Reference documentation for deal.II version Git bbd65bc052 2020-05-28 13:59:52 -0500
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Public Member Functions | Public Attributes | List of all members
CUDAWrappers::MatrixFree< dim, Number >::AdditionalData Struct Reference

#include <deal.II/matrix_free/cuda_matrix_free.h>

Public Member Functions

 AdditionalData (const ParallelizationScheme parallelization_scheme=parallel_in_elem, const UpdateFlags mapping_update_flags=update_gradients|update_JxW_values|update_quadrature_points, const bool use_coloring=false, const bool overlap_communication_computation=false)
 

Public Attributes

ParallelizationScheme parallelization_scheme
 
UpdateFlags mapping_update_flags
 
bool use_coloring
 
bool overlap_communication_computation
 

Detailed Description

template<int dim, typename Number = double>
struct CUDAWrappers::MatrixFree< dim, Number >::AdditionalData

Standardized data struct to pipe additional data to MatrixFree.

Definition at line 100 of file cuda_matrix_free.h.

Constructor & Destructor Documentation

◆ AdditionalData()

template<int dim, typename Number = double>
CUDAWrappers::MatrixFree< dim, Number >::AdditionalData::AdditionalData ( const ParallelizationScheme  parallelization_scheme = parallel_in_elem,
const UpdateFlags  mapping_update_flags = update_gradients | update_JxW_values | update_quadrature_points,
const bool  use_coloring = false,
const bool  overlap_communication_computation = false 
)
inline

Constructor.

Definition at line 105 of file cuda_matrix_free.h.

Member Data Documentation

◆ parallelization_scheme

template<int dim, typename Number = double>
ParallelizationScheme CUDAWrappers::MatrixFree< dim, Number >::AdditionalData::parallelization_scheme

Parallelization scheme used, parallelization over degrees of freedom or over cells.

Definition at line 133 of file cuda_matrix_free.h.

◆ mapping_update_flags

template<int dim, typename Number = double>
UpdateFlags CUDAWrappers::MatrixFree< dim, Number >::AdditionalData::mapping_update_flags

This flag is used to determine which quantities should be cached. This class can cache data needed for gradient computations (inverse Jacobians), Jacobian determinants (JxW), quadrature points as well as data for Hessians (derivative of Jacobians). By default, only data for gradients and Jacobian determinants times quadrature weights, JxW, are cached. If quadrature points of second derivatives are needed, they must be specified by this field.

Definition at line 143 of file cuda_matrix_free.h.

◆ use_coloring

template<int dim, typename Number = double>
bool CUDAWrappers::MatrixFree< dim, Number >::AdditionalData::use_coloring

If true, use graph coloring. Otherwise, use atomic operations. Graph coloring ensures bitwise reproducibility but is slower on Pascal and newer architectures.

Definition at line 150 of file cuda_matrix_free.h.

◆ overlap_communication_computation

template<int dim, typename Number = double>
bool CUDAWrappers::MatrixFree< dim, Number >::AdditionalData::overlap_communication_computation

Overlap MPI communications with computation. This requires CUDA-aware MPI and use_coloring must be false.

Definition at line 156 of file cuda_matrix_free.h.


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