This class provides an interface to PETSc iterative solvers that is compatible with the libMesh NonlinearSolver<> More...

#include <petsc_nonlinear_solver.h>

Inheritance diagram for libMesh::PetscNonlinearSolver< T >:

[legend]

Classes
class	ComputeLineSearchObject
	Abstract base class to be used to implement a custom line-search algorithm. More...

Public Types
typedef NonlinearImplicitSystem	sys_type
	The type of system. More...

Public Member Functions
	PetscNonlinearSolver (sys_type &system)
	Constructor. More...

	~PetscNonlinearSolver ()
	Destructor. More...

virtual void	clear () override
	Release all memory and clear data structures. More...

virtual void	init (const char *name=nullptr) override
	Initialize data structures if not done so already. More...

SNES	snes ()

virtual std::pair< unsigned int, Real >	solve (SparseMatrix< T > &, NumericVector< T > &, NumericVector< T > &, const double, const unsigned int) override
	Call the Petsc solver. More...

virtual void	print_converged_reason () override
	Prints a useful message about why the latest nonlinear solve con(di)verged. More...

SNESConvergedReason	get_converged_reason ()

virtual int	get_total_linear_iterations () override
	Get the total number of linear iterations done in the last solve. More...

virtual unsigned	get_current_nonlinear_iteration_number () const override

void	set_residual_zero_out (bool state)
	Set if the residual should be zeroed out in the callback. More...

void	set_jacobian_zero_out (bool state)
	Set if the jacobian should be zeroed out in the callback. More...

void	use_default_monitor (bool state)
	Set to true to use the libMesh's default monitor, set to false to use your own. More...

void	set_snesmf_reuse_base (bool state)
	Set to true to let PETSc reuse the base vector. More...

bool	initialized () const

const sys_type &	system () const

sys_type &	system ()

void	attach_preconditioner (Preconditioner< T > *preconditioner)
	Attaches a Preconditioner object to be used during the linear solves. More...

void	set_solver_configuration (SolverConfiguration &solver_configuration)
	Set the solver configuration object. More...

const Parallel::Communicator &	comm () const

processor_id_type	n_processors () const

processor_id_type	processor_id () const

Static Public Member Functions
static std::unique_ptr< NonlinearSolver< T > >	build (sys_type &s, const SolverPackage solver_package=libMesh::default_solver_package())
	Builds a `NonlinearSolver` using the nonlinear solver package specified by `solver_package`. More...

static std::string	get_info ()
	Gets a string containing the reference information. More...

static void	print_info (std::ostream &out=libMesh::out)
	Prints the reference information, by default to `libMesh::out`. More...

static unsigned int	n_objects ()
	Prints the number of outstanding (created, but not yet destroyed) objects. More...

static void	enable_print_counter_info ()
	Methods to enable/disable the reference counter output from print_info() More...

static void	disable_print_counter_info ()

Public Attributes
std::unique_ptr< ComputeLineSearchObject >	linesearch_object
	A callable object that can be used to specify a custom line-search. More...

void(*	residual )(const NumericVector< Number > &X, NumericVector< Number > &R, sys_type &S)
	Function that computes the residual `R(X)` of the nonlinear system at the input iterate `X`. More...

NonlinearImplicitSystem::ComputeResidual *	residual_object
	Object that computes the residual `R(X)` of the nonlinear system at the input iterate `X`. More...

NonlinearImplicitSystem::ComputeResidual *	fd_residual_object
	Object that computes the residual `R(X)` of the nonlinear system at the input iterate `X` for the purpose of forming a finite-differenced Jacobian. More...

NonlinearImplicitSystem::ComputeResidual *	mffd_residual_object
	Object that computes the residual `R(X)` of the nonlinear system at the input iterate `X` for the purpose of forming Jacobian-vector products via finite differencing. More...

void(*	jacobian )(const NumericVector< Number > &X, SparseMatrix< Number > &J, sys_type &S)
	Function that computes the Jacobian `J(X)` of the nonlinear system at the input iterate `X`. More...

NonlinearImplicitSystem::ComputeJacobian *	jacobian_object
	Object that computes the Jacobian `J(X)` of the nonlinear system at the input iterate `X`. More...

void(*	matvec )(const NumericVector< Number > &X, NumericVector< Number > R, SparseMatrix< Number > J, sys_type &S)
	Function that computes either the residual or the Jacobian of the nonlinear system at the input iterate . More...

NonlinearImplicitSystem::ComputeResidualandJacobian *	residual_and_jacobian_object
	Object that computes either the residual or the Jacobian of the nonlinear system at the input iterate . More...

void(*	bounds )(NumericVector< Number > &XL, NumericVector< Number > &XU, sys_type &S)
	Function that computes the lower and upper bounds `XL` and `XU` on the solution of the nonlinear system. More...

