发明授权
- 专利标题: Victim cache replacement
- 专利标题(中): 受害者缓存替换
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申请号: US12177912申请日: 2008-07-23
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公开(公告)号: US08327072B2公开(公告)日: 2012-12-04
- 发明人: Guy L. Guthrie , Thomas L. Jeremiah , William J. Starke , Phillip G. Williams
- 申请人: Guy L. Guthrie , Thomas L. Jeremiah , William J. Starke , Phillip G. Williams
- 申请人地址: US NY Armonk
- 专利权人: International Business Machines Corporation
- 当前专利权人: International Business Machines Corporation
- 当前专利权人地址: US NY Armonk
- 代理机构: Yudell Isidore Ng Russell PLLC
- 主分类号: G06F12/00
- IPC分类号: G06F12/00
摘要:
A data processing system includes a processor core having an associated upper level cache and a lower level victim cache. In response to a memory access request of the processor core, the lower level cache victim determines whether the memory access request hits or misses in the directory of the lower level victim cache, and the upper level cache determines whether a castout from the upper level cache is to be performed and selects a victim coherency granule for eviction from the upper level cache. In response to determining that a castout from the upper level cache is to be performed, the upper level cache evicts the selected victim coherency granule. In the eviction, the upper level cache reads out the victim coherency granule from the data array of the upper level cache only in response to an indication that the memory access request misses in the directory of the lower level victim cache.
公开/授权文献
- US20100023695A1 Victim Cache Replacement 公开/授权日:2010-01-28