Multi-Path Bound for DAG Tasks

This paper studies the response time bound of a DAG (directed acyclic graph) task. Recently, the idea of using multiple paths to bound the response time of a DAG task, instead of using a single longest path in previous results, was proposed and led to the so-called multi-path bound. Multi-path bound...

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Veröffentlicht in:IEEE transactions on computer-aided design of integrated circuits and systems 2024-11, p.1-1
Hauptverfasser: He, Qingqiang, Guan, Nan, Zhao, Shuai, Lv, Mingsong
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Sprache:eng
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Zusammenfassung:This paper studies the response time bound of a DAG (directed acyclic graph) task. Recently, the idea of using multiple paths to bound the response time of a DAG task, instead of using a single longest path in previous results, was proposed and led to the so-called multi-path bound. Multi-path bounds can greatly reduce the response time bound and significantly improve the schedulability of DAG tasks. This paper derives a new multi-path bound and proposes an optimal algorithm to compute this bound. We further present a systematic analysis on the dominance and the sustainability of three existing multi-path bounds and the proposed multi-path bound. Our bound theoretically dominates and empirically outperforms all existing multi-path bounds. What's more, the proposed bound is the only multi-path bound that is proved to be self-sustainable.
ISSN:0278-0070
DOI:10.1109/TCAD.2024.3507563