NonlinearImplicitSystem::ComputeBounds *	bounds_object
	Object that computes the bounds vectors and . More...

void(*	nullspace )(std::vector< NumericVector< Number > *> &sp, sys_type &S)
	Function that computes a basis for the Jacobian's nullspace – the kernel or the "zero energy modes" – that can be used in solving a degenerate problem iteratively, if the solver supports it (e.g., PETSc's KSP). More...

NonlinearImplicitSystem::ComputeVectorSubspace *	nullspace_object
	A callable object that computes a basis for the Jacobian's nullspace – the kernel or the "zero energy modes" – that can be used in solving a degenerate problem iteratively, if the solver supports it (e.g., PETSc's KSP). More...

void(*	transpose_nullspace )(std::vector< NumericVector< Number > *> &sp, sys_type &S)
	Function that computes a basis for the transpose Jacobian's nullspace – when solving a degenerate problem iteratively, if the solver supports it (e.g., PETSc's KSP), it is used to remove contributions outside of R(jac) More...

NonlinearImplicitSystem::ComputeVectorSubspace *	transpose_nullspace_object
	A callable object that computes a basis for the transpose Jacobian's nullspace – when solving a degenerate problem iteratively, if the solver supports it (e.g., PETSc's KSP), it is used to remove contributions outside of R(jac) More...

void(*	nearnullspace )(std::vector< NumericVector< Number > *> &sp, sys_type &S)
	Function that computes a basis for the Jacobian's near nullspace – the set of "low energy modes" – that can be used for AMG coarsening, if the solver supports it (e.g., ML, PETSc's GAMG). More...

NonlinearImplicitSystem::ComputeVectorSubspace *	nearnullspace_object
	A callable object that computes a basis for the Jacobian's near nullspace – the set of "low energy modes" – that can be used for AMG coarsening, if the solver supports it (e.g., ML, PETSc's GAMG). More...

void(*	user_presolve )(sys_type &S)
	Customizable function pointer which users can attach to the solver. More...

void(*	postcheck )(const NumericVector< Number > &old_soln, NumericVector< Number > &search_direction, NumericVector< Number > &new_soln, bool &changed_search_direction, bool &changed_new_soln, sys_type &S)
	Function that performs a "check" on the Newton search direction and solution after each nonlinear step. More...

NonlinearImplicitSystem::ComputePostCheck *	postcheck_object
	A callable object that is executed after each nonlinear iteration. More...

unsigned int	max_nonlinear_iterations
	Maximum number of non-linear iterations. More...

unsigned int	max_function_evaluations
	Maximum number of function evaluations. More...

Real	absolute_residual_tolerance
	The NonlinearSolver should exit after the residual is reduced to either less than absolute_residual_tolerance or less than relative_residual_tolerance times the initial residual. More...

Real	relative_residual_tolerance

Real	absolute_step_tolerance
	The NonlinearSolver should exit after the full nonlinear step norm is reduced to either less than absolute_step_tolerance or less than relative_step_tolerance times the largest nonlinear solution which has been seen so far. More...

Real	relative_step_tolerance

unsigned int	max_linear_iterations
	Each linear solver step should exit after `max_linear_iterations` is exceeded. More...

Real	initial_linear_tolerance
	Any required linear solves will at first be done with this tolerance; the NonlinearSolver may tighten the tolerance for later solves. More...

Real	minimum_linear_tolerance
	The tolerance for linear solves is kept above this minimum. More...

bool	converged
	After a call to solve this will reflect whether or not the nonlinear solve was successful. More...

Protected Types
typedef std::map< std::string, std::pair< unsigned int, unsigned int > >	Counts
	Data structure to log the information. More...

Protected Member Functions
void	build_mat_null_space (NonlinearImplicitSystem::ComputeVectorSubspace computeSubspaceObject, void()(std::vector< NumericVector< Number > > &, sys_type &), MatNullSpace )

void	increment_constructor_count (const std::string &name)
	Increments the construction counter. More...

void	increment_destructor_count (const std::string &name)
	Increments the destruction counter. More...

Protected Attributes
SNES	_snes
	Nonlinear solver context. More...

SNESConvergedReason	_reason
	Store the reason for SNES convergence/divergence for use even after the _snes has been cleared. More...

