A rank's share of a distributed mesh: owned cells, halo layers and the halo exchange plan. More...

#include <cstdint>
#include <vector>

Classes
struct	Distribution
	Local numbering: owned cells first (in global order), then halo layer 1, 2, ... Every local cell keeps its global id. More...

Functions
void	plan_halo_exchange (Distribution &dist, const std::vector< int > &halo_owner)
	Fill the exchange plan of dist, whose cells are numbered, from the owner of each of its halo cells (collective): each rank asks the owners for its halo cells, and the requests it receives become its send lists.

void	trim_halo_exchange (Distribution &dist, const std::vector< uint8_t > &needed)
	Keep in the exchange plan only the halo cells marked in needed (local cells); each neighbor stops sending the others. Collective.

Variables
constexpr const char *	PARTITION_ZONE = "__partition__"
	Boundary zone of local faces that border cells of other ranks.

Detailed Description

A rank's share of a distributed mesh: owned cells, halo layers and the halo exchange plan.

Author: Matthew Bonanni (mbona.nosp@m.nni0.nosp@m.01@gm.nosp@m.ail..nosp@m.com)

Version: 0.3

Date: 2026-10-02

Copyright: Copyright (c) 2026 Matthew Bonanni

Function Documentation

◆ plan_halo_exchange()

void plan_halo_exchange	(	Distribution &	dist,
		const std::vector< int > &	halo_owner
	)

Fill the exchange plan of dist, whose cells are numbered, from the owner of each of its halo cells (collective): each rank asks the owners for its halo cells, and the requests it receives become its send lists.

◆ trim_halo_exchange()

void trim_halo_exchange	(	Distribution &	dist,
		const std::vector< uint8_t > &	needed
	)

Keep in the exchange plan only the halo cells marked in needed (local cells); each neighbor stops sending the others. Collective.

Variable Documentation

◆ PARTITION_ZONE

constexpr const char* PARTITION_ZONE = "__partition__"

inlineconstexpr

Boundary zone of local faces that border cells of other ranks.

Classes