/usr/include/trilinos/MueLu_AmalgamationInfo_def.hpp is in libtrilinos-muelu-dev 12.12.1-5.
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//
// ***********************************************************************
//
// MueLu: A package for multigrid based preconditioning
// Copyright 2012 Sandia Corporation
//
// Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
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// Questions? Contact
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// @HEADER
/*
* MueLu_AmalgamationInfo_def.hpp
*
* Created on: Mar 28, 2012
* Author: wiesner
*/
#ifndef MUELU_AMALGAMATIONINFO_DEF_HPP_
#define MUELU_AMALGAMATIONINFO_DEF_HPP_
#include <Xpetra_MapFactory.hpp>
#include <Xpetra_Vector.hpp>
#include "MueLu_AmalgamationInfo_decl.hpp"
#include "MueLu_Exceptions.hpp"
#include "MueLu_Aggregates.hpp"
namespace MueLu {
template <class LocalOrdinal, class GlobalOrdinal, class Node>
void AmalgamationInfo<LocalOrdinal, GlobalOrdinal, Node>::UnamalgamateAggregates(const Aggregates& aggregates,
Teuchos::ArrayRCP<LocalOrdinal>& aggStart, Teuchos::ArrayRCP<GlobalOrdinal>& aggToRowMap) const {
int myPid = aggregates.GetMap()->getComm()->getRank();
Teuchos::ArrayView<const GO> nodeGlobalElts = aggregates.GetMap()->getNodeElementList();
Teuchos::ArrayRCP<LO> procWinner = aggregates.GetProcWinner()->getDataNonConst(0);
Teuchos::ArrayRCP<LO> vertex2AggId = aggregates.GetVertex2AggId()->getDataNonConst(0);
LO size = procWinner.size();
GO numAggregates = aggregates.GetNumAggregates();
std::vector<LO> sizes(numAggregates);
if (stridedblocksize_ == 1) {
for (LO lnode = 0; lnode < size; ++lnode) {
LO myAgg = vertex2AggId[lnode];
if (procWinner[lnode] == myPid)
sizes[myAgg] += 1;
}
} else {
for (LO lnode = 0; lnode < size; ++lnode) {
LO myAgg = vertex2AggId[lnode];
if (procWinner[lnode] == myPid) {
GO gnodeid = nodeGlobalElts[lnode];
for (LocalOrdinal k = 0; k < stridedblocksize_; k++) {
GlobalOrdinal gDofIndex = ComputeGlobalDOF(gnodeid,k);
if (columnMap_->isNodeGlobalElement(gDofIndex))
sizes[myAgg] += 1;
}
}
}
}
aggStart = ArrayRCP<LO>(numAggregates+1,0);
aggStart[0]=0;
for (GO i=0; i<numAggregates; ++i) {
aggStart[i+1] = aggStart[i] + sizes[i];
}
aggToRowMap = ArrayRCP<GO>(aggStart[numAggregates],0);
// count, how many dofs have been recorded for each aggregate so far
Array<LO> numDofs(numAggregates, 0); // empty array with number of Dofs for each aggregate
if (stridedblocksize_ == 1) {
for (LO lnode = 0; lnode < size; ++lnode) {
LO myAgg = vertex2AggId[lnode];
if (procWinner[lnode] == myPid) {
aggToRowMap[ aggStart[myAgg] + numDofs[myAgg] ] = ComputeGlobalDOF(nodeGlobalElts[lnode]);
++(numDofs[myAgg]);
}
}
} else {
for (LO lnode = 0; lnode < size; ++lnode) {
LO myAgg = vertex2AggId[lnode];
if (procWinner[lnode] == myPid) {
GO gnodeid = nodeGlobalElts[lnode];
for (LocalOrdinal k = 0; k < stridedblocksize_; k++) {
GlobalOrdinal gDofIndex = ComputeGlobalDOF(gnodeid,k);
if (columnMap_->isNodeGlobalElement(gDofIndex)) {
aggToRowMap[ aggStart[myAgg] + numDofs[myAgg] ] = gDofIndex;
++(numDofs[myAgg]);
}
}
}
}
}
// todo plausibility check: entry numDofs[k] == aggToRowMap[k].size()
} //UnamalgamateAggregates
template <class LocalOrdinal, class GlobalOrdinal, class Node>
void AmalgamationInfo<LocalOrdinal, GlobalOrdinal, Node>::UnamalgamateAggregatesLO(const Aggregates& aggregates,
Teuchos::ArrayRCP<LO>& aggStart, Teuchos::ArrayRCP<LO>& aggToRowMap) const {
int myPid = aggregates.GetMap()->getComm()->getRank();
Teuchos::ArrayView<const GO> nodeGlobalElts = aggregates.GetMap()->getNodeElementList();
Teuchos::ArrayRCP<LO> procWinner = aggregates.GetProcWinner() ->getDataNonConst(0);
Teuchos::ArrayRCP<LO> vertex2AggId = aggregates.GetVertex2AggId()->getDataNonConst(0);
const GO numAggregates = aggregates.GetNumAggregates();
// FIXME: Do we need to compute size here? Or can we use existing?
