43 #ifndef IFPACK2_SINGLETONFILTER_DEF_HPP
44 #define IFPACK2_SINGLETONFILTER_DEF_HPP
45 #include "Ifpack2_SingletonFilter_decl.hpp"
47 #include "Tpetra_ConfigDefs.hpp"
48 #include "Tpetra_RowMatrix.hpp"
49 #include "Tpetra_Map.hpp"
50 #include "Tpetra_MultiVector.hpp"
51 #include "Tpetra_Vector.hpp"
55 template<
class MatrixType>
66 if (A_->getComm()->getSize() != 1 || A_->getLocalNumRows() != A_->getGlobalNumRows()) {
67 throw std::runtime_error(
"Ifpack2::SingeltonFilter can be used with Comm().getSize() == 1 only. This class is a tool for Ifpack2_AdditiveSchwarz, and it is not meant to be used otherwise.");
71 size_t NumRowsA_ = A_->getLocalNumRows();
75 MaxNumEntriesA_ = A_->getLocalMaxNumRowEntries();
78 Kokkos::resize(Indices_,MaxNumEntriesA_);
79 Kokkos::resize(Values_,MaxNumEntriesA_);
82 Reorder_.resize(NumRowsA_);
83 Reorder_.assign(Reorder_.size(),-1);
87 for (
size_t i = 0 ; i < NumRowsA_ ; ++i) {
89 A_->getLocalRowCopy(i,Indices_,Values_,Nnz);
91 Reorder_[i] = NumRows_++;
99 InvReorder_.resize(NumRows_);
100 for (
size_t i = 0 ; i < NumRowsA_ ; ++i) {
103 InvReorder_[Reorder_[i]] = i;
105 NumEntries_.resize(NumRows_);
106 SingletonIndex_.resize(NumSingletons_);
111 for (
size_t i = 0 ; i < NumRowsA_ ; ++i) {
113 A_->getLocalRowCopy(i,Indices_,Values_,Nnz);
114 LocalOrdinal ii = Reorder_[i];
116 NumEntries_[ii] = Nnz;
118 if (Nnz > MaxNumEntries_)
119 MaxNumEntries_ = Nnz;
122 SingletonIndex_[count] = i;
128 ReducedMap_ =
Teuchos::rcp(
new Tpetra::Map<LocalOrdinal,GlobalOrdinal,Node>(NumRows_,0,A_->getComm()) );
131 Diagonal_ =
Teuchos::rcp(
new Tpetra::Vector<Scalar,LocalOrdinal,GlobalOrdinal,Node>(ReducedMap_) );
133 Tpetra::Vector<Scalar,LocalOrdinal,GlobalOrdinal,Node> DiagonalA(A_->getRowMap());
134 A_->getLocalDiagCopy(DiagonalA);
136 for (
size_t i = 0 ; i < NumRows_ ; ++i) {
137 LocalOrdinal ii = InvReorder_[i];
138 Diagonal_->replaceLocalValue((LocalOrdinal)i,DiagonalAview[ii]);
142 template<
class MatrixType>
145 template<
class MatrixType>
149 return A_->getComm();
153 template<
class MatrixType>
154 Teuchos::RCP<
const Tpetra::Map<
typename MatrixType::local_ordinal_type,
155 typename MatrixType::global_ordinal_type,
156 typename MatrixType::node_type> >
162 template<
class MatrixType>
163 Teuchos::RCP<
const Tpetra::Map<
typename MatrixType::local_ordinal_type,
164 typename MatrixType::global_ordinal_type,
165 typename MatrixType::node_type> >
171 template<
class MatrixType>
172 Teuchos::RCP<
const Tpetra::Map<
typename MatrixType::local_ordinal_type,
173 typename MatrixType::global_ordinal_type,
174 typename MatrixType::node_type> >
180 template<
class MatrixType>
181 Teuchos::RCP<
const Tpetra::Map<
typename MatrixType::local_ordinal_type,
182 typename MatrixType::global_ordinal_type,
183 typename MatrixType::node_type> >
189 template<
class MatrixType>
190 Teuchos::RCP<
const Tpetra::RowGraph<
typename MatrixType::local_ordinal_type,
191 typename MatrixType::global_ordinal_type,
192 typename MatrixType::node_type> >
195 throw std::runtime_error(
