Hibernus: Sustaining Computation During Intermittent Supply for Energy-Harvesting Systems
Hibernus: Sustaining Computation During Intermittent Supply for Energy-Harvesting Systems
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DOI：
10.1109/les.2014.2371494
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发表时间：
2015-03-01
影响因子：
1.6
通讯作者：
Benini, Luca
中科院分区：
文献类型：
--
作者：
Balsamo, Domenico;Weddell, Alex S.;Benini, Luca
未来能量收集系统面临的一个关键挑战是经常产生的不连续电源。我们提出了一种新的方法，Hibernus，它使计算能够在间歇性供应期间持续进行。该方法具有较低的能量和时间开销，这是通过反应性休眠实现的：仅在电源即将丢失时保存一次系统状态，然后休眠直到电源恢复。我们在具有FRAM非易失性存储器的处理器上实验验证了该方法，允许它仅使用存储在其去耦电容中的能量进行反应性休眠。与最近提出的技术相比，该方法将处理器时间和能量开销分别减少了76%-100%和49%-79%。
A key challenge to the future of energy-harvesting systems is the discontinuous power supply that is often generated. We propose a new approach, Hibernus, which enables computation to be sustained during intermittent supply. The approach has a low energy and time overhead which is achieved by reactively hibernating: saving system state only once, when power is about to be lost, and then sleeping until the supply recovers. We validate the approach experimentally on a processor with FRAM nonvolatile memory, allowing it to reactively hibernate using only energy stored in its decoupling capacitance. When compared to a recently proposed technique, the approach reduces processor time and energy overheads by 76%-100% and 49%-79% respectively.