发明申请
- 专利标题: Method and Apparatus for Conserving Power by Throttling Instruction Fetching When a Processor Encounters Low Confidence Branches in an Information Handling System
- 专利标题(中): 当处理器在信息处理系统中遇到低置信度时通过调节指令获取来节省电力的方法和装置
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申请号: US11733589申请日: 2007-04-10
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公开(公告)号: US20080256345A1公开(公告)日: 2008-10-16
- 发明人: Pradip Bose , Alper Buyuktosunoglu , Chen-Yong Cher , Michael Karl Gschwind , Ravi Nair , Robert Alan Philhower , Wolfram Sauer , Raymond Cheung Yeung
- 申请人: Pradip Bose , Alper Buyuktosunoglu , Chen-Yong Cher , Michael Karl Gschwind , Ravi Nair , Robert Alan Philhower , Wolfram Sauer , Raymond Cheung Yeung
- 申请人地址: US TX Austin
- 专利权人: IBM Corporation
- 当前专利权人: IBM Corporation
- 当前专利权人地址: US TX Austin
- 主分类号: G06F7/38
- IPC分类号: G06F7/38
摘要:
An information handling system includes a processor that throttles the instruction fetcher whenever the inaccuracy, or lack of confidence, in branch predictions for branch instructions stored in a branch instruction queue exceeds a predetermined threshold confidence level of inaccuracy or error. In this manner, fetch operations slow down to conserve processor power when it is likely that the processor will mispredict the outcome of branch instructions. Fetch operations return to full speed when it is likely that the processor will correctly predict the outcome of branch instructions.
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