PaRTAA: A Real-time Multiprocessor for Mixed-Criticality Airborne Systems

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Mixed-criticality systems, where multiple systems with varying criticality-levels share a single hardware platform, require isolation between tasks with different criticality-levels. Isolation can be achieved with software-based solutions or can be enforced by a hardware level partitioning. An asymmetric multiprocessor architecture offers hardware-based isolation at the cost of underutilized hardware resources, and the inter-core communication mechanism is often a single point of failure in such architectures. In contrast, a partitioned uniprocessor offers efficient resource utilization at the cost of limited scalability. We propose a partitioned real-time asymmetric architecture (PaRTAA) specifically designed for mixed-criticality airborne systems, featuring robust partitioning within processing elements for establishing isolation between tasks with varying criticality. The granularity in the processing element offers efficient resource utilization where inter-dependent tasks share the same processing element for sequential execution while preserving isolation, and independent tasks simultaneously execute on different processing elements as per system requirements.

Original languageEnglish
Article number9118979
JournalIEEE Transactions on Computers
Issue number8
Pages (from-to)1221-1232
Number of pages12
Publication statusPublished - 2020


  • Single Core Equivalence
  • Processor Architecture
  • Avionics on Multi-core
  • Mixed-criticality Systems
  • Integrated Modular Avionics
  • Robust Resource Partitioning


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