2025/09/04 by Zhou, Zhouyi, Liu, Zhili, Zhang, Shancong +6
#68M20 #D.4.7 #FOS: Computer and information sciences #Operating Systems (cs.OS)
paper · doi:10.48550/arxiv.2509.03855
Real-time responsiveness in Linux is often constrained by interrupt contention and timer handling overhead, making it challenging to achieve sub-microsecond latency. This work introduces an interrupt isolation approach that centralizes and minimizes timer interrupt interference across CPU cores. By enabling a dedicated API to selectively invoke timer handling routines and suppress non-critical inter-processor interrupts, our design significantly reduces jitter and response latency. Experiments conducted on an ARM-based multicore platform demonstrate that the proposed mechanism consistently achieves sub-0.5 us response times, outperforming conventional Linux PREEMPT-RT configurations. These results highlight the potential of interrupt isolation as a lightweight and effective strategy for deterministic real-time workloads in general-purpose operating systems.