5#ifndef GKO_PUBLIC_CORE_PRECONDITIONER_ILU_HPP_
6#define GKO_PUBLIC_CORE_PRECONDITIONER_ILU_HPP_
12#include <ginkgo/core/base/abstract_factory.hpp>
13#include <ginkgo/core/base/composition.hpp>
14#include <ginkgo/core/base/exception.hpp>
15#include <ginkgo/core/base/exception_helpers.hpp>
16#include <ginkgo/core/base/lin_op.hpp>
17#include <ginkgo/core/base/precision_dispatch.hpp>
18#include <ginkgo/core/base/type_traits.hpp>
19#include <ginkgo/core/config/config.hpp>
20#include <ginkgo/core/config/registry.hpp>
21#include <ginkgo/core/factorization/par_ilu.hpp>
22#include <ginkgo/core/matrix/dense.hpp>
23#include <ginkgo/core/solver/solver_traits.hpp>
24#include <ginkgo/core/solver/triangular.hpp>
25#include <ginkgo/core/stop/combined.hpp>
26#include <ginkgo/core/stop/iteration.hpp>
27#include <ginkgo/core/stop/residual_norm.hpp>
35template <
typename Type>
36constexpr bool support_ilu_parse =
37 std::is_same_v<typename Type::l_solver_type, LinOp>&&
38 std::is_same_v<typename Type::u_solver_type, LinOp>;
41template <
typename Ilu, std::enable_if_t<!support_ilu_parse<Ilu>>* =
nullptr>
42typename Ilu::parameters_type ilu_parse(
43 const config::pnode& config,
const config::registry& context,
44 const config::type_descriptor& td_for_child)
47 "preconditioner::Ilu only supports limited type for parse.");
50template <
typename Ilu, std::enable_if_t<support_ilu_parse<Ilu>>* =
nullptr>
51typename Ilu::parameters_type ilu_parse(
52 const config::pnode& config,
const config::registry& context,
53 const config::type_descriptor& td_for_child);
110template <
typename LSolverTypeOrValueType = solver::LowerTrs<>,
111 typename USolverTypeOrValueType =
112 gko::detail::transposed_type<LSolverTypeOrValueType>,
113 bool ReverseApply = false,
typename IndexType =
int32>
115 :
public EnableLinOp<Ilu<LSolverTypeOrValueType, USolverTypeOrValueType,
116 ReverseApply, IndexType>>,
123 std::is_same_v<gko::detail::get_value_type<LSolverTypeOrValueType>,
124 gko::detail::get_value_type<USolverTypeOrValueType>>,
125 "Both the L- and the U-solver must use the same `value_type`!");
126 using value_type = gko::detail::get_value_type<LSolverTypeOrValueType>;
127 using l_solver_type =
128 std::conditional_t<gko::detail::is_ginkgo_linop<LSolverTypeOrValueType>,
129 LSolverTypeOrValueType,
LinOp>;
130 using u_solver_type =
131 std::conditional_t<gko::detail::is_ginkgo_linop<USolverTypeOrValueType>,
132 USolverTypeOrValueType,
LinOp>;
133 static constexpr bool performs_reverse_apply = ReverseApply;
134 using index_type = IndexType;
135 using transposed_type =
137 gko::detail::transposed_type<LSolverTypeOrValueType>, ReverseApply,
147 std::shared_ptr<const gko::detail::factory_type<l_solver_type>>
153 std::shared_ptr<const gko::detail::factory_type<u_solver_type>>
161 GKO_DEPRECATED(
"use with_l_solver instead")
164 const
gko::detail::factory_type<l_solver_type>>
177 const gko::detail::factory_type<l_solver_type>>
180 this->l_solver_generator = std::move(
solver);
181 this->deferred_factories[
"l_solver"] = [](
const auto& exec,
183 if (!params.l_solver_generator.is_empty()) {
184 params.l_solver_factory =
185 params.l_solver_generator.on(exec);
191 GKO_DEPRECATED(
"use with_u_solver instead")
194 const
gko::detail::factory_type<u_solver_type>>
207 const gko::detail::factory_type<u_solver_type>>
210 this->u_solver_generator = std::move(
solver);
211 this->deferred_factories[
"u_solver"] = [](
const auto& exec,
213 if (!params.u_solver_generator.is_empty()) {
214 params.u_solver_factory =