PetscInt	_n_linear_iterations
	Stores the total number of linear iterations from the last solve. More...

unsigned	_current_nonlinear_iteration_number
	Stores the current nonlinear iteration number. More...

bool	_zero_out_residual
	true to zero out residual before going into application level call-back, otherwise false More...

bool	_zero_out_jacobian
	true to zero out jacobian before going into application level call-back, otherwise false More...

bool	_default_monitor
	true if we want the default monitor to be set, false for no monitor (i.e. More...

bool	_snesmf_reuse_base
	True, If we want the base vector to be used for differencing even if the function provided to SNESSetFunction() is not the same as that provided to MatMFFDSetFunction(). More...

sys_type &	_system
	A reference to the system we are solving. More...

bool	_is_initialized
	Flag indicating if the data structures have been initialized. More...

Preconditioner< T > *	_preconditioner
	Holds the Preconditioner object to be used for the linear solves. More...

SolverConfiguration *	_solver_configuration
	Optionally store a SolverOptions object that can be used to set parameters like solver type, tolerances and iteration limits. More...

const Parallel::Communicator &	_communicator

Static Protected Attributes
static Counts	_counts
	Actually holds the data. More...

static Threads::atomic< unsigned int >	_n_objects
	The number of objects. More...

static Threads::spin_mutex	_mutex
	Mutual exclusion object to enable thread-safe reference counting. More...

static bool	_enable_print_counter
	Flag to control whether reference count information is printed when print_info is called. More...

Friends
ResidualContext	libmesh_petsc_snes_residual_helper (SNES snes, Vec x, void *ctx)

PetscErrorCode	libmesh_petsc_snes_residual (SNES snes, Vec x, Vec r, void *ctx)

PetscErrorCode	libmesh_petsc_snes_fd_residual (SNES snes, Vec x, Vec r, void *ctx)

PetscErrorCode	libmesh_petsc_snes_mffd_residual (SNES snes, Vec x, Vec r, void *ctx)

PetscErrorCode	libmesh_petsc_snes_jacobian (SNES snes, Vec x, Mat jac, Mat pc, MatStructure msflag, void ctx)

PetscErrorCode	libmesh_petsc_snes_jacobian (SNES snes, Vec x, Mat jac, Mat pc, void *ctx)

Detailed Description

template<typename T>
class libMesh::PetscNonlinearSolver< T >

This class provides an interface to PETSc iterative solvers that is compatible with the libMesh NonlinearSolver<>

Author: Benjamin Kirk

Date: 2002-2007

Definition at line 93 of file petsc_nonlinear_solver.h.

Member Typedef Documentation

◆ Counts

typedef std::map<std::string, std::pair<unsigned int, unsigned int> > libMesh::ReferenceCounter::Counts

protectedinherited

Data structure to log the information.

The log is identified by the class name.

Definition at line 117 of file reference_counter.h.

◆ sys_type

template<typename T >

typedef NonlinearImplicitSystem libMesh::PetscNonlinearSolver< T >::sys_type

The type of system.

Definition at line 99 of file petsc_nonlinear_solver.h.

Constructor & Destructor Documentation

◆ PetscNonlinearSolver()

template<typename T >

libMesh::PetscNonlinearSolver< T >::PetscNonlinearSolver ( sys_type & system )

explicit

Constructor.

Initializes Petsc data structures

◆ ~PetscNonlinearSolver()

template<typename T >

libMesh::PetscNonlinearSolver< T >::~PetscNonlinearSolver ( )

Destructor.

Member Function Documentation

◆ attach_preconditioner()

template<typename T >

void libMesh::NonlinearSolver< T >::attach_preconditioner ( Preconditioner< T > * preconditioner )

inherited

Attaches a Preconditioner object to be used during the linear solves.

◆ build()

template<typename T >

static std::unique_ptr<NonlinearSolver<T> > libMesh::NonlinearSolver< T >::build	(	sys_type &	s,
		const SolverPackage	solver_package = `libMesh::default_solver_package()`
	)

staticinherited

Builds a NonlinearSolver using the nonlinear solver package specified by solver_package.

◆ build_mat_null_space()

template<typename T >

void libMesh::PetscNonlinearSolver< T >::build_mat_null_space	(	NonlinearImplicitSystem::ComputeVectorSubspace *	computeSubspaceObject,
		void()(std::vector< NumericVector< Number > > &, sys_type &)	,
		MatNullSpace *
	)

protected

◆ clear()

template<typename T >

virtual void libMesh::PetscNonlinearSolver< T >::clear ( )

overridevirtual

Release all memory and clear data structures.

Reimplemented from libMesh::NonlinearSolver< T >.

◆ comm()

const Parallel::Communicator& libMesh::ParallelObject::comm ( ) const

inherited

Returns: A reference to the Parallel::Communicator object used by this mesh.

Definition at line 89 of file parallel_object.h.

References libMesh::ParallelObject::_communicator.

Referenced by libMesh::EpetraVector< T >::EpetraVector(), libMesh::Parallel::sync_element_data_by_parent_id(), libMesh::Parallel::sync_node_data_by_element_id(), and libMesh::Parallel::sync_node_data_by_element_id_once().