"Ifpack2::SingletonFilter: does not support getGraph.");
198 template<
class MatrixType>
204 template<
class MatrixType>
210 template<
class MatrixType>
216 template<
class MatrixType>
222 template<
class MatrixType>
225 return A_->getIndexBase();
228 template<
class MatrixType>
234 template<
class MatrixType>
240 template<
class MatrixType>
243 throw std::runtime_error(
"Ifpack2::SingletonFilter does not implement getNumEntriesInGlobalRow.");
246 template<
class MatrixType>
249 return NumEntries_[localRow];
252 template<
class MatrixType>
255 return MaxNumEntries_;
258 template<
class MatrixType>
261 return MaxNumEntries_;
264 template<
class MatrixType>
267 return A_->getBlockSize();
270 template<
class MatrixType>
276 template<
class MatrixType>
279 return A_->isLocallyIndexed();
282 template<
class MatrixType>
285 return A_->isGloballyIndexed();
288 template<
class MatrixType>
291 return A_->isFillComplete();
294 template<
class MatrixType>
297 nonconst_global_inds_host_view_type &,
298 nonconst_values_host_view_type &,
301 throw std::runtime_error(
"Ifpack2::SingletonFilter does not implement getGlobalRowCopy.");
305 template<
class MatrixType>
308 nonconst_local_inds_host_view_type &Indices,
309 nonconst_values_host_view_type &Values,
310 size_t& NumEntries)
const
312 TEUCHOS_TEST_FOR_EXCEPTION((LocalRow < 0 || (
size_t) LocalRow >= NumRows_ || (
size_t) Indices.size() < NumEntries_[LocalRow]), std::runtime_error,
"Ifpack2::SingletonFilter::getLocalRowCopy invalid row or array size.");
315 LocalOrdinal ARow = InvReorder_[LocalRow];
316 A_->getLocalRowCopy(ARow,Indices_,Values_,Nnz);
320 for (
size_t i = 0 ; i < Nnz ; ++i) {
321 LocalOrdinal ii = Reorder_[Indices_[i]];
323 Indices[NumEntries] = ii;
324 Values[NumEntries] = Values_[i];
331 template<
class MatrixType>
333 global_inds_host_view_type &,
334 values_host_view_type &)
const
336 throw std::runtime_error(
"Ifpack2::SingletonFilter: does not support getGlobalRowView.");
340 template<
class MatrixType>
342 local_inds_host_view_type & ,
343 values_host_view_type & )
const
345 throw std::runtime_error(
"Ifpack2::SingletonFilter: does not support getLocalRowView.");
349 template<
class MatrixType>
353 return A_->getLocalDiagCopy(diag);
356 template<
class MatrixType>
359 throw std::runtime_error(
"Ifpack2::SingletonFilter does not support leftScale.");
362 template<
class MatrixType>
365 throw std::runtime_error(
"Ifpack2::SingletonFilter does not support rightScale.");
368 template<
class MatrixType>
370 Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> &Y,
375 typedef Scalar DomainScalar;
376 typedef Scalar RangeScalar;
381 "Ifpack2::SingletonFilter::apply ERROR: X.getNumVectors() != Y.getNumVectors().");
388 size_t NumVectors = Y.getNumVectors();
391 for (
size_t i = 0 ; i < NumRows_ ; ++i) {
394 getLocalRowCopy(i,Indices_,Values_,Nnz);
396 for (
size_t j = 0 ; j < Nnz ; ++j)
397 for (
size_t k = 0 ; k < NumVectors ; ++k)
398 y_ptr[k][i] += (RangeScalar)Values_[j] * (RangeScalar)x_ptr[k][Indices_[j]];
401 for (
