Conjoining Emulation and Network Simulators on Linux Multiprocessors

Conjoinment of emulation and simulation in virtual time requires that emulated execution bursts be ascribed a duration in virtual time, and that emulated execution and simulation executions be coordinated within this common virtual time basis. This paper shows how an open source tool TimeKeeper for coordinating emulations in virtual time can be integrated with three different existing software emulations/simulations: CORE, ns-3, and S3F. We describe for each of these the modifications made to the tools to support this integration, and examine experiments designed to assess the accuracy of the combined models. Timekeeper permits much tighter sychronization emulation and simulation than has ever been achieved before.