【研究性论文】RTOS Scheduler Implementation in Hardware and Software for Real

eric2013

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摘要：In order to enhance performance and improve
predictability of the real time systems, implementing some
critical operating system functionalities, like time
management and task scheduling, in software and others in
hardware is an interesting approach. Scheduling decision
for real-time embedded software applications is an
important problem in real-time operating system (RTOS)
and has a great impact on system performance. In this
paper, we evaluate the pros and cons of migrating RTOS
scheduler implementation from software to hardware. We
investigate three different RTOS scheduler implementation
approaches: (i) implemented in software running in the
same processor of the application tasks, (ii) implemented in
software running in a co-processor, and (iii) implemented
in hardware, while application tasks are running on a
processor. We demonstrate the effectiveness of each
approach by simulating and analyzing a set of benchmarks
representing different embedded application classes.