Distances between objects.
One object may contain a distance structure describing distances between all its descendants at a given relative depth. If the containing object is the root object of the topology, then the distances are available for all objects in the machine.
The distance may be a memory latency, as defined by the ACPI SLIT specification. If so, the
latency pointer will not be
NULL and the pointed array will contain non-zero values.
In the future, some other types of distances may be considered. In these cases,
latency will be