Locality Group Hierarchy

The APIs described in this section enable the calling thread to navigate the lgroup hierarchy.

Locality groups that are closer to the root have more resources and a higher latency. Locality groups that are closer to the leaves have fewer resources and a lower latency. An lgroup can contain resources directly within its latency boundary. An lgroup can contain leaf lgroups that contain their own sets of resources. The resources of leaf lgroups are available to the lgroup that encapsulates those leaf lgroups.