发布求助
文献互助 智能选刊 最新文献

Proceedings Second International Workshop on Real-Time Computing Systems and Applications最新文献

筛选
英文 中文
Experiences with building a continuous media application on Real-Time Mach 有在Real-Time Mach上构建连续媒体应用程序的经验
Proceedings Second International Workshop on Real-Time Computing Systems and Applications Pub Date : 1995-10-25 DOI: 10.1109/RTCSA.1995.528756
H. Tezuka, T. Nakajima
{"title":"Experiences with building a continuous media application on Real-Time Mach","authors":"H. Tezuka, T. Nakajima","doi":"10.1109/RTCSA.1995.528756","DOIUrl":"https://doi.org/10.1109/RTCSA.1995.528756","url":null,"abstract":"Real-time system and continuous media system researchers have worked in areas that are considered by each to be unrelated to the other's domain although continuous media system researchers agree with the effectiveness of real-time technologies on continuous media systems. Media control techniques for improving the smoothness of continuous media such as jitter control and inter-stream synchronization schemes are developed for smoothing continuous media streams running on traditional timesharing operating systems. On the other hand, real-time system researchers show the effectiveness of real-time technologies for satisfying timing constraints of the continuous media. However, there is no report to showing the effectiveness of real-time technologies for the media control techniques. This paper describes experiences with building a continuous media application on Real-Time Mach. First, we present the structure of our distributed video player, called QtPlay, and its media control techniques for smoothing continuous media streams, then we show the effectiveness of real-time technologies for the media control techniques.","PeriodicalId":111365,"journal":{"name":"Proceedings Second International Workshop on Real-Time Computing Systems and Applications","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115995333","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: 11
Performance evaluation of real-time message delivery in FDDI networks FDDI网络实时消息传递性能评价
Proceedings Second International Workshop on Real-Time Computing Systems and Applications Pub Date : 1995-10-25 DOI: 10.1109/RTCSA.1995.528749
P. Tsang, J. M. Ng, E. Chan, Chan-Hee Lee
{"title":"Performance evaluation of real-time message delivery in FDDI networks","authors":"P. Tsang, J. M. Ng, E. Chan, Chan-Hee Lee","doi":"10.1109/RTCSA.1995.528749","DOIUrl":"https://doi.org/10.1109/RTCSA.1995.528749","url":null,"abstract":"This paper presents the simulation results on the FDDI medium access protocols and two modified FDDI medium access protocols. For synchronous traffic, there is usually a deadline requirement which specifies the time allowed for the packet to reach its destination. For FDDI, if the delay bound is D, the stations have to set the TTRT=D/2 in order ensure the deadline requirement can be met. This gives the total synchronous bandwidth as D/2-T/sub ring/. However, the total usable synchronous bandwidth is D-T/sub ring/ which means the capability of supporting synchronous bandwidth is halved. Zheng (1992) and Leung (1994) have proposed new schemes to overcome these problems and have no diverse effect on asynchronous throughput. Extensive simulations have been carried out on these schemes to evaluate their performance characteristics. Also, a frame-drop policy at source station is proposed and shown to be effective in improving performance on synchronous transmission.","PeriodicalId":111365,"journal":{"name":"Proceedings Second International Workshop on Real-Time Computing Systems and Applications","volume":"185 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123208269","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: 2
Performance evaluation of a firm real-time database system 某企业实时数据库系统的性能评价
Proceedings Second International Workshop on Real-Time Computing Systems and Applications Pub Date : 1995-10-25 DOI: 10.1109/RTCSA.1995.528760
Stuart Shih, Young-Kuk Kim, S. Son
{"title":"Performance evaluation of a firm real-time database system","authors":"Stuart Shih, Young-Kuk Kim, S. Son","doi":"10.1109/RTCSA.1995.528760","DOIUrl":"https://doi.org/10.1109/RTCSA.1995.528760","url":null,"abstract":"In conventional database systems, performance is primarily measured by the number of transactions completed within a unit time. In real-time applications, timing and criticality characteristics of transactions must be taken into account. In this paper, we examine the performance of StarBase, a firm real-time database system. The deadline guarantee ratio and average response times are the primary performance measures. There have been performance studies on real-time database systems, but most of them were performed using simulation. This work demonstrates the feasibility of developing a real-time database system with an acceptable performance.","PeriodicalId":111365,"journal":{"name":"Proceedings Second International Workshop on Real-Time Computing Systems and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128927927","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: 6
Efficient NMRCD scheme for fault tolerance in responsive systems 响应系统容错的高效NMRCD方案
Proceedings Second International Workshop on Real-Time Computing Systems and Applications Pub Date : 1995-10-25 DOI: 10.1109/RTCSA.1995.528773
