FreshCache: Statically and dynamically exploiting dataless ways

摘要

Last level caches (LLCs) account for a substantial fraction of the area and power budget in many modern processors. Two recent trends — dwindling die yield that falls off sharply with larger chips and increasing static power — make a strong case for a fresh look at LLC design. Inclusive caches are particularly interesting because many commercially successful processors use inclusion to ease coherence at a cost of some data being stale or redundant.