发明申请
US20060184746A1 Reducing number of rejected snoop requests by extending time to respond to snoop request
失效
通过延长响应窥探请求的时间来减少被拒绝的窥探请求数
- 专利标题: Reducing number of rejected snoop requests by extending time to respond to snoop request
- 专利标题(中): 通过延长响应窥探请求的时间来减少被拒绝的窥探请求数
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申请号: US11056679申请日: 2005-02-11
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公开(公告)号: US20060184746A1公开(公告)日: 2006-08-17
- 发明人: Guy Guthrie , Hugh Shen , William Starke , Derek Williams
- 申请人: Guy Guthrie , Hugh Shen , William Starke , Derek Williams
- 主分类号: G06F13/28
- IPC分类号: G06F13/28
摘要:
A cache, system and method for reducing the number of rejected snoop requests. A “stall/reorder unit” in a cache receives a snoop request from an interconnect. The snoop request is entered in the first available latch of the stall/reorder unit unless the stall/reorder unit is full in which case the new snoop request is transmitted to a second unit configured to transmit a request to retry resending the new snoop request. Snoop requests have a higher priority than requests from processors and snoop requests are selected by the arbitration mechanism over processor requests unless the arbitration mechanism requests otherwise (“stall request”) to the stall/reorder unit. By snoop requests having a higher priority than processor requests, the number of snoop requests rejected is reduced. By having the arbitration mechanism issue a stall request, the processor will not be starved.
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