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The semantics and execution of a synchronous block-diagram language

机译:同步块图语言的语义和执行

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摘要

We present a new block diagram language for describing synchronous software. It coordinates the execution of synchronous, concurrent software modules, allowing real-time systems to be assembled from precompiled blocks specified in other languages. The semantics we present, based on fixed points, is deterministic even in the presence of instantaneous feedback. The execution policy develops a static schedule―a fixed order in which to execute the blocks that makes the system execution predictable. We present exact and heuristic algorithms for finding schedules that minimize system execution time, and show that good schedules can be found quickly. The scheduling algorithms are applicable to other problems where large systems of equations need to be solved.
机译:我们提供了一种用于描述同步软件的新框图语言。它协调同步,并发软件模块的执行,从而允许使用其他语言指定的预编译块来组装实时系统。我们基于定点给出的语义即使在存在即时反馈的情况下也具有确定性。执行策略制定了一个静态时间表-一种固定顺序,在该顺序中可以执行使系统可预测的块执行。我们提出了精确而启发式的算法来查找可最大程度减少系统执行时间的计划,并表明可以快速找到良好的计划。该调度算法适用于其他需要解决大型方程组的问题。

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