发明授权
- 专利标题: Speculative memory prefetch
- 专利标题(中): 推测内存预取
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申请号: US11780283申请日: 2007-07-19
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公开(公告)号: US07930485B2公开(公告)日: 2011-04-19
- 发明人: Michael K Fertig , Patrick Conway , Kevin Michael Lepak , Cissy Xumin Yuan
- 申请人: Michael K Fertig , Patrick Conway , Kevin Michael Lepak , Cissy Xumin Yuan
- 申请人地址: KY Grand Cayman
- 专利权人: Globalfoundries Inc.
- 当前专利权人: Globalfoundries Inc.
- 当前专利权人地址: KY Grand Cayman
- 代理机构: Meyertons, Hood, Kivlin, Kowert & Goetzel, P.C.
- 代理商 Rory D. Rankin
- 主分类号: G06F13/00
- IPC分类号: G06F13/00
摘要:
A system and method for pre-fetching data from system memory. A multi-core processor accesses a cache hit predictor concurrently with sending a memory request to a cache subsystem. The predictor has two tables. The first table is indexed by a portion of a memory address and provides a hit prediction based on a first counter value. The second table is indexed by a core number and provides a hit prediction based on a second counter value. If neither table predicts a hit, a pre-fetch request is sent to memory. In response to detecting said hit prediction is incorrect, the pre-fetch is cancelled.
公开/授权文献
- US20090024835A1 SPECULATIVE MEMORY PREFETCH 公开/授权日:2009-01-22
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