Description

Sparse QR direct solver.

Interface to Eigen's SparseQR solver, a left-looking rank-revealing QR factorization.
Cannot handle VI and complementarity problems, so it cannot be used with NSC formulations.
See ChDirectSolverLS for more details.

#include <ChDirectSolverLS.h>

Inheritance diagram for chrono::ChSolverSparseQR:

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Collaboration diagram for chrono::ChSolverSparseQR:

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Public Member Functions
virtual Type	GetType () const override
	Return type of the solver.

Public Member Functions inherited from chrono::ChDirectSolverLS
void	LockSparsityPattern (bool val)
	Enable/disable locking the sparsity pattern (default: false). More...

void	UseSparsityPatternLearner (bool val)
	Enable/disable use of the sparsity pattern learner (default: enabled). More...

void	ForceSparsityPatternUpdate ()
	Force a call to the sparsity pattern learner to update sparsity pattern on the underlying matrix. More...

void	SetSparsityEstimate (double sparsity)
	Set estimate for matrix sparsity, a value in [0,1], with 0 indicating a fully dense matrix (default: 0.9). More...

virtual void	SetMatrixSymmetryType (MatrixSymmetryType symmetry)
	Set the matrix symmetry type (default: GENERAL).

void	UsePermutationVector (bool val)
	Enable/disable use of permutation vector (default: false). More...

void	LeverageRhsSparsity (bool val)
	Enable/disable leveraging sparsity in right-hand side vector (default: false). More...

virtual void	EnableNullPivotDetection (bool val, double threshold=0)
	Enable detection of null pivots. More...

void	ResetTimers ()
	Reset timers for internal phases in Solve and Setup.

double	GetTimeSolve_Assembly () const
	Get cumulative time for assembly operations in Solve phase.

double	GetTimeSolve_SolverCall () const
	Get cumulative time for Pardiso calls in Solve phase.

double	GetTimeSetup_Assembly () const
	Get cumulative time for assembly operations in Setup phase.

double	GetTimeSetup_SolverCall () const
	Get cumulative time for Pardiso calls in Setup phase.

unsigned int	GetNumSetupCalls () const
	Return the number of calls to the solver's Setup function.

unsigned int	GetNumSolveCalls () const
	Return the number of calls to the solver's Setup function.

ChSparseMatrix &	GetMatrix ()
	Get a handle to the underlying matrix.

ChSparseMatrix &	A ()
	Get shortcut handle to underlying A matrix, for A*x=b.

ChVectorDynamic< double > &	x ()
	Get shortcut handle to underlying x solution vector, for A*x=b.

ChVectorDynamic< double > &	b ()
	Get shortcut handle to underlying b right hand-side known vector, for A*x=b.

virtual bool	Setup (ChSystemDescriptor &sysd) override
	Perform the solver setup operations. More...

virtual double	Solve (ChSystemDescriptor &sysd) override
	Solve linear system. More...

virtual bool	SetupCurrent ()
	Generic setup-solve without passing through the ChSystemDescriptor, in cases where a sparse matrix has been already assembled. More...

virtual double	SolveCurrent ()
	Generic setup-solve without passing through the ChSystemDescriptor, in cases where the a sparse matrix has been already assembled. More...

virtual void	ArchiveOut (ChArchiveOut &archive_out) override
	Method to allow serialization of transient data to archives.

virtual void	ArchiveIn (ChArchiveIn &archive_in) override
	Method to allow de serialization of transient data from archives.

Public Member Functions inherited from chrono::ChSolver
virtual ChIterativeSolver *	AsIterative ()
	Downcast to ChIterativeSolver.

void	SetVerbose (bool mv)
	Set verbose output from solver.

void	EnableWrite (bool val, const std::string &frame, const std::string &out_dir=".")
	Enable/disable debug output of matrix, RHS, and solution vector.

Additional Inherited Members
Public Types inherited from chrono::ChDirectSolverLS
enum	MatrixSymmetryType { MatrixSymmetryType::GENERAL, MatrixSymmetryType::SYMMETRIC_POSDEF, MatrixSymmetryType::SYMMETRIC_INDEF, MatrixSymmetryType::STRUCTURAL_SYMMETRIC }

Public Types inherited from chrono::ChSolver
enum	Type { Type::PSOR, Type::PSSOR, Type::PJACOBI, Type::PMINRES, Type::BARZILAIBORWEIN, Type::APGD, Type::ADMM, Type::SPARSE_LU, Type::SPARSE_QR, Type::PARDISO_MKL, Type::MUMPS, Type::GMRES, Type::MINRES, Type::BICGSTAB, CUSTOM }
	Available types of solvers. More...

Static Public Member Functions inherited from chrono::ChSolver
static std::string	GetTypeAsString (Type type)
	Return the solver type as a string.

Protected Member Functions inherited from chrono::ChDirectSolverLS
virtual bool	IsIterative () const override
	Return true if iterative solver.

virtual bool	IsDirect () const override
	Return true if direct solver.

virtual ChDirectSolverLS *	AsDirect () override
	Downcast to ChDirectSolver.

virtual bool	SolveRequiresMatrix () const override
	Indicate whether or not the Solve() phase requires an up-to-date problem matrix. More...

Protected Attributes inherited from chrono::ChDirectSolverLS
ChSparseMatrix	m_mat
	problem matrix

int	m_dim
	problem size

MatrixSymmetryType	m_symmetry
	symmetry of problem matrix

double	m_sparsity
	user-supplied estimate of matrix sparsity

ChVectorDynamic< double >	m_rhs
	right-hand side vector

ChVectorDynamic< double >	m_sol
	solution vector

unsigned int	m_solve_call
	counter for calls to Solve

unsigned int	m_setup_call
	counter for calls to Setup

bool	m_lock
	is the matrix sparsity pattern locked?

bool	m_use_learner
	use the sparsity pattern learner?

bool	m_force_update
	force a call to the sparsity pattern learner?

bool	m_use_perm
	use of the permutation vector?

bool	m_use_rhs_sparsity
	leverage right-hand side sparsity?

bool	m_null_pivot_detection
	enable detection of zero pivots?

ChTimer	m_timer_setup_assembly
	timer for matrix assembly

ChTimer	m_timer_setup_solvercall
	timer for factorization

ChTimer	m_timer_solve_assembly
	timer for RHS assembly

ChTimer	m_timer_solve_solvercall
	timer for solution

Protected Attributes inherited from chrono::ChSolver
bool	verbose

bool	write_matrix

std::string	output_dir

std::string	frame_id

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

/builds/uwsbel/chrono/src/chrono/solver/ChDirectSolverLS.h
/builds/uwsbel/chrono/src/chrono/solver/ChDirectSolverLS.cpp

Description

Public Member Functions

Additional Inherited Members