发明申请
- 专利标题: Predictors with Adaptive Prediction Threshold
- 专利标题(中): 具有自适应预测阈值的预测器
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申请号: US12473764申请日: 2009-05-28
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公开(公告)号: US20100306515A1公开(公告)日: 2010-12-02
- 发明人: Muawya M. Al-Otoom , Timothy H. Heil , Anil Krishna , Ken V. Vu
- 申请人: Muawya M. Al-Otoom , Timothy H. Heil , Anil Krishna , Ken V. Vu
- 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
- 主分类号: G06F9/38
- IPC分类号: G06F9/38
摘要:
An adaptive prediction threshold scheme for dynamically adjusting prediction thresholds of entries in a Pattern History Table (PHT) by observing global tendencies of the branch or branches that index into the PHT entries. A count value of a prediction state counter representing a prediction state of a prediction state machine for a PHT entry is obtained. Count values in a set of counters allocated to the entry in the PHT are changed based on the count value of the entry's prediction state counter. The prediction threshold of the prediction state machine for the entry may then be adjusted based on the changed count values in the set of counters, wherein the prediction threshold is adjusted by changing a count value in a prediction threshold counter in the entry, and wherein adjusting the prediction threshold redefines predictions provided by the prediction state machine.
公开/授权文献
- US08078852B2 Predictors with adaptive prediction threshold 公开/授权日:2011-12-13