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DSRT
2008
IEEE

Lightweight Time Warp - A Novel Protocol for Parallel Optimistic Simulation of Large-Scale DEVS and Cell-DEVS Models

13 years 5 months ago
Lightweight Time Warp - A Novel Protocol for Parallel Optimistic Simulation of Large-Scale DEVS and Cell-DEVS Models
This paper proposes a novel Lightweight Time Warp (LTW) protocol for high-performance parallel optimistic simulation of large-scale DEVS and CellDEVS models. By exploiting the characteristics of the simulation process, the protocol is able to set free most logical processes (LPs) from the Time Warp mechanism, while the overall simulation still executes optimistically, driven by only a few full-fledged Time Warp LPs. The LTW protocol includes a rule-based event-scheduling mechanism using two types of event queues, an aggregated state-saving technique for optimal risk-free state management, and a new rollback algorithm that recovers lightweight LPs from causality errors without sending anti-messages. The impact on global control mechanisms such as GVT computation, fossil collection, and load migration is also discussed. The basic concepts of the protocol could also apply to a broad range of Time Warp systems under certain conditions and with appropriate control over the LPs.
Qi Liu, Gabriel A. Wainer
Added 19 Oct 2010
Updated 19 Oct 2010
Type Conference
Year 2008
Where DSRT
Authors Qi Liu, Gabriel A. Wainer
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