Design Of Real-time Operating System Research Articles

System design and research of multi-channel electroacupuncture instrument

This paper introduces the development history, working principle, curative effect under different output waveforms and the hardware and software design of the system. The proportional constant current output circuit is analyzed in detail. A system structure of electroacupuncture instrument based on modular design is proposed. The system structure mainly includes multi-channel electroacupuncture control module and display control module, which are connected through CAN bus. Multi-channel electroneedle control module adopts embedded processor and real-time operating system design, display control module is application level processor, running embedded Linux system design. The system has reasonable structure design and high expansibility, which is convenient for further research.

CPU Scheduling Visualization

Scheduling is a key concept in computer multitasking and multiprocessing operating system design, and in real-time operating system design. CPU scheduling is the basis of multiprogramming operating systems by switching the CPU among process; the operating system can make the computer more productive, scheduling algorithms are widely used in communications networks and in operating systems to allocate resources to competing tasks. In this paper, visual interfaces for CPU scheduling algorithms were designed by using Visual Basic6 language. They may use to learn users about this algorithms and how they work

Real-time Operating System for Wireless Sensors powered by Renewable Energy Source

Energy management is a central problem in real-time systems design, in particular for embedded wireless devices such as sensor devices. In our work, we aim at the improvement of real-time operating systems that are powered by renewable energy source (solar energy, for example). The objective of this work is to develop software components for the design of real-time operating systems. We provide an on-line scheduling scheme, named Earliest Deadline with energy guarantee (EDeg), in order to address the limitations in energy harvesting systems. We also integrate EDeg scheduling algorithm into CLEOPATRE open-source component library, a patch to Linux/RTAI and evaluate the scheduling overheads of EDeg observed under Linux/RTAI.

Hardware/software partitioning of operating systems: focus on deadlock detection and avoidance

As multiprocessor system-on-a-chip (MPSoC) designs become more common, hardware/software codesign engineers face new challenges involving operating system integration. To speed up operating system/MPSoC codesign, the paper presents recent research in hardware/software partitioning of a real-time operating system (RTOS). After a brief overview of the δ hardware/software RTOS design framework, the authors focus on new results in deadlock detection and avoidance. Among various configured RTOS/MPSoC designs in this research, they show an example where a system with the deadlock detection hardware unit (DDU) achieves a 46% speed-up of application execution time over a system with deadlock detection in software. Similarly, they show another example where a system with the deadlock avoidance hardware unit (DAU) not only automatically avoids deadlock but also achieves a 44% speed-up of application execution time over a system avoiding deadlock in software; furthermore, in our example, the DAU only consumes 0.005% of the MPSoC total chip area.

Prozeßgerechter Entwurf von Monitoren in Echtzeitbetriebssystemen / Process-considering design of real-time operating system monitors

Article Prozeßgerechter Entwurf von Monitoren in Echtzeitbetriebssystemen / Process-considering design of real-time operating system monitors was published on December 1, 1984 in the journal it - Information Technology (volume 26, issue 1-6).

A Methodological Approach to the Design of Real-Time Operating Systems

Increasing diversity in underlying architectures has urged for more research in design methodology for Real Time Operating Systems . This paper describes a proposal for R.T.O.S. production by quasi-parallel simulation and cross compilation. Two compilers which accept nearly the same language ( Pascal extended with processes and monitors ) are used jointly. Using the first one, one is able to design a system, to debug it and to get some rough indications on its quantitative behaviour. With the second compiler it is possible to obtain an operational system for a given target computer configuration. The project is currently under evaluation at the University of Rennes. Several benefits (reduced production costs, increased software quality, …) are hoped to be drawn from the approach. The tools associated with the methodology are furthermore designed to be highly portable.

A methodological approach to the design of real-time operating systems

Increasing diversity in underlying architectures has urged for more research in design methodology for Real · Time Operating Systems. This paper describes a proposal for R.T.O.S. production by quasi-parallel simulation and cross compilation. Two compilers which accept nearly the same language ( Pascal extended with processes and monitors) are used jointly. Using the first one, one is able to design a system, to debug it and to get some rough indications on its quantitative behaviour. With the second compiler it is possible to obtain an operational system for a given target computer configuration. The project is currently under evaluation at the University of Rennes. Several benefits (reduced production costs, increased software quality, …) are hoped to be drawn from the approach. The tools associated with the methodology are furthermore designed to be highly portable.