Real-time operating systems

The software employed for the eritieal elements (memory, alarming, tripping, and eommunieating with the host eomputer) uses a real-time operating system and resides in the main CPU. The administrative CPU employs multitasking software that performs important tasks sueh as modem eommunieation, trending, and arehiving. 

The PC operating systems used today, however, e.g. MS-DOS, are not built for and are not suited for real-time applications. The multi-task real-time operating systems, e.g. RSX11M, that have been available with the traditional 16-bit... 

This computer can be booted under Windows or a proprietary NI real-time operating system. The real-time operating system is used for process control of the AIMS. This computer is responsible for monitoring all of the discrete and analog inputs from the AIMS as well as providing the discrete and analog outputs for process control. 

RMA Rubber Manufacturers Associa- RTOS real time operating system... 

Computer numerical control (CNC) means the digital control of machine tool units that consist of series of integrated mechanical actuators, electrical or electrohydraulic servomotors, power amplifiers, position and velocity sensors, and a dedicated computer running under a real-time operating system. 

The controller was implemented in hard real time at a sample frequency of 1 kHz on a 2.66 GHz Pentium P4-based processor on a AICMB800 motherboard with 512 MB DRAM using the RTAI Linux-based hard real time operating system and the Scilab/Scicos [30] based interface RTAI-lab [31]. The control design was performed using Octave [32]. ... 

All the software was written in a subset of C, running under a real-time operating system that complies with ARINC 653 (ARINC 1997). ARINC 653 is described in section 4. The operating system also supports a number of extensions to ARINC 653. 

The landing gear software runs under a bespoke operating system. This embedded real-time operating system extends the ARINC 653 standard and has been qualified to DO- 178B Level A for this aircraft programme. 

Lv, M., Guan, N., Zhang, Y., Deng, Q., Yu, G. Zhang, J. (2009). A survey of WCET analysis of real-time operating systems, 2009 IEEE International Conference on Embedded Software and Systems pp. 65-72. 

In order to simulate hardware parallel operations, SECONDS was constructed in a similar manner to real-time operating systems. To handle cases where multiple stages become simultaneously active, what we call Simulation Status Words were provided to place the behavioral sentence evaluation steps in proper order. 

The remainder of this paper is organized as follows in Section 2 we briefly introduce MrsP and the real-time operating systems (RTOS) on which we implemented and evaluated the effectiveness of the protocol. In Section 3 we point out the main challenges and issues encountered in the implementation of MrsP we discuss possible design choices and detail on the specific solutions adopted on each RTOS. In Section 4 we assess the runtime overheads and performances of our implementations. Section 5 discusses relevant related works. Finally, in Section 6 we summarize our efforts and outline our future lines of work. 

The justification for equipment diversity, or for the diversity of related I C system software such as a real time operating system, should extend to the equipment s components to ensure that actual diversity exists. For example, different manufacturers might use the same processor or Ucense the same operating system, thereby potentially incorporating common failure modes. Claims for diversity based only on a difference in manufacturers names are insufficient without consideration of this possibility. 

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