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viennacl::linalg::host_based::amg Namespace Reference

## Classes

struct | amg_id_influence
| Helper struct for sequential classical one-pass coarsening. More...

## Functions

template<typename NumericT >
void | amg_influence_trivial (compressed_matrix< NumericT > const &A, viennacl::linalg::detail::amg::amg_level_context &amg_context, viennacl::linalg::amg_tag &tag)
| Routine for taking all connections in the matrix as strong. More...
template<typename NumericT >
void | amg_influence_advanced (compressed_matrix< NumericT > const &A, viennacl::linalg::detail::amg::amg_level_context &amg_context, viennacl::linalg::amg_tag &tag)
| Routine for extracting strongly connected points considering a user-provided threshold value. More...
template<typename NumericT >
void | amg_influence (compressed_matrix< NumericT > const &A, viennacl::linalg::detail::amg::amg_level_context &amg_context, viennacl::linalg::amg_tag &tag)
| Dispatcher for influence processing. More...
void | enumerate_coarse_points (viennacl::linalg::detail::amg::amg_level_context &amg_context)
| Assign IDs to coarse points. More...
bool | operator> (amg_id_influence const &a, amg_id_influence const &b)
template<typename NumericT >
void | amg_coarse_classic_onepass (compressed_matrix< NumericT > const &A, viennacl::linalg::detail::amg::amg_level_context &amg_context, viennacl::linalg::amg_tag &tag)
| Classical (RS) one-pass coarsening. Single-Threaded! (VIENNACL_AMG_COARSE_CLASSIC_ONEPASS) More...
template<typename NumericT >
void | amg_coarse_ag_stage1_sequential (compressed_matrix< NumericT > const &A, viennacl::linalg::detail::amg::amg_level_context &amg_context, viennacl::linalg::amg_tag &tag)
| AG (aggregation based) coarsening, single-threaded version of stage 1. More...
template<typename NumericT >
void | amg_coarse_ag_stage1_mis2 (compressed_matrix< NumericT > const &A, viennacl::linalg::detail::amg::amg_level_context &amg_context, viennacl::linalg::amg_tag &tag)
| AG (aggregation based) coarsening, multi-threaded version of stage 1 using parallel maximum independent sets. More...
template<typename NumericT >
void | amg_coarse_ag (compressed_matrix< NumericT > const &A, viennacl::linalg::detail::amg::amg_level_context &amg_context, viennacl::linalg::amg_tag &tag)
| AG (aggregation based) coarsening. Partially single-threaded version (VIENNACL_AMG_COARSE_AG) More...
template<typename MatrixT >
void | amg_coarse (MatrixT &A, viennacl::linalg::detail::amg::amg_level_context &amg_context, viennacl::linalg::amg_tag &tag)
| Entry point and dispatcher for coarsening procedures. More...
template<typename NumericT >
void | amg_interpol_direct (compressed_matrix< NumericT > const &A, compressed_matrix< NumericT > &P, viennacl::linalg::detail::amg::amg_level_context &amg_context, viennacl::linalg::amg_tag &tag)
| Direct interpolation. Multi-threaded! (VIENNACL_AMG_INTERPOL_DIRECT) More...
template<typename NumericT >
void | amg_interpol_ag (compressed_matrix< NumericT > const &A, compressed_matrix< NumericT > &P, viennacl::linalg::detail::amg::amg_level_context &amg_context, viennacl::linalg::amg_tag &tag)
| AG (aggregation based) interpolation. Multi-Threaded! (VIENNACL_INTERPOL_AG) More...
template<typename NumericT >
void | amg_interpol_sa (compressed_matrix< NumericT > const &A, compressed_matrix< NumericT > &P, viennacl::linalg::detail::amg::amg_level_context &amg_context, viennacl::linalg::amg_tag &tag)
| Smoothed aggregation interpolation. Multi-Threaded! (VIENNACL_INTERPOL_SA) More...
template<typename MatrixT >
void | amg_interpol (MatrixT const &A, MatrixT &P, viennacl::linalg::detail::amg::amg_level_context &amg_context, viennacl::linalg::amg_tag &tag)
| Dispatcher for building the interpolation matrix. More...
template<typename NumericT >
void | amg_transpose (compressed_matrix< NumericT > const &A, compressed_matrix< NumericT > &B)
| Computes B = trans(A). More...
template<typename NumericT , unsigned int AlignmentV>
void | assign_to_dense (viennacl::compressed_matrix< NumericT, AlignmentV > const &A, viennacl::matrix_base< NumericT > &B)
template<typename NumericT >
void | smooth_jacobi (unsigned int iterations, compressed_matrix< NumericT > const &A, vector< NumericT > &x, vector< NumericT > &x_backup, vector< NumericT > const &rhs_smooth, NumericT weight)
| Damped Jacobi Smoother (CUDA version) More...

