/*@ DMPlexReverseCell - Give a mesh cell the opposite orientation Input Parameters: + dm - The DM - cell - The cell number Note: The modification of the DM is done in-place. Level: advanced .seealso: DMPlexOrient(), DMCreate(), DMPLEX @*/ PetscErrorCode DMPlexReverseCell(DM dm, PetscInt cell) { /* Note that the reverse orientation ro of a face with orientation o is: ro = o >= 0 ? -(faceSize - o) : faceSize + o where faceSize is the size of the cone for the face. */ const PetscInt *cone, *coneO, *support; PetscInt *revcone, *revconeO; PetscInt maxConeSize, coneSize, supportSize, faceSize, cp, sp; PetscErrorCode ierr; PetscFunctionBegin; ierr = DMPlexGetMaxSizes(dm, &maxConeSize, NULL);CHKERRQ(ierr); ierr = DMGetWorkArray(dm, maxConeSize, MPIU_INT, &revcone);CHKERRQ(ierr); ierr = DMGetWorkArray(dm, maxConeSize, MPIU_INT, &revconeO);CHKERRQ(ierr); /* Reverse cone, and reverse orientations of faces */ ierr = DMPlexGetConeSize(dm, cell, &coneSize);CHKERRQ(ierr); ierr = DMPlexGetCone(dm, cell, &cone);CHKERRQ(ierr); ierr = DMPlexGetConeOrientation(dm, cell, &coneO);CHKERRQ(ierr); for (cp = 0; cp < coneSize; ++cp) { const PetscInt rcp = coneSize-cp-1; ierr = DMPlexGetConeSize(dm, cone[rcp], &faceSize);CHKERRQ(ierr); revcone[cp] = cone[rcp]; revconeO[cp] = coneO[rcp] >= 0 ? -(faceSize-coneO[rcp]) : faceSize+coneO[rcp]; } ierr = DMPlexSetCone(dm, cell, revcone);CHKERRQ(ierr); ierr = DMPlexSetConeOrientation(dm, cell, revconeO);CHKERRQ(ierr); /* Reverse orientation of this cell in the support hypercells */ faceSize = coneSize; ierr = DMPlexGetSupportSize(dm, cell, &supportSize);CHKERRQ(ierr); ierr = DMPlexGetSupport(dm, cell, &support);CHKERRQ(ierr); for (sp = 0; sp < supportSize; ++sp) { ierr = DMPlexGetConeSize(dm, support[sp], &coneSize);CHKERRQ(ierr); ierr = DMPlexGetCone(dm, support[sp], &cone);CHKERRQ(ierr); ierr = DMPlexGetConeOrientation(dm, support[sp], &coneO);CHKERRQ(ierr); for (cp = 0; cp < coneSize; ++cp) { if (cone[cp] != cell) continue; ierr = DMPlexInsertConeOrientation(dm, support[sp], cp, coneO[cp] >= 0 ? -(faceSize-coneO[cp]) : faceSize+coneO[cp]);CHKERRQ(ierr); } } ierr = DMRestoreWorkArray(dm, maxConeSize, MPIU_INT, &revcone);CHKERRQ(ierr); ierr = DMRestoreWorkArray(dm, maxConeSize, MPIU_INT, &revconeO);CHKERRQ(ierr); PetscFunctionReturn(0); }
/* This interpolates faces for cells at some stratum */ static PetscErrorCode DMPlexInterpolateFaces_Internal(DM dm, PetscInt cellDepth, DM idm) { PetscHashIJKL faceTable; PetscInt *pStart, *pEnd; PetscInt cellDim, depth, faceDepth = cellDepth, numPoints = 0, faceSizeAll = 0, face, c, d; PetscErrorCode ierr; PetscFunctionBegin; ierr = DMPlexGetDimension(dm, &cellDim);CHKERRQ(ierr); ierr = DMPlexGetDepth(dm, &depth);CHKERRQ(ierr); ++depth; ++cellDepth; cellDim -= depth - cellDepth; ierr = PetscMalloc2(depth+1,PetscInt,&pStart,depth+1,PetscInt,&pEnd);CHKERRQ(ierr); for (d = depth-1; d >= faceDepth; --d) { ierr = DMPlexGetDepthStratum(dm, d, &pStart[d+1], &pEnd[d+1]);CHKERRQ(ierr); } ierr = DMPlexGetDepthStratum(dm, -1, NULL, &pStart[faceDepth]);CHKERRQ(ierr); pEnd[faceDepth] = pStart[faceDepth]; for (d = faceDepth-1; d >= 0; --d) { ierr = DMPlexGetDepthStratum(dm, d, &pStart[d], &pEnd[d]);CHKERRQ(ierr); } if (pEnd[cellDepth] > pStart[cellDepth]) {ierr = DMPlexGetFaces_Internal(dm, cellDim, pStart[cellDepth], NULL, &faceSizeAll, NULL);CHKERRQ(ierr);} if (faceSizeAll > 4) SETERRQ1(PetscObjectComm((PetscObject) dm), PETSC_ERR_ARG_WRONG, "Do