发明授权
US08122222B2 Access speculation predictor with predictions based on a scope predictor
失效
基于范围预测器访问具有预测的投机预测因子
- 专利标题: Access speculation predictor with predictions based on a scope predictor
- 专利标题(中): 基于范围预测器访问具有预测的投机预测因子
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申请号: US12105360申请日: 2008-04-18
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公开(公告)号: US08122222B2公开(公告)日: 2012-02-21
- 发明人: Richard Nicholas , Eric E. Retter , Jeffrey A. Stuecheli
- 申请人: Richard Nicholas , Eric E. Retter , Jeffrey A. Stuecheli
- 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 Stephen J. Walder, Jr.; Diana R. Gerhardt
- 主分类号: G06F12/00
- IPC分类号: G06F12/00 ; G06F9/26 ; G06F9/34
摘要:
An access speculation predictor may predict whether to perform speculative retrieval of data for a data request from a main memory based on whether a scope predictor indicates whether a local or global request is predicted to be necessary to obtain the data for the data request. In particular, a first address and a scope predictor may be extracted from a first data request. A determination may be made as to whether a memory controller receiving the first data request is local to a source of the first data request or not. Speculative retrieval of the data for the first data request from a main memory may be controlled based on whether the memory controller is local to the source of the first data request and whether the scope predictor identifies whether a local or a global request is predicted to be necessary.
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