/*@C PetscSFGetGroups - gets incoming and outgoing process groups Collective Input Argument: . sf - star forest Output Arguments: + incoming - group of origin processes for incoming edges (leaves that reference my roots) - outgoing - group of destination processes for outgoing edges (roots that I reference) Level: developer .seealso: PetscSFGetWindow(), PetscSFRestoreWindow() @*/ PetscErrorCode PetscSFGetGroups(PetscSF sf,MPI_Group *incoming,MPI_Group *outgoing) { PetscErrorCode ierr; MPI_Group group; PetscFunctionBegin; if (sf->ingroup == MPI_GROUP_NULL) { PetscInt i; const PetscInt *indegree; PetscMPIInt rank,*outranks,*inranks; PetscSFNode *remote; PetscSF bgcount; /* Compute the number of incoming ranks */ ierr = PetscMalloc1(sf->nranks,&remote);CHKERRQ(ierr); for (i=0; i<sf->nranks; i++) { remote[i].rank = sf->ranks[i]; remote[i].index = 0; } ierr = PetscSFDuplicate(sf,PETSCSF_DUPLICATE_CONFONLY,&bgcount);CHKERRQ(ierr); ierr = PetscSFSetGraph(bgcount,1,sf->nranks,NULL,PETSC_COPY_VALUES,remote,PETSC_OWN_POINTER);CHKERRQ(ierr); ierr = PetscSFComputeDegreeBegin(bgcount,&indegree);CHKERRQ(ierr); ierr = PetscSFComputeDegreeEnd(bgcount,&indegree);CHKERRQ(ierr); /* Enumerate the incoming ranks */ ierr = PetscMalloc2(indegree[0],&inranks,sf->nranks,&outranks);CHKERRQ(ierr); ierr = MPI_Comm_rank(PetscObjectComm((PetscObject)sf),&rank);CHKERRQ(ierr); for (i=0; i<sf->nranks; i++) outranks[i] = rank; ierr = PetscSFGatherBegin(bgcount,MPI_INT,outranks,inranks);CHKERRQ(ierr); ierr = PetscSFGatherEnd(bgcount,MPI_INT,outranks,inranks);CHKERRQ(ierr); ierr = MPI_Comm_group(PetscObjectComm((PetscObject)sf),&group);CHKERRQ(ierr); ierr = MPI_Group_incl(group,indegree[0],inranks,&sf->ingroup);CHKERRQ(ierr); ierr = MPI_Group_free(&group);CHKERRQ(ierr); ierr = PetscFree2(inranks,outranks);CHKERRQ(ierr); ierr = PetscSFDestroy(&bgcount);CHKERRQ(ierr); } *incoming = sf->ingroup; if (sf->outgroup == MPI_GROUP_NULL) { ierr = MPI_Comm_group(PetscObjectComm((PetscObject)sf),&group);CHKERRQ(ierr); ierr = MPI_Group_incl(group,sf->nranks,sf->ranks,&sf->outgroup);CHKERRQ(ierr); ierr = MPI_Group_free(&group);CHKERRQ(ierr); } *outgoing = sf->outgroup; PetscFunctionReturn(0); }
/*@ DMLabelGather - Gather all label values from leafs into roots Input Parameters: + label - the DMLabel . point - the Star Forest point communication map Input Parameters: + label - the new DMLabel with localised leaf values Level: developer Note: This is the inverse operation to DMLabelDistribute. .seealso: DMLabelDistribute() @*/ PetscErrorCode DMLabelGather(DMLabel label, PetscSF sf, DMLabel *labelNew) { MPI_Comm comm; PetscSection rootSection; PetscSF sfLabel; PetscSFNode *rootPoints, *leafPoints; PetscInt p, s, d, nroots, nleaves, nmultiroots, idx, dof, offset; const PetscInt *rootDegree, *ilocal; PetscInt *rootStrata; char *name; PetscInt nameSize; size_t len = 0; PetscMPIInt rank, numProcs; PetscErrorCode ierr; PetscFunctionBegin; ierr = PetscObjectGetComm((PetscObject)sf, &comm);CHKERRQ(ierr); ierr = MPI_Comm_rank(comm, &rank);CHKERRQ(ierr); ierr = MPI_Comm_size(comm, &numProcs);CHKERRQ(ierr); /* Bcast name */ if (!rank) {ierr = PetscStrlen(label->name, &len);CHKERRQ(ierr);} nameSize = len; ierr = MPI_Bcast(&nameSize, 1, MPIU_INT, 0, comm);CHKERRQ(ierr); ierr = PetscMalloc1(nameSize+1, &name);CHKERRQ(ierr); if (!rank) {ierr = PetscMemcpy(name, label->name, nameSize+1);CHKERRQ(ierr);} ierr = MPI_Bcast(name, nameSize+1, MPI_CHAR, 0, comm);CHKERRQ(ierr); ierr = DMLabelCreate(name, labelNew);CHKERRQ(ierr); ierr = PetscFree(name);CHKERRQ(ierr); /* Gather rank/index pairs of leaves into local roots to build an inverse, multi-rooted SF. Note that this ignores local leaf indexing due to the use of the multiSF in PetscSFGather. */ ierr = PetscSFGetGraph(sf, &nroots, &nleaves, &ilocal, NULL);CHKERRQ(ierr); ierr = PetscMalloc1(nleaves, &leafPoints);CHKERRQ(ierr); for (p = 0; p < nleaves; p++) { leafPoints[p].index = ilocal[p]; leafPoints[p].rank = rank; } ierr = PetscSFComputeDegreeBegin(sf, &rootDegree);CHKERRQ(ierr); ierr = PetscSFComputeDegreeEnd(sf, &rootDegree);CHKERRQ(ierr); for (p = 0, nmultiroots = 0; p < nroots; ++p) nmultiroots += rootDegree[p]; ierr = PetscMalloc1(nmultiroots, &rootPoints);CHKERRQ(ierr); ierr = PetscSFGatherBegin(sf, MPIU_2INT, leafPoints, rootPoints);CHKERRQ(ierr); ierr = PetscSFGatherEnd(sf, MPIU_2INT, leafPoints, rootPoints);CHKERRQ(ierr); ierr = PetscSFCreate(comm,& sfLabel);CHKERRQ(ierr); ierr = PetscSFSetGraph(sfLabel, nroots, nmultiroots, NULL, PETSC_OWN_POINTER, rootPoints, PETSC_OWN_POINTER);CHKERRQ(ierr); /* Migrate label over inverted SF to pull stratum values at leaves into roots. */ ierr = DMLabelDistribute_Internal(label, sfLabel, &rootSection, &rootStrata);CHKERRQ(ierr); /* Rebuild the point strata on the receiver */ for (p = 0, idx = 0; p < nroots; p++) { for (d = 0; d < rootDegree[p]; d++) { ierr = PetscSectionGetDof(rootSection, idx+d, &dof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(rootSection, idx+d, &offset);CHKERRQ(ierr); for (s = 0; s < dof; s++) {ierr = DMLabelSetValue(*labelNew, p, rootStrata[offset+s]);CHKERRQ(ierr);} } idx += rootDegree[p]; } ierr = PetscFree(leafPoints);CHKERRQ(ierr); ierr = PetscFree(rootStrata);CHKERRQ(ierr); ierr = PetscSectionDestroy(&rootSection);CHKERRQ(ierr); ierr = PetscSFDestroy(&sfLabel);CHKERRQ(ierr); PetscFunctionReturn(0); }
PetscErrorCode DMPlexPreallocateOperator(DM dm, PetscInt bs, PetscSection section, PetscSection sectionGlobal, PetscInt dnz[], PetscInt onz[], PetscInt dnzu[], PetscInt onzu[], Mat A, PetscBool fillMatrix) { MPI_Comm comm; MatType mtype; PetscSF sf, sfDof, sfAdj; PetscSection leafSectionAdj, rootSectionAdj, sectionAdj, anchorSectionAdj; PetscInt nroots, nleaves, l, p; const PetscInt *leaves; const PetscSFNode *remotes; PetscInt dim, pStart, pEnd, numDof, globalOffStart, globalOffEnd, numCols; PetscInt *tmpAdj = NULL, *adj, *rootAdj, *anchorAdj = NULL, *cols, *remoteOffsets; PetscInt adjSize; PetscLayout rLayout; PetscInt locRows, rStart, rEnd, r; PetscMPIInt size; PetscBool doCommLocal, doComm, debug = PETSC_FALSE, isSymBlock, isSymSeqBlock, isSymMPIBlock; PetscBool useAnchors; PetscErrorCode ierr; PetscFunctionBegin; PetscValidHeaderSpecific(dm, DM_CLASSID, 1); PetscValidHeaderSpecific(section, PETSC_SECTION_CLASSID, 3); PetscValidHeaderSpecific(sectionGlobal, PETSC_SECTION_CLASSID, 4); PetscValidHeaderSpecific(A, MAT_CLASSID, 9); if (dnz) PetscValidPointer(dnz,5); if (onz) PetscValidPointer(onz,6); if (dnzu) PetscValidPointer(dnzu,7); if (onzu) PetscValidPointer(onzu,8); ierr = PetscLogEventBegin(DMPLEX_Preallocate,dm,0,0,0);CHKERRQ(ierr); ierr = PetscObjectGetComm((PetscObject)dm,&comm);CHKERRQ(ierr); ierr = PetscOptionsGetBool(NULL, "-dm_view_preallocation", &debug, NULL);CHKERRQ(ierr); ierr = MPI_Comm_size(comm, &size);CHKERRQ(ierr); ierr = DMGetDimension(dm, &dim);CHKERRQ(ierr); ierr = DMGetPointSF(dm, &sf);CHKERRQ(ierr); ierr = PetscSFGetGraph(sf, &nroots, NULL, NULL, NULL);CHKERRQ(ierr); doCommLocal = (size > 1) && (nroots >= 0) ? PETSC_TRUE : PETSC_FALSE; ierr = MPI_Allreduce(&doCommLocal, &doComm, 1, MPIU_BOOL, MPI_LAND, comm);CHKERRQ(ierr); /* Create dof SF based on point SF */ if (debug) { ierr = PetscPrintf(comm, "Input Section for Preallocation:\n");CHKERRQ(ierr); ierr = PetscSectionView(section, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); ierr = PetscPrintf(comm, "Input Global Section for Preallocation:\n");CHKERRQ(ierr); ierr = PetscSectionView(sectionGlobal, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); ierr = PetscPrintf(comm, "Input SF for