not support interpolation of meshes with faces of %D vertices", faceSizeAll); ierr = PetscHashIJKLCreate(&faceTable);CHKERRQ(ierr); ierr = PetscHashIJKLSetMultivalued(faceTable, PETSC_FALSE);CHKERRQ(ierr); for (c = pStart[cellDepth], face = pStart[faceDepth]; c < pEnd[cellDepth]; ++c) { const PetscInt *cellFaces; PetscInt numCellFaces, faceSize, cf, f; ierr = DMPlexGetFaces_Internal(dm, cellDim, c, &numCellFaces, &faceSize, &cellFaces);CHKERRQ(ierr); if (faceSize != faceSizeAll) SETERRQ3(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Inconsistent face for cell %D of size %D != %D", c, faceSize, faceSizeAll); for (cf = 0; cf < numCellFaces; ++cf) { const PetscInt *cellFace = &cellFaces[cf*faceSize]; PetscHashIJKLKey key; if (faceSize == 2) { key.i = PetscMin(cellFace[0], cellFace[1]); key.j = PetscMax(cellFace[0], cellFace[1]); } else { key.i = cellFace[0]; key.j = cellFace[1]; key.k = cellFace[2]; key.l = faceSize > 3 ? cellFace[3] : 0; ierr = PetscSortInt(faceSize, (PetscInt *) &key); } ierr = PetscHashIJKLGet(faceTable, key, &f);CHKERRQ(ierr); if (f < 0) { ierr = PetscHashIJKLAdd(faceTable, key, face);CHKERRQ(ierr); f = face++; } } } pEnd[faceDepth] = face; ierr = PetscHashIJKLDestroy(&faceTable);CHKERRQ(ierr); /* Count new points */ for (d = 0; d <= depth; ++d) { numPoints += pEnd[d]-pStart[d]; } ierr = DMPlexSetChart(idm, 0, numPoints);CHKERRQ(ierr); /* Set cone sizes */ for (d = 0; d <= depth; ++d) { PetscInt coneSize, p; if (d == faceDepth) { for (p = pStart[d]; p < pEnd[d]; ++p) { /* I see no way to do this if we admit faces of different shapes */ ierr = DMPlexSetConeSize(idm, p, faceSizeAll);CHKERRQ(ierr); } } else if (d == cellDepth) { for (p = pStart[d]; p < pEnd[d]; ++p) { /* Number of cell faces may be different from number of cell vertices*/ ierr = DMPlexGetFaces_Internal(dm, cellDim, p, &coneSize, NULL, NULL);CHKERRQ(ierr); ierr = DMPlexSetConeSize(idm, p, coneSize);CHKERRQ(ierr); } } else { for (p = pStart[d]; p < pEnd[d]; ++p) { ierr = DMPlexGetConeSize(dm, p, &coneSize);CHKERRQ(ierr); ierr = DMPlexSetConeSize(idm, p, coneSize);CHKERRQ(ierr); } } } ierr = DMSetUp(idm);CHKERRQ(ierr); /* Get face cones from subsets of cell vertices */ if (faceSizeAll > 4) SETERRQ1(PetscObjectComm((PetscObject) dm), PETSC_ERR_ARG_WRONG, "Do not support interpolation of meshes with faces of %D vertices", faceSizeAll); ierr = PetscHashIJKLCreate(&faceTable);CHKERRQ(ierr); ierr = PetscHashIJKLSetMultivalued(faceTable, PETSC_FALSE);CHKERRQ(ierr); for (d = depth; d > cellDepth; --d) { const PetscInt *cone; PetscInt p; for (p = pStart[d]; p < pEnd[d]; ++p) { ierr = DMPlexGetCone(dm, p, &cone);CHKERRQ(ierr); ierr = DMPlexSetCone(idm, p, cone);CHKERRQ(ierr); ierr = DMPlexGetConeOrientation(dm, p, &cone);CHKERRQ(ierr); ierr = DMPlexSetConeOrientation(idm, p, cone);CHKERRQ(ierr); } } for (c = pStart[cellDepth], face = pStart[faceDepth]; c < pEnd[cellDepth]; ++c) { const PetscInt *cellFaces; PetscInt numCellFaces, faceSize, cf, f; ierr = DMPlexGetFaces_Internal(dm, cellDim, c, &numCellFaces, &faceSize, &cellFaces);CHKERRQ(ierr); if (faceSize != faceSizeAll) SETERRQ3(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Inconsistent face for cell %D of size %D != %D", c, faceSize, faceSizeAll); for (cf = 0; cf < numCellFaces; ++cf) { const PetscInt *cellFace = &cellFaces[cf*faceSize]; PetscHashIJKLKey key; if (faceSize == 2) { key.i = PetscMin(cellFace[0], cellFace[1]); key.j = PetscMax(cellFace[0], cellFace[1]); } else { key.i = cellFace[0]; key.j = cellFace[1]; key.k = cellFace[2]; key.l = faceSize > 3 ? cellFace[3] : 0; ierr = PetscSortInt(faceSize, (PetscInt *) &key); } ierr = PetscHashIJKLGet(faceTable, key, &f);CHKERRQ(ierr); if (f < 0) { ierr = DMPlexSetCone(idm, face, cellFace);CHKERRQ(ierr); ierr = PetscHashIJKLAdd(faceTable, key, face);CHKERRQ(ierr); f = face++; ierr = DMPlexInsertCone(idm, c, cf, f);CHKERRQ(ierr); } else { const PetscInt *cone; PetscInt coneSize, ornt, i, j; ierr = DMPlexInsertCone(idm, c, cf, f);CHKERRQ(ierr); /* Orient face */ ierr = DMPlexGetConeSize(idm, f, &coneSize);CHKERRQ(ierr); ierr = DMPlexGetCone(idm, f, &cone);CHKERRQ(ierr); if (coneSize != faceSize) SETERRQ3(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Invalid number of face vertices %D for face %D should be %D", coneSize, f, faceSize); /* - First find the initial vertex */ for (i = 0; i < faceSize; ++i) if (cellFace[0] == cone[i]) break; /* - Try forward comparison */ for (j = 0; j < faceSize; ++j) if (cellFace[j] != cone[(i+j)%faceSize]) break; if (j == faceSize) { if ((faceSize == 2) && (i == 1)) ornt = -2; else ornt = i; } else { /* - Try backward comparison */ for (j = 0; j < faceSize; ++j) if (cellFace[j] != cone[(i+faceSize-j)%faceSize]) break; if (j == faceSize) ornt = -(i+1); else SETERRQ(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Could not determine face orientation"); } ierr = DMPlexInsertConeOrientation(idm, c, cf, ornt);CHKERRQ(ierr); } } } if (face != pEnd[faceDepth]) SETERRQ2(PetscObjectComm((PetscObject) dm), PETSC_ERR_PLIB, "Invalid number of faces %D should be %D", face-pStart[faceDepth], pEnd[faceDepth]-pStart[faceDepth]); ierr = PetscFree2(pStart,pEnd);CHKERRQ(ierr); ierr = PetscHashIJKLDestroy(&faceTable);CHKERRQ(ierr); ierr = DMPlexSymmetrize(idm);CHKERRQ(ierr); ierr = DMPlexStratify(idm);CHKERRQ(ierr); PetscFunctionReturn(0); }
/* - Checks face match - Flips non-matching - Inserts faces of support cells in FIFO */ static PetscErrorCode DMPlexCheckFace_Internal(DM dm, PetscInt *faceFIFO, PetscInt *fTop, PetscInt *fBottom, PetscInt cStart, PetscInt fStart, PetscInt fEnd, PetscBT seenCells, PetscBT flippedCells, PetscBT seenFaces) { const PetscInt *support, *coneA, *coneB, *coneOA, *coneOB; PetscInt supportSize, coneSizeA, coneSizeB, posA = -1, posB = -1; PetscInt face, dim, seenA, flippedA, seenB, flippedB, mismatch, c; PetscErrorCode ierr; PetscFunctionBegin; face = faceFIFO[(*fTop)++]; ierr = DMGetDimension(dm, &dim);CHKERRQ(ierr); ierr = DMPlexGetSupportSize(dm, face, &supportSize);CHKERRQ(ierr); ierr = DMPlexGetSupport(dm, face, &support);CHKERRQ(ierr); if (supportSize < 2) PetscFunctionReturn(0); if (supportSize != 2) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Faces should separate only two cells, not %d", supportSize); seenA = PetscBTLookup(seenCells, support[0]-cStart); flippedA = PetscBTLookup(flippedCells, support[0]-cStart) ? 1 : 0; seenB = PetscBTLookup(seenCells, support[1]-cStart); flippedB = PetscBTLookup(flippedCells, support[1]-cStart) ? 