1. An apparatus comprising: a tracking list including a set of entries, each entry of the set of entries to store state information based on a respective touch message indicating that a respective memory group has been touched, the memory group including one or more memory regions in a set of memory regions, each entry having: a valid field to store respective validity data specifying whether the entry stores a set of default data; and a group field to store a respective memory group identifier associating a memory region in the set of memory regions with a respective memory group in one or more memory groups; and touch detection logic coupled to the tracking list to generate access information specific to a memory group, the access information describing an accessing of one or more memory regions of the memory group, wherein the access information is generated based on the validity data in a first entry of the set of entries and the memory group identifier in the first entry.