公开(公告)号：US20170177502A1

公开(公告)日：2017-06-22

申请号：US14975752

申请日：2015-12-19

Applicant: Intel Corporation

Inventor： DANIEL GREENSPAN ,  BLAISE FANNING ,  YOAV LOSSIN ,  ASAF RUBINSTEIN

IPC: G06F12/12 ,  G06F12/08

CPC classification number: G06F12/123 ,  G06F12/0891 ,  G06F12/0897 ,  G06F2212/1016 ,  G06F2212/1028 ,  G06F2212/60 ,  Y02D10/13

Abstract: A method and apparatus are described for a shared LRU policy between cache levels. For example, one embodiment of the invention comprises: a level N cache to store a first plurality of entries; a level N+1 cache to store a second plurality of entries; the level N+1 cache to initially be provided with responsibility for implementing a least recently used (LRU) eviction policy for a first entry until receipt of a request for the first entry from the level N cache at which time the entry is copied from the level N+1 cache to the level N cache, the level N cache to then be provided with responsibility for implementing the LRU policy until the first entry is evicted from the level N cache, wherein upon being notified that the first entry has been evicted from the level N cache, the level N+1 cache to resume responsibility for implementing the LRU eviction policy with respect to the first entry.