{"title":"Virtual Time III, Part 2: Combining Conservative and Optimistic Synchronization","authors":"David R. Jefferson, Peter D. Barnes","doi":"https://dl.acm.org/doi/10.1145/3505249","DOIUrl":null,"url":null,"abstract":"<p>This is <i>Part 2</i> of a trio of works intended to provide a unifying framework in which conservative and optimistic synchronization for parallel discrete event simulations can be freely and transparently combined in the same logical process on an event-by-event basis. In this article, we continue the outline of an approach called <i>Unified Virtual Time</i> (UVT) that was introduced in <i>Part 1</i>, showing in detail via two extended examples how conservative synchronization can be refactored and combined with optimistic synchronization in the UVT framework. We describe UVT versions of both a basic time windowing algorithm called <i>Unified Simple Time Windows</i> and a refactored version of the Chandy-Misra-Bryant Null Message algorithm called <i>Unified CMB</i>.</p>","PeriodicalId":50943,"journal":{"name":"ACM Transactions on Modeling and Computer Simulation","volume":null,"pages":null},"PeriodicalIF":0.7000,"publicationDate":"2023-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"ACM Transactions on Modeling and Computer Simulation","FirstCategoryId":"94","ListUrlMain":"https://doi.org/https://dl.acm.org/doi/10.1145/3505249","RegionNum":4,"RegionCategory":"计算机科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}
引用次数: 0
Abstract
This is Part 2 of a trio of works intended to provide a unifying framework in which conservative and optimistic synchronization for parallel discrete event simulations can be freely and transparently combined in the same logical process on an event-by-event basis. In this article, we continue the outline of an approach called Unified Virtual Time (UVT) that was introduced in Part 1, showing in detail via two extended examples how conservative synchronization can be refactored and combined with optimistic synchronization in the UVT framework. We describe UVT versions of both a basic time windowing algorithm called Unified Simple Time Windows and a refactored version of the Chandy-Misra-Bryant Null Message algorithm called Unified CMB.
这是旨在提供一个统一框架的三部作品的第2部分，在这个框架中，并行离散事件模拟的保守和乐观同步可以在一个事件接一个事件的基础上自由透明地结合在相同的逻辑过程中。在本文中，我们将继续概述第1部分中介绍的一种称为统一虚拟时间(Unified Virtual Time, UVT)的方法，通过两个扩展示例详细展示如何重构保守同步，并将其与UVT框架中的乐观同步结合起来。我们描述了称为统一简单时间窗口的基本时间窗算法和称为统一CMB的Chandy-Misra-Bryant空消息算法的重构版本的UVT版本。
期刊介绍：
The ACM Transactions on Modeling and Computer Simulation (TOMACS) provides a single archival source for the publication of high-quality research and developmental results referring to all phases of the modeling and simulation life cycle. The subjects of emphasis are discrete event simulation, combined discrete and continuous simulation, as well as Monte Carlo methods.
The use of simulation techniques is pervasive, extending to virtually all the sciences. TOMACS serves to enhance the understanding, improve the practice, and increase the utilization of computer simulation. Submissions should contribute to the realization of these objectives, and papers treating applications should stress their contributions vis-á-vis these objectives.
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