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arXiv · 2510.16896

FTI-TMR: A Fault Tolerance and Isolation Algorithm for Interconnected Multicore Systems

Yiming Hu
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Abstract

Two-Phase TMR conserves energy by partitioning redundancy operations into two stages and making the execution of the third task copy optional, yet it remains susceptible to permanent faults. Reactive-TMR (R-TMR) counters this by isolating faulty cores, handling both transient and permanent faults. However, the lightweight hardware required by R-TMR not only increases complexity but also becomes a single point of failure itself. To bypass isolated node constraints, this paper proposes a Fault Tolerance and Isolation TMR (FTI-TMR) algorithm for interconnected multicore systems. By constructing a stability metric to identify the most reliable nodes in the system, which then perform periodic diagnostics to isolate permanent faults. Experimental results show that FTI-TMR reduces task workload by approximately 30% compared with baseline TMR while achieving higher permanent fault coverage.

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Yiming Hu. 2025-10-19. FTI-TMR: A Fault Tolerance and Isolation Algorithm for Interconnected Multicore Systems. https://arxiv.org/abs/2510.16896

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