Preallocation:\n");CHKERRQ(ierr); ierr = PetscSFView(sf, NULL);CHKERRQ(ierr); } ierr = PetscSFCreateRemoteOffsets(sf, section, section, &remoteOffsets);CHKERRQ(ierr); ierr = PetscSFCreateSectionSF(sf, section, remoteOffsets, section, &sfDof);CHKERRQ(ierr); if (debug) { ierr = PetscPrintf(comm, "Dof SF for Preallocation:\n");CHKERRQ(ierr); ierr = PetscSFView(sfDof, NULL);CHKERRQ(ierr); } /* Create section for dof adjacency (dof ==> # adj dof) */ ierr = PetscSectionGetChart(section, &pStart, &pEnd);CHKERRQ(ierr); ierr = PetscSectionGetStorageSize(section, &numDof);CHKERRQ(ierr); ierr = PetscSectionCreate(comm, &leafSectionAdj);CHKERRQ(ierr); ierr = PetscSectionSetChart(leafSectionAdj, 0, numDof);CHKERRQ(ierr); ierr = PetscSectionCreate(comm, &rootSectionAdj);CHKERRQ(ierr); ierr = PetscSectionSetChart(rootSectionAdj, 0, numDof);CHKERRQ(ierr); /* Fill in the ghost dofs on the interface */ ierr = PetscSFGetGraph(sf, NULL, &nleaves, &leaves, &remotes);CHKERRQ(ierr); /* use constraints in finding adjacency in this routine */ ierr = DMPlexGetAdjacencyUseAnchors(dm,&useAnchors);CHKERRQ(ierr); ierr = DMPlexSetAdjacencyUseAnchors(dm,PETSC_TRUE);CHKERRQ(ierr); /* section - maps points to (# dofs, local dofs) sectionGlobal - maps points to (# dofs, global dofs) leafSectionAdj - maps unowned local dofs to # adj dofs rootSectionAdj - maps owned local dofs to # adj dofs adj - adj global dofs indexed by leafSectionAdj rootAdj - adj global dofs indexed by rootSectionAdj sf - describes shared points across procs sfDof - describes shared dofs across procs sfAdj - describes shared adjacent dofs across procs ** The bootstrapping process involves six rounds with similar structure of visiting neighbors of each point. (0). If there are point-to-point constraints, add the adjacencies of constrained points to anchors in anchorAdj (This is done in DMPlexComputeAnchorAdjacencies()) 1. Visit unowned points on interface, count adjacencies placing in leafSectionAdj Reduce those counts to rootSectionAdj (now redundantly counting some interface points) 2. Visit owned points on interface, count adjacencies placing in rootSectionAdj Create sfAdj connecting rootSectionAdj and leafSectionAdj 3. Visit unowned points on interface, write adjacencies to adj Gather adj to rootAdj (note that there is redundancy in rootAdj when multiple procs find the same adjacencies) 4. Visit owned points on interface, write adjacencies to rootAdj Remove redundancy in rootAdj ** The last two traversals use transitive closure 5. Visit all owned points in the subdomain, count dofs for each point (sectionAdj) Allocate memory addressed by sectionAdj (cols) 6. Visit all owned points in the subdomain, insert dof adjacencies into cols ** Knowing all the column adjacencies, check ownership and sum into dnz and onz */ ierr = DMPlexComputeAnchorAdjacencies(dm,section,sectionGlobal,&anchorSectionAdj,&anchorAdj);CHKERRQ(ierr); for (l = 0; l < nleaves; ++l) { PetscInt dof, off, d, q, anDof; PetscInt p = leaves[l], numAdj = PETSC_DETERMINE; if ((p < pStart) || (p >= pEnd)) continue; ierr = PetscSectionGetDof(section, p, &dof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(section, p, &off);CHKERRQ(ierr); ierr = DMPlexGetAdjacency(dm, p, &numAdj, &tmpAdj);CHKERRQ(ierr); for (q = 0; q < numAdj; ++q) { const PetscInt padj = tmpAdj[q]; PetscInt ndof, ncdof; if ((padj < pStart) || (padj >= pEnd)) continue; ierr = PetscSectionGetDof(section, padj, &ndof);CHKERRQ(ierr); ierr = PetscSectionGetConstraintDof(section, padj, &ncdof);CHKERRQ(ierr); for (d = off; d < off+dof; ++d) { ierr = PetscSectionAddDof(leafSectionAdj, d, ndof-ncdof);CHKERRQ(ierr); } } ierr = PetscSectionGetDof(anchorSectionAdj, p, &anDof);CHKERRQ(ierr); if (anDof) { for (d = off; d < off+dof; ++d) { ierr = PetscSectionAddDof(leafSectionAdj, d, anDof);CHKERRQ(ierr); } } } ierr = PetscSectionSetUp(leafSectionAdj);CHKERRQ(ierr); if (debug) { ierr = PetscPrintf(comm, "Adjacency Section for Preallocation on Leaves:\n");CHKERRQ(ierr); ierr = PetscSectionView(leafSectionAdj, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); } /* Get maximum remote adjacency sizes for owned dofs on interface (roots) */ if (doComm) { ierr = PetscSFReduceBegin(sfDof, MPIU_INT, leafSectionAdj->atlasDof, rootSectionAdj->atlasDof, MPI_SUM);CHKERRQ(ierr); ierr = PetscSFReduceEnd(sfDof, MPIU_INT, leafSectionAdj->atlasDof, rootSectionAdj->atlasDof, MPI_SUM);CHKERRQ(ierr); } if (debug) { ierr = PetscPrintf(comm, "Adjancency Section for Preallocation on Roots:\n");CHKERRQ(ierr); ierr = PetscSectionView(rootSectionAdj, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); } /* Add in local adjacency sizes for owned dofs on interface (roots) */ for (p = pStart; p < pEnd; ++p) { PetscInt numAdj = PETSC_DETERMINE, adof, dof, off, d, q, anDof; ierr = PetscSectionGetDof(section, p, &dof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(section, p, &off);CHKERRQ(ierr); if (!dof) continue; ierr = PetscSectionGetDof(rootSectionAdj, off, &adof);CHKERRQ(ierr); if (adof <= 0) continue; ierr = DMPlexGetAdjacency(dm, p, &numAdj, &tmpAdj);CHKERRQ(ierr); for (q = 0; q < numAdj; ++q) { const PetscInt padj = tmpAdj[q]; PetscInt ndof, ncdof; if ((padj < pStart) || (padj >= pEnd)) continue; ierr = PetscSectionGetDof(section, padj, &ndof);CHKERRQ(ierr); ierr = PetscSectionGetConstraintDof(section, padj, &ncdof);CHKERRQ(ierr); for (d = off; d < off+dof; ++d) { ierr = PetscSectionAddDof(rootSectionAdj, d, ndof-ncdof);CHKERRQ(ierr); } } ierr = PetscSectionGetDof(anchorSectionAdj, p, &anDof);CHKERRQ(ierr); if (anDof) { for (d = off; d < off+dof; ++d) { ierr = PetscSectionAddDof(rootSectionAdj, d, anDof);CHKERRQ(ierr); } } } ierr = PetscSectionSetUp(rootSectionAdj);CHKERRQ(ierr); if (debug) { ierr = PetscPrintf(comm, "Adjancency Section for Preallocation on Roots after local additions:\n");CHKERRQ(ierr); ierr = PetscSectionView(rootSectionAdj, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); } /* Create adj SF based on dof SF */ ierr = PetscSFCreateRemoteOffsets(sfDof, rootSectionAdj, leafSectionAdj, &remoteOffsets);CHKERRQ(ierr); ierr = PetscSFCreateSectionSF(sfDof, rootSectionAdj, remoteOffsets, leafSectionAdj, &sfAdj);CHKERRQ(ierr); if (debug) { ierr = PetscPrintf(comm, "Adjacency SF for Preallocation:\n");CHKERRQ(ierr); ierr = PetscSFView(sfAdj, NULL);CHKERRQ(ierr); } ierr = PetscSFDestroy(&sfDof);CHKERRQ(ierr); /* Create leaf adjacency */ ierr = PetscSectionSetUp(leafSectionAdj);CHKERRQ(ierr); ierr = PetscSectionGetStorageSize(leafSectionAdj, &adjSize);CHKERRQ(ierr); ierr = PetscCalloc1(adjSize, &adj);CHKERRQ(ierr); for (l = 0; l < nleaves; ++l) { PetscInt dof, off, d, q, anDof, anOff; PetscInt p = leaves[l], numAdj = PETSC_DETERMINE; if ((p < pStart) || (p >= pEnd)) continue; ierr = PetscSectionGetDof(section, p, &dof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(section, p, &off);CHKERRQ(ierr); ierr = DMPlexGetAdjacency(dm, p, &numAdj, &tmpAdj);CHKERRQ(ierr); ierr = PetscSectionGetDof(anchorSectionAdj, p, &anDof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(anchorSectionAdj, p, &anOff);CHKERRQ(ierr); for (d = off; d < off+dof; ++d) { PetscInt aoff, i = 0; ierr = PetscSectionGetOffset(leafSectionAdj, d, &aoff);CHKERRQ(ierr); for (q = 0; q < numAdj; ++q) { const PetscInt padj = tmpAdj[q]; PetscInt ndof, ncdof, ngoff, nd; if ((padj < pStart) || (padj >= pEnd)) continue; ierr = PetscSectionGetDof(section, padj, &ndof);CHKERRQ(ierr); ierr = PetscSectionGetConstraintDof(section, padj, &ncdof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(sectionGlobal, padj, &ngoff);CHKERRQ(ierr); for (nd = 0; nd < ndof-ncdof; ++nd) { adj[aoff+i] = (ngoff < 0 ? -(ngoff+1) : ngoff) + nd; ++i; } } for (q = 0; q < anDof; q++) { adj[aoff+i] = anchorAdj[anOff+q]; ++i; } } } /* Debugging */ if (debug) { IS tmp; ierr = PetscPrintf(comm, "Leaf adjacency indices\n");CHKERRQ(ierr); ierr = ISCreateGeneral(comm, adjSize, adj, PETSC_USE_POINTER, &tmp);CHKERRQ(ierr); ierr = ISView(tmp, NULL);CHKERRQ(ierr); ierr = ISDestroy(&tmp);CHKERRQ(ierr); } /* Gather adjacenct indices to root */ ierr = PetscSectionGetStorageSize(rootSectionAdj, &adjSize);CHKERRQ(ierr); ierr = PetscMalloc1(adjSize, &rootAdj);CHKERRQ(ierr); for (r = 0; r < adjSize; ++r) rootAdj[r] = -1; if (doComm) { ierr = PetscSFGatherBegin(sfAdj, MPIU_INT, adj, rootAdj);CHKERRQ(ierr); ierr = PetscSFGatherEnd(sfAdj, MPIU_INT, adj, rootAdj);CHKERRQ(ierr); } ierr = PetscSFDestroy(&sfAdj);CHKERRQ(ierr); ierr = PetscFree(adj);CHKERRQ(ierr); /* Debugging */ if (debug) { IS tmp; ierr = PetscPrintf(comm, "Root adjacency indices after gather\n");CHKERRQ(ierr); ierr = ISCreateGeneral(comm, adjSize, rootAdj, PETSC_USE_POINTER, &tmp);CHKERRQ(ierr); ierr = ISView(tmp, NULL);CHKERRQ(ierr); ierr = ISDestroy(&tmp);CHKERRQ(ierr); } /* Add in local adjacency indices for owned dofs on interface (roots) */ for (p = pStart; p < pEnd; ++p) { PetscInt numAdj = PETSC_DETERMINE, adof, dof, off, d, q, anDof, anOff; ierr = PetscSectionGetDof(section, p, &dof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(section, p, &off);CHKERRQ(ierr); if (!dof) continue; ierr = PetscSectionGetDof(rootSectionAdj, off, &adof);CHKERRQ(ierr); if (adof <= 0) continue; ierr = DMPlexGetAdjacency(dm, p, &numAdj, &tmpAdj);CHKERRQ(ierr); ierr = PetscSectionGetDof(anchorSectionAdj, p, &anDof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(anchorSectionAdj, p, &anOff);CHKERRQ(ierr); for (d = off; d < off+dof; ++d) { PetscInt adof, aoff, i; ierr = PetscSectionGetDof(rootSectionAdj, d, &adof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(rootSectionAdj, d, &aoff);CHKERRQ(ierr); i = adof-1; for (q = 0; q < anDof; q++) { rootAdj[aoff+i] = anchorAdj[anOff+q]; --i; } for (q = 0; q < numAdj; ++q) { const PetscInt padj = tmpAdj[q]; PetscInt ndof, ncdof, ngoff, nd; if ((padj < pStart) || (padj >= pEnd)) continue; ierr = PetscSectionGetDof(section, padj, &ndof);CHKERRQ(ierr); ierr = PetscSectionGetConstraintDof(section, padj, &ncdof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(sectionGlobal, padj, &ngoff);CHKERRQ(ierr); for (nd = 0; nd < ndof-ncdof; ++nd) { rootAdj[aoff+i] = ngoff < 0 ? -(ngoff+1)+nd : ngoff+nd; --i; } } } } /* Debugging */ if (debug) { IS tmp; ierr = PetscPrintf(comm, "Root adjacency indices\n");CHKERRQ(ierr); ierr = ISCreateGeneral(comm, adjSize, rootAdj, PETSC_USE_POINTER, &tmp);CHKERRQ(ierr); ierr = ISView(tmp, NULL);CHKERRQ(ierr); ierr = ISDestroy(&tmp);CHKERRQ(ierr); } /* Compress indices */ ierr = PetscSectionSetUp(rootSectionAdj);CHKERRQ(ierr); for (p = pStart; p < pEnd; ++p) { PetscInt dof, cdof, off, d; PetscInt adof, aoff; ierr = PetscSectionGetDof(section, p, &dof);CHKERRQ(ierr); ierr = PetscSectionGetConstraintDof(section, p, &cdof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(section, p, &off);CHKERRQ(ierr); if (!dof) continue; ierr = PetscSectionGetDof(rootSectionAdj, off, &adof);CHKERRQ(ierr); if (adof <= 0) continue; for (d = off; d < off+dof-cdof; ++d) { ierr = PetscSectionGetDof(rootSectionAdj, d, &adof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(rootSectionAdj, d, &aoff);CHKERRQ(ierr); ierr = PetscSortRemoveDupsInt(&adof, &rootAdj[aoff]);CHKERRQ(ierr); ierr = PetscSectionSetDof(rootSectionAdj, d, adof);CHKERRQ(ierr); } } /* Debugging */ if (debug) { IS tmp; ierr = PetscPrintf(comm, "Adjancency Section for Preallocation on Roots after compression:\n");CHKERRQ(ierr); ierr = PetscSectionView(rootSectionAdj, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); ierr = PetscPrintf(comm, "Root adjacency indices after compression\n");CHKERRQ(ierr); ierr = ISCreateGeneral(comm, adjSize, rootAdj, PETSC_USE_POINTER, &tmp);CHKERRQ(ierr); ierr = ISView(tmp, NULL);CHKERRQ(ierr); ierr = ISDestroy(&tmp);CHKERRQ(ierr); } /* Build adjacency section: Maps global indices to sets of adjacent global indices */ ierr = PetscSectionGetOffsetRange(sectionGlobal, &globalOffStart, &globalOffEnd);CHKERRQ(ierr); ierr = PetscSectionCreate(comm, §ionAdj);CHKERRQ(ierr); ierr = PetscSectionSetChart(sectionAdj, globalOffStart, globalOffEnd);CHKERRQ(ierr); for (p = pStart; p < pEnd; ++p) { PetscInt numAdj = PETSC_DETERMINE, dof, cdof, off, goff, d, q, anDof; PetscBool found = PETSC_TRUE; ierr = PetscSectionGetDof(section, p, &dof);CHKERRQ(ierr); ierr = PetscSectionGetConstraintDof(section, p, &cdof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(section, p, &off);CHKERRQ(ierr); ierr = PetscSectionGetOffset(sectionGlobal, p, &goff);CHKERRQ(ierr); for (d = 0; d < dof-cdof; ++d) { PetscInt ldof, rdof; ierr = PetscSectionGetDof(leafSectionAdj, off+d, &ldof);CHKERRQ(ierr); ierr = PetscSectionGetDof(rootSectionAdj, off+d, &rdof);CHKERRQ(ierr); if (ldof > 0) { /* We do not own this point */ } else if (rdof > 0) { ierr = PetscSectionSetDof(sectionAdj, goff+d, rdof);CHKERRQ(ierr); } else { found = PETSC_FALSE; } } if (found) continue; ierr = PetscSectionGetDof(section, p, &dof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(sectionGlobal, p, &goff);CHKERRQ(ierr); ierr = DMPlexGetAdjacency(dm, p, &numAdj, &tmpAdj);CHKERRQ(ierr); for (q = 0; q < numAdj; ++q) { const PetscInt padj = tmpAdj[q]; PetscInt ndof, ncdof, noff; if ((padj < pStart) || (padj >= pEnd)) continue; ierr = PetscSectionGetDof(section, padj, &ndof);CHKERRQ(ierr); ierr = PetscSectionGetConstraintDof(section, padj, &ncdof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(section, padj, &noff);CHKERRQ(ierr); for (d = goff; d < goff+dof-cdof; ++d) { ierr = PetscSectionAddDof(sectionAdj, d, ndof-ncdof);CHKERRQ(ierr); } } ierr = PetscSectionGetDof(anchorSectionAdj, p, &anDof);CHKERRQ(ierr); if (anDof) { for (d = goff; d < goff+dof-cdof; ++d) { ierr = PetscSectionAddDof(sectionAdj, d, anDof);CHKERRQ(ierr); } } } ierr = PetscSectionSetUp(sectionAdj);CHKERRQ(ierr); if (debug) { ierr = PetscPrintf(comm, "Adjacency Section for Preallocation:\n");CHKERRQ(ierr); ierr = PetscSectionView(sectionAdj, PETSC_VIEWER_STDOUT_WORLD);CHKERRQ(ierr); } /* Get adjacent indices */ ierr = PetscSectionGetStorageSize(sectionAdj, &numCols);CHKERRQ(ierr); ierr = PetscMalloc1(numCols, &cols);CHKERRQ(ierr); for (p = pStart; p < pEnd; ++p) { PetscInt numAdj = PETSC_DETERMINE, dof, cdof, off, goff, d, q, anDof, anOff; PetscBool found = PETSC_TRUE; ierr = PetscSectionGetDof(section, p, &dof);CHKERRQ(ierr); ierr = PetscSectionGetConstraintDof(section, p, &cdof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(section, p, &off);CHKERRQ(ierr); ierr = PetscSectionGetOffset(sectionGlobal, p, &goff);CHKERRQ(ierr); for (d = 0; d < dof-cdof; ++d) { PetscInt ldof, rdof; ierr = PetscSectionGetDof(leafSectionAdj, off+d, &ldof);CHKERRQ(ierr); ierr = PetscSectionGetDof(rootSectionAdj, off+d, &rdof);CHKERRQ(ierr); if (ldof > 0) { /* We do not own this point */ } else if (rdof > 0) { PetscInt aoff, roff; ierr = PetscSectionGetOffset(sectionAdj, goff+d, &aoff);CHKERRQ(ierr); ierr = PetscSectionGetOffset(rootSectionAdj, off+d, &roff);CHKERRQ(ierr); ierr = PetscMemcpy(&cols[aoff], &rootAdj[roff], rdof * sizeof(PetscInt));CHKERRQ(ierr); } else { found = PETSC_FALSE; } } if (found) continue; ierr = DMPlexGetAdjacency(dm, p, &numAdj, &tmpAdj);CHKERRQ(ierr); ierr = PetscSectionGetDof(anchorSectionAdj, p, &anDof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(anchorSectionAdj, p, &anOff);CHKERRQ(ierr); for (d = goff; d < goff+dof-cdof; ++d) { PetscInt adof, aoff, i = 0; ierr = PetscSectionGetDof(sectionAdj, d, &adof);CHKERRQ(ierr); ierr = PetscSectionGetOffset(sectionAdj, d, &aoff);CHKERRQ(ierr); for (q = 0; q < numAdj; ++q) { const PetscInt padj = tmpAdj[q]; PetscInt ndof, ncdof, ngoff, nd; const PetscInt *ncind; /* Adjacent points may not be in the section chart */ if ((padj < pStart) || (padj >= pEnd)) continue; ierr = PetscSectionGetDof(section, padj, &ndof);CHKERRQ(ierr); ierr = PetscSectionGetConstraintDof(section, padj, &ncdof);CHKERRQ(ierr); ierr = PetscSectionGetConstraintIndices(section, padj, &ncind);CHKERRQ(ierr); ierr = PetscSectionGetOffset(sectionGlobal, padj, &ngoff);CHKERRQ(ierr); for (nd = 0; nd < ndof-ncdof; ++nd, ++i) { cols[aoff+i] = ngoff < 0 ? -(ngoff+1)+nd : ngoff+nd; } } for (q = 0; q < anDof; q++, i++) { cols[aoff+i] = anchorAdj[anOff + q]; } if (i != adof) SETERRQ4(PETSC_COMM_SELF, PETSC_ERR_PLIB, "Invalid number of entries %D != %D for dof %D (point %D)", i, adof, d, p); } } ierr = PetscSectionDestroy(&anchorSectionAdj);CHKERRQ(ierr); ierr = PetscSectionDestroy(&leafSectionAdj);CHKERRQ(ierr); ierr = PetscSectionDestroy(&rootSectionAdj);CHKERRQ(ierr); ierr = PetscFree(anchorAdj);CHKERRQ(ierr); ierr = PetscFree(rootAdj);CHKERRQ(ierr); ierr = PetscFree(tmpAdj);CHKERRQ(ierr); /* Debugging */ if (debug) { IS tmp; ierr = PetscPrintf(comm, "Column indices\n");CHKERRQ(ierr); ierr = ISCreateGeneral(comm, numCols, cols, PETSC_USE_POINTER, &tmp);CHKERRQ(ierr); ierr = ISView(tmp, NULL);CHKERRQ(ierr); ierr = ISDestroy(&tmp);CHKERRQ(ierr); } /* Create allocation vectors from adjacency graph */ ierr = MatGetLocalSize(A, &locRows, NULL);CHKERRQ(ierr); ierr = PetscLayoutCreate(PetscObjectComm((PetscObject)A), &rLayout);CHKERRQ(ierr); ierr = PetscLayoutSetLocalSize(rLayout, locRows);CHKERRQ(ierr); ierr = PetscLayoutSetBlockSize(rLayout, 1);CHKERRQ(ierr); ierr = PetscLayoutSetUp(rLayout);CHKERRQ(ierr); ierr = PetscLayoutGetRange(rLayout, &rStart, &rEnd);CHKERRQ(ierr); ierr = PetscLayoutDestroy(&rLayout);CHKERRQ(ierr); /* Only loop over blocks of rows */ if (rStart%bs || rEnd%bs) SETERRQ3(PetscObjectComm((PetscObject)A), PETSC_ERR_ARG_WRONG, "Invalid layout [%d, %d) for matrix, must be divisible by block size %d", rStart, rEnd, bs); for (r = rStart/bs; r < rEnd/bs; ++r) { const PetscInt row = r*bs; PetscInt numCols, cStart, c; ierr = PetscSectionGetDof(sectionAdj, row, &numCols);CHKERRQ(ierr); ierr = PetscSectionGetOffset(sectionAdj, row, &cStart);CHKERRQ(ierr); for (c = cStart; c < cStart+numCols; ++c) { if ((cols[c] >= rStart*bs) && (cols[c] < rEnd*bs)) { ++dnz[r-rStart]; if (cols[c] >= row) ++dnzu[r-rStart]; } else { ++onz[r-rStart]; if (cols[c] >= row) ++onzu[r-rStart]; } } } if (bs > 1) { for (r = 0; r < locRows/bs; ++r) { dnz[r] /= bs; onz[r] /= bs; dnzu[r] /= bs; onzu[r] /= bs; } } /* Set matrix pattern */ ierr = MatXAIJSetPreallocation(A, bs, dnz, onz, dnzu, onzu);CHKERRQ(ierr); ierr = MatSetOption(A, MAT_NEW_NONZERO_ALLOCATION_ERR,PETSC_TRUE);CHKERRQ(ierr); /* Check for symmetric storage */ ierr = MatGetType(A, &mtype);CHKERRQ(ierr); ierr = PetscStrcmp(mtype, MATSBAIJ, &isSymBlock);CHKERRQ(ierr); ierr = PetscStrcmp(mtype, MATSEQSBAIJ, &isSymSeqBlock);CHKERRQ(ierr); ierr = PetscStrcmp(mtype, MATMPISBAIJ, &isSymMPIBlock);CHKERRQ(ierr); if (isSymBlock || isSymSeqBlock || isSymMPIBlock) {ierr = MatSetOption(A, MAT_IGNORE_LOWER_TRIANGULAR, PETSC_TRUE);CHKERRQ(ierr);} /* Fill matrix with zeros */ if (fillMatrix) { PetscScalar *values; PetscInt maxRowLen = 0; for (r = rStart; r < rEnd; ++r) { PetscInt len; ierr = PetscSectionGetDof(sectionAdj, r, &len);CHKERRQ(ierr); maxRowLen = PetscMax(maxRowLen, len); } ierr = PetscCalloc1(maxRowLen, &values);CHKERRQ(ierr); for (r = rStart; r < rEnd; ++r) { PetscInt numCols, cStart; ierr = PetscSectionGetDof(sectionAdj, r, &numCols);CHKERRQ(ierr); ierr = PetscSectionGetOffset(sectionAdj, r, &cStart);CHKERRQ(ierr); ierr = MatSetValues(A, 1, &r, numCols, &cols[cStart], values, INSERT_VALUES);CHKERRQ(ierr); } ierr = PetscFree(values);CHKERRQ(ierr); ierr = MatAssemblyBegin(A, MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); ierr = MatAssemblyEnd(A, MAT_FINAL_ASSEMBLY);CHKERRQ(ierr); } /* restore original useAnchors */ ierr = DMPlexSetAdjacencyUseAnchors(dm,useAnchors);CHKERRQ(ierr); ierr = PetscSectionDestroy(§ionAdj);CHKERRQ(ierr); ierr = PetscFree(cols);CHKERRQ(ierr); ierr = PetscLogEventEnd(DMPLEX_Preallocate,dm,0,0,0);CHKERRQ(ierr); PetscFunctionReturn(0); }
PETSC_EXTERN PetscErrorCode MatColoringCreateBipartiteGraph(MatColoring mc,PetscSF *etoc,PetscSF *etor) { PetscErrorCode ierr; PetscInt nentries,ncolentries,idx; PetscInt i,j,rs,re,cs,ce,cn; PetscInt *rowleaf,*colleaf,*rowdata; PetscInt ncol; const PetscScalar *vcol; const PetscInt *icol; const PetscInt *coldegrees,*rowdegrees; Mat m = mc->mat; PetscFunctionBegin; ierr = MatGetOwnershipRange(m,&rs,&re);CHKERRQ(ierr); ierr = MatGetOwnershipRangeColumn(m,&cs,&ce);CHKERRQ(ierr); cn = ce-cs; nentries=0; for (i=rs;i<re;i++) { ierr = MatGetRow(m,i,&ncol,NULL,&vcol);CHKERRQ(ierr); for (j=0;j<ncol;j++) { nentries++; } ierr = MatRestoreRow(m,i,&ncol,NULL,&vcol);CHKERRQ(ierr); } ierr = PetscMalloc(sizeof(PetscInt)*nentries,&rowleaf);CHKERRQ(ierr); ierr = PetscMalloc(sizeof(PetscInt)*nentries,&rowdata);CHKERRQ(ierr); idx=0; for (i=rs;i<re;i++) { ierr = MatGetRow(m,i,&ncol,&icol,&vcol);CHKERRQ(ierr); for (j=0;j<ncol;j++) { rowleaf[idx] = icol[j]; rowdata[idx] = i; idx++; } ierr = MatRestoreRow(m,i,&ncol,&icol,&vcol);CHKERRQ(ierr); } if (idx != nentries) SETERRQ2(PetscObjectComm((PetscObject)m),PETSC_ERR_NOT_CONVERGED,"Bad number of entries %d vs %d",idx,nentries); ierr = PetscSFCreate(PetscObjectComm((PetscObject)m),etoc);CHKERRQ(ierr); ierr = PetscSFCreate(PetscObjectComm((PetscObject)m),etor);CHKERRQ(ierr); ierr = PetscSFSetGraphLayout(*etoc,m->cmap,nentries,NULL,PETSC_COPY_VALUES,rowleaf);CHKERRQ(ierr); ierr = PetscSFSetFromOptions(*etoc);CHKERRQ(ierr); /* determine the number of entries in the column matrix */ ierr = PetscLogEventBegin(Mat_Coloring_Comm,*etoc,0,0,0);CHKERRQ(ierr); ierr = PetscSFComputeDegreeBegin(*etoc,&coldegrees);CHKERRQ(ierr); ierr = PetscSFComputeDegreeEnd(*etoc,&coldegrees);CHKERRQ(ierr); ierr = PetscLogEventEnd(Mat_Coloring_Comm,*etoc,0,0,0);CHKERRQ(ierr); ncolentries=0; for (i=0;i<cn;i++) { ncolentries += coldegrees[i]; } ierr = PetscMalloc(sizeof(PetscInt)*ncolentries,&colleaf);CHKERRQ(ierr); /* create the one going the other way by building the leaf set */ ierr = PetscLogEventBegin(Mat_Coloring_Comm,*etoc,0,0,0);CHKERRQ(ierr); ierr = PetscSFGatherBegin(*etoc,MPIU_INT,rowdata,colleaf);CHKERRQ(ierr); ierr = PetscSFGatherEnd(*etoc,MPIU_INT,rowdata,colleaf);CHKERRQ(ierr); ierr = PetscLogEventEnd(Mat_Coloring_Comm,*etoc,0,0,0);CHKERRQ(ierr); /* this one takes mat entries in *columns* to rows -- you never have to actually be able to order the leaf entries. */ ierr = PetscSFSetGraphLayout(*etor,m->rmap,ncolentries,NULL,PETSC_COPY_VALUES,colleaf);CHKERRQ(ierr); ierr = PetscSFSetFromOptions(*etor);CHKERRQ(ierr); ierr = PetscLogEventBegin(Mat_Coloring_Comm,*etor,0,0,0);CHKERRQ(ierr); ierr = PetscSFComputeDegreeBegin(*etor,&rowdegrees);CHKERRQ(ierr); ierr = PetscSFComputeDegreeEnd(*etor,&rowdegrees);CHKERRQ(ierr); ierr = PetscLogEventEnd(Mat_Coloring_Comm,*etor,0,0,0);CHKERRQ(ierr); ierr = PetscFree(rowdata);CHKERRQ(ierr); ierr = PetscFree(rowleaf);CHKERRQ(ierr); ierr = PetscFree(colleaf);CHKERRQ(ierr); PetscFunctionReturn(0); }