 1656 Note: If the mesh was not distributed, the return value is NULL. 1657 1658 The user can control the definition of adjacency for the mesh using DMPlexSetAdjacencyUseCone() and 1659 DMPlexSetAdjacencyUseClosure(). They should choose the combination appropriate for the function 1660 representation on the mesh. 1661 1662 Level: intermediate 1663 1664 .keywords: mesh, elements 1665 .seealso: DMPlexCreate(), DMPlexDistributeByFace(), DMPlexSetAdjacencyUseCone(), DMPlexSetAdjacencyUseClosure() 1666 @*/ 1667 PetscErrorCode DMPlexDistribute(DM dm, PetscInt overlap, PetscSF *sf, DM *dmParallel) 1668 { 1669 MPI_Comm comm; 1670 PetscPartitioner partitioner; 1671 IS cellPart; 1672 PetscSection cellPartSection; 1673 DM dmCoord; 1674 DMLabel lblPartition, lblMigration; 1675 PetscSF sfProcess, sfMigration, sfStratified, sfPoint; 1676 PetscBool flg; 1677 PetscMPIInt rank, size, p; 1678 PetscErrorCode ierr; 1679 1680 PetscFunctionBegin; 1681 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 1682 if (sf) PetscValidPointer(sf,4); 1683 PetscValidPointer(dmParallel,5); 1684 1685 if (sf) *sf = NULL; 1686 *dmParallel = NULL; 1687 ierr = PetscObjectGetComm((PetscObject)dm,&comm);CHKERRQ(ierr); 1688 ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr); 1689 ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr); 1690 if (size == 1) PetscFunctionReturn(0); 1691 1692 ierr = PetscLogEventBegin(DMPLEX_Distribute,dm,0,0,0);CHKERRQ(ierr); 1693 /* Create cell partition */ 1694 ierr = PetscLogEventBegin(DMPLEX_Partition,dm,0,0,0);CHKERRQ(ierr); 1695 ierr = PetscSectionCreate(comm, &cellPartSection);CHKERRQ(ierr); 1696 ierr = DMPlexGetPartitioner(dm, &partitioner);CHKERRQ(ierr); 1697 ierr = PetscPartitionerPartition(partitioner, dm, cellPartSection, &cellPart);CHKERRQ(ierr); 1698 { 1699 /* Convert partition to DMLabel */ 1700 PetscInt proc, pStart, pEnd, npoints, poffset; 1701 const PetscInt *points; 1702 ierr = DMLabelCreate("Point Partition", &lblPartition);CHKERRQ(ierr); 1703 ierr = ISGetIndices(cellPart, &points);CHKERRQ(ierr); 1704 ierr = PetscSectionGetChart(cellPartSection, &pStart, &pEnd);CHKERRQ(ierr); 1705 for (proc = pStart; proc < pEnd; proc++) { 1706 ierr = PetscSectionGetDof(cellPartSection, proc, &npoints);CHKERRQ(ierr); 1707 ierr = PetscSectionGetOffset(cellPartSection, proc, &poffset);CHKERRQ(ierr); 1708 for (p = poffset; p < poffset+npoints; p++) { 1709 ierr = DMLabelSetValue(lblPartition, points[p], proc);CHKERRQ(ierr); 1710 } 1711 } 1712 ierr = ISRestoreIndices(cellPart, &points);CHKERRQ(ierr); 1713 } 1714 ierr = DMPlexPartitionLabelClosure(dm, lblPartition);CHKERRQ(ierr); 1715 { 1716 /* Build a global process SF */ 1717 PetscSFNode *remoteProc; 1718 ierr = PetscMalloc1(size, &remoteProc);CHKERRQ(ierr); 1719 for (p = 0; p < size; ++p) { 1720 remoteProc[p].rank = p; 1721 remoteProc[p].index = rank; 1722 } 1723 ierr = PetscSFCreate(comm, &sfProcess);CHKERRQ(ierr); 1724 ierr = PetscObjectSetName((PetscObject) sfProcess, "Process SF");CHKERRQ(ierr); 1725 ierr = PetscSFSetGraph(sfProcess, size, size, NULL, PETSC_OWN_POINTER, remoteProc, PETSC_OWN_POINTER);CHKERRQ(ierr); 1726 } 1727 ierr = DMLabelCreate("Point migration", &lblMigration);CHKERRQ(ierr); 1728 ierr = DMPlexPartitionLabelInvert(dm, lblPartition, sfProcess, lblMigration);CHKERRQ(ierr); 1729 ierr = DMPlexPartitionLabelCreateSF(dm, lblMigration, &sfMigration);CHKERRQ(ierr); 1730 /* Stratify the SF in case we are migrating an already parallel plex */ 1731 ierr = DMPlexStratifyMigrationSF(dm, sfMigration, &sfStratified);CHKERRQ(ierr); 1732 ierr = PetscSFDestroy(&sfMigration);CHKERRQ(ierr); 1733 sfMigration = sfStratified; 1734 ierr = PetscLogEventEnd(DMPLEX_Partition,dm,0,0,0);CHKERRQ(ierr); 1735 ierr = PetscOptionsHasName(((PetscObject) dm)->options,((PetscObject) dm)->prefix, "-partition_view", &flg);CHKERRQ(ierr); 1736 if (flg) { 1737 ierr = DMLabelView(lblPartition, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 1738 ierr = PetscSFView(sfMigration, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); 1739 } 1740 1741 /* Create non-overlapping parallel DM and migrate internal data */ 1742 ierr = DMPlexCreate(comm, dmParallel);CHKERRQ(ierr); 1743 ierr = PetscObjectSetName((PetscObject) *dmParallel, "Parallel Mesh");CHKERRQ(ierr); 1744 ierr = DMPlexMigrate(dm, sfMigration, *dmParallel);CHKERRQ(ierr); 1745 1746 /* Build the point SF without overlap */ 1747 ((DM_Plex*) (*dmParallel)->data)->partitionBalance = ((DM_Plex*) dm->data)->partitionBalance; 1748 ierr = DMPlexCreatePointSF(*dmParallel, sfMigration, PETSC_TRUE, &sfPoint);CHKERRQ(ierr); 1749 ierr = DMSetPointSF(*dmParallel, sfPoint);CHKERRQ(ierr); 1750 ierr = DMGetCoordinateDM(*dmParallel, &dmCoord);CHKERRQ(ierr); 1751 if (dmCoord) {ierr = DMSetPointSF(dmCoord, sfPoint);CHKERRQ(ierr);} 1752 if (flg) {ierr = PetscSFView(sfPoint, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr);} 1753 1754 if (overlap > 0) { 1755 DM dmOverlap; 1756 PetscInt nroots, nleaves; 1757 PetscSFNode *newRemote; 1758 const PetscSFNode *oldRemote; 1759 PetscSF sfOverlap, sfOverlapPoint; 1760 /* Add the partition overlap to the distributed DM */ 1761 ierr = DMPlexDistributeOverlap(*dmParallel, overlap, &sfOverlap, &dmOverlap);CHKERRQ(ierr); 1762 ierr = DMDestroy(dmParallel);CHKERRQ(ierr); 1763 *dmParallel = dmOverlap; 1764 if (flg) { 1765 ierr = PetscPrintf(comm, "Overlap Migration SF:\n");CHKERRQ(ierr); 1766 ierr = PetscSFView(sfOverlap, NULL);CHKERRQ(ierr); 1767 } 1768 1769 /* Re-map the migration SF to establish the full migration pattern */ 1770 ierr = PetscSFGetGraph(sfMigration, &nroots, NULL, NULL, &oldRemote);CHKERRQ(ierr); 1771 ierr = PetscSFGetGraph(sfOverlap, NULL, &nleaves, NULL, NULL);CHKERRQ(ierr); 1772 ierr = PetscMalloc1(nleaves, &newRemote);CHKERRQ(ierr); 1773 ierr = PetscSFBcastBegin(sfOverlap, MPIU_2INT, oldRemote, newRemote);CHKERRQ(ierr); 1774 ierr = PetscSFBcastEnd(sfOverlap, MPIU_2INT, oldRemote, newRemote);CHKERRQ(ierr); 1775 ierr = PetscSFCreate(comm, &sfOverlapPoint);CHKERRQ(ierr); 1776 ierr = PetscSFSetGraph(sfOverlapPoint, nroots, nleaves, NULL, PETSC_OWN_POINTER, newRemote, PETSC_OWN_POINTER);CHKERRQ(ierr); 