標題: Filtering of unnecessary branch predictor lookups for low-power processor architecture
作者: Chiao, Wei-Hau
Chung, Chung-Ping
資訊工程學系
Department of Computer Science
關鍵字: branch prediction;BTB;lookup filtering;low power;pipelined processor
公開日期: 1-Jul-2008
摘要: Efforts to reduce power consumption of processors have gained much attention recently. Dynamic branch predictor, including BTB, is exercised in every instruction cycle, yet branch instructions only constitute a small percentage of instructions during program execution. This study proposes a novel method to collect the next branch distances of the recent branch instructions at runtime, in order to eliminate unnecessary branch predictor lookups. Simulation results show that the proposed design reduces the energy consumption in the dynamic branch predictor by an average of 56.95% without performance degradation. The proposed method is fully compatible with BPP and SEPAS, and saves more energy than PPD, Lazy BTB, and EIB does.
URI: http://hdl.handle.net/11536/8687
ISSN: 1016-2364
期刊: JOURNAL OF INFORMATION SCIENCE AND ENGINEERING
Volume: 24
Issue: 4
起始頁: 1127
結束頁: 1142
Appears in Collections:Articles


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