size_t j = 0 ; j < Nnz ; ++j)
402 for (
size_t k = 0 ; k < NumVectors ; ++k)
403 y_ptr[k][Indices_[j]] += (RangeScalar)Values_[j] * (RangeScalar)x_ptr[k][i];
406 for (
size_t j = 0 ; j < Nnz ; ++j)
407 for (
size_t k = 0 ; k < NumVectors ; ++k)
413 template<
class MatrixType>
419 template<
class MatrixType>
425 template<
class MatrixType>
427 Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>& LHS)
429 this->
template SolveSingletonsTempl<Scalar,Scalar>(RHS, LHS);
432 template<
class MatrixType>
433 template<
class DomainScalar,
class RangeScalar>
435 Tpetra::MultiVector<RangeScalar,LocalOrdinal,GlobalOrdinal,Node>& LHS)
440 for (
size_t i = 0 ; i < NumSingletons_ ; ++i) {
441 LocalOrdinal ii = SingletonIndex_[i];
444 A_->getLocalRowCopy(ii,Indices_,Values_,Nnz);
445 for (
size_t j = 0 ; j < Nnz ; ++j) {
446 if (Indices_[j] == ii) {
447 for (
size_t k = 0 ; k < LHS.getNumVectors() ; ++k)
448 LHS_ptr[k][ii] = (RangeScalar)RHS_ptr[k][ii] / (RangeScalar)Values_[j];
454 template<
class MatrixType>
456 const Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>& RHS,
457 Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>& ReducedRHS)
459 this->
template CreateReducedRHSTempl<Scalar,Scalar>(LHS, RHS, ReducedRHS);
462 template<
class MatrixType>
463 template<
class DomainScalar,
class RangeScalar>
465 const Tpetra::MultiVector<RangeScalar,LocalOrdinal,GlobalOrdinal,Node>& RHS,
466 Tpetra::MultiVector<RangeScalar,LocalOrdinal,GlobalOrdinal,Node>& ReducedRHS)
472 size_t NumVectors = LHS.getNumVectors();
474 for (
size_t i = 0 ; i < NumRows_ ; ++i)
475 for (
size_t k = 0 ; k < NumVectors ; ++k)
476 ReducedRHS_ptr[k][i] = RHS_ptr[k][InvReorder_[i]];
478 for (
size_t i = 0 ; i < NumRows_ ; ++i) {
479 LocalOrdinal ii = InvReorder_[i];
481 A_->getLocalRowCopy(ii,Indices_,Values_,Nnz);
483 for (
size_t j = 0 ; j < Nnz ; ++j) {
484 if (Reorder_[Indices_[j]] == -1) {
485 for (
size_t k = 0 ; k < NumVectors ; ++k)
486 ReducedRHS_ptr[k][i] -= (RangeScalar)Values_[j] * (RangeScalar)LHS_ptr[k][Indices_[j]];
492 template<
class MatrixType>
494 Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node>& LHS)
496 this->
template UpdateLHSTempl<Scalar,Scalar>(ReducedLHS, LHS);
499 template<
class MatrixType>
500 template<
class DomainScalar,
class RangeScalar>
502 Tpetra::MultiVector<RangeScalar,LocalOrdinal,GlobalOrdinal,Node>& LHS)
508 for (
size_t i = 0 ; i < NumRows_ ; ++i)
509 for (
size_t k = 0 ; k < LHS.getNumVectors() ; ++k)
510 LHS_ptr[k][InvReorder_[i]] = (RangeScalar)ReducedLHS_ptr[k][i];
513 template<
class MatrixType>
516 throw std::runtime_error(
"Ifpack2::SingletonFilter does not implement getFrobeniusNorm.");
521 #define IFPACK2_SINGLETONFILTER_INSTANT(S,LO,GO,N) \
522 template class Ifpack2::SingletonFilter< Tpetra::RowMatrix<S, LO, GO, N> >;
virtual bool hasTransposeApply() const
Indicates whether this operator supports applying the adjoint operator.
Definition: Ifpack2_SingletonFilter_def.hpp:414
virtual mag_type getFrobeniusNorm() const
Returns the Frobenius norm of the matrix.
