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随着技术的发展,性能不再是衡量计算机系统的首要指标,取而代之的是性能功耗比.电源管理是降低能耗,进而提升性能功耗比的重要途径.中央处理器(CPU)是计算机系统中的主要耗能部件,传统的运行时处理器电源管理方法主要是动态变频.在一些多核处理器平台上,各个核心的频率不能独立调节,因此动态变频方法不能很好地发挥节能效果,或是会造成性能损失.CPUAutoplug是一种以全局负载水平为调节依据,结合了动态变频和自动调核两种节能措施的电源管理方法.该方法能在基本不影响性能的情况下,取得比纯动态变频更好的节能效果.在龙芯3A的参考平台上,实验数据表明CPUAutoplug可带来高达16%~20%的节能幅度.
With the development of technology, performance is no longer the primary measure of the computer system, replaced by the performance-power ratio. Power management is an important way to reduce energy consumption and thus improve the performance-to-power ratio.Central Processing Unit (CPU) The main energy-consuming components in the system and the traditional method of power management of run-time processor are mainly dynamic frequency conversion. On some multi-core processor platforms, the frequency of each core can not be adjusted independently, therefore, the dynamic frequency conversion method can not exert the energy- Or may result in performance loss.CPUAutoplug is a power management method based on the global load level for the adjustment, a combination of dynamic frequency conversion and automatic adjustment two energy-saving measures of the power management method.This method can not affect the performance of the basic situation, the ratio Pure dynamic frequency conversion better energy-saving effect in Godson 3A reference platform, the experimental data show that CPUAutoplug can bring up to 16% to 20% of the energy-saving rate.