43 #ifndef IFPACK2_SPARSITYFILTER_DEF_HPP
44 #define IFPACK2_SPARSITYFILTER_DEF_HPP
46 #include "Tpetra_Map.hpp"
47 #include "Tpetra_MultiVector.hpp"
48 #include "Tpetra_Vector.hpp"
56 template<
class MatrixType>
58 size_t AllowedNumEntries,
59 LocalOrdinal AllowedBandwidth):
61 AllowedNumEntries_(AllowedNumEntries),
62 AllowedBandwidth_(AllowedBandwidth),
71 A_->getComm()->getSize() != 1 || A_->getNodeNumRows() != A_->getGlobalNumRows(),
72 std::runtime_error,
"Ifpack2::SparsityFilter: "
73 "This class may only be used when A.getComm()->getSize() == 1.");
76 NumRows_ = A_->getNodeNumRows();
81 NumEntries_.resize(NumRows_);
85 MaxNumEntries_ = A_->getNodeMaxNumRowEntries();
86 MaxNumEntriesA_ = A_->getNodeMaxNumRowEntries();
89 Indices_.
resize(MaxNumEntries_);
90 Values_.
resize(MaxNumEntries_);
92 size_t ActualMaxNumEntries = 0;
93 for (
size_t i = 0 ; i < NumRows_ ; ++i) {
94 NumEntries_[i] = MaxNumEntriesA_;
96 A_->getLocalRowCopy(i,Indices_,Values_,Nnz);
100 if (Nnz > ActualMaxNumEntries)
101 ActualMaxNumEntries = Nnz;
104 MaxNumEntries_ = ActualMaxNumEntries;
108 template<
class MatrixType>
112 template<
class MatrixType>
115 return A_->getComm();
118 #ifdef TPETRA_ENABLE_DEPRECATED_CODE
120 template<
class MatrixType>
124 return Teuchos::null;
126 #endif // TPETRA_ENABLE_DEPRECATED_CODE
129 template<
class MatrixType>
130 Teuchos::RCP<
const Tpetra::Map<
typename MatrixType::local_ordinal_type,
131 typename MatrixType::global_ordinal_type,
132 typename MatrixType::node_type> >
135 return A_->getRowMap();
139 template<
class MatrixType>
140 Teuchos::RCP<
const Tpetra::Map<
typename MatrixType::local_ordinal_type,
141 typename MatrixType::global_ordinal_type,
142 typename MatrixType::node_type> >
145 return A_->getColMap();
149 template<
class MatrixType>
150 Teuchos::RCP<
const Tpetra::Map<
typename MatrixType::local_ordinal_type,
151 typename MatrixType::global_ordinal_type,
152 typename MatrixType::node_type> >
155 return A_->getDomainMap();
159 template<
class MatrixType>
160 Teuchos::RCP<
const Tpetra::Map<
typename MatrixType::local_ordinal_type,
161 typename MatrixType::global_ordinal_type,
162 typename MatrixType::node_type> >
165 return A_->getRangeMap();
169 template<
class MatrixType>
170 Teuchos::RCP<
const Tpetra::RowGraph<
typename MatrixType::local_ordinal_type,
171 typename MatrixType::global_ordinal_type,
172 typename MatrixType::node_type> >
175 throw std::runtime_error(
"Ifpack2::SparsityFilter: does not support getGraph.");
179 template<
class MatrixType>
186 template<
class MatrixType>
193 template<
class MatrixType>
201 template<
class MatrixType>
208 template<
class MatrixType>
211 return A_->getIndexBase();
215 template<
class MatrixType>
222 template<
class MatrixType>
229 template<
class MatrixType>
232 throw std::runtime_error(
"Ifpack2::SparsityFilter does not implement getNumEntriesInGlobalRow.");
236 template<
class MatrixType>
239 return NumEntries_[localRow];
243 template<
class MatrixType>
246 return MaxNumEntries_;
250 template<
class MatrixType>
253 return MaxNumEntries_;
257 template<
class MatrixType>
264 template<
class MatrixType>
267 return A_->isLocallyIndexed();
271 template<
class MatrixType>
274 return A_->isGloballyIndexed();
278 template<
class MatrixType>
281 return A_->isFillComplete();
285 template<
class MatrixType>
291 throw std::runtime_error(
"Ifpack2::SparsityFilter does not implement getGlobalRowCopy.");
295 template<
class MatrixType>
299 size_t &NumEntries)
const
301 TEUCHOS_TEST_FOR_EXCEPTION((LocalRow < 0 || (
size_t) LocalRow >= NumRows_ || (
size_t) Indices.
