Proceedings Real-Time Technology and Applications Symposium最新文献

The real-time publisher/subscriber inter-process communication model for distributed real-time systems: design and implementation 分布式实时系统的实时发布者/订阅者进程间通信模型:设计与实现

Proceedings Real-Time Technology and Applications Symposium Pub Date : 1995-05-15 DOI: 10.1109/RTTAS.1995.516203

R. Rajkumar, M. Gagliardi, L. Sha

{"title":"The real-time publisher/subscriber inter-process communication model for distributed real-time systems: design and implementation","authors":"R. Rajkumar, M. Gagliardi, L. Sha","doi":"10.1109/RTTAS.1995.516203","DOIUrl":"https://doi.org/10.1109/RTTAS.1995.516203","url":null,"abstract":"Distributed real-time systems are becoming more pervasive in many domains including process control, discrete manufacturing, defense systems, air traffic control, and online monitoring systems in medicine. The construction of such systems, however, is impeded by the lack of simple yet powerful programming models and the lack of efficient, scalable, dependable and analyzable interfaces and their implementations. We argue that these issues need to be resolved with powerful application-level toolkits similar to that provided by ISIS. We consider the inter-process communication requirements which form a fundamental block in the construction of distributed real-time systems. We propose the real-time publisher/subscriber model, a variation of group-based programming and anonymous communication techniques, as a model for distributed real-time inter-process communication which can address issues of programming ease, portability, scalability and analyzability. The model has been used successfully in building a software architecture for building upgradable real-time systems. We provide the programming interface, a detailed design and implementation details of this model along with some preliminary performance benchmarks. The results are encouraging in that the goals we seek look achievable.","PeriodicalId":265113,"journal":{"name":"Proceedings Real-Time Technology and Applications Symposium","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114394443","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 186

A real-time system description language 一种实时系统描述语言

Proceedings Real-Time Technology and Applications Symposium Pub Date : 1995-05-15 DOI: 10.1109/RTTAS.1995.516207

D. Niehaus, J. Stankovic, K. Ramamritham

引用次数: 19

A modeling methodology for real-time/multimedia operating systems 实时/多媒体操作系统的建模方法

Proceedings Real-Time Technology and Applications Symposium Pub Date : 1995-05-15 DOI: 10.1109/RTTAS.1995.516190

Kevin A. Kettler, Daniel I. Katcher, J. Strosnider

引用次数: 17

An interactive interface and RT-Mach support for monitoring and controlling resource management 用于监视和控制资源管理的交互式界面和RT-Mach支持

Proceedings Real-Time Technology and Applications Symposium Pub Date : 1995-05-15 DOI: 10.1109/RTTAS.1995.516210

C. W. Mercer, R. Rajkumar

引用次数: 36

Multimedia applications on FDDI networks connected by an ATM switch 通过ATM交换机连接的FDDI网络上的多媒体应用

Proceedings Real-Time Technology and Applications Symposium Pub Date : 1995-05-15 DOI: 10.1109/RTTAS.1995.516202

J. Ng, Ge Nong

引用次数: 1

A low level analysis of the realtime Mach distributed operating system 实时Mach分布式操作系统的底层分析

Proceedings Real-Time Technology and Applications Symposium Pub Date : 1995-05-15 DOI: 10.1109/RTTAS.1995.516195

J. Drummond, Michael Wu

{"title":"A low level analysis of the realtime Mach distributed operating system","authors":"J. Drummond, Michael Wu","doi":"10.1109/RTTAS.1995.516195","DOIUrl":"https://doi.org/10.1109/RTTAS.1995.516195","url":null,"abstract":"The use of measuring techniques to assist in the process of evaluation has always been a speculative endeavor. There is the presence of doubt as to what should be measured, and once this measurable entity has been determined, then what constitutes proper measurement of the entity itself. Current work in the real-time operating system software development arena presents us with this same enigma (how to, and what should be measured). The domain we have been pursuing to this end is a segmented appraisal consisting of analyzing specific elements which are properties of real-time operating systems. Six candidate elements of primary importance in the evaluation of real-time operating systems have been suggested and interpreted by the Rhealstone benchmark (Kar, 1989, 1990). These elements include: task switch time, preemption time, interrupt latency time, semaphore shuffling time, deadlock breaking time and interprocess communication latency time. We have researched these elements in relation to the Real-Time Mach Operating System and present the results of our findings. To minimize the variation on the end results, this appraisal was conducted under a specifically conditioned environment and we acknowledge the limitations of the results as such.","PeriodicalId":265113,"journal":{"name":"Proceedings Real-Time Technology and Applications Symposium","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126291576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Real-time communications scheduling for massively parallel processors 大规模并行处理器的实时通信调度