C. Fuhrman, S. Chutani, H. Nussbaumer
{"title":"Efficient NMRCD scheme for fault tolerance in responsive systems","authors":"C. Fuhrman, S. Chutani, H. Nussbaumer","doi":"10.1109/RTCSA.1995.528773","DOIUrl":"https://doi.org/10.1109/RTCSA.1995.528773","url":null,"abstract":"A variant of N-Modular Redundancy (NMR) allows an NMR system to have up to twice the throughput while keeping the same reliability model. Each task is executed by a majority of processors. The tasks are diagnosed (by comparing their results) rather than the processors (by a separate diagnostic process). This scheme does not increase the complexity of the circuitry involved as diagnosis does not have to be adaptive. Intermittent and transient, as well as permanent faults are tolerated.","PeriodicalId":111365,"journal":{"name":"Proceedings Second International Workshop on Real-Time Computing Systems and Applications","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133207275","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: 2
A generalized utilization bound test for fixed-priority real-time scheduling 固定优先级实时调度的广义利用率界检验
Proceedings Second International Workshop on Real-Time Computing Systems and Applications Pub Date : 1995-10-25 DOI: 10.1109/RTCSA.1995.528754
Dong-Won Park, S. Natarajan, A. Kanevsky, M. Kim
{"title":"A generalized utilization bound test for fixed-priority real-time scheduling","authors":"Dong-Won Park, S. Natarajan, A. Kanevsky, M. Kim","doi":"10.1109/RTCSA.1995.528754","DOIUrl":"https://doi.org/10.1109/RTCSA.1995.528754","url":null,"abstract":"C.L. Liu and J.W. Layland (1973) provided a utilization bound test which is applicable to rate-monotonic priority assignment, when all tasks deadlines are at the end of their periods. Subsequently, J. Lehoczky et al. (1989) provided an exact schedulability criterion which is applicable to any arbitrary priority assignment scheme, with no restriction on task deadlines, which can be used when all task computation times are known exactly. In this work, we fill an important gap between these two, by presenting a technique for deriving utilization bounds, based on linear programming, that is applicable to similarly generalized situations, but does not require knowledge of exact task computation times.","PeriodicalId":111365,"journal":{"name":"Proceedings Second International Workshop on Real-Time Computing Systems and Applications","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133425513","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: 32
Optimal server allocation for real time computing systems with bursty priority jobs 具有突发优先级作业的实时计算系统的最优服务器分配
Proceedings Second International Workshop on Real-Time Computing Systems and Applications Pub Date : 1995-10-25 DOI: 10.1109/RTCSA.1995.528775
Sung-June Hong
{"title":"Optimal server allocation for real time computing systems with bursty priority jobs","authors":"Sung-June Hong","doi":"10.1109/RTCSA.1995.528775","DOIUrl":"https://doi.org/10.1109/RTCSA.1995.528775","url":null,"abstract":"Among the many distinguishing features of the real-time computing system, the response time might be the most important one. In this paper we consider a MIMD type parallel computer system with different job priority and bursty job arrival pattern. Real-time jobs have higher priority than other jobs to guarantee faster response time, and the job server consists of array of processors, i.e. processor pool. Job requests arrive at different request buffers according to their priority, and we assume that the arrival pattern is a bursty process. These two issues, job priority and the bursty job request pattern, are studied for real-time computing systems. The processor pool is shared in such a way that if high priority queue is not empty, a fixed amount of the processing capacity is allocated to the queue, while the rest of the server is allocated to the other queue. Average waiting time is calculated for both queues. The optimal partition ratio of the processor pool is obtained analytically based on the average waiting time of high priority queue and low priority queue with respect to variable values of traffic loads /spl rho/.","PeriodicalId":111365,"journal":{"name":"Proceedings Second International Workshop on Real-Time Computing Systems and Applications","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121224875","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: 1
A bandwidth reallocation scheme for Ethernet-based real-time communication 一种基于以太网的实时通信带宽再分配方案
Proceedings Second International Workshop on Real-Time Computing Systems and Applications Pub Date : 1995-10-25 DOI: 10.1109/RTCSA.1995.528747
Junghoon Lee, Heonshik Shin