Definition: Ifpack2_SingletonFilter_def.hpp:514
virtual void rightScale(const Tpetra::Vector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &x)
Scales the RowMatrix on the right with the Vector x.
Definition: Ifpack2_SingletonFilter_def.hpp:363
virtual ~SingletonFilter()
Destructor.
Definition: Ifpack2_SingletonFilter_def.hpp:143
virtual Teuchos::RCP< const Tpetra::RowGraph< LocalOrdinal, GlobalOrdinal, Node > > getGraph() const
Returns the RowGraph associated with this matrix.
Definition: Ifpack2_SingletonFilter_def.hpp:193
virtual void getLocalRowCopy(LocalOrdinal LocalRow, nonconst_local_inds_host_view_type &Indices, nonconst_values_host_view_type &Values, size_t &NumEntries) const
Extract a list of entries in a specified local row of the graph. Put into storage allocated by callin...
Definition: Ifpack2_SingletonFilter_def.hpp:307
virtual void UpdateLHS(const Tpetra::MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &ReducedLHS, Tpetra::MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &LHS)
Updates a full LHS from a reduces LHS.
Definition: Ifpack2_SingletonFilter_def.hpp:493
virtual LocalOrdinal getBlockSize() const
The number of degrees of freedom per mesh point.
Definition: Ifpack2_SingletonFilter_def.hpp:265
virtual Teuchos::RCP< const Tpetra::Map< LocalOrdinal, GlobalOrdinal, Node > > getRowMap() const
Returns the Map that describes the row distribution in this matrix.
Definition: Ifpack2_SingletonFilter_def.hpp:157
virtual void CreateReducedRHS(const Tpetra::MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &LHS, const Tpetra::MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &RHS, Tpetra::MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &ReducedRHS)
Creates a RHS for the reduced singleton-free system.
Definition: Ifpack2_SingletonFilter_def.hpp:455
virtual size_t getLocalMaxNumRowEntries() const
Returns the maximum number of entries across all rows/columns on this node.
Definition: Ifpack2_SingletonFilter_def.hpp:259
#define TEUCHOS_TEST_FOR_EXCEPTION(throw_exception_test, Exception, msg)
virtual Teuchos::RCP< const Tpetra::Map< LocalOrdinal, GlobalOrdinal, Node > > getDomainMap() const
Returns the Map that describes the domain distribution in this matrix.
Definition: Ifpack2_SingletonFilter_def.hpp:175
virtual bool supportsRowViews() const
Returns true if RowViews are supported.
Definition: Ifpack2_SingletonFilter_def.hpp:420
virtual global_size_t getGlobalNumRows() const
Returns the number of global rows in this matrix.
Definition: Ifpack2_SingletonFilter_def.hpp:199
virtual void getGlobalRowCopy(GlobalOrdinal GlobalRow, nonconst_global_inds_host_view_type &Indices, nonconst_values_host_view_type &Values, size_t &NumEntries) const
Extract a list of entries in a specified global row of this matrix. Put into pre-allocated storage...
Definition: Ifpack2_SingletonFilter_def.hpp:296
virtual GlobalOrdinal getIndexBase() const
Returns the index base for global indices for this matrix.
Definition: Ifpack2_SingletonFilter_def.hpp:223
virtual bool isFillComplete() const
Returns true if fillComplete() has been called.
Definition: Ifpack2_SingletonFilter_def.hpp:289
virtual global_size_t getGlobalNumCols() const
Returns the number of global columns in this matrix.
Definition: Ifpack2_SingletonFilter_def.hpp:205
virtual Teuchos::RCP< const Tpetra::Map< LocalOrdinal, GlobalOrdinal, Node > > getRangeMap() const
Returns the Map that describes the range distribution in this matrix.
Definition: Ifpack2_SingletonFilter_def.hpp:184
TEUCHOS_DEPRECATED RCP< T > rcp(T *p, Dealloc_T dealloc, bool owns_mem)
virtual bool isGloballyIndexed() const
If matrix indices are in the global range, this function returns true. Otherwise, this function retur...
