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Real-time systems performance in the presence of failures

J.K. Muppala, S.P. Woolet, K.S. Trivedi
1991 Computer  
he growing use of real-time systems in such diverse areas as transaction processing, air-traffic control, process control, and mission-critical control has created a need for effective This unified methodology  ...  Tramostly on mean values of the measures, When analyzing a transaction process-systems uses techniques that combine the effects of performance, ditional analysis techniques, which rely cannot capture all  ...  As expected, the system with soft deadlines outperforms the system with hard deadlines, since a hard-deadline violation is catastrophic.  ... 
doi:10.1109/2.76285 fatcat:ge5e7mbqqzenbgtfveptawdwfi

Embedded Real-Time HTTP Server

Radosław Czarnecki, Stanislaw Deniziak
2015 International Journal of Computer Network and Information Security  
The presented server may be very useful for implementing real-time services supported by embedded systems, e.g. in future real-time -Internet of things‖ applications.  ...  Unlike existing web servers, in our approach, requests are processed not in the -first in first out‖ order but according to their deadlines and the expected server load.  ...  EWS are used for controlling network printers, wireless routers, network cameras and other devices or sensors.  ... 
doi:10.5815/ijcnis.2015.05.01 fatcat:ytukech2gvdzzipg644p7lfmfe

Providing Real-Time Applications With Graceful Degradation of QoS and Fault Tolerance According to$(m, k)$-Firm Model

J. Li, Y. Song, F. Simonot-Lion
2006 IEEE Transactions on Industrial Informatics  
and on the other hand, the implementation of real-time QoS mechanisms in fieldbuses, in-vehicle networks, switched Ethernet, IP networks, and power line communication networks.  ...  His research interests include, on the one hand, the modeling and performance evaluation of networks and real-time distributed systems using queueing analysis, network calculus, and scheduling theory,  ...  (e.g., Internet-based control systems, remote control, and monitoring systems based on Internet and power line networks, such as what has been proposed in the REMPLI project; see  ... 
doi:10.1109/tii.2006.875511 fatcat:5x3maqu7rvh7bnt64fdcxfxsym

Going Beyond Deadline-Driven Low-level Scheduling in Distributed Real-Time Computing Systems [chapter]

K. H. Kim, Juqiang Liu
2002 IFIP Advances in Information and Communication Technology  
However, it does not reflect additional concerns of the application designer, the damaging impacts of various timing violations on the application.  ...  In real-time computing systems, timing-requirement specifications coming from the application designer are the obvious primary driver for resource allocation.  ...  CAMIN (Coordinated Anti-Missile Interceptor Network) is a model of a defense command-and-control network which has been used in the authors' laboratory as an example of an advanced RT distributed computing  ... 
doi:10.1007/978-0-387-35599-3_21 fatcat:j2vxuf36ifgsfjux6qedgkqd2q

Feedback-Based Admission Control for Hard Real-Time Task Allocation Under Dynamic Workload on Many-Core Systems [chapter]

Piotr Dziurzanski, Amit Kumar Singh, Leandro Soares Indrusiak
2016 Lecture Notes in Computer Science  
In case of a careful fine-tuning of parameters, the proposed approach can be successfully applied even to many-core embedded systems with hard real-time constraints and other time-critical systems.  ...  The provided experimental results demonstrate that, on average, only 62% of the schedulability tests have to be performed in comparison with the traditional, open-loop approach.  ...  The research leading to these results has received funding from the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 611411.  ... 
doi:10.1007/978-3-319-30695-7_12 fatcat:cz4ekzvgvfakhgidwwimcyvi54

Cross-Layer Design of Automotive Systems [article]

Zhilu Wang, Hengyi Liang, Chao Huang, Qi Zhu
2020 arXiv   pre-print
; and then presents a new methodology based on the weakly-hard paradigm for leveraging the scheduling flexibility in architecture layer to improve the system performance at function layer.  ...  This paper first introduces several cross-layer approaches we developed in the past for holistically addressing multiple system layers in the design of individual vehicles and of connected vehicle applications  ...  ACKNOWLEDGMENT The authors gratefully acknowledge the support from the National Science Foundation grants 1834701, 1834324, and 1839511, and the Office of Naval Research grant N00014-19-1-2496.  ... 
arXiv:2005.11842v2 fatcat:zakiwx4pzfhmph732qcro6f6cq

On the Benefits of Relaxing the Periodicity Assumption for Networked Control Systems over CAN

Adolfo Anta, Paulo Tabuada
2009 2009 30th IEEE Real-Time Systems Symposium  
The case of control loops closed over Controller Area Networks (CAN) is discussed in detail and illustrated on a train car.  ...  A vast majority of control systems require the use of networks for the communication between the different agents: sensors, controllers, and actuators.  ...  One of the most common assumptions for networked control systems consists in the periodic execution of the control algorithm.  ... 
doi:10.1109/rtss.2009.39 dblp:conf/rtss/MartinezT09 fatcat:zfvhyqq5u5c2dgabvkopynm57e

Research On Weakly Hard Real-Time Constraints And Their Boolean Combination To Support Adaptive Qos