{"title":"A bandwidth reallocation scheme for Ethernet-based real-time communication","authors":"Junghoon Lee, Heonshik Shin","doi":"10.1109/RTCSA.1995.528747","DOIUrl":"https://doi.org/10.1109/RTCSA.1995.528747","url":null,"abstract":"The objective of this paper is to develop a bandwidth reallocation scheme for TDMA-implemented Ethernet. The reallocation protocol consists of reporting change, calculating a new schedule, and reliably broadcasting the schedule. We also address the problem of static assignment of allocation vector, validate the essentiality of reallocation scheme, and design the scheme according to its functional requirements. The proposed scheme changes bandwidth allocation during the run-time operation of network system without affecting other traffics, so it can overcome the problem of static allocation. It completes reallocation within a bounded time as long as there are no transmission errors. Using this approach, the network is allowed to adapt to distributed real-time systems where traffic characteristics change dynamically.","PeriodicalId":111365,"journal":{"name":"Proceedings Second International Workshop on Real-Time Computing Systems and Applications","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115305320","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: 6
Real-time mobile data management using a minimal MMDB 实时移动数据管理使用最小的MMDB
Proceedings Second International Workshop on Real-Time Computing Systems and Applications Pub Date : 1995-10-25 DOI: 10.1109/RTCSA.1995.528761
Eun-Hee Hyun, Sung-Hee Kim
{"title":"Real-time mobile data management using a minimal MMDB","authors":"Eun-Hee Hyun, Sung-Hee Kim","doi":"10.1109/RTCSA.1995.528761","DOIUrl":"https://doi.org/10.1109/RTCSA.1995.528761","url":null,"abstract":"This paper presents practical and empirical approach to the main memory database system and proposes a minimal database system with real-time mobile data management functionality. It introduces a mobile computational viewpoint and gives a full detail of design considerations of real-time main memory database. As a case study, we present how to apply it to location registers in order to achieve both higher performance and a large volume of database capacity. It has a down-sized client/server architecture, including a relational data model, fast access methods, and middleware. This minimal real-time database system goes into use both mobility and subscriber management in a modern digital cellular system.","PeriodicalId":111365,"journal":{"name":"Proceedings Second International Workshop on Real-Time Computing Systems and Applications","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116641650","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
A processor reservation system supporting dynamic QOS control 支持动态QOS控制的处理器预留系统
Proceedings Second International Workshop on Real-Time Computing Systems and Applications Pub Date : 1995-10-25 DOI: 10.1109/RTCSA.1995.528776
H. Fujita, T. Nakajima, H. Tezuka
{"title":"A processor reservation system supporting dynamic QOS control","authors":"H. Fujita, T. Nakajima, H. Tezuka","doi":"10.1109/RTCSA.1995.528776","DOIUrl":"https://doi.org/10.1109/RTCSA.1995.528776","url":null,"abstract":"Quality of service (QOS) is one of the most important factors in multimedia computing. Future continuous media applications should guarantee their QOS values provided by users, and support dynamic QOS control schemes by changing the QOS values according to system load. A processor reservation system developed in CMU is suitable for guaranteeing QOS, but it is not appropriate to support an application with a dynamic QOS control scheme. In this paper, we describe a new processor reservation system which is suitable for dynamic QOS control schemes. It consists of two components: user-level admission server and kernel support. The user-level admission server negotiates processor resources among applications, and the kernel support notifies the malicious use of processor resource by applications.","PeriodicalId":111365,"journal":{"name":"Proceedings Second International Workshop on Real-Time Computing Systems and Applications","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130035250","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: 20
Constructing distributed real-time systems with DROL real-time objects 用DROL实时对象构建分布式实时系统
Proceedings Second International Workshop on Real-Time Computing Systems and Applications Pub Date : 1995-10-25 DOI: 10.1109/RTCSA.1995.528764
K. Takashio, Hidehisa Shitomi, M. Tokoro
{"title":"Constructing distributed real-time systems with DROL real-time objects","authors":"K. Takashio, Hidehisa Shitomi, M. Tokoro","doi":"10.1109/RTCSA.1995.528764","DOIUrl":"https://doi.org/10.1109/RTCSA.1995.528764","url":null,"abstract":"In this paper, the semantics of inter-object communication protocols supported by the distributed real-time programming language DROL that is an extension of C++ based on the Distributed Real-time Object (DRO) model is described. A characteristic common to these protocols is the introduction of a new notion, least suffering. The least suffering assures users of notification of network faults within a required timing constraint and rapid recovery from them. Thus, this notion allows users to construct real-time applications on widely distributed environments. It is impossible for previously proposed real-time programming languages to do it. Through the description of application programs and the discussion of their behavior, we show the effectiveness of the least suffering.","PeriodicalId":111365,"journal":{"name":"Proceedings Second International Workshop on Real-Time Computing Systems and Applications","volume":"515 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123079804","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信