1 : 0; ierr = DMPlexGetConeSize(dm, support[0], &coneSizeA);CHKERRQ(ierr); ierr = DMPlexGetConeSize(dm, support[1], &coneSizeB);CHKERRQ(ierr); ierr = DMPlexGetCone(dm, support[0], &coneA);CHKERRQ(ierr); ierr = DMPlexGetCone(dm, support[1], &coneB);CHKERRQ(ierr); ierr = DMPlexGetConeOrientation(dm, support[0], &coneOA);CHKERRQ(ierr); ierr = DMPlexGetConeOrientation(dm, support[1], &coneOB);CHKERRQ(ierr); for (c = 0; c < coneSizeA; ++c) { if (!PetscBTLookup(seenFaces, coneA[c]-fStart)) { faceFIFO[(*fBottom)++] = coneA[c]; ierr = PetscBTSet(seenFaces, coneA[c]-fStart);CHKERRQ(ierr); } if (coneA[c] == face) posA = c; if (*fBottom > fEnd-fStart) SETERRQ3(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Face %d was pushed exceeding capacity %d > %d", coneA[c], *fBottom, fEnd-fStart); } if (posA < 0) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Face %d could not be located in cell %d", face, support[0]); for (c = 0; c < coneSizeB; ++c) { if (!PetscBTLookup(seenFaces, coneB[c]-fStart)) { faceFIFO[(*fBottom)++] = coneB[c]; ierr = PetscBTSet(seenFaces, coneB[c]-fStart);CHKERRQ(ierr); } if (coneB[c] == face) posB = c; if (*fBottom > fEnd-fStart) SETERRQ3(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Face %d was pushed exceeding capacity %d > %d", coneA[c], *fBottom, fEnd-fStart); } if (posB < 0) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Face %d could not be located in cell %d", face, support[1]); if (dim == 1) { mismatch = posA == posB; } else { mismatch = coneOA[posA] == coneOB[posB]; } if (mismatch ^ (flippedA ^ flippedB)) { if (seenA && seenB) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Previously seen cells %d and %d do not match: Fault mesh is non-orientable", support[0], support[1]); if (!seenA && !flippedA) { ierr = PetscBTSet(flippedCells, support[0]-cStart);CHKERRQ(ierr); } else if (!seenB && !flippedB) { ierr = PetscBTSet(flippedCells, support[1]-cStart);CHKERRQ(ierr); } else SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Inconsistent mesh orientation: Fault mesh is non-orientable"); } else if (mismatch && flippedA && flippedB) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Attempt to flip already flipped cell: Fault mesh is non-orientable"); ierr = PetscBTSet(seenCells, support[0]-cStart);CHKERRQ(ierr); ierr = PetscBTSet(seenCells, support[1]-cStart);CHKERRQ(ierr); PetscFunctionReturn(0); }
/*@ DMPlexOrient - Give a consistent orientation to the input mesh Input Parameters: . dm - The DM Note: The orientation data for the DM are change in-place. $ This routine will fail for non-orientable surfaces, such as the Moebius strip. Level: advanced .seealso: DMCreate(), DMPLEX @*/ PetscErrorCode DMPlexOrient(DM dm) { MPI_Comm comm; PetscSF sf; const PetscInt *lpoints; const PetscSFNode *rpoints; PetscSFNode *rorntComp = NULL, *lorntComp = NULL; PetscInt *numNeighbors, **neighbors; PetscSFNode *nrankComp; PetscBool *match, *flipped; PetscBT seenCells, flippedCells, seenFaces; PetscInt *faceFIFO, fTop, fBottom, *cellComp, *faceComp; PetscInt numLeaves, numRoots, dim, h, cStart, cEnd, c, cell, fStart, fEnd, face, off, totNeighbors = 0; PetscMPIInt rank, size, numComponents, comp = 0; PetscBool flg, flg2; PetscViewer viewer = NULL, selfviewer = NULL; PetscErrorCode ierr; PetscFunctionBegin; ierr = PetscObjectGetComm((PetscObject) dm, &comm);CHKERRQ(ierr); ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr); ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr); ierr = PetscOptionsHasName(((PetscObject) dm)->options,((PetscObject) dm)->prefix, "-orientation_view", &flg);CHKERRQ(ierr); ierr = PetscOptionsHasName(((PetscObject) dm)->options,((PetscObject) dm)->prefix, "-orientation_view_synchronized", &flg2);CHKERRQ(ierr); ierr = DMGetPointSF(dm, &sf);CHKERRQ(ierr); ierr = PetscSFGetGraph(sf, &numRoots, &numLeaves, &lpoints, &rpoints);CHKERRQ(ierr); /* Truth Table mismatch flips do action mismatch flipA ^ flipB action F 0 flips no F F F F 1 flip yes F T T F 2 flips no T F T T 0 flips yes T T F T 1 flip no T 2 flips yes */ ierr = DMGetDimension(dm, &dim);CHKERRQ(ierr); ierr = DMPlexGetVTKCellHeight(dm, &h);CHKERRQ(ierr); ierr = DMPlexGetHeightStratum(dm, h, &cStart, &cEnd);CHKERRQ(ierr); ierr = DMPlexGetHeightStratum(dm, h+1, &fStart, &fEnd);CHKERRQ(ierr); ierr = PetscBTCreate(cEnd - cStart, &seenCells);CHKERRQ(ierr); ierr = PetscBTMemzero(cEnd - cStart, seenCells);CHKERRQ(ierr); ierr = PetscBTCreate(cEnd - cStart, &flippedCells);CHKERRQ(ierr); ierr = PetscBTMemzero(cEnd - cStart, flippedCells);CHKERRQ(ierr); ierr = PetscBTCreate(fEnd - fStart, &seenFaces);CHKERRQ(ierr); ierr = PetscBTMemzero(fEnd - fStart, seenFaces);CHKERRQ(ierr); ierr = PetscCalloc3(fEnd - fStart, &faceFIFO, cEnd-cStart, &cellComp, fEnd-fStart, &faceComp);CHKERRQ(ierr); /* OLD STYLE - Add an integer array over cells and faces (component) for connected component number Foreach component - Mark the initial cell as seen - Process component as usual - Set component for all seenCells - Wipe seenCells and seenFaces (flippedCells can stay) - Generate parallel adjacency for component using SF and seenFaces - Collect numComponents adj data from each proc to 0 - Build same serial graph - Use same solver - Use Scatterv to to send back flipped flags for each component - Negate flippedCells by component NEW STYLE - Create the adj on each process - Bootstrap to complete graph on proc 0 */ /* Loop over components */ for (cell = cStart; cell < cEnd; ++cell) cellComp[cell-cStart] = -1; do { /* Look for first unmarked cell */ for (cell = cStart; cell < cEnd; ++cell) if (cellComp[cell-cStart] < 0) break; if (cell >= cEnd) break; /* Initialize FIFO with first cell in component */ { const PetscInt *cone; PetscInt coneSize; fTop = fBottom = 0; ierr = DMPlexGetConeSize(dm, cell, &coneSize);CHKERRQ(ierr); ierr = DMPlexGetCone(dm, cell, &cone);CHKERRQ(ierr); for (c = 0; c < coneSize; ++c) { faceFIFO[fBottom++] = cone[c]; ierr = PetscBTSet(seenFaces, cone[c]-fStart);CHKERRQ(ierr); } ierr = PetscBTSet(seenCells, cell-cStart);CHKERRQ(ierr); } /* Consider each face in FIFO */ while (fTop < fBottom) { ierr = DMPlexCheckFace_Internal(dm, faceFIFO, &fTop, &fBottom, cStart, fStart, fEnd, seenCells, flippedCells, seenFaces);CHKERRQ(ierr); } /* Set component for cells and faces */ for (cell = 0; cell < cEnd-cStart; ++cell) { if (PetscBTLookup(seenCells, cell)) cellComp[cell] = comp; } for (face = 0; face < fEnd-fStart; ++face) { if (PetscBTLookup(seenFaces, face)) faceComp[face] = comp; } /* Wipe seenCells and seenFaces for next component */ ierr = PetscBTMemzero(fEnd - fStart, seenFaces);CHKERRQ(ierr); ierr = PetscBTMemzero(cEnd - cStart, seenCells);CHKERRQ(ierr); ++comp; } while (1); numComponents = comp; if (flg) { PetscViewer v; ierr = PetscViewerASCIIGetStdout(comm, &v);CHKERRQ(ierr); ierr = PetscViewerASCIIPushSynchronized(v);CHKERRQ(ierr); ierr = PetscViewerASCIISynchronizedPrintf(v, "[%d]BT for serial flipped cells:\n", rank);CHKERRQ(ierr); ierr = PetscBTView(cEnd-cStart, flippedCells, v);CHKERRQ(ierr); ierr = PetscViewerFlush(v);CHKERRQ(ierr); ierr = PetscViewerASCIIPopSynchronized(v);CHKERRQ(ierr); } /* Now all subdomains are oriented, but