发明授权
- 专利标题: Method and system for handling stuck bits in cache directories
- 专利标题(中): 用于处理缓存目录中的卡位的方法和系统
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申请号: US11225640申请日: 2005-09-13
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公开(公告)号: US07689891B2公开(公告)日: 2010-03-30
- 发明人: Robert H. Bell, Jr. , Guy L. Guthrie , William J. Starke
- 申请人: Robert H. Bell, Jr. , Guy L. Guthrie , William J. Starke
- 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
- 代理商 Matthew W. Baca; Jack V. Musgrove
- 主分类号: G11C29/00
- IPC分类号: G11C29/00
摘要:
A method of handling a stuck bit in a directory of a cache memory which detects an error in a stored tag having an address field, a state field and an error-correction field, determines that the error is associated with a stuck bit of the directory member, marks the directory member as defective, and casts out corrected address information. The error is detected during processing of a cache directory access request, and is determined to be associated with a stuck bit of the directory member by attempting to correct a first error and then detecting a second error after the first correction attempt. The address information is cast out by routing a surrogate tag contained in a surrogate member of the cache directory through error-correction pipeline circuitry while transmitting the address information from the surrogate member to a cast-out machine.
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