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20th Workshop on Principles of Advanced and Distributed Simulation (PADS'06) (2006)
May 24, 2006 to May 26, 2006
ISSN: 1087-4097
ISBN: 0-7695-2587-3
pp: 19-28
Craig Bergstrom , Virginia Tech, USA
Srinidhi Varadarajan , Virginia Tech, USA
Godmar Back , Virginia Tech, USA
In this paper, we present the design and implementation of The Distributed Open Network Emulator (dONE), a scalable hybrid network emulation/simulation environment. It has several novel contributions. First, a new model of time called relativistic time that combines the controllability of virtual time with the naturally flowing characteristics of wall-clock time. This enables a hybrid environment in which direct code execution can be mixed with simulation models. Second, dONE uses a new transparent object based framework called Weaves, which enables the composition of unmodified network applications and protocol stacks to create large-scale simulations. Finally, it implements a novel parallelization strategy that minimizes the number of independent timelines and offers an efficient mechanism to progress the event timeline. Our prototype implementation incorporates the complete TCP/IP stack from the Linux 2.4 kernel family and executes any application code written for the BSD sockets interface. The prototype runs on 16 processors and produces super-linear speedup in a simulation of hundred infinite-source to infinite-sink pairs.

C. Bergstrom, S. Varadarajan and G. Back, "The Distributed Open Network Emulator: Using Relativistic Time for Distributed Scalable Simulation," 20th Workshop on Principles of Advanced and Distributed Simulation (PADS'06)(PADS), Singapore, 2006, pp. 19-28.
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