SafeDE: A Low-Cost Hardware Solution to Enforce Diverse Redundancy in Multicores

Failure risk must be tiny in high-integrity systems, such as those cars, satellites and aircraft. Hence, safety measures deployed to avoid a single fault leading failure. Redundancy has been often used address this concern, but it proven insufficient if can cause the same error all redundant elements, which defeats purpose of redundancy for detection. scenario, diversity is implemented along with redundancy, being lockstep execution most popular diverse solution computing cores. However, classic solutions have non-negligible limitations hardware (e.g., half cores only are not even visible at user level), or software loop enforce staggering long costs performance). This paper tackles by providing an extended analysis evaluation SafeDE , Diversity Enforcement module combining short solutions, non-intrusiveness solutions. operate mode efficiently run independent tasks. In paper, we present SafeDE its rationale, application N-modular integration, showing performance area efficiency, behavior presence faults.