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.TH "hwlocality_distances_add" 3 "Thu Feb 11 2021" "Version 2.4.1" "Hardware Locality (hwloc)" \" -*- nroff -*-
.ad l
.nh
.SH NAME
hwlocality_distances_add \- Add or remove distances between objects
.SH SYNOPSIS
.br
.PP
.SS "Enumerations"
.in +1c
.ti -1c
.RI "enum \fBhwloc_distances_add_flag_e\fP { \fBHWLOC_DISTANCES_ADD_FLAG_GROUP\fP, \fBHWLOC_DISTANCES_ADD_FLAG_GROUP_INACCURATE\fP }"
.br
.in -1c
.SS "Functions"
.in +1c
.ti -1c
.RI "int \fBhwloc_distances_add\fP (\fBhwloc_topology_t\fP topology, unsigned nbobjs, \fBhwloc_obj_t\fP *objs, hwloc_uint64_t *values, unsigned long kind, unsigned long flags)"
.br
.ti -1c
.RI "int \fBhwloc_distances_remove\fP (\fBhwloc_topology_t\fP topology)"
.br
.ti -1c
.RI "int \fBhwloc_distances_remove_by_depth\fP (\fBhwloc_topology_t\fP topology, int depth)"
.br
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.RI "static int \fBhwloc_distances_remove_by_type\fP (\fBhwloc_topology_t\fP topology, \fBhwloc_obj_type_t\fP type)"
.br
.ti -1c
.RI "int \fBhwloc_distances_release_remove\fP (\fBhwloc_topology_t\fP topology, struct \fBhwloc_distances_s\fP *distances)"
.br
.in -1c
.SH "Detailed Description"
.PP
.SH "Enumeration Type Documentation"
.PP
.SS "enum \fBhwloc_distances_add_flag_e\fP"
.PP
Flags for adding a new distances to a topology\&.
.PP
\fBEnumerator\fP
.in +1c
.TP
\fB\fIHWLOC_DISTANCES_ADD_FLAG_GROUP \fP\fP
Try to group objects based on the newly provided distance information\&.
.TP
\fB\fIHWLOC_DISTANCES_ADD_FLAG_GROUP_INACCURATE \fP\fP
If grouping, consider the distance values as inaccurate and relax the comparisons during the grouping algorithms\&. The actual accuracy may be modified through the HWLOC_GROUPING_ACCURACY environment variable (see \fBEnvironment Variables\fP)\&.
.SH "Function Documentation"
.PP
.SS "int hwloc_distances_add (\fBhwloc_topology_t\fP topology, unsigned nbobjs, \fBhwloc_obj_t\fP * objs, hwloc_uint64_t * values, unsigned long kind, unsigned long flags)"
.PP
Provide a new distance matrix\&. Provide the matrix of distances between a set of objects given by \fCnbobjs\fP and the \fCobjs\fP array\&. \fCnbobjs\fP must be at least 2\&. The distances are stored as a one-dimension array in \fCvalues\fP\&. The distance from object i to object j is in slot i*nbobjs+j\&.
.PP
\fCkind\fP specifies the kind of distance as a OR'ed set of \fBhwloc_distances_kind_e\fP\&. Kind \fBHWLOC_DISTANCES_KIND_HETEROGENEOUS_TYPES\fP will be automatically added if objects of different types are given\&.
.PP
\fCflags\fP configures the behavior of the function using an optional OR'ed set of \fBhwloc_distances_add_flag_e\fP\&.
.SS "int hwloc_distances_release_remove (\fBhwloc_topology_t\fP topology, struct \fBhwloc_distances_s\fP * distances)"
.PP
Release and remove the given distance matrice from the topology\&. This function includes a call to \fBhwloc_distances_release()\fP\&.
.SS "int hwloc_distances_remove (\fBhwloc_topology_t\fP topology)"
.PP
Remove all distance matrices from a topology\&. Remove all distance matrices, either provided by the user or gathered through the OS\&.
.PP
If these distances were used to group objects, these additional Group objects are not removed from the topology\&.
.SS "int hwloc_distances_remove_by_depth (\fBhwloc_topology_t\fP topology, int depth)"
.PP
Remove distance matrices for objects at a specific depth in the topology\&. Identical to \fBhwloc_distances_remove()\fP but only applies to one level of the topology\&.
.SS "static int hwloc_distances_remove_by_type (\fBhwloc_topology_t\fP topology, \fBhwloc_obj_type_t\fP type)\fC [inline]\fP, \fC [static]\fP"
.PP
Remove distance matrices for objects of a specific type in the topology\&. Identical to \fBhwloc_distances_remove()\fP but only applies to one level of the topology\&.
.SH "Author"
.PP
Generated automatically by Doxygen for Hardware Locality (hwloc) from the source code\&.
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