Utilities::MPI::ConsensusAlgorithms::Interface< T1, T2 > Class Template Reference

#include <deal.II/base/mpi_consensus_algorithms.h>

Inheritance diagram for Utilities::MPI::ConsensusAlgorithms::Interface< T1, T2 >:

Public Member Functions
	Interface (Process< T1, T2 > &process, const MPI_Comm &comm)
virtual	~Interface ()=default
virtual void	run ()=0

Protected Attributes
Process< T1, T2 > &	process
const MPI_Comm &	comm
const unsigned int	my_rank
const unsigned int	n_procs

Detailed Description

template<typename T1, typename T2>
class Utilities::MPI::ConsensusAlgorithms::Interface< T1, T2 >

A base class for algorithms that implement the task of coming up with communication patterns to retrieve data from other processes in a dynamic-sparse way. In computer science, this is often called a consensus problem.

Dynamic-sparse means in this context:

• By the time this function is called, the other processes do not know yet that they have to answer requests.
• Each process only has to communicate with a small subset of processes of the MPI communicator.

Naturally, the user has to provide:

• A communicator.
• For each rank a list of ranks of processes this process should communicate to.
• Functionality to pack/unpack data to be sent/received.

This base class only introduces a basic interface to achieve these goals, while derived classes implement different algorithms to actually compute such communication patterns. The last two features of the list above this paragraph are implemented in classes derived from ConsensusAlgorithm::Process.

Template Parameters

T1	The type of the elements of the vector to be sent.
T2	The type of the elements of the vector to be received.

Author

Peter Munch, 2019

Definition at line 170 of file mpi_consensus_algorithms.h.

Constructor & Destructor Documentation

Interface()

template<typename T1 , typename T2 >

Utilities::MPI::ConsensusAlgorithms::Interface< T1, T2 >::Interface	(	Process< T1, T2 > &	process,
		const MPI_Comm &	comm
	)

~Interface()

template<typename T1 , typename T2 >

virtual Utilities::MPI::ConsensusAlgorithms::Interface< T1, T2 >::~Interface ( )

virtualdefault

Destructor.

Member Function Documentation

run()

template<typename T1 , typename T2 >

virtual void Utilities::MPI::ConsensusAlgorithms::Interface< T1, T2 >::run ( )

pure virtual

Run consensus algorithm.

Implemented in Utilities::MPI::ConsensusAlgorithms::Selector< T1, T2 >, Utilities::MPI::ConsensusAlgorithms::PEX< T1, T2 >, and Utilities::MPI::ConsensusAlgorithms::NBX< T1, T2 >.

Member Data Documentation

process

template<typename T1 , typename T2 >

Process<T1, T2>& Utilities::MPI::ConsensusAlgorithms::Interface< T1, T2 >::process

protected

Reference to the process provided by the user.

Definition at line 190 of file mpi_consensus_algorithms.h.

comm

template<typename T1 , typename T2 >

const MPI_Comm& Utilities::MPI::ConsensusAlgorithms::Interface< T1, T2 >::comm

protected

MPI communicator.

Definition at line 195 of file mpi_consensus_algorithms.h.

my_rank

template<typename T1 , typename T2 >

const unsigned int Utilities::MPI::ConsensusAlgorithms::Interface< T1, T2 >::my_rank

protected

Rank of this process.

Definition at line 200 of file mpi_consensus_algorithms.h.

n_procs

template<typename T1 , typename T2 >

const unsigned int Utilities::MPI::ConsensusAlgorithms::Interface< T1, T2 >::n_procs

protected

Number of processes in the communicator.

Definition at line 205 of file mpi_consensus_algorithms.h.

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

• include/deal.II/base/mpi_consensus_algorithms.h