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首页> 外文期刊>IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems >Automatic Design Space Exploration of Register Bypasses in Embedded Processors
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Automatic Design Space Exploration of Register Bypasses in Embedded Processors

机译：嵌入式处理器中寄存器旁路的自动设计空间探索

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摘要

Register bypassing is a popular and powerful architectural feature to improve processor performance in pipelined processors by eliminating certain data hazards. However, extensive bypassing comes with a significant impact on cycle time, area, and power consumption of the processor. Recent research therefore advocates the use of partial bypassing in a processor. However, accurate performance evaluation of partially bypassed processors is still a challenge, primarily due to the lack of bypass-sensitive retargetable compilation techniques. No existing partial bypass exploration framework estimates the power and area overhead of partial bypassing. As a result, the designers end up making suboptimal design decisions during the exploration of partial bypass design space. This paper presents PBExplore - an automatic design-space-exploration framework for register bypasses. PBExplore accurately evaluates the performance of a partially bypassed processor using a bypass-sensitive compilation technique. It synthesizes the bypass control logic and estimates the area and energy overhead of each bypass configuration. PBExplore is thus able to effectively perform multidimensional exploration of the partial bypass design space. We present experimental results of benchmarks from the MiBench suite on the Intel XScale architecture on and demonstrate the need, utility, and exploration capabilities of PBExplore.
机译：寄存器旁路是一种流行且强大的体系结构功能，可通过消除某些数据危害来提高流水线处理器中的处理器性能。但是，广泛的旁路会对处理器的周期时间，面积和功耗产生重大影响。因此，最近的研究提倡在处理器中使用部分旁路。但是，部分旁路处理器的准确性能评估仍然是一个挑战，主要是由于缺乏对旁路敏感的可重新定向的编译技术。没有现有的部分旁路探索框架可以估算部分旁路的功率和面积开销。结果，设计师在探索部分旁路设计空间的过程中最终做出了次优的设计决策。本文介绍了PBExplore-一种用于寄存器旁路的自动设计空间探索框架。 PBExplore使用旁路敏感的编译技术准确评估部分旁路处理器的性能。它综合了旁路控制逻辑，并估计了每种旁路配置的面积和能量开销。因此，PBExplore能够有效地对部分旁路设计空间进行多维探索。我们提供了基于Intel XScale架构的MiBench套件中的基准测试的实验结果，并演示了PBExplore的需求，实用性和探索能力。

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