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如何有效地利用处理器消耗的能量而得到尽可能高的性能成为了目前体系结构研究的热点,在研究中,结构级的功耗评估工具无疑具有重要的作用.在现有的结构级功耗模拟器中,往往只考虑了动态电路以及全定制实现方法下的功耗刻画,而忽略了以静态电路和标准单元设计为主的ASIC设计方法对处理器功耗带来的影响.由此,结合一款高性能、低功耗通用处理器——龙芯2号的具体实现,对其设计特点和功耗特性进行分析,实现了以龙芯2号处理器为基本研究对象的结构级功耗评估方法.该评估方法充分考虑了CMOS静态电路的结构级功耗刻画方法,因此更加适合目前以ASIC设计方法为主的高性能处理器结构的功耗评估.该结构级功耗评估方法与RTL级的功耗评估方法相比,具有速度快和灵活性好的优点.在2.4GHz的IntelXeon上,该功耗评估方法的速度约为300K/s,是RTL级的评估方法的5000倍,而且误差很小.
How to effectively use the energy consumed by the processor to obtain the highest possible performance has become a hot research topic in the current architecture, and structural-level power evaluation tools undoubtedly play an important role in the research.In the existing structure-level power consumption Simulator, often only consider the dynamic circuit and full customization of power consumption under the description, while ignoring the static circuit and standard cell design-based ASIC design method of processor power consumption.Therefore, Based on the implementation of a high-performance and low-power general-purpose processor, Godson-2, the design features and power consumption characteristics of Godson-2 processor are analyzed, and the structural power consumption evaluation based on Godson-2 processor is realized Method.This evaluation method fully considers the structure-level power consumption characterization method of CMOS static circuits, and is therefore more suitable for the power consumption evaluation of the high-performance processor architecture mainly based on the ASIC design method.This structure-level power consumption evaluation method is compared with the RTL level This method of evaluating power consumption is about 300K / s on a 2.4GHz Intel Xeon, which is 5 of the RTL level evaluation method 000 times, and the error is small.