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Intermittently powered devices rely on opportunistic energy-harvesting tofunction, leading to recurrent power interruptions. This paper introduces DiCA,a proposal for a hardware/software co-design to create differentialcheck-points in intermittent devices. DiCA leverages an affordable hardwaremodule that simplifies the check-pointing process, reducing the check-pointgeneration time and energy consumption. This hardware module continuouslymonitors volatile memory, efficiently tracking modifications and determiningoptimal check-point times. To minimize energy waste, the module dynamicallyestimates the energy required to create and store the check-point based ontracked memory modifications, triggering the check-pointing routine optimallyvia a nonmaskable interrupt. Experimental results show the cost-effectivenessand energy efficiency of DiCA, enabling extended application activity cycles inintermittently powered embedded devices.

DiCA: A Hardware-Software Co-Design for Differential Checkpointing in Intermittently Powered Devices