PETScWrappers::MPI::SparseMatrix::Traits Struct Reference

#include <deal.II/lac/petsc_parallel_sparse_matrix.h>

Static Public Attributes
static const bool	zero_addition_can_be_elided = false

Detailed Description

A structure that describes some of the traits of this class in terms of its run-time behavior. Some other classes (such as the block matrix classes) that take one or other of the matrix classes as its template parameters can tune their behavior based on the variables in this class.

Definition at line 134 of file petsc_parallel_sparse_matrix.h.

Member Data Documentation

zero_addition_can_be_elided

const bool PETScWrappers::MPI::SparseMatrix::Traits::zero_addition_can_be_elided = false

static

It is not safe to elide additions of zeros to individual elements of this matrix. The reason is that additions to the matrix may trigger collective operations synchronising buffers on multiple processes. If an addition is elided on one process, this may lead to other processes hanging in an infinite waiting loop.

Definition at line 143 of file petsc_parallel_sparse_matrix.h.

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

• deal.II/lac/petsc_parallel_sparse_matrix.h