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• W2918551194 abstract "In this paper, we present RT-Gang: a novel real-time gang scheduling framework that enforces a one-gang-at-a-time policy. We find that, in a multicore platform, co-scheduling multiple parallel real-time tasks would require highly pessimistic worst-case execution time (WCET) and schedulability analysis-even when there are enough cores-due to contention in shared hardware resources such as cache and DRAM controller. In RT-Gang, all threads of a parallel real-time task form a real-time gang and the scheduler globally enforces the one-gang-at-a-time scheduling policy to guarantee tight and accurate task WCET. To minimize under-utilization, we integrate a state-of-the-art memory bandwidth throttling framework to allow safe execution of best-effort tasks. Specifically, any idle cores, if exist, are used to schedule best-effort tasks but their maximum memory bandwidth usages are strictly throttled to tightly bound interference to real-time gang tasks. We implement RT-Gang in the Linux kernel and evaluate it on two representative embedded multicore platforms using both synthetic and real-world DNN workloads. The results show that RT-Gang dramatically improves system predictability and the overhead is negligible." @default.
• W2918551194 created "2019-03-11" @default.
• W2918551194 creator A5025369995 @default.
• W2918551194 creator A5064659321 @default.
• W2918551194 date "2019-04-01" @default.
• W2918551194 modified "2023-09-24" @default.
• W2918551194 title "RT-Gang: Real-Time Gang Scheduling Framework for Safety-Critical Systems" @default.
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• W2918551194 doi "https://doi.org/10.1109/rtas.2019.00020" @default.
• W2918551194 hasPublicationYear "2019" @default.
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