Xiangbin Zhu
2009 Zenodo  
The fact that a practical application can tolerate some violations of temporal constraint under certain distribution is employed to support adaptive QoS on the open real-time system.  ...  Moreover, in practical applications, partly violated temporal constraints can be tolerated if the violation meets certain distribution.  ...  Weakly hard real-time systems is one of the task models proposed in recent years for scheduling periodic real-time tasks where partly violated temporal constraints can be tolerated if the violation meets  ... 
doi:10.5281/zenodo.1062111 fatcat:6o7rsqxmgvaavlrpkhlxeg6ta4

Hard real-time guarantee of automotive applications during mode changes

Piotr Dziurzanski, Amit Kumar Singh, Leandro Soares Indrusiak, Björn Saballus
2015 Proceedings of the 23rd International Conference on Real Time and Networks Systems - RTNS '15  
Thanks to the modal nature of these systems, it is possible to decrease the number of active cores consuming high power in certain modes, leading to considerable energy savings while still not violating  ...  This paper presents a resource allocation approach that benefits from modal nature of hard-real time systems under consideration. The modal nature determines the operational modes of the systems.  ...  Acknowledgement The research leading to these results has received funding from the European Union's Seventh Framework Programme (FP7/2007-2013) under grant agreement no. 611411.  ... 
doi:10.1145/2834848.2834859 dblp:conf/rtns/DziurzanskiSIS15 fatcat:okqbgiv4pbgb5cnjl6awgenlsq

qPALS: Quality-Aware Synchrony Protocol for Distributed Real-Time Systems

2014 KSII Transactions on Internet and Information Systems  
However, their application to real systems has been limited since their assumptions on underlying systems are hard to satisfy.  ...  In qPALS, the Quality-of-Service (QoS) on synchronization and consistency is specified in a probabilistic manner, and the specified QoS is supported under dynamic and unpredictable network environments  ...  One of the major challenges of such distributed systems lies in the complexity resulting from the asynchronous exchanges of data and control messages.  ... 
doi:10.3837/tiis.2014.10.004 fatcat:jun3gbqihffxfoe6mfnpq6ia34

Centralized vs distributed communication scheme on Switched Ethernet for embedded military applications

Ahlem Mifdaoui, Fabrice Frances, Christian Fraboul
2009 2009 IEEE International Symposium on Industrial Embedded Systems  
Therefore, a new interconnection system is needed to overcome these limitations. Two new communication networks based upon Full Duplex Switched Ethernet are presented herein in this aim.  ...  The paper includes the functional description of each proposed communication network and a military avionic application to highlight proposals ability to support the required time constrained communications  ...  Clearly, one can see that for terminals SXJJ and RS end-to-end delay bounds are larger than 3 ms which means that the deadline constraint for the Hard Real Time aperiodic messages is violated.  ... 
doi:10.1109/sies.2009.5196216 dblp:conf/sies/MifdaouiFF09 fatcat:23uhbezlfnaknakbvvylxzg7we

Machine ballets don't need conductors: Towards scheduling-based service choreographies in a real-time SOA for industrial automation

Thomas Kothmayr, Alfons Kemper, Andreas Scholz, Jorg Heuer
2014 Proceedings of the 2014 IEEE Emerging Technology and Factory Automation (ETFA)  
One approach to achieve this goal is the shift from centralized control systems towards distributed, service-oriented architectures (SOA).  ...  In this paper, we present our approach for a lightweight distributed service choreography without a central point of control.  ...  are checked for deadline violations.  ... 
doi:10.1109/etfa.2014.7005260 dblp:conf/etfa/KothmayrKSH14 fatcat:lauowh7tergubfz6gjn3ar4edu

Schedulability analysis of AR-TP, a Ravenscar compliant communication protocol for high-integrity distributed systems

S. Uruena, J. Zamorano, D. Berjon, J.A. Pulido, J.A. de la Puente
2006 Proceedings 20th IEEE International Parallel & Distributed Processing Symposium  
This protocol allows the schedulability analysis of the network, enabling the use of standard Ethernet hardware for Hard Real-Time behavior while adding congestion management.  ...  A new token-passing algorithm called AR-TP for avoiding the non-determinism of some networking technologies is presented.  ...  Of course, the sender task of that message is informed when this happens. However, in the worst case, all the messages of a node can have violated their deadlines before being sent.  ... 
doi:10.1109/ipdps.2006.1639400 dblp:conf/ipps/UruenaZBPP06 fatcat:xxoqli74hrgrxiaj53ppwyciae


Hongryeol Kim, Joomin Kim, Daewon Kim
2005 IFAC Proceedings Volumes  
The modulation is performed based on the dynamical values of the behaviors running on an operating system in each node.  ...  A modulation strategy of the hard deadlines-rates is also proposed in this paper for the optimal usage of computational resource.  ...  The modulation is performed based on the dynamical values of the behaviors running on an operating system in each node.  ... 
doi:10.3182/20050703-6-cz-1902.01338 fatcat:ktlukoosmfbvdkyhfk7cdzg6em

Real-time computing: a new discipline of computer science and engineering

K.G. Shin, P. Ramanathan
1994 Proceedings of the IEEE  
This paper surveys the state of the art in real-time computing. It introduces basic concepts and identifies key issues in the design of real-time systems.  ...  Solutions proposed in literature for tackling these issues are also briejy discussed.  ...  tasks with hard deadlines on a uniprocessor system.  ... 
doi:10.1109/5.259423 fatcat:r6n5b64xqvg7ln2hc4aqupykwy
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