Matrix of distances between a set of objects.
This matrix often contains latencies between NUMA nodes (as reported in the System Locality Distance Information Table (SLIT) in the ACPI specification), which may or may not be physically accurate. It corresponds to the latency for accessing the memory of one node from a core in another node. The corresponding kind is HWLOC_DISTANCES_KIND_FROM_OS | HWLOC_DISTANCES_KIND_FROM_USER. The name of this distances structure is "NUMALatency".
The matrix may also contain bandwidths between random sets of objects, possibly provided by the user, as specified in the