215 params.u_solver_generator.on(exec);
221 GKO_DEPRECATED(
"use with_factorization instead")
228 parameters_type& with_factorization(
232 this->deferred_factories[
"factorization"] = [](
const auto& exec,
234 if (!params.factorization_generator.is_empty()) {
235 params.factorization_factory =
236 params.factorization_generator.on(exec);
243 deferred_factory_parameter<
244 const gko::detail::factory_type<l_solver_type>>
247 deferred_factory_parameter<
248 const gko::detail::factory_type<u_solver_type>>
251 deferred_factory_parameter<const LinOpFactory> factorization_generator;
277 config::make_type_descriptor<value_type, index_type>())
280 return detail::ilu_parse<Ilu>(config, context, td_for_child);
305 std::unique_ptr<transposed_type> transposed{
306 new transposed_type{this->get_executor()}};
308 transposed->l_solver_ =
309 share(
as<gko::detail::transposed_type<u_solver_type>>(
311 transposed->u_solver_ =
312 share(
as<gko::detail::transposed_type<l_solver_type>>(
315 return std::move(transposed);
320 std::unique_ptr<transposed_type> transposed{
321 new transposed_type{this->get_executor()}};
323 transposed->l_solver_ =
324 share(
as<gko::detail::transposed_type<u_solver_type>>(
326 transposed->u_solver_ =
327 share(
as<gko::detail::transposed_type<l_solver_type>>(
330 return std::move(transposed);
340 if (&other !=
this) {
342 auto exec = this->get_executor();
343 l_solver_ = other.l_solver_;
344 u_solver_ = other.u_solver_;
345 parameters_ = other.parameters_;
346 if (other.get_executor() != exec) {
362 if (&other !=
this) {
364 auto exec = this->get_executor();
365 l_solver_ = std::move(other.l_solver_);
366 u_solver_ = std::move(other.u_solver_);
368 if (other.get_executor() != exec) {
380 Ilu(
const Ilu& other) :
Ilu{other.get_executor()} { *
this = other; }
387 Ilu(
Ilu&& other) :
Ilu{other.get_executor()} { *
this = std::move(other); }
390 void apply_impl(
const LinOp* b,
LinOp* x)
const override
394 [&](
auto dense_b,
auto dense_x) {
395 this->set_cache_to(dense_b);
397 l_solver_->apply(dense_b, cache_.intermediate);
398 if (u_solver_->apply_uses_initial_guess()) {
399 dense_x->copy_from(cache_.intermediate);
401 u_solver_->apply(cache_.intermediate, dense_x);
403 u_solver_->apply(dense_b, cache_.intermediate);
404 if (l_solver_->apply_uses_initial_guess()) {
405 dense_x->copy_from(cache_.intermediate);
407 l_solver_->apply(cache_.intermediate, dense_x);
413 void apply_impl(
const LinOp* alpha,
const LinOp* b,
const LinOp* beta,
414 LinOp* x)
const override
417 [&](
auto dense_alpha,
auto dense_b,
auto dense_beta,
auto dense_x) {
418 this->set_cache_to(dense_b);
420 l_solver_->apply(dense_b, cache_.intermediate);
421 u_solver_->apply(dense_alpha, cache_.intermediate,
422 dense_beta, dense_x);
424 u_solver_->apply(dense_b, cache_.intermediate);
425 l_solver_->apply(dense_alpha, cache_.intermediate,
426 dense_beta, dense_x);
432 explicit Ilu(std::shared_ptr<const Executor> exec)
433 : EnableLinOp<
Ilu>(std::move(exec))
436 explicit Ilu(
const Factory* factory, std::shared_ptr<const LinOp> lin_op)
437 : EnableLinOp<
Ilu>(
factory->get_executor(), lin_op->get_size()),
438 parameters_{
factory->get_parameters()}
441 std::dynamic_pointer_cast<const Composition<value_type>>(lin_op);
442 std::shared_ptr<const LinOp> l_factor;
443 std::shared_ptr<const LinOp> u_factor;
447 auto exec = lin_op->get_executor();
448 if (!parameters_.factorization_factory) {
449 parameters_.factorization_factory =
450 factorization::ParIlu<value_type, index_type>::build().on(
453 auto fact = std::shared_ptr<const LinOp>(
