T-DVS:基于逆温现象的温度感知分布式交换机

Jinsoo Park, H. Cha
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引用次数: 4

摘要

动态电压和频率缩放(DVFS)是一种广泛使用的降低移动设备功耗的方法。该方案根据特定的调速器进行频率缩放,并设置与频率配对的工作电压。温度是影响设备运行的关键参数之一。实际上,在工作电压中存在一个保护带,以确保即使在最恶劣的温度下处理器也能安全运行。DVFS可以根据标称条件下的工作电压进行优化。在本文中,我们提出了一种温度感知的分布式交换机(T-DVS),它可以有效地降低电压保护带。我们探索在不同温度下为频率提供最小工作电压的机会,并实现动态电压控制方案以优化功耗。利用多核应用处理器验证了T-DVS在各种热条件下的有效性。我们通过实验观察到,无论热条件和芯片特性如何,T-DVS都会导致电压增益而不会导致性能下降。我们通过使用现成的智能手机表明,该方案获得的电压增益导致电池寿命增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
T-DVS: Temperature-aware DVS based on Temperature Inversion Phenomenon
Dynamic Voltage and Frequency Scaling (DVFS) is a widely used methodology to reduce the power consumption of mobile devices. This scheme performs frequency scaling in accordance with a specific governor and sets an operating voltage to be paired with the frequency. Temperature is one of the critical parameters affecting device operation. Practically, a guard-band exists in the operating voltage to ensure safe processor operation even at the worst temperature. DVFS can be optimized in terms of operating voltage under nominal conditions. In this paper, we propose a Temperature-aware DVS (T-DVS) that aggressively reduces the voltage guard-band. We explore the opportunity of providing the minimum operating voltages for frequencies at different temperatures and realize a dynamic voltage control scheme to optimize power consumption. The effectiveness of T-DVS is validated under various thermal conditions by using multi-core application processor. We experimentally observe that T-DVS leads to voltage gain without performance degradation regardless of both thermal conditions and chip characteristics. We show by using off-the-shelf smartphones that the voltage gain achieved by the scheme results in battery lifetime increment.
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