1998 Winter Simulation Conference. Proceedings (Cat. No.98CH36274)
DOI: 10.1109/wsc.1998.746030
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Unsynchronized parallel discrete event simulation

Abstract: Distributed synchronization for parallel simulation is generally classified as being either optimistic or conservative. While considerable investigations have been conducted to analyze and optimize each of these synchronization strategies, very little study on the definition and strictness of causality have been conducted. Do we really need to preserve causality in all types of simulations? This paper attempts to answer this question. We argue that significant performance gains can be made by reconsidering thi… Show more

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Cited by 33 publications
(21 citation statements)
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References 13 publications
(17 reference statements)
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“…Some researchers (Sokol [13], Rao [14]) just ignored the sequential relationship of events, which may result in abnormal causal logic and is not suitable for analysis simulation. Some researchers (Fujimoto [15], Beraldi [16]) took time interval as a substitute for precise time stamp, and took full advantage of uncertainty about time information to improve the performance of time management.…”
Section: Research Statusmentioning
confidence: 99%
“…Some researchers (Sokol [13], Rao [14]) just ignored the sequential relationship of events, which may result in abnormal causal logic and is not suitable for analysis simulation. Some researchers (Fujimoto [15], Beraldi [16]) took time interval as a substitute for precise time stamp, and took full advantage of uncertainty about time information to improve the performance of time management.…”
Section: Research Statusmentioning
confidence: 99%
“…as might occur when congestion arises due to an accident in an ad hoc traffic simulation. A form of relaxed consistency is used [20]. Specifically, timestamp intervals are used to specify the temporal validity of data values, not unlike those used by Fujimoto [21].…”
Section: Related Workmentioning
confidence: 99%
“…Existe ainda uma abordagem que visa minimizar as sobrecargas impostas pela sincronização, adotando um comportamento denominado anarquista ou assíncrono (Rao et al, 1998;Thondugulam et al, 1999;Dota, 2001): os erros de causa e efeito simplesmente são ignorados. A execução da simulação é feita mais rapidamente, porém seus resultados são aproximados.…”
Section: Simulação Distribuídaunclassified
“…de deadlocks e cálculo do lookahead em simulação distribuída e a ocorrência de rollbacks, gravação de variáveis de estado e cálculo do GVT nos protocolos otimistas (Rao et al, 1998: Thondugulam et al 1999). …”
Section: Protocolo Assíncronounclassified