we need a consistent parallel orientation */ if (numLeaves >= 0) { /* Store orientations of boundary faces*/ ierr = PetscCalloc2(numRoots,&rorntComp,numRoots,&lorntComp);CHKERRQ(ierr); for (face = fStart; face < fEnd; ++face) { const PetscInt *cone, *support, *ornt; PetscInt coneSize, supportSize; ierr = DMPlexGetSupportSize(dm, face, &supportSize);CHKERRQ(ierr); if (supportSize != 1) continue; ierr = DMPlexGetSupport(dm, face, &support);CHKERRQ(ierr); ierr = DMPlexGetCone(dm, support[0], &cone);CHKERRQ(ierr); ierr = DMPlexGetConeSize(dm, support[0], &coneSize);CHKERRQ(ierr); ierr = DMPlexGetConeOrientation(dm, support[0], &ornt);CHKERRQ(ierr); for (c = 0; c < coneSize; ++c) if (cone[c] == face) break; if (dim == 1) { /* Use cone position instead, shifted to -1 or 1 */ if (PetscBTLookup(flippedCells, support[0]-cStart)) rorntComp[face].rank = 1-c*2; else rorntComp[face].rank = c*2-1; } else { if (PetscBTLookup(flippedCells, support[0]-cStart)) rorntComp[face].rank = ornt[c] < 0 ? -1 : 1; else rorntComp[face].rank = ornt[c] < 0 ? 1 : -1; } rorntComp[face].index = faceComp[face-fStart]; } /* Communicate boundary edge orientations */ ierr = PetscSFBcastBegin(sf, MPIU_2INT, rorntComp, lorntComp);CHKERRQ(ierr); ierr = PetscSFBcastEnd(sf, MPIU_2INT, rorntComp, lorntComp);CHKERRQ(ierr); } /* Get process adjacency */ ierr = PetscMalloc2(numComponents, &numNeighbors, numComponents, &neighbors);CHKERRQ(ierr); viewer = PETSC_VIEWER_STDOUT_(PetscObjectComm((PetscObject)dm)); if (flg2) {ierr = PetscViewerASCIIPushSynchronized(viewer);CHKERRQ(ierr);} ierr = PetscViewerGetSubViewer(viewer,PETSC_COMM_SELF,&selfviewer);CHKERRQ(ierr); for (comp = 0; comp < numComponents; ++comp) { PetscInt l, n; numNeighbors[comp] = 0; ierr = PetscMalloc1(PetscMax(numLeaves, 0), &neighbors[comp]);CHKERRQ(ierr); /* I know this is p^2 time in general, but for bounded degree its alright */ for (l = 0; l < numLeaves; ++l) { const PetscInt face = lpoints[l]; /* Find a representative face (edge) separating pairs of procs */ if ((face >= fStart) && (face < fEnd) && (faceComp[face-fStart] == comp)) { const PetscInt rrank = rpoints[l].rank; const PetscInt rcomp = lorntComp[face].index; for (n = 0; n < numNeighbors[comp]; ++n) if ((rrank == rpoints[neighbors[comp][n]].rank) && (rcomp == lorntComp[lpoints[neighbors[comp][n]]].index)) break; if (n >= numNeighbors[comp]) { PetscInt supportSize; ierr = DMPlexGetSupportSize(dm, face, &supportSize);CHKERRQ(ierr); if (supportSize != 1) SETERRQ1(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Boundary faces should see one cell, not %d", supportSize); if (flg) {ierr = PetscViewerASCIIPrintf(selfviewer, "[%d]: component %d, Found representative leaf %d (face %d) connecting to face %d on (%d, %d) with orientation %d\n", rank, comp, l, face, rpoints[l].index, rrank, rcomp, lorntComp[face].rank);CHKERRQ(ierr);} neighbors[comp][numNeighbors[comp]++] = l; } } } totNeighbors += numNeighbors[comp]; } ierr = PetscViewerRestoreSubViewer(viewer,PETSC_COMM_SELF,&selfviewer);CHKERRQ(ierr); ierr = PetscViewerFlush(viewer);CHKERRQ(ierr); if (flg2) {ierr = PetscViewerASCIIPopSynchronized(viewer);CHKERRQ(ierr);} ierr = PetscMalloc2(totNeighbors, &nrankComp, totNeighbors, &match);CHKERRQ(ierr); for (comp = 0, off = 0; comp < numComponents; ++comp) { PetscInt n; for (n = 0; n < numNeighbors[comp]; ++n, ++off) { const PetscInt face = lpoints[neighbors[comp][n]]; const