1777 ierr = PetscSFDestroy(&sfOverlap);CHKERRQ(ierr); 1778 ierr = PetscSFDestroy(&sfMigration);CHKERRQ(ierr); 1779 sfMigration = sfOverlapPoint; 1780 } 1781 /* Cleanup Partition */ 1782 ierr = PetscSFDestroy(&sfProcess);CHKERRQ(ierr); 1783 ierr = DMLabelDestroy(&lblPartition);CHKERRQ(ierr); 1784 ierr = DMLabelDestroy(&lblMigration);CHKERRQ(ierr); 1785 ierr = PetscSectionDestroy(&cellPartSection);CHKERRQ(ierr); 1786 ierr = ISDestroy(&cellPart);CHKERRQ(ierr); 1787 /* Copy BC */ 1788 ierr = DMCopyBoundary(dm, *dmParallel);CHKERRQ(ierr); 1789 /* Create sfNatural */ 1790 if (dm->useNatural) { 1791 PetscSection section; 1792 1793 ierr = DMGetDefaultSection(dm, §ion);CHKERRQ(ierr); 1794 ierr = DMPlexCreateGlobalToNaturalSF(*dmParallel, section, sfMigration, &(*dmParallel)->sfNatural);CHKERRQ(ierr); 1795 ierr = DMSetUseNatural(*dmParallel, PETSC_TRUE);CHKERRQ(ierr); 1796 } 1797 /* Cleanup */ 1798 if (sf) {*sf = sfMigration;} 1799 else {ierr = PetscSFDestroy(&sfMigration);CHKERRQ(ierr);} 1800 ierr = PetscSFDestroy(&sfPoint);CHKERRQ(ierr); 1801 ierr = PetscLogEventEnd(DMPLEX_Distribute,dm,0,0,0);CHKERRQ(ierr); 1802 PetscFunctionReturn(0); 1803 } 1804 1805 /*@C 1806 DMPlexDistributeOverlap - Add partition overlap to a distributed non-overlapping DM. 1807 1808 Not Collective 1809 1810 Input Parameter: 1811 + dm - The non-overlapping distrbuted DMPlex object 1812 - overlap - The overlap of partitions 1813 1814 Output Parameter: 1815 + sf - The PetscSF used for point distribution 1816 - dmOverlap - The overlapping distributed DMPlex object, or NULL 1817 1818 Note: If the mesh was not distributed, the return value is NULL. 1819 1820 The user can control the definition of adjacency for the mesh using DMPlexGetAdjacencyUseCone() and 1821 DMPlexSetAdjacencyUseClosure(). They should choose the combination appropriate for the function 1822 representation on the mesh. 1823 1824 Level: intermediate 1825 1826 .keywords: mesh, elements 1827 .seealso: DMPlexCreate(), DMPlexDistributeByFace(), DMPlexSetAdjacencyUseCone(), DMPlexSetAdjacencyUseClosure() 1828 @*/ 1829 PetscErrorCode DMPlexDistributeOverlap(DM dm, PetscInt overlap, PetscSF *sf, DM *dmOverlap) 1830 { 1831 MPI_Comm comm; 1832 PetscMPIInt size, rank; 1833 PetscSection rootSection, leafSection; 1834 IS rootrank, leafrank; 1835 DM dmCoord; 1836 DMLabel lblOverlap; 1837 PetscSF sfOverlap, sfStratified, sfPoint; 1838 PetscErrorCode ierr; 1839 1840 PetscFunctionBegin; 1841 PetscValidHeaderSpecific(dm, DM_CLASSID, 1); 1842 if (sf) PetscValidPointer(sf, 3); 1843 PetscValidPointer(dmOverlap, 4); 1844 1845 if (sf) *sf = NULL; 1846 *dmOverlap = NULL; 1847 ierr = PetscObjectGetComm((PetscObject)dm,&comm);CHKERRQ(ierr); 1848 ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr); 1849 ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr); 1850 if (size == 1) PetscFunctionReturn(0); 1851 1852 ierr = PetscLogEventBegin(DMPLEX_DistributeOverlap, dm, 0, 0, 0);CHKERRQ(ierr); 1853 /* Compute point overlap with neighbouring processes on the distributed DM */ 1854 ierr = PetscLogEventBegin(DMPLEX_Partition,dm,0,0,0);CHKERRQ(ierr); 1855 ierr = PetscSectionCreate(comm, &rootSection);CHKERRQ(ierr); 1856 ierr = PetscSectionCreate(comm, &leafSection);CHKERRQ(ierr); 1857 ierr = DMPlexDistributeOwnership(dm, rootSection, &rootrank, leafSection, &leafrank);CHKERRQ(ierr); 1858 ierr = DMPlexCreateOverlap(dm, overlap, rootSection, rootrank, leafSection, leafrank, &lblOverlap);CHKERRQ(ierr); 1859 /* Convert overlap label to stratified migration SF */ 1860 ierr = DMPlexPartitionLabelCreateSF(dm, lblOverlap, &sfOverlap);CHKERRQ(ierr); 1861 ierr = DMPlexStratifyMigrationSF(dm, sfOverlap, &sfStratified);CHKERRQ(ierr); 1862 ierr = PetscSFDestroy(&sfOverlap);CHKERRQ(ierr); 1863 sfOverlap = sfStratified; 1864 ierr = PetscObjectSetName((PetscObject) sfOverlap, "Overlap SF");CHKERRQ(ierr); 1865 ierr = PetscSFSetFromOptions(sfOverlap);CHKERRQ(ierr); 1866 1867 ierr = PetscSectionDestroy(&rootSection);CHKERRQ(ierr); 1868 ierr = PetscSectionDestroy(&leafSection);CHKERRQ(ierr); 1869 ierr = ISDestroy(&rootrank);CHKERRQ(ierr); 1870 ierr = ISDestroy(&leafrank);CHKERRQ(ierr); 1871 ierr = PetscLogEventEnd(DMPLEX_Partition,dm,0,0,0);CHKERRQ(ierr); 1872 1873 /* Build the overlapping DM */ 1874 ierr = DMPlexCreate(comm, dmOverlap);CHKERRQ(ierr); 1875 ierr = PetscObjectSetName((PetscObject) *dmOverlap, "Parallel Mesh");CHKERRQ(ierr); 1876 ierr = DMPlexMigrate(dm, sfOverlap, *dmOverlap);CHKERRQ(ierr); 1877 /* Build the new point SF */ 1878 ierr = DMPlexCreatePointSF(*dmOverlap, sfOverlap, PETSC_FALSE, &sfPoint);CHKERRQ(ierr); 1879 ierr = DMSetPointSF(*dmOverlap, sfPoint);CHKERRQ(ierr); 1880 ierr = DMGetCoordinateDM(*dmOverlap, &dmCoord);CHKERRQ(ierr); 1881 if (dmCoord) {ierr = DMSetPointSF(dmCoord, sfPoint);CHKERRQ(ierr);} 1882 ierr = PetscSFDestroy(&sfPoint);CHKERRQ(ierr); 1883 /* Cleanup overlap partition */ 1884 ierr = DMLabelDestroy(&lblOverlap);CHKERRQ(ierr); 1885 if (sf) *sf = sfOverlap; 1886 else {ierr = PetscSFDestroy(&sfOverlap);CHKERRQ(ierr);} 1887 ierr = PetscLogEventEnd(DMPLEX_DistributeOverlap, dm, 0, 0, 0);CHKERRQ(ierr); 1888 PetscFunctionReturn(0); 1889 } 1890 1891 /*@C 1892 DMPlexGetGatherDM - Get a copy of the DMPlex that gathers all points on the 1893 root process of the original's communicator. 1894 1895 Input Parameters: 1896 . dm - the original DMPlex object 1897 1898 Output Parameters: 1899 . gatherMesh - the gathered DM object, or NULL 1900 1901 Level: intermediate 1902 1903 .keywords: mesh 1904 .seealso: DMPlexDistribute(), DMPlexGetRedundantDM() 1905 @*/ 1906 PetscErrorCode DMPlexGetGatherDM(DM dm, DM *gatherMesh) 1907 { 1908 MPI_Comm comm; 1909 PetscMPIInt size; 1910 PetscPartitioner oldPart, gatherPart; 1911 PetscErrorCode ierr; 1912 1913 PetscFunctionBegin; 1914 PetscValidHeaderSpecific(dm,DM_CLASSID,1); 1915 PetscValidPointer(gatherMesh,2); 1916 *gatherMesh = NULL; 1917 comm = PetscObjectComm((PetscObject)dm); 1918 ierr = MPI_Comm_size(comm,&size);CHKERRQ(ierr); 1919 if (size == 1) PetscFunctionReturn(0); 1920 ierr = DMPlexGetPartitioner(dm,&oldPart);CHKERRQ(ierr); 