基于硬件剖析的DVS能耗优化

如何在满足系统性能要求的前提下尽可能降低系统能耗已成为嵌入式系统设计所面临的挑战之一。动态电压调节是降低能耗的有效技术，它能通过硬件剖析来识别“热点”，根据指令级并行(ILP)的变化情况动态调节处理器的电压和速度。实验表明该方法可在性能损失较小的情况下，有效节省能耗。

Optimization of Power Consumption Through Dynamic Voltage Scaling Based on Hardware Profiling

Embedded systems are often severely energy-constrained. The need to meet real-time requirements while staying within energy constraint presents new design challenges. Dynamic voltage scaling (DVS) is an effective technique for reducing processor energy consumption. The technique uses a hardware profiling scheme to identify "hotspot" , adjusts processor voltage and speed in response to the amount of ILP observed. In comparison to a processor running at a fixed voltage and speed, the approach can improve energy consumption with less impact on the performance.