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.

中文翻译：

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ParTAA：混合临界机载系统的实时多处理器

混合临界系统，其中具有不同临界级别的多个系统共享一个硬件平台，需要在具有不同临界级别的任务之间进行隔离。隔离可以通过基于软件的解决方案来实现，也可以通过硬件级分区来实施。非对称多处理器架构以未充分利用的硬件资源为代价提供基于硬件的隔离，并且内核间通信机制通常是此类架构中的单点故障。相比之下，分区单处理器以有限的可扩展性为代价提供有效的资源利用。我们提出了一种专为混合临界机载系统设计的分区实时非对称架构（PaRTAA），在处理元素内具有强大的分区功能，用于在具有不同重要性的任务之间建立隔离。处理元素的粒度提供了有效的资源利用，其中相互依赖的任务共享相同的处理元素以进行顺序执行，同时保持隔离，独立的任务根据系统要求在不同的处理元素上同时执行。