LO size = procWinner.size();
std::vector<LO> sizes(numAggregates);
if (stridedblocksize_ == 1) {
for (LO lnode = 0; lnode < size; lnode++)
if (procWinner[lnode] == myPid)
sizes[vertex2AggId[lnode]]++;
} else {
for (LO lnode = 0; lnode < size; lnode++)
if (procWinner[lnode] == myPid) {
GO nodeGID = nodeGlobalElts[lnode];
for (LO k = 0; k < stridedblocksize_; k++) {
GO GID = ComputeGlobalDOF(nodeGID, k);
if (columnMap_->isNodeGlobalElement(GID))
sizes[vertex2AggId[lnode]]++;
}
}
}
aggStart = ArrayRCP<LO>(numAggregates+1); // FIXME: useless initialization with zeros
aggStart[0] = 0;
for (GO i = 0; i < numAggregates; i++)
aggStart[i+1] = aggStart[i] + sizes[i];
aggToRowMap = ArrayRCP<LO>(aggStart[numAggregates], 0);
// count, how many dofs have been recorded for each aggregate so far
Array<LO> numDofs(numAggregates, 0); // empty array with number of DOFs for each aggregate
if (stridedblocksize_ == 1) {
for (LO lnode = 0; lnode < size; ++lnode)
if (procWinner[lnode] == myPid) {
LO myAgg = vertex2AggId[lnode];
aggToRowMap[aggStart[myAgg] + numDofs[myAgg]] = lnode;
numDofs[myAgg]++;
}
} else {
for (LO lnode = 0; lnode < size; ++lnode)
if (procWinner[lnode] == myPid) {
LO myAgg = vertex2AggId[lnode];
GO nodeGID = nodeGlobalElts[lnode];
for (LO k = 0; k < stridedblocksize_; k++) {
GO GID = ComputeGlobalDOF(nodeGID, k);
if (columnMap_->isNodeGlobalElement(GID)) {
aggToRowMap[aggStart[myAgg] + numDofs[myAgg]] = lnode*stridedblocksize_ + k;
numDofs[myAgg]++;
}
}
}
}
// todo plausibility check: entry numDofs[k] == aggToRowMap[k].size()
} //UnamalgamateAggregates
/////////////////////////////////////////////////////////////////////////////
template <class LocalOrdinal, class GlobalOrdinal, class Node>
RCP<Xpetra::Map<LocalOrdinal, GlobalOrdinal, Node> > AmalgamationInfo<LocalOrdinal, GlobalOrdinal, Node>::ComputeUnamalgamatedImportDofMap(const Aggregates& aggregates) const {
Teuchos::RCP<const Map> nodeMap = aggregates.GetMap();
Teuchos::RCP<std::vector<GO> > myDofGids = Teuchos::rcp(new std::vector<GO>);
Teuchos::ArrayView<const GO> gEltList = nodeMap->getNodeElementList();
LO nodeElements = Teuchos::as<LO>(nodeMap->getNodeNumElements());
if (stridedblocksize_ == 1) {
for (LO n = 0; n<nodeElements; n++) {
GlobalOrdinal gDofIndex = ComputeGlobalDOF(gEltList[n]);
myDofGids->push_back(gDofIndex);
}
} else {
for (LO n = 0; n<nodeElements; n++) {
for (LocalOrdinal k = 0; k < stridedblocksize_; k++) {
GlobalOrdinal gDofIndex = ComputeGlobalDOF(gEltList[n],k);
if (columnMap_->isNodeGlobalElement(gDofIndex))
myDofGids->push_back(gDofIndex);
}
}
}
Teuchos::ArrayRCP<GO> arr_myDofGids = Teuchos::arcp( myDofGids );
Teuchos::RCP<Map> importDofMap = MapFactory::Build(aggregates.GetMap()->lib(), Teuchos::OrdinalTraits<Xpetra::global_size_t>::invalid(), arr_myDofGids(), aggregates.GetMap()->getIndexBase(), aggregates.GetMap()->getComm());
return importDofMap;
}
/////////////////////////////////////////////////////////////////////////////
template <class LocalOrdinal, class GlobalOrdinal, class Node>
GlobalOrdinal AmalgamationInfo<LocalOrdinal, GlobalOrdinal, Node>::ComputeGlobalDOF(GlobalOrdinal const &gNodeID, LocalOrdinal const &k) const {
// here, the assumption is, that the node map has the same indexBase as the dof map
// this is the node map index base this is the dof map index base
GlobalOrdinal gDofIndex = offset_ + (gNodeID-indexBase_)*fullblocksize_ + nStridedOffset_ + k + indexBase_;
return gDofIndex;
}
} //namespace
#endif /* MUELU_AMALGAMATIONINFO_DEF_HPP_ */
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