Efficient architectural exploration of TAGE branch predictor for embedded processors
Efficient architectural exploration of TAGE branch predictor for embedded processors
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嵌入式处理器 TAGE 分支预测器的高效架构探索
DOI:
10.1016/j.mejo.2019.04.019
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发表时间:
2019-06
影响因子:
2.2
通讯作者:
Qiang Dou
中科院分区:
文献类型:
--
作者:
Libo Huang;Qi Yu;Chaobing Zhou;Jianqiao Ma;Zhisheng Li;Qiang Dou
Embedded processors are usually limited by silicon budget and power consumption, and utilizing limited resources to design an accurate branch predictor becomes an urgent issue. In this paper, we conduct design space explorations of TAGE predictor with ultra-small RAM for embedded processors. We first define the design space exploration problem, and then we propose PSO-based exploration framework to explore parameters of TAGE predictor. To conduct explorations with different purposes, we propose a composite metric which integrates prediction accuracy, area, and power consumption..For explorations only considering prediction accuracy, results show that compared with Bi-mode and GShare predictor, parameters explored by our method achieves better performance-area efficiency. For explorations considering the area and power consumption, results show that compared to accuracy-first exploration, area-first exploration achieves better performance-area and performance-power efficiency. In addition, area-first exploration and power-first exploration have similar results. We also study how training traces impact overall performance. Results show that the performance gap between different training traces is small and our method is insensitive to traces selected for exploration.
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期刊:
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