Design and implementation of shared memory and hybrid communication models for portico RTI

Download

index.pdf

Date

2014

Author

Özen, Serkan

Metadata

Show full item record

Item Usage Stats

189
views

286
downloads

As distributed simulations became a new trend in the simulation world by the end of 1990s, a need for standards that provide rules for intercommunication of complex simulation systems has appeared. High Level Architecture (HLA) has been proposed by the United States Department of Defense (DOD) and has become a widely-used standard for the intercommunication of distributed simulations. The software that implements the HLA standard is called run-time infrastructure (RTI). Various closed and open source RTIs exist for public and commercial use. Well-known and widely-used closed source RTIs use various types of communication models like TCP, UDP and shared memory in their implementation. Currently, Portico RTI has two main communication models which are Jgroups and Java Virtual Machine (JVM) models. JVM model provides federates with a shared-memory like environment whereas Jgroups provides a network based communication services to federates. JVM model does not provide a real shared-memory environment where federates run as separate processes. Federates have to be invoked as separate threads in JVM model. If one of federates crashes, then whole federation might crash as well. Moreover a separate wrapper class has to be written in order to invoke federates as separate threads. All of these reasons motivated us to develop a real shared-memory communication model for Portico RTI. In this thesis we also aim to make shared-memory model work in a hybrid manner with another communication model, Jgroups. We present the new model, and compare evaluation results with the Portico implementation.

Subject Keywords

Computer networks., Distributed shared memory., Software architecture., Computer architecture., Computer network architectures.

URI

http://etd.lib.metu.edu.tr/upload/12617879/index.pdf
https://hdl.handle.net/11511/24064

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Implementing KQML agent communication language for multiagent simulation architectures on HLA Göktürk, Erek; Polat, Faruk; Department of Computer Engineering (2003) Multiagent simulation is gaining popularity due to its intuitiveness and ability in coping with domain complexity. HLA, being a distributed simulation architecture standard, is a good candidate for implementing a multiagent simulation infrastructure on, provided that agent communication can be implemented. HLA, being a standard designed towards a wide coverage of simulation system architectures and styles, is not an easy system to master. In this thesis, an abstraction layer called the Federate Abstraction ...
Learning to Navigate Endoscopic Capsule Robots Turan, Mehmet; Almalioglu, Yasin; Gilbert, Hunter B.; Mahmood, Faisal; Durr, Nicholas J.; Araujo, Helder; Sari, Alp Eren; Ajay, Anurag; Sitti, Metin (Institute of Electrical and Electronics Engineers (IEEE), 2019-07-01) Deep reinforcement learning (DRL) techniques have been successful in several domains, such as physical simulations, computer games, and simulated robotic tasks, yet the transfer of these successful learning concepts from simulations into the real world scenarios remains still a challenge. In this letter, a DRL approach is proposed to learn the continuous control of a magnetically actuated soft capsule endoscope (MASCE). Proposed controller approach can alleviate the need for tedious modeling of complex and ...
Schedulability analysis of real-time multiframe cosimulations on multicore platforms Ahsan, Muhammad Uzair; Oğuztüzün, Mehmet Halit S. (The Scientific and Technological Research Council of Turkey, 2019-01-01) For real-time simulations, the fidelity of simulation depends not only on the functional accuracy of simulation but also on its timeliness. It is helpful for simulation designers if they can analyze and verify that a simulation will always meet its timing requirements without unnecessarily sacrificing functional accuracy. Abstracting the simulated processes simply as software tasks allows us to transform the problem of verifying timeliness into a schedulability analysis problem where tasks are checked as to...
Functional mockup unit adaptation for HLA-compliant distributed simulation Yılmaz, Faruk; Oğuztüzün, Mehmet Halit S.; Durak, Umut; Department of Computer Engineering (2014) Conceptual design of systems require aggregate level simulations of the designed system in its operational setting. Thus, performance of the system and its interactions with the other entities in its environment can be evaluated. The complex and heterogeneous nature of these simulations often requires distributed execution. IEEE 1516 High Level Architecture (HLA) is a widely accepted standard architecture for distributed aggregate level simulations. Functional Mock-up Interface (FMI) is a recent standardiza...
Modelling and predicting binding affinity of PCP-like compounds using machine learning methods Erdaş, Özlem; Alpaslan, Ferda Nur; Department of Computer Engineering (2007) Machine learning methods have been promising tools in science and engineering fields. The use of these methods in chemistry and drug design has advanced after 1990s. In this study, molecular electrostatic potential (MEP) surfaces of PCP-like compounds are modelled and visualized in order to extract features which will be used in predicting binding affinity. In modelling, Cartesian coordinates of MEP surface points are mapped onto a spherical self-organizing map. Resulting maps are visualized by using values...

Citation Formats

S. Özen, “Design and implementation of shared memory and hybrid communication models for portico RTI,” M.S. - Master of Science, Middle East Technical University, 2014.