454 parameters_.factorization_factory->generate(lin_op));
458 if (comp->get_operators().size() == 2) {
459 l_factor = comp->get_operators()[0];
460 u_factor = comp->get_operators()[1];
462 GKO_NOT_SUPPORTED(comp);
464 GKO_ASSERT_EQUAL_DIMENSIONS(l_factor, u_factor);
466 auto exec = this->get_executor();
469 if (!parameters_.l_solver_factory) {
471 l_solver_ = generate_default_solver<std::conditional_t<
472 std::is_same_v<l_solver_type, LinOp>,
473 solver::LowerTrs<value_type, index_type>, l_solver_type>>(
476 l_solver_ = parameters_.l_solver_factory->generate(l_factor);
478 if (!parameters_.u_solver_factory) {
480 u_solver_ = generate_default_solver<std::conditional_t<
481 std::is_same_v<u_solver_type, LinOp>,
482 solver::UpperTrs<value_type, index_type>, u_solver_type>>(
485 u_solver_ = parameters_.u_solver_factory->generate(u_factor);
496 void set_cache_to(
const LinOp* b)
const
498 if (cache_.intermediate ==
nullptr) {
499 cache_.intermediate =
503 cache_.intermediate->copy_from(b);
514 template <
typename SolverType>
515 static std::enable_if_t<solver::has_with_criteria<SolverType>::value,
516 std::unique_ptr<SolverType>>
517 generate_default_solver(
const std::shared_ptr<const Executor>& exec,
518 const std::shared_ptr<const LinOp>& mtx)
522 const unsigned int default_max_iters{
523 static_cast<unsigned int>(mtx->get_size()[0])};
525 return SolverType::build()
527 gko::stop::Iteration::build().with_max_iters(default_max_iters),
528 gko::stop::ResidualNorm<value_type>::build()
529 .with_reduction_factor(default_reduce_residual))
537 template <
typename SolverType>
538 static std::enable_if_t<!solver::has_with_criteria<SolverType>::value,
539 std::unique_ptr<SolverType>>
540 generate_default_solver(
const std::shared_ptr<const Executor>& exec,
541 const std::shared_ptr<const LinOp>& mtx)
543 return SolverType::build().on(exec)->generate(mtx);
547 std::shared_ptr<const l_solver_type> l_solver_{};
548 std::shared_ptr<const u_solver_type> u_solver_{};
559 mutable struct cache_struct {
560 cache_struct() =
default;
561 ~cache_struct() =
default;
562 cache_struct(
const cache_struct&) {}
563 cache_struct(cache_struct&&) {}
564 cache_struct& operator=(
const cache_struct&) {
return *
this; }
565 cache_struct& operator=(cache_struct&&) {
return *
this; }
566 std::unique_ptr<LinOp> intermediate{};
The EnableLinOp mixin can be used to provide sensible default implementations of the majority of the ...
Definition lin_op.hpp:879
This mixin inherits from (a subclass of) PolymorphicObject and provides a base implementation of a ne...
Definition polymorphic_object.hpp:668
A LinOpFactory represents a higher order mapping which transforms one linear operator into another.
Definition lin_op.hpp:385
Definition lin_op.hpp:117
LinOp & operator=(const LinOp &)=default
Copy-assigns a LinOp.
Linear operators which support transposition should implement the Transposable interface.
Definition lin_op.hpp:433
pnode describes a tree of properties.
Definition property_tree.hpp:28
This class stores additional context for creating Ginkgo objects from configuration files.
Definition registry.hpp:167
This class describes the value and index types to be used when building a Ginkgo type from a configur...
Definition type_descriptor.hpp:39
Represents a factory parameter of factory type that can either initialized by a pre-existing factory ...
Definition abstract_factory.hpp:309
The enable_parameters_type mixin is used to create a base implementation of the factory parameters st...