90 { return _communicator; }

libMesh::ParallelObject::_communicator

const Parallel::Communicator & _communicator

Definition: parallel_object.h:107

◆ disable_print_counter_info()

static void libMesh::ReferenceCounter::disable_print_counter_info ( )

staticinherited

◆ enable_print_counter_info()

static void libMesh::ReferenceCounter::enable_print_counter_info ( )

staticinherited

Methods to enable/disable the reference counter output from print_info()

◆ get_converged_reason()

template<typename T >

SNESConvergedReason libMesh::PetscNonlinearSolver< T >::get_converged_reason ( )

Returns: The currently-available (or most recently obtained, if the SNES object has been destroyed) convergence reason.

Refer to PETSc docs for the meaning of different SNESConvergedReasons.

◆ get_current_nonlinear_iteration_number()

template<typename T >

virtual unsigned libMesh::PetscNonlinearSolver< T >::get_current_nonlinear_iteration_number ( ) const

overridevirtual

Returns: The current nonlinear iteration number if called during the solve(), for example by the user-specified residual or Jacobian function.

Implements libMesh::NonlinearSolver< T >.

Definition at line 164 of file petsc_nonlinear_solver.h.

References libMesh::PetscNonlinearSolver< T >::_current_nonlinear_iteration_number.

165 { return _current_nonlinear_iteration_number; }

libMesh::PetscNonlinearSolver::_current_nonlinear_iteration_number

unsigned _current_nonlinear_iteration_number

Stores the current nonlinear iteration number.

Definition: petsc_nonlinear_solver.h:230

◆ get_info()

static std::string libMesh::ReferenceCounter::get_info ( )

staticinherited

Gets a string containing the reference information.

◆ get_total_linear_iterations()

template<typename T >

virtual int libMesh::PetscNonlinearSolver< T >::get_total_linear_iterations ( )

overridevirtual

Get the total number of linear iterations done in the last solve.

Implements libMesh::NonlinearSolver< T >.

◆ increment_constructor_count()

void libMesh::ReferenceCounter::increment_constructor_count ( const std::string & name )

protectedinherited

Increments the construction counter.

Should be called in the constructor of any derived class that will be reference counted.

Definition at line 181 of file reference_counter.h.

References libMesh::ReferenceCounter::_counts, libMesh::Quality::name(), and libMesh::Threads::spin_mtx.

Referenced by libMesh::ReferenceCountedObject< RBParametrized >::ReferenceCountedObject().

 {
   Threads::spin_mutex::scoped_lock lock(Threads::spin_mtx);
   std::pair<unsigned int, unsigned int> & p = _counts[name];
 
   p.first++;
 }

◆ increment_destructor_count()

void libMesh::ReferenceCounter::increment_destructor_count ( const std::string & name )

protectedinherited

Increments the destruction counter.

Should be called in the destructor of any derived class that will be reference counted.

Definition at line 194 of file reference_counter.h.

References libMesh::ReferenceCounter::_counts, libMesh::Quality::name(), and libMesh::Threads::spin_mtx.

Referenced by libMesh::ReferenceCountedObject< RBParametrized >::~ReferenceCountedObject().

 {
   Threads::spin_mutex::scoped_lock lock(Threads::spin_mtx);
   std::pair<unsigned int, unsigned int> & p = _counts[name];
 
   p.second++;
 }

◆ init()

template<typename T >

virtual void libMesh::PetscNonlinearSolver< T >::init ( const char * name = nullptr )

overridevirtual

Initialize data structures if not done so already.

May assign a name to the solver in some implementations

Implements libMesh::NonlinearSolver< T >.

Referenced by libMesh::PetscNonlinearSolver< T >::snes().

◆ initialized()

template<typename T >

bool libMesh::NonlinearSolver< T >::initialized ( ) const

inherited

Returns: true if the data structures are initialized, false otherwise.

Definition at line 92 of file nonlinear_solver.h.

References libMesh::NonlinearSolver< T >::_is_initialized.

92 { return _is_initialized; }

libMesh::NonlinearSolver::_is_initialized

bool _is_initialized

Flag indicating if the data structures have been initialized.

Definition: nonlinear_solver.h:366

◆ n_objects()

static unsigned int libMesh::ReferenceCounter::n_objects ( )

staticinherited

Prints the number of outstanding (created, but not yet destroyed) objects.

Definition at line 83 of file reference_counter.h.

References libMesh::ReferenceCounter::_n_objects.

84 { return _n_objects; }

libMesh::ReferenceCounter::_n_objects

static Threads::atomic< unsigned int > _n_objects

The number of objects.

