Reference documentation for deal.II version GIT relicensing-822-gf1642d4ea5 2024-06-12 14:10:02+00:00
\(\newcommand{\dealvcentcolon}{\mathrel{\mathop{:}}}\) \(\newcommand{\dealcoloneq}{\dealvcentcolon\mathrel{\mkern-1.2mu}=}\) \(\newcommand{\jump}[1]{\left[\!\left[ #1 \right]\!\right]}\) \(\newcommand{\average}[1]{\left\{\!\left\{ #1 \right\}\!\right\}}\)
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Public Member Functions | Public Attributes | List of all members
Portable::MatrixFree< dim, Number >::AdditionalData Struct Reference

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

Public Member Functions

 AdditionalData (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

UpdateFlags mapping_update_flags
 
bool use_coloring
 
bool overlap_communication_computation
 

Detailed Description

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

Standardized data struct to pipe additional data to MatrixFree.

Definition at line 105 of file portable_matrix_free.h.

Constructor & Destructor Documentation

◆ AdditionalData()

template<int dim, typename Number = double>
Portable::MatrixFree< dim, Number >::AdditionalData::AdditionalData ( 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 110 of file portable_matrix_free.h.

Member Data Documentation

◆ mapping_update_flags

template<int dim, typename Number = double>
UpdateFlags Portable::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 140 of file portable_matrix_free.h.

◆ use_coloring

template<int dim, typename Number = double>
bool Portable::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 147 of file portable_matrix_free.h.

◆ overlap_communication_computation

template<int dim, typename Number = double>
bool Portable::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 153 of file portable_matrix_free.h.


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