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Scheduling and analysis of real-time task graph models with nested locks
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- Du, He (author)
- Northeastern Univ, Sch Comp Sci & Engn, Shenyang, Peoples R China.
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- Jiang, Xu (author)
- Northeastern Univ, 11 Wenhua St, Shenyang, Liaoning, Peoples R China.
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- Lv, Mingsong (author)
- Northeastern Univ, 11 Wenhua St, Shenyang, Liaoning, Peoples R China.
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- Northeastern Univ, Sch Comp Sci & Engn, Shenyang, Peoples R China Northeastern Univ, 11 Wenhua St, Shenyang, Liaoning, Peoples R China. (creator_code:org_t)
- Elsevier, 2021
- 2021
- English.
- In: Journal of systems architecture. - : Elsevier. - 1383-7621 .- 1873-6165. ; 114
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Locking protocol is a crucial component in scheduling of real-time systems. The digraph real-time task model (DRT) is the state-of-the-art graph-based task model, which is a generalization of most previous real-time task models. To our best knowledge, the only work addressing resource sharing problem in DRT task model proposes a resource sharing protocol, called ACP, as well as a scheduling strategy EDF+ACP. Although EDF+ACP is optimal for scheduling DRT tasks with non-nested resource access, it cannot handle the situation of nested resource accesses. In this paper, we propose a new protocol, called N-ACP, by modifying ACP to manage nested resource accesses in task graph models. We apply N-ACP to EDF scheduling to obtain a new scheduling strategy EDF+N-ACP. We develop schedulability analysis techniques for EDF+N-ACP and evaluate its performance by a widely-used quantitative metrics speedup factor. We derive its speedup factor as a function of the maximal nesting level of resource accesses in the system.
Subject headings
- NATURVETENSKAP -- Data- och informationsvetenskap -- Datavetenskap (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences -- Computer Sciences (hsv//eng)
Keyword
- Locking protocol
- Nested resource sharing
- Real-time system
- Schedulability analysis
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Du, He
- Jiang, Xu
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- Yang, Tao
- Wang, Yi
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