Definition: reference_counter.h:130

◆ n_processors()

processor_id_type libMesh::ParallelObject::n_processors ( ) const

inherited

Returns: The number of processors in the group.

Definition at line 95 of file parallel_object.h.

References libMesh::ParallelObject::_communicator, and libMesh::Parallel::Communicator::size().

Referenced by libMesh::MeshBase::partition().

96 { return cast_int<processor_id_type>(_communicator.size()); }

libMesh::Parallel::Communicator::size

processor_id_type size() const

Definition: communicator.h:175

libMesh::ParallelObject::_communicator

const Parallel::Communicator & _communicator

Definition: parallel_object.h:107

◆ print_converged_reason()

template<typename T >

virtual void libMesh::PetscNonlinearSolver< T >::print_converged_reason ( )

overridevirtual

Prints a useful message about why the latest nonlinear solve con(di)verged.

Reimplemented from libMesh::NonlinearSolver< T >.

◆ print_info()

static void libMesh::ReferenceCounter::print_info ( std::ostream & out = libMesh::out )

staticinherited

Prints the reference information, by default to libMesh::out.

◆ processor_id()

processor_id_type libMesh::ParallelObject::processor_id ( ) const

inherited

Returns: The rank of this processor in the group.

Definition at line 101 of file parallel_object.h.

References libMesh::ParallelObject::_communicator, and libMesh::Parallel::Communicator::rank().

Referenced by libMesh::DofMap::end_dof(), libMesh::DofMap::end_old_dof(), libMesh::DofMap::first_dof(), libMesh::DofMap::first_old_dof(), libMesh::DofMap::last_dof(), libMesh::MeshBase::n_active_local_elem(), libMesh::DofMap::n_local_dofs(), libMesh::MeshBase::n_local_elem(), libMesh::MeshBase::n_local_nodes(), and libMesh::MeshTools::weight().

102 { return cast_int<processor_id_type>(_communicator.rank()); }

libMesh::ParallelObject::_communicator

const Parallel::Communicator & _communicator

Definition: parallel_object.h:107

libMesh::Parallel::Communicator::rank

processor_id_type rank() const

Definition: communicator.h:173

◆ set_jacobian_zero_out()

template<typename T >

void libMesh::PetscNonlinearSolver< T >::set_jacobian_zero_out ( bool state )

Set if the jacobian should be zeroed out in the callback.

Definition at line 175 of file petsc_nonlinear_solver.h.

References libMesh::PetscNonlinearSolver< T >::_zero_out_jacobian.

175 { _zero_out_jacobian = state; }

libMesh::PetscNonlinearSolver::_zero_out_jacobian

bool _zero_out_jacobian

true to zero out jacobian before going into application level call-back, otherwise false ...

Definition: petsc_nonlinear_solver.h:240

◆ set_residual_zero_out()

template<typename T >

void libMesh::PetscNonlinearSolver< T >::set_residual_zero_out ( bool state )

Set if the residual should be zeroed out in the callback.

Definition at line 170 of file petsc_nonlinear_solver.h.

References libMesh::PetscNonlinearSolver< T >::_zero_out_residual.

170 { _zero_out_residual = state; }

libMesh::PetscNonlinearSolver::_zero_out_residual

bool _zero_out_residual

true to zero out residual before going into application level call-back, otherwise false ...

Definition: petsc_nonlinear_solver.h:235

◆ set_snesmf_reuse_base()

template<typename T >

void libMesh::PetscNonlinearSolver< T >::set_snesmf_reuse_base ( bool state )

Set to true to let PETSc reuse the base vector.

Definition at line 185 of file petsc_nonlinear_solver.h.

References libMesh::PetscNonlinearSolver< T >::_snesmf_reuse_base.

185 { _snesmf_reuse_base = state; }

libMesh::PetscNonlinearSolver::_snesmf_reuse_base

bool _snesmf_reuse_base

True, If we want the base vector to be used for differencing even if the function provided to SNESSet...

Definition: petsc_nonlinear_solver.h:252

◆ set_solver_configuration()

template<typename T >

void libMesh::NonlinearSolver< T >::set_solver_configuration ( SolverConfiguration & solver_configuration )

inherited

Set the solver configuration object.

◆ snes()

template<typename T >

SNES libMesh::PetscNonlinearSolver< T >::snes ( )

Returns: The raw PETSc snes context pointer.

Definition at line 126 of file petsc_nonlinear_solver.h.

References libMesh::PetscNonlinearSolver< T >::_snes, and libMesh::PetscNonlinearSolver< T >::init().

126 { this->init(); return _snes; }

libMesh::PetscNonlinearSolver::_snes

SNES _snes

Nonlinear solver context.

Definition: petsc_nonlinear_solver.h:208

libMesh::PetscNonlinearSolver::init

virtual void init(const char *name=nullptr) override

Initialize data structures if not done so already.

