With the explosive growth of battery-free and energy-harvesting devices, the energy harvesting powered system has gained more attentions and been widely used in different fields. However, unstable harvested energy is a challenge of energy-harvesting devices since the program execution would be interrupted frequently. Non-volatile processor (NVP) is proposed to back up volatile logics before energy depletion and recover the system status after energy resumption. This paper takes the challenge of forward progress improvement issue in NVP system and proposes a lightweight online backup strategy which tries to aggressively use energy in capacitor after receiving energy warnings. We also build a flexible and accurate simulation tool for NVP system evaluation. The experimental results show an average of 24.2% and 13.7% improved forward progress compared with instant backup method and the most related work, respectively.

随着无电池和能量收集设备的爆炸性增长，能量收集动力系统受到了越来越多的关注，并在不同领域得到了广泛的应用。但是，不稳定的收集能量是能量收集设备的一个挑战，因为程序执行会经常中断。提出了非易失性处理器（NVP），以在能量耗尽之前备份易失性逻辑，并在能量恢复之后恢复系统状态。本文接受了NVP系统中前进改进问题的挑战，提出了一种轻量级的在线备份策略，该策略试图在收到能量警告后积极使用电容器中的能量。我们还为NVP系统评估构建了灵活而准确的仿真工具。实验结果显示平均为24.2％和13。