Virtualizing DVFS for Energy Minimization of Embedded Dual-OS Platform

Recent embedded systems require both traditional machinery control and information processing, such as network GUI handling. A dual-OS platform consolidates a real-time OS (RTOS) general-purpose (GPOS) to realize efficient software development on one physical processor. Although the attracts increasing attention, it often suffers from energy inefficiency in GPOS for guaranteeing responses of RTOS. This paper proposes an minimization method called DVFS virtualization, which allows running multiple policies dedicated RTOS GPOS, respectively. The experimental evaluation using commercial microcontroller showed that proposed hardware could change supply voltage within 500 ns reduce consumption typical applications by 60% best case compared conventional platforms. Furthermore, microprocessor achieved 15% reduction practical open-source at best.