◆ solve()

template<typename T >

virtual std::pair<unsigned int, Real> libMesh::PetscNonlinearSolver< T >::solve	(	SparseMatrix< T > &	,
		NumericVector< T > &	,
		NumericVector< T > &	,
		const double	,
		const unsigned	int
	)

overridevirtual

Call the Petsc solver.

It calls the method below, using the same matrix for the system and preconditioner matrices.

Implements libMesh::NonlinearSolver< T >.

◆ system() [1/2]

template<typename T >

const sys_type& libMesh::NonlinearSolver< T >::system ( ) const

inherited

Returns: A constant reference to the system we are solving.

Definition at line 280 of file nonlinear_solver.h.

References libMesh::NonlinearSolver< T >::_system.

280 { return _system; }

libMesh::NonlinearSolver::_system

sys_type & _system

A reference to the system we are solving.

Definition: nonlinear_solver.h:361

◆ system() [2/2]

template<typename T >

sys_type& libMesh::NonlinearSolver< T >::system ( )

inherited

Returns: A writable reference to the system we are solving.

Definition at line 285 of file nonlinear_solver.h.

References libMesh::NonlinearSolver< T >::_system.

285 { return _system; }

libMesh::NonlinearSolver::_system

sys_type & _system

A reference to the system we are solving.

Definition: nonlinear_solver.h:361

◆ use_default_monitor()

template<typename T >

void libMesh::PetscNonlinearSolver< T >::use_default_monitor ( bool state )

Set to true to use the libMesh's default monitor, set to false to use your own.

Definition at line 180 of file petsc_nonlinear_solver.h.

References libMesh::PetscNonlinearSolver< T >::_default_monitor.

180 { _default_monitor = state; }

libMesh::PetscNonlinearSolver::_default_monitor

bool _default_monitor

true if we want the default monitor to be set, false for no monitor (i.e.

Definition: petsc_nonlinear_solver.h:245

Friends And Related Function Documentation

◆ libmesh_petsc_snes_fd_residual

template<typename T >

PetscErrorCode libmesh_petsc_snes_fd_residual	(	SNES	snes,
		Vec	x,
		Vec	r,
		void *	ctx
	)

friend

◆ libmesh_petsc_snes_jacobian [1/2]

template<typename T >

PetscErrorCode libmesh_petsc_snes_jacobian	(	SNES	snes,
		Vec	x,
		Mat *	jac,
		Mat *	pc,
		MatStructure *	msflag,
		void *	ctx
	)

friend

◆ libmesh_petsc_snes_jacobian [2/2]

template<typename T >

PetscErrorCode libmesh_petsc_snes_jacobian	(	SNES	snes,
		Vec	x,
		Mat	jac,
		Mat	pc,
		void *	ctx
	)

friend

◆ libmesh_petsc_snes_mffd_residual

template<typename T >

PetscErrorCode libmesh_petsc_snes_mffd_residual	(	SNES	snes,
		Vec	x,
		Vec	r,
		void *	ctx
	)

friend

◆ libmesh_petsc_snes_residual

template<typename T >

PetscErrorCode libmesh_petsc_snes_residual	(	SNES	snes,
		Vec	x,
		Vec	r,
		void *	ctx
	)

friend

◆ libmesh_petsc_snes_residual_helper

template<typename T >

ResidualContext libmesh_petsc_snes_residual_helper	(	SNES	snes,
		Vec	x,
		void *	ctx
	)

friend

Member Data Documentation

◆ _communicator

const Parallel::Communicator& libMesh::ParallelObject::_communicator

protectedinherited

Definition at line 107 of file parallel_object.h.

Referenced by libMesh::ParallelObject::comm(), libMesh::ParallelObject::n_processors(), libMesh::ParallelObject::operator=(), and libMesh::ParallelObject::processor_id().

◆ _counts

Counts libMesh::ReferenceCounter::_counts

staticprotectedinherited

Actually holds the data.

Definition at line 122 of file reference_counter.h.

Referenced by libMesh::ReferenceCounter::increment_constructor_count(), and libMesh::ReferenceCounter::increment_destructor_count().

◆ _current_nonlinear_iteration_number

template<typename T >

unsigned libMesh::PetscNonlinearSolver< T >::_current_nonlinear_iteration_number

protected

Stores the current nonlinear iteration number.

Definition at line 230 of file petsc_nonlinear_solver.h.

Referenced by libMesh::PetscNonlinearSolver< T >::get_current_nonlinear_iteration_number().

◆ _default_monitor

template<typename T >

bool libMesh::PetscNonlinearSolver< T >::_default_monitor

protected

true if we want the default monitor to be set, false for no monitor (i.e.

user code can use their own)

Definition at line 245 of file petsc_nonlinear_solver.h.

