Realization of autonomous decentralized computing with the RTO.k object structuring scheme and the HU-DF inter-process-group communication scheme

Kim, K.H.; Möri, K.; Nakanishi, Hiroyuki

doi:10.1109/isads.1995.398988

Cited by 32 publications

(5 citation statements)

References 12 publications

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“…Yet as research interests in real-time computing and the rate of developing new realtime computing applications started growing faster in 1990's, the importance of software mechanisms facilitating safe and efficient interactions among concurrent computation threads started receiving a new level of recognition (Anderson et al, 1997;Bershad, 1993;Kim, 1995;Kopetz, 1993Kopetz, , 1997Kopetz et al, 1988;Mock and Nett, 1999;Prakash et al, 1994;Qazi et al, 1993;Rajkumar, 1991;Rajkumar et al, 1995;Zhao et al, 1995). Non-essential synchronizations are highly undesirable in OSs, middleware, and application software used in many real-time applications.…”

Section: Introductionmentioning

confidence: 99%

A Non-Blocking Buffer Mechanism for Real-Time Event Message Communication

Kim

2006

Real-Time Syst

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It is desirable to facilitate data communications among concurrent computation threads without incurring non-essential synchronizations in real-time computing systems. An interaction mechanism, called the non-blocking writer (NBW) mechanism and invented by Kopetz, is useful in facilitating state message communication from a producer to a consumer thread in real-time applications. A more widely applicable practical interaction mechanism called the non-blocking buffer (NBB) is presented here. The NBB mechanism can be viewed as a significant extension of the NBW mechanism. The NBB mechanism facilitates communication of event messages from a producer to a consumer without causing any party to experience blocking. Therefore, its application scope includes all conceivable producer-consumer situations. The NBB mechanism is not a replacement of but rather a companion to the NBW mechanism since the latter facilitates the most efficient state message communication. The application of NBBs in building middleware supporting real-time objects is discussed as a demonstration of the utility of the NBB mechanism.

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Section: Introductionmentioning

confidence: 99%

A Non-Blocking Buffer Mechanism for Real-Time Event Message Communication

Kim

2006

Real-Time Syst

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“…(i) The UDP/IP protocol is supported by almost all kernels through the common socket mechanism. (ii) A connectionless UDP protocol is preferred over the connection oriented TCP protocol because a connectionless protocol eliminates the overhead The programmable DFC scheme is the extension of the conventional data-field (DF) scheme [Mor93,Kim95]. The original DF scheme developed in [Mor86,Mor93] supports establishment of "logical multicast channels" called data field channels (DFC's) shared among the concurrent distributed processes for their interaction in such a way that the idiosyncrasies of the physical communication networks are transparent to the process designer.…”

Section: Programmable Data Field Channel (Dfc)mentioning

confidence: 99%

“…Each DFC was associated with a specific service process. The HU-DF scheme [Kim95] added the functionality of dynamic connection and disconnection between processes and DFC to the original DF scheme.…”

Section: Programmable Data Field Channel (Dfc)mentioning

confidence: 99%

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An efficient middleware architecture supporting time-triggered message-triggered objects and an NT-based implementation

Kim¹,

Ishida²,

Liu³

Proceedings 2nd IEEE International Symposium on Object-Oriented Real-Time Distributed Computing (ISORC'99) (Cat. No.99-61702)

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The time-triggered message-triggered object (TMO) structuring scheme has been established to remove the limitation of conventional object structuring techniques in developing applications containing realtime (RT) distributed computing components. It is a natural and syntactically small but semantically powerful extension of the object oriented (OO) design and implementation techniques which allows the system designer to abstractly and yet accurately specify timing characteristics of data and function components of highlevel distributed computing objects. It is a unified approach for design and implementation of both RT and non-RT distributed applications. A cost-effective way to support TMO-structured distributed RT programming is to build a TMO execution engine as a middleware running on well established commercial software/hardware platforms. In this paper, we present an efficient middleware architecture named TMO Support Middleware (TMOSM) which can be easily adapted to many commercial-off-the-shelf (COTS) platforms. The performance of a prototype implementation of TMOSM running on Windows NT platforms is also discussed.

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“…(6) TMOs can use another interaction mode in which messages can be exchanged over logical message channels of which access gates are explicitly specified as data members of involved objects. The channel facility adopted in the TMO scheme is called the Real-time Multicast and Memory-replication Channel (RMMC) [Kim00], of which an earlier version was called the HU data field channel [Kim95].…”

Section: The Tmo Programming Scheme As a Starting Point For Establishmentioning

confidence: 99%

Wide-area real-time distributed computing in a tightly managed optical grid - an optiputer vision

Kim¹

18th International Conference on Advanced Information Networking and Applications, 2004. AINA 2004.

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Wide area network (WAN) -based distributed computing (DC) has become an active field of research, especially under the label of grid computing. On the other hand, research on WAN-based real-time (RT) DC has remained in an embryonic stage. The situation is changing, however.Continuous increase in the availability of optical channels, called lambdas, along with steady decrease of their costs, have given rise to efforts to establish optical network infrastructure in which the possibility of dynamically allocating entire end-to-end light-paths to different message streams created by a moderate number of important applications is real. With such infrastructure there is no major obstacle in facilitating RT DC. The notion of RT distributed virtual computer (DVC), which can also be viewed as an RT sub-grid, is introduced. Then the challenging issues in adapting some promising technologies established for RT DC in LAN environments to enable realization of RT DVCs in WAN environments are discussed. Programming model and resource management are the focus of the discussion.

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Realization of autonomous decentralized computing with the RTO.k object structuring scheme and the HU-DF inter-process-group communication scheme

Cited by 32 publications

References 12 publications

A Non-Blocking Buffer Mechanism for Real-Time Event Message Communication

A Non-Blocking Buffer Mechanism for Real-Time Event Message Communication

An efficient middleware architecture supporting time-triggered message-triggered objects and an NT-based implementation

Wide-area real-time distributed computing in a tightly managed optical grid - an optiputer vision

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