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// ------------------------------------------------------------------------
//
// SPDX-License-Identifier: LGPL-2.1-or-later
// Copyright (C) 2000 - 2025 by the deal.II authors
//
// This file is part of the deal.II library.
//
// Part of the source code is dual licensed under Apache-2.0 WITH
// LLVM-exception OR LGPL-2.1-or-later. Detailed license information
// governing the source code and code contributions can be found in
// LICENSE.md and CONTRIBUTING.md at the top level directory of deal.II.
//
// ------------------------------------------------------------------------
#include <deal.II/lac/block_sparse_matrix.h>
#include <deal.II/lac/la_parallel_block_vector.h>
#include <deal.II/lac/la_parallel_vector.h>
#include <deal.II/lac/petsc_block_vector.h>
#include <deal.II/lac/petsc_vector.h>
#include <deal.II/lac/sparse_matrix.h>
#include <deal.II/lac/trilinos_parallel_block_vector.h>
#include <deal.II/lac/trilinos_vector.h>
#include <deal.II/lac/vector.h>
#include <deal.II/multigrid/mg_smoother.h>
#include <deal.II/multigrid/mg_transfer.h>
#include <deal.II/multigrid/mg_transfer_block.h>
#include <deal.II/multigrid/mg_transfer_block.templates.h>
#include <deal.II/multigrid/mg_transfer_component.h>
#include <deal.II/multigrid/mg_transfer_component.templates.h>
#include <deal.II/multigrid/multigrid.templates.h>
DEAL_II_NAMESPACE_OPEN
MGTransferBlockBase::MGTransferBlockBase()
: n_mg_blocks(0)
{}
MGTransferBlockBase::MGTransferBlockBase(const MGConstrainedDoFs &mg_c)
: n_mg_blocks(0)
, mg_constrained_dofs(&mg_c)
{}
template <typename number>
MGTransferBlock<number>::MGTransferBlock()
: memory(nullptr, typeid(*this).name())
{}
template <typename number>
MGTransferBlock<number>::~MGTransferBlock()
{
if (memory != nullptr)
memory = nullptr;
}
template <typename number>
void
MGTransferBlock<number>::initialize(const std::vector<number> &f,
VectorMemory<Vector<number>> &mem)
{
factors = f;
memory = &mem;
}
template <typename number>
void
MGTransferBlock<number>::prolongate(const unsigned int to_level,
BlockVector<number> &dst,
const BlockVector<number> &src) const
{
Assert((to_level >= 1) && (to_level <= prolongation_matrices.size()),
ExcIndexRange(to_level, 1, prolongation_matrices.size() + 1));
Assert(src.n_blocks() == this->n_mg_blocks,
ExcDimensionMismatch(src.n_blocks(), this->n_mg_blocks));
Assert(dst.n_blocks() == this->n_mg_blocks,
ExcDimensionMismatch(dst.n_blocks(), this->n_mg_blocks));
if constexpr (running_in_debug_mode())
{
if (this->mg_constrained_dofs != nullptr)
Assert(this->mg_constrained_dofs
->get_user_constraint_matrix(to_level - 1)
.get_local_lines()
.size() == 0,
ExcNotImplemented());
}
// Multiplicate with prolongation
// matrix, but only those blocks
// selected.
for (unsigned int b = 0; b < this->mg_block.size(); ++b)
{
if (this->selected[b])
prolongation_matrices[to_level - 1]->block(b, b).vmult(
dst.block(this->mg_block[b]), src.block(this->mg_block[b]));
}
}
template <typename number>
void
MGTransferBlock<number>::restrict_and_add(const unsigned int from_level,
BlockVector<number> &dst,
const BlockVector<number> &src) const
{
Assert((from_level >= 1) && (from_level <= prolongation_matrices.size()),
ExcIndexRange(from_level, 1, prolongation_matrices.size() + 1));
Assert(src.n_blocks() == this->n_mg_blocks,
ExcDimensionMismatch(src.n_blocks(), this->n_mg_blocks));
Assert(dst.n_blocks() == this->n_mg_blocks,
ExcDimensionMismatch(dst.n_blocks(), this->n_mg_blocks));
for (unsigned int b = 0; b < this->mg_block.size(); ++b)
{
if (this->selected[b])
{
if (factors.size() != 0)
{
Assert(memory != nullptr, ExcNotInitialized());
Vector<number> *aux = memory->alloc();
aux->reinit(dst.block(this->mg_block[b]));
prolongation_matrices[from_level - 1]->block(b, b).Tvmult(
*aux, src.block(this->mg_block[b]));
dst.block(this->mg_block[b]).add(factors[b], *aux);
memory->free(aux);
}
else
{
prolongation_matrices[from_level - 1]->block(b, b).Tvmult_add(
dst.block(this->mg_block[b]), src.block(this->mg_block[b]));
}
}
}
}
std::size_t
MGTransferComponentBase::memory_consumption() const
{
std::size_t result = sizeof(*this);
result += MemoryConsumption::memory_consumption(component_mask) -
sizeof(ComponentMask);
result += MemoryConsumption::memory_consumption(target_component) -
sizeof(mg_target_component);
result += MemoryConsumption::memory_consumption(sizes) - sizeof(sizes);
result += MemoryConsumption::memory_consumption(component_start) -
sizeof(component_start);
result += MemoryConsumption::memory_consumption(mg_component_start) -
sizeof(mg_component_start);
result += MemoryConsumption::memory_consumption(prolongation_sparsities) -
sizeof(prolongation_sparsities);
result += MemoryConsumption::memory_consumption(prolongation_matrices) -
sizeof(prolongation_matrices);
// TODO:[GK] Add this.
