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/***************************************************************************
ILU0.h - description
-------------------
begin : Dec 24, 2016
copyright : (C) 2016 by Tomas Oberhuber et al.
email : tomas.oberhuber@fjfi.cvut.cz
***************************************************************************/
/* See Copyright Notice in tnl/Copyright */
// Implemented by: Jakub Klinkovsky
#include <TNL/Object.h>
#include <TNL/Containers/Vector.h>
#include <TNL/Matrices/CSR.h>
#if defined(HAVE_CUDA) && defined(HAVE_CUSPARSE)
namespace TNL {
namespace Solvers {
namespace Linear {
namespace Preconditioners {
template< typename Real, typename Device, typename Index >
class ILU0
{};
template< typename Real, typename Index >
class ILU0< Real, Devices::Host, Index >
{
public:
using RealType = Real;
using DeviceType = Devices::Host;
using IndexType = Index;
template< typename MatrixPointer >
void update( const MatrixPointer& matrixPointer );
template< typename Vector1, typename Vector2 >
bool solve( const Vector1& b, Vector2& x ) const;
String getType() const
{
return String( "ILU0" );
}
protected:
Matrices::CSR< RealType, DeviceType, IndexType > L;
Matrices::CSR< RealType, DeviceType, IndexType > U;
};
template<>
class ILU0< double, Devices::Cuda, int >
{
public:
using RealType = double;
using DeviceType = Devices::Cuda;
using IndexType = int;
ILU0()
{
#if defined(HAVE_CUDA) && defined(HAVE_CUSPARSE)
cusparseCreate( &handle );
#endif
}
template< typename MatrixPointer >
void update( const MatrixPointer& matrixPointer );
template< typename Vector1, typename Vector2 >
bool solve( const Vector1& b, Vector2& x ) const;
String getType() const
{
return String( "ILU0" );
}
~ILU0()
{
#if defined(HAVE_CUDA) && defined(HAVE_CUSPARSE)
resetMatrices();
cusparseDestroy( handle );
#endif
}
protected:
#if defined(HAVE_CUDA) && defined(HAVE_CUSPARSE)
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Matrices::CSR< RealType, DeviceType, IndexType > A;
Containers::Vector< RealType, DeviceType, IndexType > y;
cusparseHandle_t handle;
cusparseMatDescr_t descr_A = 0;
cusparseMatDescr_t descr_L = 0;
cusparseMatDescr_t descr_U = 0;
csrilu02Info_t info_A = 0;
csrsv2Info_t info_L = 0;
csrsv2Info_t info_U = 0;
const cusparseSolvePolicy_t policy_A = CUSPARSE_SOLVE_POLICY_USE_LEVEL;
const cusparseSolvePolicy_t policy_L = CUSPARSE_SOLVE_POLICY_USE_LEVEL;
const cusparseSolvePolicy_t policy_U = CUSPARSE_SOLVE_POLICY_USE_LEVEL;
const cusparseOperation_t trans_L = CUSPARSE_OPERATION_NON_TRANSPOSE;
const cusparseOperation_t trans_U = CUSPARSE_OPERATION_NON_TRANSPOSE;
Containers::Array< char, DeviceType, int > pBuffer;
// scaling factor for triangular solves
const double alpha = 1.0;
void resetMatrices()
{
if( descr_A ) {
cusparseDestroyMatDescr( descr_A );
descr_A = 0;
}
if( descr_L ) {
cusparseDestroyMatDescr( descr_L );
descr_L = 0;
}
if( descr_U ) {
cusparseDestroyMatDescr( descr_U );
descr_U = 0;
}
if( info_A ) {
cusparseDestroyCsrilu02Info( info_A );
info_A = 0;
}
if( info_L ) {
cusparseDestroyCsrsv2Info( info_L );
info_L = 0;
}
if( info_U ) {
cusparseDestroyCsrsv2Info( info_U );
info_U = 0;
}
pBuffer.reset();
}
// TODO: extend Matrices::copySparseMatrix accordingly
template< typename Matrix,
typename = typename std::enable_if< ! std::is_same< DeviceType, typename Matrix::DeviceType >::value >::type >
void copyMatrix( const Matrix& matrix )
{
typename Matrix::CudaType A_tmp;
A_tmp = matrix;
Matrices::copySparseMatrix( A, A_tmp );
}
template< typename Matrix,
typename = typename std::enable_if< std::is_same< DeviceType, typename Matrix::DeviceType >::value >::type,
typename = void >
void copyMatrix( const Matrix& matrix )
{
Matrices::copySparseMatrix( A, matrix );
}
#endif
};
#ifdef HAVE_MIC
template< typename Real, typename Index >
class ILU0< Real, Devices::MIC, Index >
{
public:
using RealType = Real;
using DeviceType = Devices::MIC;
using IndexType = Index;
template< typename MatrixPointer >
void update( const MatrixPointer& matrixPointer )
{
throw std::runtime_error("Not Iplemented yet for MIC");
}
template< typename Vector1, typename Vector2 >
bool solve( const Vector1& b, Vector2& x ) const
{
throw std::runtime_error("Not Iplemented yet for MIC");
}
String getType() const
{
return String( "ILU0" );
}
};
#endif
} // namespace Preconditioners
} // namespace Linear
} // namespace Solvers
} // namespace TNL
#include <TNL/Solvers/Linear/Preconditioners/ILU0_impl.h>