Virtual synchronization technique with OS modeling for fast and time-accurate cosimulation
Virtual synchronization technique with OS modeling for fast and time-accurate cosimulation
复制标题
具有操作系统建模的虚拟同步技术，可实现快速且时间准确的协同仿真
DOI：
10.1145/944645.944647
复制
发表时间：
2003
期刊：
影响因子：
--
通讯作者：
S. Ha
中科院分区：
文献类型：
--
作者：
Youngmin Yi;Dohyung Kim;S. Ha
硬件/软件协同仿真是缩短设计周期的关键环节。我们提出了一种新的技术，称为虚拟同步，用于涉及交互组件模拟器的快速和时间精确的协同仿真。我们通过操作系统建模进一步扩展了虚拟同步技术，以适应在实时操作系统的监督下执行多个软件任务的情况。操作系统建模师对上下文切换、tick中断处理以及抢占行为的RTOS开销进行建模。在将定时精度保持在几个百分点以下的可接受水平的同时，我们可以通过消除模拟器之间的时间同步需求，与现有的保守方法相比，大大减少仿真时间。通过一个由四个实际任务组成的多媒体实例进行了初步实验。
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 interacting component simulators. 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 percent, we could reduce the simulation time drastically compared with existing conservative approach by removing the need of time synchronization between simulators. It is confirmed with a preliminary experiment with a multimedia example that consists of four real-life tasks.