// result += MemoryConsumption::memory_consumption(copy_to_and_from_indices)
// - sizeof(copy_to_and_from_indices);
return result;
}
// TODO:[GK] Add all those little vectors.
std::size_t
MGTransferBlockBase::memory_consumption() const
{
std::size_t result = sizeof(*this);
result += sizeof(unsigned int) * sizes.size();
result += MemoryConsumption::memory_consumption(selected) - sizeof(selected);
result += MemoryConsumption::memory_consumption(mg_block) - sizeof(mg_block);
result +=
MemoryConsumption::memory_consumption(block_start) - sizeof(block_start);
result += MemoryConsumption::memory_consumption(mg_block_start) -
sizeof(mg_block_start);
result += MemoryConsumption::memory_consumption(prolongation_sparsities) -
sizeof(prolongation_sparsities);
result += MemoryConsumption::memory_consumption(prolongation_matrices) -
sizeof(prolongation_matrices);
// TODO:[GK] Add this.
// result += MemoryConsumption::memory_consumption(copy_indices)
// - sizeof(copy_indices);
return result;
}
//----------------------------------------------------------------------//
template <typename number>
MGTransferSelect<number>::MGTransferSelect()
: selected_component(0)
, mg_selected_component(0)
{}
template <typename number>
MGTransferSelect<number>::MGTransferSelect(const AffineConstraints<double> &c)
: selected_component(0)
, mg_selected_component(0)
, constraints(&c)
{}
template <typename number>
void
MGTransferSelect<number>::prolongate(const unsigned int to_level,
Vector<number> &dst,
const Vector<number> &src) const
{
Assert((to_level >= 1) && (to_level <= prolongation_matrices.size()),
ExcIndexRange(to_level, 1, prolongation_matrices.size() + 1));
prolongation_matrices[to_level - 1]
->block(mg_target_component[mg_selected_component],
mg_target_component[mg_selected_component])
.vmult(dst, src);
}
template <typename number>
void
MGTransferSelect<number>::restrict_and_add(const unsigned int from_level,
Vector<number> &dst,
const Vector<number> &src) const
{
Assert((from_level >= 1) && (from_level <= prolongation_matrices.size()),
ExcIndexRange(from_level, 1, prolongation_matrices.size() + 1));
prolongation_matrices[from_level - 1]
->block(mg_target_component[mg_selected_component],
mg_target_component[mg_selected_component])
.Tvmult_add(dst, src);
}
//----------------------------------------------------------------------//
template <typename number>
MGTransferBlockSelect<number>::MGTransferBlockSelect()
: selected_block(0)
{}
template <typename number>
MGTransferBlockSelect<number>::MGTransferBlockSelect(
const MGConstrainedDoFs &mg_c)
: MGTransferBlockBase(mg_c)
, selected_block(0)
{}
template <typename number>
void
MGTransferBlockSelect<number>::prolongate(const unsigned int to_level,
Vector<number> &dst,
const Vector<number> &src) const
{
Assert((to_level >= 1) && (to_level <= prolongation_matrices.size()),
ExcIndexRange(to_level, 1, prolongation_matrices.size() + 1));
if constexpr (running_in_debug_mode())
{
if (this->mg_constrained_dofs != nullptr)
Assert(this->mg_constrained_dofs
->get_user_constraint_matrix(to_level - 1)
.get_local_lines()
.size() == 0,
ExcNotImplemented());
}
prolongation_matrices[to_level - 1]
->block(selected_block, selected_block)
.vmult(dst, src);
}
template <typename number>
void
MGTransferBlockSelect<number>::restrict_and_add(const unsigned int from_level,
Vector<number> &dst,
const Vector<number> &src) const
{
Assert((from_level >= 1) && (from_level <= prolongation_matrices.size()),
ExcIndexRange(from_level, 1, prolongation_matrices.size() + 1));
prolongation_matrices[from_level - 1]
->block(selected_block, selected_block)
.Tvmult_add(dst, src);
}
// Explicit instantiations
#include "multigrid/multigrid.inst"
template class MGTransferBlock<float>;
template class MGTransferBlock<double>;
template class MGTransferSelect<float>;
template class MGTransferSelect<double>;
template class MGTransferBlockSelect<float>;
template class MGTransferBlockSelect<double>;
DEAL_II_NAMESPACE_CLOSE
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