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Abstract
The paradigm changes from federated architecture to integrated architecture in the real time system introduces a partitioned system to ensure fault isolation and for scheduling the hierarchy scheduling at the global level between partition and local in partition. Integrated architecture based on partitioned system with hierarchical scheduling is referred as real time hierarchical system which is a solution to increase efficiency in terms of hardware cost and size. This approach increasing the complexity of the integration process including the handling of faults. In this paper the authors describe a proposal with three components for dealing with fault tolerant in real time hierarchical systems by handling fault in task level, partition level and distributed level. The contribution of this proposal is the mechanism for building fault tolerant system on real time hierarchical system.
Highlights
The developments of microprocessor technology impact on increasing computational speed
In the backup partition tasks are divided into Context Dependent Task (CDT) and Context Independent Task (CIT)
Examples of avionics use the distributed function of avionics packaged in a self-contained units that called Line-Replaceable Unit (LRU) [8] In addition, automotive traditional design is based on the concept Federated architectures which integrates hardware and software on Electronic Control Unit (ECU) independently based on loosely interconnected functions
Summary
The developments of microprocessor technology impact on increasing computational speed. It is wasteful to run single task or application on modern microprocessor, to improve processor utility, researcher introduce using parallel computing to run multiple applications and virtualization to run multiple operating systems on one platform This method initially applied to the needs of the data center, this development affected the real time system with embedded processor which experienced a change in the development paradigm. The problem of resource sharing and scheduling between real time applications on shared hardware platform needs to be made strictly related to CPU time (temporal) and memory resources (spatial) This causes integrated architecture to be implemented in a partitioned scheme where each application is run on a partition that guarantees temporal and spatial isolation with other partitions. This paper give insight on some proposal on fault tolerant scheduling method for real time hierarchical systems that can handle potential faults at each level of hierarchy
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