Definition abstract_factory.hpp:211
static std::unique_ptr< Dense > create(std::shared_ptr< const Executor > exec, const dim< 2 > &size={}, size_type stride=0)
Creates an uninitialized Dense matrix of the specified size.
static parameters_type parse(const config::pnode &config, const config::registry &context, const config::type_descriptor &td_for_child=config::make_type_descriptor< value_type, index_type >())
Create the parameters from the property_tree.
Definition ilu.hpp:274
Ilu(const Ilu &other)
Copy-constructs an ILU preconditioner.
Definition ilu.hpp:380
Ilu(Ilu &&other)
Move-constructs an ILU preconditioner.
Definition ilu.hpp:387
std::shared_ptr< const u_solver_type > get_u_solver() const
Returns the solver which is used for the provided U matrix.
Definition ilu.hpp:298
std::unique_ptr< LinOp > transpose() const override
Returns a LinOp representing the transpose of the Transposable object.
Definition ilu.hpp:303
std::shared_ptr< const l_solver_type > get_l_solver() const
Returns the solver which is used for the provided L matrix.
Definition ilu.hpp:288
std::unique_ptr< LinOp > conj_transpose() const override
Returns a LinOp representing the conjugate transpose of the Transposable object.
Definition ilu.hpp:318
Ilu & operator=(Ilu &&other)
Move-assigns an ILU preconditioner.
Definition ilu.hpp:360
Ilu & operator=(const Ilu &other)
Copy-assigns an ILU preconditioner.
Definition ilu.hpp:338
#define GKO_ENABLE_BUILD_METHOD(_factory_name)
Defines a build method for the factory, simplifying its construction by removing the repetitive typin...
Definition abstract_factory.hpp:394
#define GKO_ENABLE_LIN_OP_FACTORY(_lin_op, _parameters_name, _factory_name)
This macro will generate a default implementation of a LinOpFactory for the LinOp subclass it is defi...
Definition lin_op.hpp:1017
The Factorization namespace.
Definition ic.hpp:26
@ factory
LinOpFactory events.
Definition profiler_hook.hpp:32
The Preconditioner namespace.
Definition gauss_seidel.hpp:19
The ginkgo Solve namespace.
Definition bicg.hpp:28
The Ginkgo namespace.
Definition abstract_factory.hpp:20
typename detail::remove_complex_s< T >::type remove_complex
Obtain the type which removed the complex of complex/scalar type or the template parameter of class b...
Definition math.hpp:264
void precision_dispatch_real_complex(Function fn, const LinOp *in, LinOp *out)
Calls the given function with the given LinOps temporarily converted to matrix::Dense<ValueType>* as ...
Definition precision_dispatch.hpp:97
detail::cloned_type< Pointer > clone(const Pointer &p)
Creates a unique clone of the object pointed to by p.
Definition utils_helper.hpp:173
batch_dim< 2, DimensionType > transpose(const batch_dim< 2, DimensionType > &input)
Returns a batch_dim object with its dimensions swapped for batched operators.
Definition batch_dim.hpp:119
std::decay_t< T > * as(U *obj)
Performs polymorphic type conversion.
Definition utils_helper.hpp:307
detail::shared_type< OwningPointer > share(OwningPointer &&p)
Marks the object pointed to by p as shared.
Definition utils_helper.hpp:224
parameters_type & with_l_solver(deferred_factory_parameter< const gko::detail::factory_type< l_solver_type > > solver)
When LSolverTypeOrValueType is a concrete solver type, this only accepts the factory from the same co...
Definition ilu.hpp:175
std::shared_ptr< const gko::detail::factory_type< l_solver_type > > l_solver_factory
Factory for the L solver.
Definition ilu.hpp:148
parameters_type & with_u_solver(deferred_factory_parameter< const gko::detail::factory_type< u_solver_type > > solver)
When USolverTypeOrValueType is a concrete solver type, this only accepts the factory from the same co...
Definition ilu.hpp:205
std::shared_ptr< const gko::detail::factory_type< u_solver_type > > u_solver_factory
Factory for the U solver.
Definition ilu.hpp:154
std::shared_ptr< const LinOpFactory > factorization_factory
Factory for the factorization.
Definition ilu.hpp:159