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Opm::Accelerator::rocsparseBILU0< Scalar, block_size > Class Template Reference

This class implements a Blocked ILU0 preconditioner The decomposition is done on GPU, using exact decomposition, or ChowPatel decomposition The preconditioner is applied via two exact triangular solves. More...

#include <rocsparseBILU0.hpp>

Inheritance diagram for Opm::Accelerator::rocsparseBILU0< Scalar, block_size >:
Opm::Accelerator::rocsparsePreconditioner< Scalar, block_size > Opm::Accelerator::Preconditioner< Scalar, block_size >

Public Member Functions

 rocsparseBILU0 (int verbosity_)
 
bool initialize (std::shared_ptr< BlockedMatrix< Scalar > > matrix, std::shared_ptr< BlockedMatrix< Scalar > > jacMatrix, rocsparse_int *d_Arows, rocsparse_int *d_Acols) override
 Initialize GPU and allocate memory.
 
bool analyze_matrix (BlockedMatrix< Scalar > *mat) override
 Analysis, extract parallelism if specified.
 
bool analyze_matrix (BlockedMatrix< Scalar > *mat, BlockedMatrix< Scalar > *jacMat) override
 Analysis, extract parallelism if specified.
 
bool create_preconditioner (BlockedMatrix< Scalar > *mat) override
 ILU decomposition.
 
bool create_preconditioner (BlockedMatrix< Scalar > *mat, BlockedMatrix< Scalar > *jacMat) override
 ILU decomposition.
 
void apply (Scalar &y, Scalar &x) override
 Apply preconditioner, x = prec(y) via Lz = y and Ux = z.
 
void copy_system_to_gpu (Scalar *mVals) override
 Copy matrix A values to GPU.
 
void update_system_on_gpu (Scalar *b) override
 Reassign pointers, in case the addresses of the Dune variables have changed --> TODO: check when/if we need this method.
 
- Public Member Functions inherited from Opm::Accelerator::rocsparsePreconditioner< Scalar, block_size >
void set_matrix_analysis (rocsparse_mat_descr descr_L, rocsparse_mat_descr descr_U)
 
void set_context (rocsparse_handle handle, rocsparse_direction dir, rocsparse_operation operation, hipStream_t stream)
 
void setJacMat (const BlockedMatrix< Scalar > &jacMat)
 

Additional Inherited Members

- Static Public Member Functions inherited from Opm::Accelerator::rocsparsePreconditioner< Scalar, block_size >
static std::unique_ptr< rocsparsePreconditioner< Scalar, block_size > > create (PreconditionerType type, int verbosity)
 
- Static Public Member Functions inherited from Opm::Accelerator::Preconditioner< Scalar, block_size >
static std::unique_ptr< Preconditionercreate (PreconditionerType type, bool opencl_ilu_parallel, int verbosity)
 
- Public Attributes inherited from Opm::Accelerator::rocsparsePreconditioner< Scalar, block_size >
int nnzbs_prec = 0
 
bool useJacMatrix = false
 
std::shared_ptr< BlockedMatrix< Scalar > > jacMat {}
 
- Protected Member Functions inherited from Opm::Accelerator::rocsparsePreconditioner< Scalar, block_size >
 rocsparsePreconditioner (int verbosity_)
 
- Protected Member Functions inherited from Opm::Accelerator::Preconditioner< Scalar, block_size >
 Preconditioner (int verbosity_)
 
- Protected Attributes inherited from Opm::Accelerator::rocsparsePreconditioner< Scalar, block_size >
rocsparse_handle handle
 
rocsparse_direction dir = rocsparse_direction_row
 
rocsparse_operation operation = rocsparse_operation_none
 
rocsparse_mat_descr descr_L
 
rocsparse_mat_descr descr_U
 
hipStream_t stream
 
- Protected Attributes inherited from Opm::Accelerator::Preconditioner< Scalar, block_size >
int N = 0
 
int Nb = 0
 
int nnz = 0
 
int nnzb = 0
 
int verbosity = 0
 

Detailed Description

template<class Scalar, unsigned int block_size>
class Opm::Accelerator::rocsparseBILU0< Scalar, block_size >

This class implements a Blocked ILU0 preconditioner The decomposition is done on GPU, using exact decomposition, or ChowPatel decomposition The preconditioner is applied via two exact triangular solves.