1921 ierr = PetscObjectReference((PetscObject)oldPart);CHKERRQ(ierr); 1922 ierr = PetscPartitionerCreate(comm,&gatherPart);CHKERRQ(ierr); 1923 ierr = PetscPartitionerSetType(gatherPart,PETSCPARTITIONERGATHER);CHKERRQ(ierr); 1924 ierr = DMPlexSetPartitioner(dm,gatherPart);CHKERRQ(ierr); 1925 ierr = DMPlexDistribute(dm,0,NULL,gatherMesh);CHKERRQ(ierr); 1926 ierr = DMPlexSetPartitioner(dm,oldPart);CHKERRQ(ierr); 1927 ierr = PetscPartitionerDestroy(&gatherPart);CHKERRQ(ierr); 1928 ierr = PetscPartitionerDestroy(&oldPart);CHKERRQ(ierr); 1929 PetscFunctionReturn(0); 1930 } 1931 1932 /*@C 1933 DMPlexGetRedundantDM - Get a copy of the DMPlex that is completely copied on each process. 1934 1935 Input Parameters: 1936 . dm - the original DMPlex object 1937 1938 Output Parameters: 1939 . redundantMesh - the redundant DM object, or NULL 1940 1941 Level: intermediate 1942 1943 .keywords: mesh 1944 .seealso: DMPlexDistribute(), DMPlexGetGatherDM() 1945 @*/ 1946 PetscErrorCode DMPlexGetRedundantDM(DM dm, DM *redundantMesh) 1947 { 1948 MPI_Comm comm; 1949 PetscMPIInt size, rank; 1950 PetscInt pStart, pEnd, p; 1951 PetscInt numPoints = -1; 1952 PetscSF migrationSF, sfPoint; 1953 DM gatherDM, dmCoord; 1954 PetscSFNode *points; 1955 PetscErrorCode ierr; 1956 1957 PetscFunctionBegin; 1958 PetscValidHeaderSpecific(dm,DM_CLASSID,1); 1959 PetscValidPointer(redundantMesh,2); 1960 *redundantMesh = NULL; 1961 comm = PetscObjectComm((PetscObject)dm); 1962 ierr = MPI_Comm_size(comm,&size);CHKERRQ(ierr); 1963 if (size == 1) { 1964 ierr = PetscObjectReference((PetscObject) dm);CHKERRQ(ierr); 1965 *redundantMesh = dm; 1966 PetscFunctionReturn(0); 1967 } 1968 ierr = DMPlexGetGatherDM(dm,&gatherDM);CHKERRQ(ierr); 1969 if (!gatherDM) PetscFunctionReturn(0); 1970 ierr = MPI_Comm_rank(comm,&rank);CHKERRQ(ierr); 1971 ierr = DMPlexGetChart(gatherDM,&pStart,&pEnd);CHKERRQ(ierr); 1972 numPoints = pEnd - pStart; 1973 ierr = MPI_Bcast(&numPoints,1,MPIU_INT,0,comm);CHKERRQ(ierr); 1974 ierr = PetscMalloc1(numPoints,&points);CHKERRQ(ierr); 1975 ierr = PetscSFCreate(comm,&migrationSF);CHKERRQ(ierr); 1976 for (p = 0; p < numPoints; p++) { 1977 points[p].index = p; 1978 points[p].rank = 0; 1979 } 1980 ierr = PetscSFSetGraph(migrationSF,pEnd-pStart,numPoints,NULL,PETSC_OWN_POINTER,points,PETSC_OWN_POINTER);CHKERRQ(ierr); 1981 ierr = DMPlexCreate(comm, redundantMesh);CHKERRQ(ierr); 1982 ierr = PetscObjectSetName((PetscObject) *redundantMesh, "Redundant Mesh");CHKERRQ(ierr); 1983 ierr = DMPlexMigrate(gatherDM, migrationSF, *redundantMesh);CHKERRQ(ierr); 1984 ierr = DMPlexCreatePointSF(*redundantMesh, migrationSF, PETSC_FALSE, &sfPoint);CHKERRQ(ierr); 1985 ierr = DMSetPointSF(*redundantMesh, sfPoint);CHKERRQ(ierr); 1986 ierr = DMGetCoordinateDM(*redundantMesh, &dmCoord);CHKERRQ(ierr); 1987 if (dmCoord) {ierr = DMSetPointSF(dmCoord, sfPoint);CHKERRQ(ierr);} 1988 ierr = PetscSFDestroy(&sfPoint);CHKERRQ(ierr); 1989 ierr = PetscSFDestroy(&migrationSF);CHKERRQ(ierr); 1990 ierr = DMDestroy(&gatherDM);CHKERRQ(ierr); 1991 PetscFunctionReturn(0); 1992 } 1993