JCSE, vol. 16, no. 3, pp.129-142, 2022
DOI: http://dx.doi.org/10.5626/JCSE.2022.16.3.129
Isolation of Shared Resources for Mixed-Criticality AUTOSAR Applications
Junghwan Lee and Myungjun Kim
R&D Center, FAW, Changchun, Jilin, China
Department of Computer Science, Chungbuk National University, Cheongju, South Korea
Abstract: Temporal isolation without consideration of spatial isolation has been attained for mixed-criticality systems, while spatial
isolation is required more strictly in the automotive industry. Moreover, tasks with different criticality levels sharing the
same resources are a common requirement for safety-critical automotive applications. Such tasks are more challenging to
spatially isolate due to context sharing to access the same resources. Nevertheless, safety certification cannot be received
without addressing spatial isolation. This paper argues that traditional real-time locking solutions are unsuitable for
mixed-criticality applications within the automotive open system architecture (AUTOSAR). We adopted the server task
named resource server for spatial isolation within AUTOSAR limitations. We formalized a software component model
for reducing design space and proposed the mapping algorithms. Properties of resource servers within AUTOSAR were
formally analyzed for blocking delays, task priority assignment, and utilization analysis. Case studies in a powertrain
domain of an electric vehicle were carried out to assess the proposed solutions.
Keyword:
Real-time scheduling; Mixed-criticality system; AUTOSAR
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