Member Function Documentation

◆ analyze_matrix() [1/2]

template<class Scalar , unsigned int block_size>
bool Opm::Accelerator::rocsparseBILU0< Scalar, block_size >::analyze_matrix ( BlockedMatrix< Scalar > *  mat)
overridevirtual

Analysis, extract parallelism if specified.

Parameters
[in]matmatrix A

Implements Opm::Accelerator::Preconditioner< Scalar, block_size >.

◆ analyze_matrix() [2/2]

template<class Scalar , unsigned int block_size>
bool Opm::Accelerator::rocsparseBILU0< Scalar, block_size >::analyze_matrix ( BlockedMatrix< Scalar > *  mat,
BlockedMatrix< Scalar > *  jacMat 
)
overridevirtual

Analysis, extract parallelism if specified.

Parameters
[in]matmatrix A
[in]jacMatmatrix for preconditioner, analyze this as well

Implements Opm::Accelerator::Preconditioner< Scalar, block_size >.

◆ apply()

template<class Scalar , unsigned int block_size>
void Opm::Accelerator::rocsparseBILU0< Scalar, block_size >::apply ( Scalar &  y,
Scalar &  x 
)
overridevirtual

Apply preconditioner, x = prec(y) via Lz = y and Ux = z.

Parameters
[in]yInput y vector
[out]xOutput x vector

Implements Opm::Accelerator::rocsparsePreconditioner< Scalar, block_size >.

◆ copy_system_to_gpu()

template<class Scalar , unsigned int block_size>
void Opm::Accelerator::rocsparseBILU0< Scalar, block_size >::copy_system_to_gpu ( Scalar *  mVals)
overridevirtual

Copy matrix A values to GPU.

Parameters
[in]mValsInput values

Implements Opm::Accelerator::rocsparsePreconditioner< Scalar, block_size >.

◆ create_preconditioner() [1/2]

template<class Scalar , unsigned int block_size>
bool Opm::Accelerator::rocsparseBILU0< Scalar, block_size >::create_preconditioner ( BlockedMatrix< Scalar > *  mat)
overridevirtual

ILU decomposition.

Parameters
[in]matmatrix A to decompose

Implements Opm::Accelerator::rocsparsePreconditioner< Scalar, block_size >.

◆ create_preconditioner() [2/2]

template<class Scalar , unsigned int block_size>
bool Opm::Accelerator::rocsparseBILU0< Scalar, block_size >::create_preconditioner ( BlockedMatrix< Scalar > *  mat,
BlockedMatrix< Scalar > *  jacMat 
)
overridevirtual

ILU decomposition.

Parameters
[in]matmatrix A
[in]jacMatmatrix for preconditioner, decompose this one if used

Implements Opm::Accelerator::rocsparsePreconditioner< Scalar, block_size >.

◆ initialize()

template<class Scalar , unsigned int block_size>
bool Opm::Accelerator::rocsparseBILU0< Scalar, block_size >::initialize ( std::shared_ptr< BlockedMatrix< Scalar > >  matrix,
std::shared_ptr< BlockedMatrix< Scalar > >  jacMatrix,
rocsparse_int d_Arows,
rocsparse_int d_Acols 
)
overridevirtual

Initialize GPU and allocate memory.

Parameters
[in]matrixmatrix A
[in]jacMatrixmatrix for preconditioner

Implements Opm::Accelerator::rocsparsePreconditioner< Scalar, block_size >.

◆ update_system_on_gpu()

template<class Scalar , unsigned int block_size>
void Opm::Accelerator::rocsparseBILU0< Scalar, block_size >::update_system_on_gpu ( Scalar *  b)
overridevirtual

Reassign pointers, in case the addresses of the Dune variables have changed --> TODO: check when/if we need this method.

Update GPU values after a new assembly is done

Parameters
[in]bNew b vector

Implements Opm::Accelerator::rocsparsePreconditioner< Scalar, block_size >.


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