S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Computer Science and Engineering (컴퓨터공학부) Journal Papers (저널논문_컴퓨터공학부)
Fast and Time-Accurate Cosimulation with OS Scheduler Modeling
- Yi, Youngmin; Kim, Dohyung; Ha, Soonhoi
- Issue Date
- Springer Verlag
- Design Automation for Embedded Systems, Vol. 8, No. 2-3, pp. 211-228, 2003
- Hardware/Software cosimulation is the key process to shorten the design turn around time. We have proposed a novel technique, called virtual synchronization, for fast and time accurate cosimulation that involves component simulators running concurrently and interacting with each other. In this paper, we further extend the virtual synchronization technique with OS modeling for the case where multiple software tasks are executed under the supervision of a real-time operating system. The OS modeler models the RTOS overheads of context switching and tick interrupt handling as well as preemption behavior. While maintaining the timing accuracy to an acceptable level below a few percents, we could reduce the simulation time drastically compared with existent conservative approaches by removing the need of time synchronization between simulators. It is confirmed with a preliminary experiment on a multimedia example that consists of four real-life tasks.
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