size() < NumEntries_[LocalRow]), std::runtime_error,
"Ifpack2::SparsityFilter::getLocalRowCopy invalid row or array size.");
309 size_t A_NumEntries=0;
310 A_->getLocalRowCopy(LocalRow,Indices_(),Values_(),A_NumEntries);
314 if (A_NumEntries > AllowedNumEntries_) {
316 for (
size_t i = 0 ; i < A_NumEntries ; ++i) {
318 if (Indices_[i] == LocalRow)
326 std::sort(Values2.rbegin(),Values2.rend());
328 Threshold = Values2[AllowedNumEntries_ - 1];
336 for (
size_t i = 0 ; i < A_NumEntries ; ++i) {
337 if (std::abs(Indices_[i] - LocalRow) > AllowedBandwidth_)
343 Values[NumEntries] = Values_[i];
344 Indices[NumEntries] = Indices_[i];
347 if (NumEntries > AllowedNumEntries_)
354 template<
class MatrixType>
359 throw std::runtime_error(
"Ifpack2::SparsityFilter: does not support getGlobalRowView.");
363 template<
class MatrixType>
368 throw std::runtime_error(
"Ifpack2::SparsityFilter: does not support getLocalRowView.");
372 template<
class MatrixType>
376 return A_->getLocalDiagCopy(diag);
380 template<
class MatrixType>
383 throw std::runtime_error(
"Ifpack2::SparsityFilter does not support leftScale.");
387 template<
class MatrixType>
390 throw std::runtime_error(
"Ifpack2::SparsityFilter does not support rightScale.");
394 template<
class MatrixType>
396 Tpetra::MultiVector<Scalar,LocalOrdinal,GlobalOrdinal,Node> &Y,
404 "Ifpack2::SparsityFilter::apply ERROR: X.getNumVectors() != Y.getNumVectors().");
411 size_t NumVectors = Y.getNumVectors();
413 for (
size_t i = 0 ; i < NumRows_ ; ++i) {
416 getLocalRowCopy(i,Indices_(),Values_(),Nnz);
418 for (
size_t j = 0 ; j < Nnz ; ++j)
419 for (
size_t k = 0 ; k < NumVectors ; ++k)
420 y_ptr[k][i] += Values_[j] * x_ptr[k][Indices_[j]];
423 for (
size_t j = 0 ; j < Nnz ; ++j)
424 for (
size_t k = 0 ; k < NumVectors ; ++k)
425 y_ptr[k][Indices_[j]] += Values_[j] * x_ptr[k][i];
428 for (
size_t j = 0 ; j < Nnz ; ++j)
429 for (
size_t k = 0 ; k < NumVectors ; ++k)
437 template<
class MatrixType>
444 template<
class MatrixType>
451 template<
class MatrixType>
454 throw std::runtime_error(
"Ifpack2::SparsityFilter does not implement getFrobeniusNorm.");
459 #define IFPACK2_SPARSITYFILTER_INSTANT(S,LO,GO,N) \
460 template class Ifpack2::SparsityFilter< Tpetra::RowMatrix<S, LO, GO, N> >;
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_SparsityFilter_def.hpp:395
virtual size_t getNumEntriesInLocalRow(LocalOrdinal localRow) const
Returns the current number of entries on this node in the specified local row.
Definition: Ifpack2_SparsityFilter_def.hpp:237
virtual bool hasTransposeApply() const
Indicates whether this operator supports applying the adjoint operator.
Definition: Ifpack2_SparsityFilter_def.hpp:438
virtual Teuchos::RCP< const Tpetra::Map< LocalOrdinal, GlobalOrdinal, Node > > getRowMap() const
Returns the Map that describes the row distribution in this matrix.
Definition: Ifpack2_SparsityFilter_def.hpp:133
virtual Teuchos::RCP< const Tpetra::Map< LocalOrdinal, GlobalOrdinal, Node > > getDomainMap() const
Returns the Map that describes the domain distribution in this matrix.
Definition: Ifpack2_SparsityFilter_def.hpp:153
virtual size_t getNodeNumCols() 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_SparsityFilter_def.hpp:202
#define TEUCHOS_TEST_FOR_EXCEPTION(throw_exception_test, Exception, msg)
virtual GlobalOrdinal getIndexBase() const
Returns the index base for global indices for this matrix.
Definition: Ifpack2_SparsityFilter_def.hpp:209
virtual void getGlobalRowCopy(GlobalOrdinal GlobalRow, const Teuchos::ArrayView< GlobalOrdinal > &Indices, const Teuchos::ArrayView< Scalar > &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_SparsityFilter_def.hpp:286
virtual Teuchos::RCP< const Tpetra::Map< LocalOrdinal, GlobalOrdinal, Node > > getColMap() const
Returns the Map that describes the column distribution in this matrix.
Definition: Ifpack2_SparsityFilter_def.hpp:143
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_SparsityFilter_def.hpp:373
virtual size_t getNodeMaxNumRowEntries() const
Returns the maximum number of entries across all rows/columns on this node.
