Proceedings Real-Time Technology and Applications最新文献_第3页

A flexible tool kit for the development of real-time applications 用于开发实时应用程序的灵活工具包

Proceedings Real-Time Technology and Applications Pub Date : 1996-06-10 DOI: 10.1109/RTTAS.1996.509543

P. Ancilotti, G. Buttazzo, M. Natale, M. Bizzarri

{"title":"A flexible tool kit for the development of real-time applications","authors":"P. Ancilotti, G. Buttazzo, M. Natale, M. Bizzarri","doi":"10.1109/RTTAS.1996.509543","DOIUrl":"https://doi.org/10.1109/RTTAS.1996.509543","url":null,"abstract":"When developing hard real time applications, one of the crucial aims of the designer(s) is to ensure a predictable time behaviour in all anticipated conditions. In particular, it would be highly desirable to verify the compliance of the application with its timing requirements in the early steps of the development, especially at the design stage; an early detection of performance bottlenecks, critical resource usage or critical timing paths is vital to properly design the allocation of the computing and the interactions among the program modules. The toolkit presented facilitates the development of complex hard real time applications and allows the user to describe the application requirements according to three hierarchical levels: the application level, the node level, and the task level. With respect to other approaches proposed in the literature (like PERTS (J.W.S. Lin et al., 1993) or IPTES (G. Leon et al., 1993)), our design cycle is based on an extended spiral metamodel in which the real time scheduling support is considered from the beginning of the design process. An advantage of this approach is to drastically reduce the number of trial and error iterations, by examining the non functional requirements of the applications in the early design phases.","PeriodicalId":324830,"journal":{"name":"Proceedings Real-Time Technology and Applications","volume":"158 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114947753","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: 4

A robotic assembly application on the Spring real-time system 一个基于Spring的机器人实时装配应用系统

Proceedings Real-Time Technology and Applications Pub Date : 1996-06-10 DOI: 10.1109/RTTAS.1996.509519

Carl Bickford, Marie S. Teo, G. Wallace, J. Stankovic, K. Ramamritham

{"title":"A robotic assembly application on the Spring real-time system","authors":"Carl Bickford, Marie S. Teo, G. Wallace, J. Stankovic, K. Ramamritham","doi":"10.1109/RTTAS.1996.509519","DOIUrl":"https://doi.org/10.1109/RTTAS.1996.509519","url":null,"abstract":"The Spring real-time system and environment provides methods for program representation and corresponding run-time system support that allow programs to meet the predictability demands of complex real-time applications. The primary objective of the work described in this paper is to present the experiences gained and the lessons learned from porting a real-world, real-time application to make it predictable and flexible. The exercise has also provided a test case which helps to answer questions about the completeness and ease of use of software development tools that have been developed to provide for flexibility while achieving real-time guarantees. This test case is derived from an existing real-time application in industry-a robotic work-cell that is currently in use for the assembly of circuit boards. From our experience with this reengineering exercise, we believe that a user must possess a good understanding of the following: (1) the general properties of the target hardware-for effective process and resource layout, and (2) the shared resource usage and interprocess communication, and, more generally, the statements that cause processes to suspend-for efficient run-time representation of the tasks. Tools that help the user obtain this understanding and perform detailed timing analysis are essential. Although the algorithms and tools used in the reimplementation were developed in the context of the Spring real-time environment, we believe that the lessons learned from this experiment will be useful not only to potential users of Spring, but also to real-time practitioners at large.","PeriodicalId":324830,"journal":{"name":"Proceedings Real-Time Technology and Applications","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116125165","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: 5

Predictable communication protocol processing in real-time Mach 可预测的实时Mach通信协议处理

Proceedings Real-Time Technology and Applications Pub Date : 1996-06-10 DOI: 10.1109/RTTAS.1996.509539

Chen Lee, Katsuhiko Yoshida, C. W. Mercer, R. Rajkumar

{"title":"Predictable communication protocol processing in real-time Mach","authors":"Chen Lee, Katsuhiko Yoshida, C. W. Mercer, R. Rajkumar","doi":"10.1109/RTTAS.1996.509539","DOIUrl":"https://doi.org/10.1109/RTTAS.1996.509539","url":null,"abstract":"Scheduling of many different kinds of activities takes place in distributed real time and multimedia systems. It includes scheduling of computations, window services, filesystem management, I/O services and communication protocol processing. We investigate the problem of scheduling communication protocol processing in real time systems. Communication protocol processing takes a relatively substantial amount of time and if not structured correctly, unpredictable priority inversion and undesirable timing behavior can result to applications communicating with other processors but are otherwise scheduled correctly. We describe the protocol processing architecture in the RT-Mach operating system, which allows the timing of protocol processing to be under strict application control. An added benefit is also obtained in the form of higher performance. This scheduling architecture is consistent with the: other RT-Mach scheduling mechanisms including fixed priority scheduling and processor reservation. The benefits of this protocol architecture are demonstrated both under synthetic workloads and in a realistic distributed videoconferencing system we have implemented in RT-Mach. End to end delays for both audio and video are as predicted even with other threads competing for the CPU and the network.","PeriodicalId":324830,"journal":{"name":"Proceedings Real-Time Technology and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1996-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128565411","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: 66

RTCAST: lightweight multicast for real-time process groups RTCAST:用于实时进程组的轻量级多播

Proceedings Real-Time Technology and Applications Pub Date : 1996-06-10 DOI: 10.1109/RTTAS.1996.509542

T. Abdelzaher, A. Shaikh, F. Jahanian, K. Shin

引用次数: 70

A semantic-based concurrency control protocol for real-time transactions 用于实时事务的基于语义的并发控制协议

Proceedings Real-Time Technology and Applications Pub Date : 1996-06-10 DOI: 10.1109/RTTAS.1996.509523

Ching-Shan Peng, Kwei-Jay Lin

引用次数: 28

AIDA-based real-time fault-tolerant broadcast disks 基于aida的实时容错广播磁盘

Proceedings Real-Time Technology and Applications Pub Date : 1996-01-05 DOI: 10.1109/RTTAS.1996.509522

Azer Bestavros

引用次数: 73