Low power fault tolerance scheduling scheme in DVS-enabled real-time systems
Yi-Wen Zhang, Huizhen Zhang · International Journal of High Performance Systems Architecture · 2016
This paper investigates the power management and fault tolerance in DVS-enabled real-time systems based on the EDF scheme. The power management is achieved via dynamic voltage scaling (DVS) and fault tolerance is achieved via checkpoint scheme. We estimate a critical speed which effectively decreases the energy consumption by the associated frequency dependent and independent devices. The proposed low power fault tolerance scheduling scheme includes two parts: 1) an offline solution to compute the optimal number of checkpoints and the running speed; 2) an online speed reduction mechanism based on the actual workload by using the slack time. The experimental results show that the proposed approach which is compared to the previous method (Melhem et al., 2004) significantly reduces the energy consumption.