Modeling communication software execution for accurate simulation of distributed systems

Kristiansen, Stein; Plagemann, Thomas; Goebel, Vera

doi:10.1145/2486092.2486102

Cited by 4 publications

(3 citation statements)

References 20 publications

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“…Delays which are caused by the target hardware are neglected, which is a limitation of our current implementation. We regard the modeling of hardwareintroduced delays as future work which can be approached by instrumenting and tracing execution on real hardware platforms once they are available in the development process [10].…”

Section: Discussionmentioning

confidence: 99%

Emulating Vehicular Ad hoc Networks for Evaluation and Testing of Automotive Embedded Systems

Schiller¹,

Knoll²

2015

Proceedings of the Eighth EAI International Conference on Simulation Tools and Techniques

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The evaluation and testing of cooperative applications based on Vehicular Ad hoc Networks (VANETs) in real testbeds is difficult due to the need for repeatable scenarios and largescale experiments. Therefore a novel virtualization-based framework is presented to evaluate automotive software in the context of emulated VANETs. The approach enables the precise and large-scale evaluation of real-world implementations through the synchronized execution of network and vehicle simulators as well as the applications encapsulated in virtual Electronic Control Units. This paper provides a detailed description of the framework's structure and its components as well as an validation of the proposed synchronization algorithm. The performance comparison with pure network simulation indicates that despite additional overhead large-scale experiments can be conducted without loss of accuracy.

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Section: Discussionmentioning

confidence: 99%

Emulating Vehicular Ad hoc Networks for Evaluation and Testing of Automotive Embedded Systems

Schiller¹,

Knoll²

2015

Proceedings of the Eighth EAI International Conference on Simulation Tools and Techniques

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“…Thus, they optimized the configuration of a multi-core Click router during its runtime by duplication of dedicated bottleneck tasks. Kristiansen et al [40] proposed a node model for considering the packet processing overhead resulting from software. However, this model does not consider multi-core architectures.…”

Section: Related Workmentioning

confidence: 99%

Towards Low Latency Software Routers

Runge¹,

Raumer²,

Wohlfart³

et al. 2015

JNW

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Network devices based on commodity hardware are capable of high-speed packet processing while maintaining the programmability and extensibility of software. Thus, software-based network devices, like software routers, software-based firewalls, or monitoring systems, constitute a cost-efficient and flexible alternative to expensive, special purpose hardware. The overall packet processing performance in resource-constrained nodes can be strongly increased through parallel processing based on off-theshelf multi-core processors. However, synchronization and coordination of parallel processing may counteract the corresponding network node performance. We describe how multi-core software routers can be optimized for real-time traffic by utilizing the technologies available in commodity hardware. Furthermore, we propose a low latency extension for the Linux NAPI. For the analysis, we use our approach for modeling resource contention in resource-constrained nodes which is also implemented as a resource-management extension module for ns-3. Based on that, we derive a QoSaware software router model which we use to evaluate our performance optimizations. Our case study shows that the different scheduling strategies of a software router have significant influence on the performance of handling realtime traffic.

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“…The work in [32] proposes a methodology to capture processing delay models from communication software running on real devices.…”

Section: Consideration Of Network Node's Processing Delaymentioning

confidence: 99%

Integrated simulation and emulation using adaptive time dilation

Lee

Thuente

Sichitiu

2014

Proceedings of the 2nd ACM SIGSIM Conference on Principles of Advanced Discrete Simulation

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Simulation and emulation techniques are commonly used to evaluate the performance of complex networked systems. Simulation conveniently predicts the behavior of a complex networked system while usually requiring fewer simplifying model assumptions often necessary for theoretical analysis. In contrast, emulation does not need to re-implement the target real systems, so it may improve on the implementation efficiency of simulation while maintaining much of the realism of testbeds. A hybrid approach in which simulation nodes connect to emulation hosts can be used to combine the advantages of both approaches. In this paper, we propose integrating simulation with emulation using adaptive time dilation to evaluate system performance. If a simulator schedules its events in real time and the simulation time keeps up with the real time, then the hybrid system works very well and meets its deadlines. However, a heavily-loaded simulator can introduce significant simulation delays and thereby create situations where these delays impact the accuracy of the system. Our approach uses time dilation to reduce simulation delays and thus increasing the accuracy of the integrated simulation and emulation system. Our adaptive time dilation dynamically controls the time dilation factor to avoid system overloads for both the simulation and the emulation components and to improve the execution correctness of the hybrid system.

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Modeling communication software execution for accurate simulation of distributed systems

Cited by 4 publications

References 20 publications

Emulating Vehicular Ad hoc Networks for Evaluation and Testing of Automotive Embedded Systems

Emulating Vehicular Ad hoc Networks for Evaluation and Testing of Automotive Embedded Systems

Towards Low Latency Software Routers

Integrated simulation and emulation using adaptive time dilation

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