This struct should contain all information necessary to perform operations on the local lattice including correct inter-core and inter-node communications. More information on GPU geometry with illustrations can be found in the developer guide in the section on GPU geometry. More...

#include <geometry_descriptor.h>

Data Fields
int	inner_master_pieces

int	local_master_pieces

int	total_spinor_master_pieces

int	total_gauge_master_pieces

int *	master_start

int *	master_end

int	master_shift

int	ncopies_spinor

int	ncopies_gauge

int *	copy_from

int *	copy_to

int *	copy_len

int	copy_shift

int	nbuffers_spinor

int	nbuffers_gauge

int *	rbuf_len

int *	sbuf_len

int *	rbuf_from_proc

int *	rbuf_start

int *	sbuf_to_proc

int *	sbuf_start

int	gsize_spinor

int	gsize_gauge

int *	fuse_mask

int	fuse_gauge_size

int	fuse_inner_counter

Detailed Description

This struct should contain all information necessary to perform operations on the local lattice including correct inter-core and inter-node communications. More information on GPU geometry with illustrations can be found in the developer guide in the section on GPU geometry.

Field Documentation

◆ gsize_spinor

int geometry_descriptor::gsize_spinor

Number of sites allocated for a spinor field

◆ inner_master_pieces

int geometry_descriptor::inner_master_pieces

Pieces that contain only bulk elements and can therefore need no communications

◆ local_master_pieces

int geometry_descriptor::local_master_pieces

Pieces that contain only sites of the local lattice.

◆ master_end

int * geometry_descriptor::master_end

Array that takes the piece number as index and returns the index of the last site in field data that is element of the piece with the given index. It is assumed that other elements on the piece are stored in preceding indices.

◆ master_shift

int geometry_descriptor::master_shift

This gives the shift of spinor relative to a full lattice. For example: A spinor with odd parity has a geometry that is deplaced by half the number of lattice sites relative to a spinor that is defined on the full lattice.

◆ master_start

int* geometry_descriptor::master_start

Array that takes the piece number as index and returns the index of the first site in the field data that is element of the piece with the given index. It is assumed that other elements on the piece are stored on the following indices.

◆ nbuffers_gauge

int geometry_descriptor::nbuffers_gauge

Number of buffers that need to be transferred for the gauge field.

◆ nbuffers_spinor

int geometry_descriptor::nbuffers_spinor

Number of buffers that need to be transferred for the spinor field.

◆ ncopies_gauge

int geometry_descriptor::ncopies_gauge

This gives the number of pieces that need to be copied from the local lattice to the local lattice in order to ensure contingency of piece data in memory for the gauge field.

◆ ncopies_spinor

int geometry_descriptor::ncopies_spinor

This gives the number of pieces that need to be copied from the local lattice to the local lattice in order to ensure contingency of piece data in memory for the spinor field.

◆ rbuf_from_proc

int* geometry_descriptor::rbuf_from_proc

Array that takes a buffer id and then return the process id of the target process.

◆ rbuf_len

int* geometry_descriptor::rbuf_len

Array that takes a buffer id and then returns the length of this buffer on the receive side.

◆ rbuf_start

int * geometry_descriptor::rbuf_start

Array that takes a buffer id and returns an index of the first site in memory that contains a site that is an element of the buffer piece.

◆ sbuf_len

int * geometry_descriptor::sbuf_len

Array that takes a buffer id and then returns the length of this buffer on the send site.

◆ sbuf_start

int * geometry_descriptor::sbuf_start

Array that takes a buffer id and returns an index of the first site in memory that contains a site that is an element of the send buffer piece.

◆ sbuf_to_proc

int* geometry_descriptor::sbuf_to_proc

Array that takes a buffer id and returns the process id of the process that sends the corresponding buffer.

◆ total_gauge_master_pieces

int geometry_descriptor::total_gauge_master_pieces

Total number of pieces necessary for communications of a gauge field. Since we need more buffers for the gauge fields this number is bigger than the number of spinor master pieces and the buffer pieces for the gauge fields are a superset of the buffer pieces for the spinor field.

◆ total_spinor_master_pieces

int geometry_descriptor::total_spinor_master_pieces

Total number of pieces for a spinor field. Since we need more buffers for the gauge fields, this number is smaller than the number of gauge master pieces and the buffer pieces are a subset of the buffer pieces for gauge field communications.

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

geometry_descriptor.h

Data Fields