PetscInt o = rorntComp[face].rank*lorntComp[face].rank; if (o < 0) match[off] = PETSC_TRUE; else if (o > 0) match[off] = PETSC_FALSE; else SETERRQ5(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Invalid face %d (%d, %d) neighbor: %d comp: %d", face, rorntComp[face], lorntComp[face], neighbors[comp][n], comp); nrankComp[off].rank = rpoints[neighbors[comp][n]].rank; nrankComp[off].index = lorntComp[lpoints[neighbors[comp][n]]].index; } ierr = PetscFree(neighbors[comp]);CHKERRQ(ierr); } /* Collect the graph on 0 */ if (numLeaves >= 0) { Mat G; PetscBT seenProcs, flippedProcs; PetscInt *procFIFO, pTop, pBottom; PetscInt *N = NULL, *Noff; PetscSFNode *adj = NULL; PetscBool *val = NULL; PetscMPIInt *recvcounts = NULL, *displs = NULL, *Nc, p, o; PetscMPIInt size = 0; ierr = PetscCalloc1(numComponents, &flipped);CHKERRQ(ierr); if (!rank) {ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr);} ierr = PetscCalloc4(size, &recvcounts, size+1, &displs, size, &Nc, size+1, &Noff);CHKERRQ(ierr); ierr = MPI_Gather(&numComponents, 1, MPI_INT, Nc, 1, MPI_INT, 0, comm);CHKERRQ(ierr); for (p = 0; p < size; ++p) { displs[p+1] = displs[p] + Nc[p]; } if (!rank) {ierr = PetscMalloc1(displs[size],&N);CHKERRQ(ierr);} ierr = MPI_Gatherv(numNeighbors, numComponents, MPIU_INT, N, Nc, displs, MPIU_INT, 0, comm);CHKERRQ(ierr); for (p = 0, o = 0; p < size; ++p) { recvcounts[p] = 0; for (c = 0; c < Nc[p]; ++c, ++o) recvcounts[p] += N[o]; displs[p+1] = displs[p] + recvcounts[p]; } if (!rank) {ierr = PetscMalloc2(displs[size], &adj, displs[size], &val);CHKERRQ(ierr);} ierr = MPI_Gatherv(nrankComp, totNeighbors, MPIU_2INT, adj, recvcounts, displs, MPIU_2INT, 0, comm);CHKERRQ(ierr); ierr = MPI_Gatherv(match, totNeighbors, MPIU_BOOL, val, recvcounts, displs, MPIU_BOOL, 0, comm);CHKERRQ(ierr); ierr = PetscFree2(numNeighbors, neighbors);CHKERRQ(ierr); if (!rank) { for (p = 1; p <= size; ++p) {Noff[p] = Noff[p-1] + Nc[p-1];} if (flg) { PetscInt n; for (p = 0, off = 0; p < size; ++p) { for (c = 0; c < Nc[p]; ++c) { ierr = PetscPrintf(PETSC_COMM_SELF, "Proc %d Comp %d:\n", p, c);CHKERRQ(ierr); for (n = 0; n < N[Noff[p]+c]; ++n, ++off) { ierr = PetscPrintf(PETSC_COMM_SELF, " edge (%d, %d) (%d):\n", adj[off].rank, adj[off].index, val[off]);CHKERRQ(ierr); } } } } /* Symmetrize the graph */ ierr = MatCreate(PETSC_COMM_SELF, &G);CHKERRQ(ierr); ierr = MatSetSizes(G, Noff[size], Noff[size], Noff[size], Noff[size]);CHKERRQ(ierr); ierr = MatSetUp(G);CHKERRQ(ierr); for (p = 0, off = 0; p < size; ++p) { for (c = 0; c < Nc[p]; ++c) { const PetscInt r = Noff[p]+c; PetscInt n; for (n = 0; n < N[r]; ++n, ++off) { const PetscInt q = Noff[adj[off].rank] + adj[off].index; const PetscScalar o = val[off] ? 1.0 : 0.0; ierr = MatSetValues(G, 1, &r, 1, &q, &o, INSERT_VALUES);CHKERRQ(ierr); ierr = MatSetValues(G, 1, &q, 1, &r, &o, INSERT_VALUES);CHKERRQ(ierr); } } } ierr = MatAssemblyBegin(G, MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); ierr = MatAssemblyEnd(G, MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); ierr = PetscBTCreate(Noff[size], &seenProcs);CHKERRQ(ierr); ierr = PetscBTMemzero(Noff[size], seenProcs);CHKERRQ(ierr); ierr = PetscBTCreate(Noff[size], &flippedProcs);CHKERRQ(ierr); ierr = PetscBTMemzero(Noff[size], flippedProcs);CHKERRQ(ierr); ierr = PetscMalloc1(Noff[size], &procFIFO);CHKERRQ(ierr); pTop = pBottom = 0; for (p = 0; p < Noff[size]; ++p) { if (PetscBTLookup(seenProcs, p)) continue; /* Initialize FIFO with next proc */ procFIFO[pBottom++] = p; ierr = PetscBTSet(seenProcs, p);CHKERRQ(ierr); /* Consider each proc in FIFO */ while (pTop < pBottom) { const PetscScalar *ornt; const PetscInt *neighbors; PetscInt proc, nproc, seen, flippedA, flippedB, mismatch, numNeighbors, n; proc = procFIFO[pTop++]; flippedA = PetscBTLookup(flippedProcs, proc) ? 