Definition: Ifpack2_SingletonFilter_def.hpp:283
virtual global_size_t getGlobalNumEntries() const
Returns the global number of entries in this matrix.
Definition: Ifpack2_SingletonFilter_def.hpp:229
virtual bool hasColMap() const
Indicates whether this matrix has a well-defined column map.
Definition: Ifpack2_SingletonFilter_def.hpp:271
virtual bool isLocallyIndexed() const
If matrix indices are in the local range, this function returns true. Otherwise, this function return...
Definition: Ifpack2_SingletonFilter_def.hpp:277
virtual void getLocalRowView(LocalOrdinal LocalRow, local_inds_host_view_type &indices, values_host_view_type &values) const
Extract a const, non-persisting view of local indices in a specified row of the matrix.
Definition: Ifpack2_SingletonFilter_def.hpp:341
virtual size_t getNumEntriesInLocalRow(LocalOrdinal localRow) const
Returns the current number of entries on this node in the specified local row.
Definition: Ifpack2_SingletonFilter_def.hpp:247
virtual size_t getNumEntriesInGlobalRow(GlobalOrdinal globalRow) const
Returns the current number of entries on this node in the specified global row.
Definition: Ifpack2_SingletonFilter_def.hpp:241
virtual size_t getLocalNumCols() const
Returns the number of columns needed to apply the forward operator on this node, i.e., the number of elements listed in the column map.
Definition: Ifpack2_SingletonFilter_def.hpp:217
virtual size_t getLocalNumEntries() const
Returns the local number of entries in this matrix.
Definition: Ifpack2_SingletonFilter_def.hpp:235
virtual size_t getLocalNumRows() const
Returns the number of rows owned on the calling node.
Definition: Ifpack2_SingletonFilter_def.hpp:211
virtual size_t getGlobalMaxNumRowEntries() const
Returns the maximum number of entries across all rows/columns on all nodes.
Definition: Ifpack2_SingletonFilter_def.hpp:253
virtual void getLocalDiagCopy(Tpetra::Vector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &diag) const
Get a copy of the diagonal entries owned by this node, with local row indices.
Definition: Ifpack2_SingletonFilter_def.hpp:350
virtual void getGlobalRowView(GlobalOrdinal GlobalRow, global_inds_host_view_type &indices, values_host_view_type &values) const
Extract a const, non-persisting view of global indices in a specified row of the matrix.
Definition: Ifpack2_SingletonFilter_def.hpp:332
SingletonFilter(const Teuchos::RCP< const Tpetra::RowMatrix< Scalar, LocalOrdinal, GlobalOrdinal, Node > > &Matrix)
Constructor.
Definition: Ifpack2_SingletonFilter_def.hpp:56
virtual Teuchos::RCP< const Teuchos::Comm< int > > getComm() const
Returns the communicator.
Definition: Ifpack2_SingletonFilter_def.hpp:147
virtual void apply(const Tpetra::MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &X, Tpetra::MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &Y, Teuchos::ETransp mode=Teuchos::NO_TRANS, Scalar alpha=Teuchos::ScalarTraits< Scalar >::one(), Scalar beta=Teuchos::ScalarTraits< Scalar >::zero()) const
Computes the operator-multivector application.
Definition: Ifpack2_SingletonFilter_def.hpp:369
virtual void SolveSingletons(const Tpetra::MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &RHS, Tpetra::MultiVector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &LHS)
Solve the singleton components of the linear system.
Definition: Ifpack2_SingletonFilter_def.hpp:426
virtual Teuchos::RCP< const Tpetra::Map< LocalOrdinal, GlobalOrdinal, Node > > getColMap() const
Returns the Map that describes the column distribution in this matrix.
Definition: Ifpack2_SingletonFilter_def.hpp:166
Filter based on matrix entries.
Definition: Ifpack2_SingletonFilter_decl.hpp:64
virtual void leftScale(const Tpetra::Vector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &x)
Scales the RowMatrix on the left with the Vector x.
Definition: Ifpack2_SingletonFilter_def.hpp:357