A software-based calibration approach to increase the robustness of embedded systems
by Md. Al Maruf; Akramul Azim
International Journal of Embedded Systems (IJES), Vol. 13, No. 4, 2020

Abstract: Embedded systems often interact with dynamic environments requiring not only to meet deadlines but also to achieve a certain level of accuracy. Since the inaccuracy of a task output produces a similar adverse effect like timing violation, we propose a software-based calibration approach to increase the robustness of embedded systems by monitoring and comparing system component's output accuracy with a calibration standard to take actions for addressing any inaccuracy. The calibration standard is derived from a representative component's output with known high accuracy. As an example, we analyse the accuracy of a component that performs dynamic voltage and frequency scaling (DVFS) and explains the associated timing effects in terms of task schedulability. We also perform experiments on LITMUS^RT kernel to demonstrate the need and applicability of our calibration approach in the domain of embedded systems.

Online publication date: Tue, 27-Oct-2020

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