## Function Documentation

template<typename MatrixT >

void viennacl::linalg::host_based::amg::amg_coarse | ( | MatrixT & | A,
|  | viennacl::linalg::detail::amg::amg_level_context & | amg_context,
|  | viennacl::linalg::amg_tag & | tag
| ) |  |

Entry point and dispatcher for coarsening procedures.

Parameters

  A | Operator matrix for the respective level
  amg_context | AMG datastructure object for the grid hierarchy
  tag | AMG preconditioner tag

Definition at line 697 of file amg_operations.hpp.

template<typename NumericT >

void viennacl::linalg::host_based::amg::amg_coarse_ag | ( | compressed_matrix< NumericT > const & | A,
|  | viennacl::linalg::detail::amg::amg_level_context & | amg_context,
|  | viennacl::linalg::amg_tag & | tag
| ) |  |

AG (aggregation based) coarsening. Partially single-threaded version (VIENNACL_AMG_COARSE_AG)

Parameters

  A | Operator matrix for the respective level
  amg_context | AMG datastructure object for the grid hierarchy
  tag | AMG preconditioner tag

Definition at line 604 of file amg_operations.hpp.

template<typename NumericT >

void viennacl::linalg::host_based::amg::amg_coarse_ag_stage1_mis2 | ( | compressed_matrix< NumericT > const & | A,
|  | viennacl::linalg::detail::amg::amg_level_context & | amg_context,
|  | viennacl::linalg::amg_tag & | tag
| ) |  |

AG (aggregation based) coarsening, multi-threaded version of stage 1 using parallel maximum independent sets.

Parameters

  A | Operator matrix for the respective level
  amg_context | AMG datastructure object for the grid hierarchy
  tag | AMG preconditioner tag

Definition at line 418 of file amg_operations.hpp.

template<typename NumericT >

void viennacl::linalg::host_based::amg::amg_coarse_ag_stage1_sequential | ( | compressed_matrix< NumericT > const & | A,
|  | viennacl::linalg::detail::amg::amg_level_context & | amg_context,
|  | viennacl::linalg::amg_tag & | tag
| ) |  |

AG (aggregation based) coarsening, single-threaded version of stage 1.

Parameters

  A | Operator matrix for the respective level
  amg_context | AMG datastructure object for the grid hierarchy
  tag | AMG preconditioner tag

Definition at line 367 of file amg_operations.hpp.

template<typename NumericT >

void viennacl::linalg::host_based::amg::amg_coarse_classic_onepass | ( | compressed_matrix< NumericT > const & | A,
|  | viennacl::linalg::detail::amg::amg_level_context & | amg_context,
|  | viennacl::linalg::amg_tag & | tag
| ) |  |

Classical (RS) one-pass coarsening. Single-Threaded! (VIENNACL_AMG_COARSE_CLASSIC_ONEPASS)

Parameters

  A | Operator matrix for the respective level
  amg_context | AMG datastructure object for the grid hierarchy
  tag | AMG preconditioner tag

Definition at line 284 of file amg_operations.hpp.

template<typename NumericT >

void viennacl::linalg::host_based::amg::amg_influence | ( | compressed_matrix< NumericT > const & | A,
|  | viennacl::linalg::detail::amg::amg_level_context & | amg_context,
|  | viennacl::linalg::amg_tag & | tag
| ) |  |

Dispatcher for influence processing.

Definition at line 224 of file amg_operations.hpp.

template<typename NumericT >

void viennacl::linalg::host_based::amg::amg_influence_advanced | ( | compressed_matrix< NumericT > const & | A,
|  | viennacl::linalg::detail::amg::amg_level_context & | amg_context,
|  | viennacl::linalg::amg_tag & | tag
| ) |  |

Routine for extracting strongly connected points considering a user-provided threshold value.

Definition at line 84 of file amg_operations.hpp.

template<typename NumericT >

void viennacl::linalg::host_based::amg::amg_influence_trivial | ( | compressed_matrix< NumericT > const & | A,
|  | viennacl::linalg::detail::amg::amg_level_context & | amg_context,
|  | viennacl::linalg::amg_tag & | tag
| ) |  |

Routine for taking all connections in the matrix as strong.