Referenced by libMesh::PetscNonlinearSolver< T >::use_default_monitor().

◆ _enable_print_counter

bool libMesh::ReferenceCounter::_enable_print_counter

staticprotectedinherited

Flag to control whether reference count information is printed when print_info is called.

Definition at line 141 of file reference_counter.h.

◆ _is_initialized

template<typename T >

bool libMesh::NonlinearSolver< T >::_is_initialized

protectedinherited

Flag indicating if the data structures have been initialized.

Definition at line 366 of file nonlinear_solver.h.

Referenced by libMesh::NonlinearSolver< T >::initialized().

◆ _mutex

Threads::spin_mutex libMesh::ReferenceCounter::_mutex

staticprotectedinherited

Mutual exclusion object to enable thread-safe reference counting.

Definition at line 135 of file reference_counter.h.

◆ _n_linear_iterations

template<typename T >

PetscInt libMesh::PetscNonlinearSolver< T >::_n_linear_iterations

protected

Stores the total number of linear iterations from the last solve.

Definition at line 225 of file petsc_nonlinear_solver.h.

◆ _n_objects

Threads::atomic<unsigned int> libMesh::ReferenceCounter::_n_objects

staticprotectedinherited

The number of objects.

Print the reference count information when the number returns to 0.

Definition at line 130 of file reference_counter.h.

Referenced by libMesh::ReferenceCounter::n_objects(), libMesh::ReferenceCounter::ReferenceCounter(), and libMesh::ReferenceCounter::~ReferenceCounter().

◆ _preconditioner

template<typename T >

Preconditioner<T>* libMesh::NonlinearSolver< T >::_preconditioner

protectedinherited

Holds the Preconditioner object to be used for the linear solves.

Definition at line 371 of file nonlinear_solver.h.

◆ _reason

template<typename T >

SNESConvergedReason libMesh::PetscNonlinearSolver< T >::_reason

protected

Store the reason for SNES convergence/divergence for use even after the _snes has been cleared.

Note: print_converged_reason() will always try to get the current reason with SNESGetConvergedReason(), but if the SNES object has already been cleared, it will fall back on this stored value. This value is therefore necessarily not cleared by the clear() function.

Definition at line 220 of file petsc_nonlinear_solver.h.

◆ _snes

template<typename T >

SNES libMesh::PetscNonlinearSolver< T >::_snes

protected

Nonlinear solver context.

Definition at line 208 of file petsc_nonlinear_solver.h.

Referenced by libMesh::PetscNonlinearSolver< T >::snes().

◆ _snesmf_reuse_base

template<typename T >

bool libMesh::PetscNonlinearSolver< T >::_snesmf_reuse_base

protected

True, If we want the base vector to be used for differencing even if the function provided to SNESSetFunction() is not the same as that provided to MatMFFDSetFunction().

https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/SNES/MatSNESMFSetReuseBase.html

Definition at line 252 of file petsc_nonlinear_solver.h.

Referenced by libMesh::PetscNonlinearSolver< T >::set_snesmf_reuse_base().

template<typename T >

Real libMesh::NonlinearSolver< T >::absolute_step_tolerance

inherited

The NonlinearSolver should exit after the full nonlinear step norm is reduced to either less than absolute_step_tolerance or less than relative_step_tolerance times the largest nonlinear solution which has been seen so far.

Users should increase any of these tolerances that they want to use for a stopping condition.

Note: Not all NonlinearSolvers support relative_step_tolerance!

◆ matvec

template<typename T >

void(* libMesh::NonlinearSolver< T >::matvec) (const NumericVector< Number > &X, NumericVector< Number > *R, SparseMatrix< Number > *J, sys_type &S)

inherited

Function that computes either the residual $ R(X) $ or the Jacobian $ J(X) $ of the nonlinear system at the input iterate $ X $ .

Note: Either R or J could be nullptr.

See documentation for the NonlinearImplicitSystem::ComputePostCheck object for more information about the calling sequence.

Definition at line 263 of file nonlinear_solver.h.

◆ postcheck_object

template<typename T >

NonlinearImplicitSystem::ComputePostCheck* libMesh::NonlinearSolver< T >::postcheck_object

inherited

A callable object that is executed after each nonlinear iteration.

Allows the user to modify both the search direction and the solution vector in an application-specific way.

Definition at line 275 of file nonlinear_solver.h.

◆ relative_residual_tolerance

template<typename T >

Real libMesh::NonlinearSolver< T >::relative_residual_tolerance

inherited

Definition at line 313 of file nonlinear_solver.h.

