SpaceDistribution< dim, T > Class Template Reference

Class that distribute sub-sub-domains across processors using an hilbert curve to divide the space. More...

Detailed Description

template<unsigned int dim, typename T>
class SpaceDistribution< dim, T >

Class that distribute sub-sub-domains across processors using an hilbert curve to divide the space.

Initialize a Cartesian graph and decompose

    SpaceDistribution<3, float> space_dist(v_cl);

    // Physical domain
    Box<3, float> box( { 0.0, 0.0, 0.0 }, { 10.0, 10.0, 10.0 });

    // Grid info
    grid_sm<3, void> info( { 17, 17, 17 });

    // Initialize Cart graph and decompose
    space_dist.createCartGraph(info,box);

    // first decomposition
    space_dist.decompose();

Definition at line 24 of file SpaceDistribution.hpp.

#include <SpaceDistribution.hpp>

Public Member Functions
	SpaceDistribution (Vcluster &v_cl)
	SpaceDistribution (const ParMetisDistribution< dim, T > &pm)
	SpaceDistribution (SpaceDistribution< dim, T > &&pm)
void	createCartGraph (grid_sm< dim, void > &grid, Box< dim, T > dom)
	Create the Cartesian graph. More...
Graph_CSR< nm_v, nm_e > &	getGraph ()
	Get the current graph (main) More...
void	decompose ()
	Create the decomposition. More...
void	refine ()
	Refine current decomposition. More...
float	getUnbalance ()
	Compute the unbalance of the processor compared to the optimal balance. More...
void	getSubSubDomainPosition (size_t id, T(&pos)[dim])
	function that return the position of the vertex in the space More...
void	setComputationCost (size_t id, size_t weight)
	Function that set the weight of the vertex. More...
bool	weightsAreUsed ()
	Checks if weights are used on the vertices. More...
size_t	getSubSubDomainComputationCost (size_t id)
	function that get the weight of the vertex More...
size_t	getProcessorLoad ()
	Compute the processor load counting the total weights of its vertices. More...
void	setMigrationCost (size_t id, size_t migration)
	Set migration cost of the vertex id. More...
void	setCommunicationCost (size_t v_id, size_t e, size_t communication)
	Set communication cost of the edge id. More...
size_t	getNSubSubDomains ()
	Returns total number of sub-sub-domains in the distribution graph. More...
size_t	getNSubSubDomainNeighbors (size_t id)
	Returns total number of neighbors of the sub-sub-domain id. More...
void	write (const std::string &file)
	Print the current distribution and save it to VTK file. More...
const SpaceDistribution< dim, T > &	operator= (const SpaceDistribution< dim, T > &dist)
const SpaceDistribution< dim, T > &	operator= (SpaceDistribution< dim, T > &&dist)
size_t	get_ndec ()
	It return the decomposition id. More...

Private Attributes
Vcluster &	v_cl
	Vcluster.
grid_sm< dim, void >	gr
	Structure that store the cartesian grid information.
Box< dim, T >	domain
	rectangular domain to decompose
Graph_CSR< nm_v, nm_e >	gp
	Global sub-sub-domain graph.

Constructor & Destructor Documentation

template<unsigned int dim, typename T>

SpaceDistribution< dim, T >::SpaceDistribution ( Vcluster &  v_cl )

inline

Constructor

Parameters

v_cl	Vcluster to use as communication object in this class

Definition at line 45 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

SpaceDistribution< dim, T >::SpaceDistribution ( const ParMetisDistribution< dim, T > &  pm )

inline

Copy constructor

Parameters

pm	Distribution to copy

Definition at line 55 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

SpaceDistribution< dim, T >::SpaceDistribution ( SpaceDistribution< dim, T > &&  pm )

inline

Copy constructor

Parameters

pm	Distribution to copy

Definition at line 66 of file SpaceDistribution.hpp.

Member Function Documentation

template<unsigned int dim, typename T>

void SpaceDistribution< dim, T >::createCartGraph ( grid_sm< dim, void > &  grid, Box< dim, T >  dom  )

inline

Create the Cartesian graph.

Parameters

grid	info
dom	domain

Definition at line 77 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

void SpaceDistribution< dim, T >::decompose ( )

inline

Create the decomposition.

Definition at line 114 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

size_t SpaceDistribution< dim, T >::get_ndec ( )

inline

It return the decomposition id.

It just return 0

Returns

0

Definition at line 390 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

Graph_CSR<nm_v, nm_e>& SpaceDistribution< dim, T >::getGraph ( )

inline

Get the current graph (main)

Definition at line 106 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

size_t SpaceDistribution< dim, T >::getNSubSubDomainNeighbors ( size_t  id )

inline

Returns total number of neighbors of the sub-sub-domain id.

Parameters

id	id of the sub-sub-domain

Definition at line 348 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

size_t SpaceDistribution< dim, T >::getNSubSubDomains ( )

inline

Returns total number of sub-sub-domains in the distribution graph.

Returns

number of sub-sub-domain

Definition at line 339 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

size_t SpaceDistribution< dim, T >::getProcessorLoad ( )

inline

Compute the processor load counting the total weights of its vertices.

Returns

the computational load of the processor graph

Definition at line 298 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

size_t SpaceDistribution< dim, T >::getSubSubDomainComputationCost ( size_t  id )

inline

function that get the weight of the vertex

Parameters

id

vertex id

Returns

the weight of the vertex

Definition at line 289 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

void SpaceDistribution< dim, T >::getSubSubDomainPosition ( size_t  id, T(&)  pos[dim]  )

inline

function that return the position of the vertex in the space

Parameters

id	vertex id
pos	vector that will contain x, y, z

Definition at line 248 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

float SpaceDistribution< dim, T >::getUnbalance ( )

inline

Compute the unbalance of the processor compared to the optimal balance.

Returns

the unbalance from the optimal one 0.01 mean 1%

Definition at line 237 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

void SpaceDistribution< dim, T >::refine ( )

inline

Refine current decomposition.

Has no effect in this case

Definition at line 228 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

void SpaceDistribution< dim, T >::setCommunicationCost ( size_t  v_id, size_t  e, size_t  communication  )

inline

Set communication cost of the edge id.

Parameters

v_id	Id of the source vertex of the edge
e	i child of the vertex
communication	Communication value

Definition at line 330 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

void SpaceDistribution< dim, T >::setComputationCost ( size_t  id, size_t  weight  )

inline

Function that set the weight of the vertex.

Parameters

id	vertex id
weight	to give to the vertex

Definition at line 268 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

void SpaceDistribution< dim, T >::setMigrationCost ( size_t  id, size_t  migration  )

inline

Set migration cost of the vertex id.

Parameters

id	of the vertex to update
migration	cost of the migration

Definition at line 320 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

bool SpaceDistribution< dim, T >::weightsAreUsed ( )

inline

Checks if weights are used on the vertices.

Returns

true if weights are used in the decomposition

Definition at line 277 of file SpaceDistribution.hpp.

template<unsigned int dim, typename T>

void SpaceDistribution< dim, T >::write ( const std::string &  file )

inline

Print the current distribution and save it to VTK file.

Parameters

file

filename

Definition at line 358 of file SpaceDistribution.hpp.

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

• src/Decomposition/Distribution/SpaceDistribution.hpp