Proceedings Real-Time Technology and Applications Symposium Pub Date : 1995-05-15 DOI: 10.1109/RTTAS.1995.516204

R. Games, A. Kanevsky, P. Krupp, L. Monk

{"title":"Real-time communications scheduling for massively parallel processors","authors":"R. Games, A. Kanevsky, P. Krupp, L. Monk","doi":"10.1109/RTTAS.1995.516204","DOIUrl":"https://doi.org/10.1109/RTTAS.1995.516204","url":null,"abstract":"Can general purpose commercial massively parallel processors (MPPs) be used for computationally intensive real-time applications that have traditionally required a custom arrangement of special-purpose computers and mainframes? If so, then the enormous lifecycle costs of many systems needed by, for instance, the Government could potentially be reduced. The components would be commercially available and continuing technological advances could more easily be incorporated into existing systems. Relevant applications have requirements not found in large-scale scientific computing, which has up to now provided most of the motivation for the development of MPPs. Perhaps the most important difference is the need for real-time processing. Depending on the application, multi-level security, fault tolerance and other features may also be necessary. There have already been hardware advances that may make such a high performance computing solution possible. However, daunting software challenges remain. We focus on one critical problem, the real-time scheduling of the communications between processing nodes. We discuss real-time MPP application benchmarks.","PeriodicalId":265113,"journal":{"name":"Proceedings Real-Time Technology and Applications Symposium","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116021338","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

Real-time optimization at diamond interchanges 菱形交汇处的实时优化

Proceedings Real-Time Technology and Applications Symposium Pub Date : 1995-05-15 DOI: 10.1109/RTTAS.1995.516222

S. Venglar, T. Urbanik, Jyh-Charn S. Liu

引用次数: 3

Probabilistic performance guarantee for real-time tasks with varying computation times 随计算时间变化的实时任务的概率性能保证

Proceedings Real-Time Technology and Applications Symposium Pub Date : 1995-05-15 DOI: 10.1109/RTTAS.1995.516213

Too-Seng Tia, Z. Deng, M. Shankar, M. Storch, Jun Sun, L.-C. Wu, J. Liu

{"title":"Probabilistic performance guarantee for real-time tasks with varying computation times","authors":"Too-Seng Tia, Z. Deng, M. Shankar, M. Storch, Jun Sun, L.-C. Wu, J. Liu","doi":"10.1109/RTTAS.1995.516213","DOIUrl":"https://doi.org/10.1109/RTTAS.1995.516213","url":null,"abstract":"Describes how the scheduling algorithms and schedulability analysis methods developed for periodic tasks can be extended to provide performance guarantees to semi-periodic tasks. Like periodic tasks, the requests in a semi-periodic task are released regularly. However, their computation times vary widely. We focus on systems where the total maximum utilization of the tasks on each processor is larger than one. Hence, according to the existing schedulability conditions for periodic tasks, we cannot guarantee that the semi-periodic tasks are schedulable, even though their total average utilization is very small. We describe two methods of providing probabilistic schedulability guarantees to the semi-periodic tasks. The first method, called probabilistic time-demand analysis, is a modification of the exact schedulability test for periodic tasks. The second method, called the transform-task method, transforms each task into a periodic task followed by a sporadic task. The transform-task method can provide an absolute guarantee to requests with shorter computation times and a probabilistic guarantee to the longer requests.","PeriodicalId":265113,"journal":{"name":"Proceedings Real-Time Technology and Applications Symposium","volume":"03 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127191810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 254

ControlShell: component-based real-time programming ControlShell:基于组件的实时编程

Proceedings Real-Time Technology and Applications Symposium Pub Date : 1995-05-15 DOI: 10.1109/RTTAS.1995.516199

Stanley A. Schneider, V. W. Chen, G. Pardo-Castellote

引用次数: 54