◆ relative_step_tolerance

template<typename T >

Real libMesh::NonlinearSolver< T >::relative_step_tolerance

inherited

Definition at line 327 of file nonlinear_solver.h.

◆ residual

template<typename T >

void(* libMesh::NonlinearSolver< T >::residual) (const NumericVector< Number > &X, NumericVector< Number > &R, sys_type &S)

inherited

Function that computes the residual R(X) of the nonlinear system at the input iterate X.

Definition at line 138 of file nonlinear_solver.h.

◆ residual_and_jacobian_object

template<typename T >

NonlinearImplicitSystem::ComputeResidualandJacobian* libMesh::NonlinearSolver< T >::residual_and_jacobian_object

inherited

Object that computes either the residual $ R(X) $ or the Jacobian $ J(X) $ of the nonlinear system at the input iterate $ X $ .

Note: Either R or J could be nullptr.

Definition at line 194 of file nonlinear_solver.h.

◆ residual_object

template<typename T >

NonlinearImplicitSystem::ComputeResidual* libMesh::NonlinearSolver< T >::residual_object

inherited

Object that computes the residual R(X) of the nonlinear system at the input iterate X.

Definition at line 146 of file nonlinear_solver.h.

◆ transpose_nullspace

template<typename T >

void(* libMesh::NonlinearSolver< T >::transpose_nullspace) (std::vector< NumericVector< Number > * > &sp, sys_type &S)

inherited

Function that computes a basis for the transpose Jacobian's nullspace – when solving a degenerate problem iteratively, if the solver supports it (e.g., PETSc's KSP), it is used to remove contributions outside of R(jac)

Definition at line 228 of file nonlinear_solver.h.

◆ transpose_nullspace_object

template<typename T >

NonlinearImplicitSystem::ComputeVectorSubspace* libMesh::NonlinearSolver< T >::transpose_nullspace_object

inherited

A callable object that computes a basis for the transpose Jacobian's nullspace – when solving a degenerate problem iteratively, if the solver supports it (e.g., PETSc's KSP), it is used to remove contributions outside of R(jac)

Definition at line 235 of file nonlinear_solver.h.

◆ user_presolve

template<typename T >

void(* libMesh::NonlinearSolver< T >::user_presolve) (sys_type &S)

inherited

Customizable function pointer which users can attach to the solver.

Gets called prior to every call to solve().

Definition at line 255 of file nonlinear_solver.h.

The documentation for this class was generated from the following file:

include/solvers/petsc_nonlinear_solver.h

Classes

Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Protected Types

Protected Member Functions

Protected Attributes

Static Protected Attributes

Friends

Detailed Description

template<typename T> class libMesh::PetscNonlinearSolver< T >

Member Typedef Documentation

◆ Counts

◆ sys_type

Constructor & Destructor Documentation

◆ PetscNonlinearSolver()

◆ ~PetscNonlinearSolver()

Member Function Documentation

◆ attach_preconditioner()

◆ build()

◆ build_mat_null_space()

◆ clear()

◆ comm()

◆ disable_print_counter_info()

◆ enable_print_counter_info()

◆ get_converged_reason()

◆ get_current_nonlinear_iteration_number()

◆ get_info()

◆ get_total_linear_iterations()

◆ increment_constructor_count()

◆ increment_destructor_count()

◆ init()

◆ initialized()

◆ n_objects()

◆ n_processors()

◆ print_converged_reason()

◆ print_info()

◆ processor_id()

◆ set_jacobian_zero_out()

◆ set_residual_zero_out()

◆ set_snesmf_reuse_base()

◆ set_solver_configuration()

◆ snes()

◆ solve()

◆ system() [1/2]

◆ system() [2/2]

◆ use_default_monitor()

Friends And Related Function Documentation

◆ libmesh_petsc_snes_fd_residual

◆ libmesh_petsc_snes_jacobian [1/2]

◆ libmesh_petsc_snes_jacobian [2/2]

◆ libmesh_petsc_snes_mffd_residual

◆ libmesh_petsc_snes_residual

◆ libmesh_petsc_snes_residual_helper

Member Data Documentation

◆ _communicator

◆ _counts

◆ _current_nonlinear_iteration_number

◆ _default_monitor

◆ _enable_print_counter

◆ _is_initialized

◆ _mutex

◆ _n_linear_iterations

◆ _n_objects

◆ _preconditioner

◆ _reason

◆ _snes

◆ _snesmf_reuse_base

◆ _solver_configuration

◆ _system

◆ _zero_out_jacobian

◆ _zero_out_residual

◆ absolute_residual_tolerance

◆ absolute_step_tolerance

◆ bounds

◆ bounds_object

◆ converged

◆ fd_residual_object

◆ initial_linear_tolerance

template<typename T>
class libMesh::PetscNonlinearSolver< T >