Definition: Ifpack2_SparsityFilter_def.hpp:251
virtual bool isGloballyIndexed() const
If matrix indices are in the global range, this function returns true. Otherwise, this function retur...
Definition: Ifpack2_SparsityFilter_def.hpp:272
virtual Teuchos::RCP< const Tpetra::RowGraph< LocalOrdinal, GlobalOrdinal, Node > > getGraph() const
Returns the RowGraph associated with this matrix.
Definition: Ifpack2_SparsityFilter_def.hpp:173
virtual bool isLocallyIndexed() const
If matrix indices are in the local range, this function returns true. Otherwise, this function return...
Definition: Ifpack2_SparsityFilter_def.hpp:265
virtual ~SparsityFilter()
Destructor.
Definition: Ifpack2_SparsityFilter_def.hpp:109
virtual global_size_t getGlobalNumRows() const
Returns the number of global rows in this matrix.
Definition: Ifpack2_SparsityFilter_def.hpp:180
virtual size_t getNodeNumRows() const
Returns the number of rows owned on the calling node.
Definition: Ifpack2_SparsityFilter_def.hpp:194
virtual Teuchos::RCP< const Teuchos::Comm< int > > getComm() const
Returns the communicator.
Definition: Ifpack2_SparsityFilter_def.hpp:113
SparsityFilter(const Teuchos::RCP< const row_matrix_type > &Matrix, size_t AllowedNumEntries, LocalOrdinal AllowedBandwidth=-Teuchos::ScalarTraits< LocalOrdinal >::one())
Constructor.
Definition: Ifpack2_SparsityFilter_def.hpp:57
virtual size_t getNumEntriesInGlobalRow(GlobalOrdinal globalRow) const
Returns the current number of entries on this node in the specified global row.
Definition: Ifpack2_SparsityFilter_def.hpp:230
virtual global_size_t getGlobalNumCols() const
Returns the number of global columns in this matrix.
Definition: Ifpack2_SparsityFilter_def.hpp:187
virtual bool hasColMap() const
Indicates whether this matrix has a well-defined column map.
Definition: Ifpack2_SparsityFilter_def.hpp:258
virtual mag_type getFrobeniusNorm() const
Returns the Frobenius norm of the matrix.
Definition: Ifpack2_SparsityFilter_def.hpp:452
virtual size_t getNodeNumEntries() const
Returns the local number of entries in this matrix.
Definition: Ifpack2_SparsityFilter_def.hpp:223
Drop entries of a matrix, based on the sparsity pattern.
Definition: Ifpack2_SparsityFilter_decl.hpp:82
virtual size_t getGlobalMaxNumRowEntries() const
Returns the maximum number of entries across all rows/columns on all nodes.
Definition: Ifpack2_SparsityFilter_def.hpp:244
void resize(size_type new_size, const value_type &x=value_type())
virtual Teuchos::RCP< const Tpetra::Map< LocalOrdinal, GlobalOrdinal, Node > > getRangeMap() const
Returns the Map that describes the range distribution in this matrix.
Definition: Ifpack2_SparsityFilter_def.hpp:163
virtual global_size_t getGlobalNumEntries() const
Returns the global number of entries in this matrix.
Definition: Ifpack2_SparsityFilter_def.hpp:216
virtual bool isFillComplete() const
Returns true if fillComplete() has been called.
Definition: Ifpack2_SparsityFilter_def.hpp:279
static magnitudeType magnitude(T a)
virtual void getLocalRowView(LocalOrdinal DropRow, Teuchos::ArrayView< const LocalOrdinal > &indices, Teuchos::ArrayView< const Scalar > &values) const
Extract a const, non-persisting view of local indices in a specified row of the matrix.
Definition: Ifpack2_SparsityFilter_def.hpp:364
virtual void rightScale(const Tpetra::Vector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &x)
Scales the RowMatrix on the right with the Vector x.
Definition: Ifpack2_SparsityFilter_def.hpp:388
virtual void leftScale(const Tpetra::Vector< Scalar, LocalOrdinal, GlobalOrdinal, Node > &x)
Scales the RowMatrix on the left with the Vector x.
Definition: Ifpack2_SparsityFilter_def.hpp:381
virtual bool supportsRowViews() const
Returns true if RowViews are supported.
Definition: Ifpack2_SparsityFilter_def.hpp:445
virtual void getLocalRowCopy(LocalOrdinal DropRow, const Teuchos::ArrayView< LocalOrdinal > &Indices, const Teuchos::ArrayView< Scalar > &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_SparsityFilter_def.hpp:296
virtual void getGlobalRowView(GlobalOrdinal GlobalRow, Teuchos::ArrayView< const GlobalOrdinal > &indices, Teuchos::ArrayView< const Scalar > &values) const
Extract a const, non-persisting view of global indices in a specified row of the matrix.
Definition: Ifpack2_SparsityFilter_def.hpp:355