Definition at line 50 of file amg_operations.hpp.

template<typename MatrixT >

void viennacl::linalg::host_based::amg::amg_interpol | ( | MatrixT const & | A,
|  | MatrixT & | P,
|  | viennacl::linalg::detail::amg::amg_level_context & | amg_context,
|  | viennacl::linalg::amg_tag & | tag
| ) |  |

Dispatcher for building the interpolation matrix.

Parameters

  A | Operator matrix
  P | Prolongation matrix
  amg_context | AMG hierarchy datastructures
  tag | AMG configuration tag

Definition at line 952 of file amg_operations.hpp.

template<typename NumericT >

void viennacl::linalg::host_based::amg::amg_interpol_ag | ( | compressed_matrix< NumericT > const & | A,
|  | compressed_matrix< NumericT > & | P,
|  | viennacl::linalg::detail::amg::amg_level_context & | amg_context,
|  | viennacl::linalg::amg_tag & | tag
| ) |  |

AG (aggregation based) interpolation. Multi-Threaded! (VIENNACL_INTERPOL_AG)

Parameters

  A | Operator matrix
  P | Prolongation matrix
  amg_context | AMG hierarchy datastructures
  tag | AMG configuration tag

Definition at line 841 of file amg_operations.hpp.

template<typename NumericT >

void viennacl::linalg::host_based::amg::amg_interpol_direct | ( | compressed_matrix< NumericT > const & | A,
|  | compressed_matrix< NumericT > & | P,
|  | viennacl::linalg::detail::amg::amg_level_context & | amg_context,
|  | viennacl::linalg::amg_tag & | tag
| ) |  |

Direct interpolation. Multi-threaded! (VIENNACL_AMG_INTERPOL_DIRECT)

Parameters

  A | Operator matrix
  P | Prolongation matrix
  amg_context | AMG hierarchy datastructures
  tag | AMG preconditioner tag

Definition at line 724 of file amg_operations.hpp.

template<typename NumericT >

void viennacl::linalg::host_based::amg::amg_interpol_sa | ( | compressed_matrix< NumericT > const & | A,
|  | compressed_matrix< NumericT > & | P,
|  | viennacl::linalg::detail::amg::amg_level_context & | amg_context,
|  | viennacl::linalg::amg_tag & | tag
| ) |  |

Smoothed aggregation interpolation. Multi-Threaded! (VIENNACL_INTERPOL_SA)

Parameters

  A | Operator matrix
  P | Prolongation matrix
  amg_context | AMG hierarchy datastructures
  tag | AMG configuration tag

Definition at line 880 of file amg_operations.hpp.

template<typename NumericT >

void viennacl::linalg::host_based::amg::amg_transpose | ( | compressed_matrix< NumericT > const & | A,
|  | compressed_matrix< NumericT > & | B
| ) |  |

Computes B = trans(A).

To be replaced by native functionality in ViennaCL.

Definition at line 972 of file amg_operations.hpp.

template<typename NumericT , unsigned int AlignmentV>

void viennacl::linalg::host_based::amg::assign_to_dense | ( | viennacl::compressed_matrix< NumericT, AlignmentV > const & | A,
|  | viennacl::matrix_base< NumericT > & | B
| ) |  |

Assign sparse matrix A to dense matrix B

Definition at line 1042 of file amg_operations.hpp.

void viennacl::linalg::host_based::amg::enumerate_coarse_points | ( | viennacl::linalg::detail::amg::amg_level_context & | amg_context | ) |

inline

Assign IDs to coarse points.

Definition at line 235 of file amg_operations.hpp.

bool viennacl::linalg::host_based::amg::operator> | ( | amg_id_influence const & | a,
|  | amg_id_influence const & | b
| ) |  |

inline

Definition at line 268 of file amg_operations.hpp.

template<typename NumericT >

void viennacl::linalg::host_based::amg::smooth_jacobi | ( | unsigned int | iterations,
|  | compressed_matrix< NumericT > const & | A,
|  | vector< NumericT > & | x,
|  | vector< NumericT > & | x_backup,
|  | vector< NumericT > const & | rhs_smooth,
|  | NumericT | weight
| ) |  |

Damped Jacobi Smoother (CUDA version)

Parameters

  iterations | Number of smoother iterations
  A | Operator matrix for the smoothing
  x | The vector smoothing is applied to
  x_backup | (Different) Vector holding the same values as x
  rhs_smooth | The right hand side of the equation for the smoother
  weight | Damping factor. 0: No effect of smoother. 1: Undamped Jacobi iteration

Definition at line 1074 of file amg_operations.hpp.