A Hardware-Scheduler for Fault Detection in RTOS-Based Embedded Systems

Nowadays, Real-Time Operating Systems (RTOSs) are often adopted in order to simplify the design of safety-critical applications. However, real-time embedded systems are sensitive to transient faults that can affect the system causing scheduling dysfunctions and consequently changing the correct syst...

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Bibliographic Details
Main Authors: Tarrillo, Jimmy, Pohls, Letícia Maria Bolzani, Vargas, Fabian
Format: Conference Proceeding
Language:English
Subjects:
Application software
Computer crashes
Design methodology
Digital systems
Embedded system
embedded systems
Fault detection
Hardware
Hardware-Scheduler
Operating systems
Real time systems
Real-Time Operating Systems
Timing
transient fault detection
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Summary:Nowadays, Real-Time Operating Systems (RTOSs) are often adopted in order to simplify the design of safety-critical applications. However, real-time embedded systems are sensitive to transient faults that can affect the system causing scheduling dysfunctions and consequently changing the correct system behavior. In this context, we propose a new hardware-based approach able to detect faults that change the tasks' execution time and/or the tasks' execution flow in embedded systems based on RTOS. To demonstrate the effectiveness and benefits of using the proposed approach, we implemented a hardware prototype named Hardware-Scheduler (Hw-S) that provides real-time monitoring of the Plasma Microprocessor's RTOS in order to detect the above mentioned types of faults. The Hw-S has been evaluated in terms of the introduced area overhead and fault detection capability.
DOI:10.1109/DSD.2009.224