1 : 0; ierr = MatGetRow(G, proc, &numNeighbors, &neighbors, &ornt);CHKERRQ(ierr); /* Loop over neighboring procs */ for (n = 0; n < numNeighbors; ++n) { nproc = neighbors[n]; mismatch = PetscRealPart(ornt[n]) > 0.5 ? 0 : 1; seen = PetscBTLookup(seenProcs, nproc); flippedB = PetscBTLookup(flippedProcs, nproc) ? 1 : 0; if (mismatch ^ (flippedA ^ flippedB)) { if (seen) SETERRQ2(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Previously seen procs %d and %d do not match: Fault mesh is non-orientable", proc, nproc); if (!flippedB) { ierr = PetscBTSet(flippedProcs, nproc);CHKERRQ(ierr); } else SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Inconsistent mesh orientation: Fault mesh is non-orientable"); } else if (mismatch && flippedA && flippedB) SETERRQ(PETSC_COMM_SELF, PETSC_ERR_ARG_WRONG, "Attempt to flip already flipped cell: Fault mesh is non-orientable"); if (!seen) { procFIFO[pBottom++] = nproc; ierr = PetscBTSet(seenProcs, nproc);CHKERRQ(ierr); } } } } ierr = PetscFree(procFIFO);CHKERRQ(ierr); ierr = MatDestroy(&G);CHKERRQ(ierr); ierr = PetscFree2(adj, val);CHKERRQ(ierr); ierr = PetscBTDestroy(&seenProcs);CHKERRQ(ierr); } /* Scatter flip flags */ { PetscBool *flips = NULL; if (!rank) { ierr = PetscMalloc1(Noff[size], &flips);CHKERRQ(ierr); for (p = 0; p < Noff[size]; ++p) { flips[p] = PetscBTLookup(flippedProcs, p) ? PETSC_TRUE : PETSC_FALSE; if (flg && flips[p]) {ierr = PetscPrintf(comm, "Flipping Proc+Comp %d:\n", p);CHKERRQ(ierr);} } for (p = 0; p < size; ++p) { displs[p+1] = displs[p] + Nc[p]; } } ierr = MPI_Scatterv(flips, Nc, displs, MPIU_BOOL, flipped, numComponents, MPIU_BOOL, 0, comm);CHKERRQ(ierr); ierr = PetscFree(flips);CHKERRQ(ierr); } if (!rank) {ierr = PetscBTDestroy(&flippedProcs);CHKERRQ(ierr);} ierr = PetscFree(N);CHKERRQ(ierr); ierr = PetscFree4(recvcounts, displs, Nc, Noff);CHKERRQ(ierr); ierr = PetscFree2(nrankComp, match);CHKERRQ(ierr); /* Decide whether to flip cells in each component */ for (c = 0; c < cEnd-cStart; ++c) {if (flipped[cellComp[c]]) {ierr = PetscBTNegate(flippedCells, c);CHKERRQ(ierr);}} ierr = PetscFree(flipped);CHKERRQ(ierr); } if (flg) { PetscViewer v; ierr = PetscViewerASCIIGetStdout(comm, &v);CHKERRQ(ierr); ierr = PetscViewerASCIIPushSynchronized(v);CHKERRQ(ierr); ierr = PetscViewerASCIISynchronizedPrintf(v, "[%d]BT for parallel flipped cells:\n", rank);CHKERRQ(ierr); ierr = PetscBTView(cEnd-cStart, flippedCells, v);CHKERRQ(ierr); ierr = PetscViewerFlush(v);CHKERRQ(ierr); ierr = PetscViewerASCIIPopSynchronized(v);CHKERRQ(ierr); } /* Reverse flipped cells in the mesh */ for (c = cStart; c < cEnd; ++c) { if (PetscBTLookup(flippedCells, c-cStart)) { ierr = DMPlexReverseCell(dm, c);CHKERRQ(ierr); } } ierr = PetscBTDestroy(&seenCells);CHKERRQ(ierr); ierr = PetscBTDestroy(&flippedCells);CHKERRQ(ierr); ierr = PetscBTDestroy(&seenFaces);CHKERRQ(ierr); ierr = PetscFree2(numNeighbors, neighbors);CHKERRQ(ierr); ierr = PetscFree2(rorntComp, lorntComp);CHKERRQ(ierr); ierr = PetscFree3(faceFIFO, cellComp, faceComp);CHKERRQ(ierr); PetscFunctionReturn(0); }