MPIB::SGv Namespace Reference

Classes
class	Assembler
class	Indexer
class	Vertex_writer
class	Edge_writer
class	Binomial_builder
class	Sorted_binomial_builder
class	Traff_builder
Variables
int	tag = 0

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Detailed Description

Auxiliaries for scatterv/gatherv tree algorithms

Communication tree builders for scatterv/gatherv. Must implement a function:

void build(int size, int root, int rank, int* counts,
    Graph& g, Vertex& r, Vertex& u, Vertex& v);

Parameters:

	size	communicator size
	root	root process
	rank	current process
	counts	array of message sizes in bytes (counts * extent) (number of elements = communicator size)
	g	graph
	r	root vertex (introduced to avoid search)
	u	parent of v (introduced to avoid search)
	v	vertex for the current process (introduced to avoid search)

See also:

Test for the tree-based scatterv/gatherv

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Variable Documentation

int MPIB::SGv::tag = 0

tag for scatterv/gatherv - not safe, incremental on all processors