Gergeleit, Martin, J. Kaiser, and H. Streich, "DIRECT: Towards a Distributed Object-Oriented Real-Time Control System," Technical Report, 1996. Available from http:// borneo.gmd.de:80/RS/Papers/direct/direct.html.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....by the off the shelf instrumentation system JEWEL is fed to a dynamic scheduler. The scheduler uses this information to adaptively control the real time system to be responsive to the variation of important system variables. Reference: http: borneo.gmd.de:80 RS Papers direct direct.html and [7,15] Dynamic Resource Scheduling RMON RMON monitors the resource usage for distributed multimedia systems running RT Mach. Information collected by the instrumentation system is used for adaptively managing the system resources through real time features of the operating system. Reference: ....

Gergeleit, Martin, J. Kaiser, and H. Streich, "DIRECT: Towards a Distributed Object-Oriented Real-Time Control System," Technical Report, 1996. Available from http:// borneo.gmd.de:80/RS/Papers/direct/direct.html.

....real time IS for testing and correctness checking on heterogeneous computing systems. SPI supports a user defined, application specific instrumentation development environment, which is based on an eventaction model and event specification language. Adaptive real time control DIRECT JEWEL [8], 17] Runtime information collected by the off the shelf instrumentation system JEWEL is fed to a dynamic scheduler. The scheduler uses this information to adaptively control the real time system to be responsive to the variation of important system variables. Dynamic resource scheduling ....

# M.J. Gergeleit and H. Streich, "DIRECT: Towards a Distributed Object--Oriented Real-Time Control System," technical report, 1996.

....by the off the shelf instrumentation system JEWEL is fed to a dynamic scheduler. The scheduler uses this information to adaptively control the real time system to be responsive to the variation of important system variables. Reference: http: borneo.gmd.de:80 RS Papers direct direct.html and [7,15] Dynamic Resource Scheduling RMON RMON monitors the resource usage for distributed multimedia systems running RT Mach. Information collected by the instrumentation system is used for adaptively managing the system resources through real time features of the operating system. Reference: ....

Gergeleit, Martin, J. Kaiser, and H. Streich, "DIRECT: Towards a Distributed Object-Oriented Real-Time Control System," Technical Report, 1996. Available from http:// borneo.gmd.de:80/RS/Papers/direct/direct.html.

....system you are talking about. There exist several of these on the market and in research departments. To give a picture of what a real time operating system provides, an example of a system for distributed systems follows. The system in question is called DIRECT Distributed REal time ConTrol [6]. This is an object oriented control system used to build distributed systems with a standard real time os used locally, and any real time communication medium. The system provides a distributed high resolution ( s) real time clock. Dynamic scheduling is used, with parameters that control the ....

.... Computing Node adapted Compiler Object Runtime Local Sensor Local Real Time OS I O Device Application Objects Computing Node JEWEL Visualization Event Collection Constraint Checking Real Time Communication Monitoring and Control Communication Figure 1: The DIRECT architecture (picture from [6], grey areas indicate implemented parts. 7 LANGUAGES AND COMPILERS 7 7 Languages and Compilers DIRECT also comes with an adapted compiler, basically C that supports the system with some extra timing info. And support for distributed synchronization. This is also a typical example of ....

M. Gergeleit, J. Kaiser, H. Streich, DIRECT: Towards a Distributed Object-Oriented Real-Time Control System, Workshop on Concurrent Object-based Systems, in conjunction with the IEEE Symp. on Parallel and Distr. Processing, Dallas, TX, October 1994, http://borneo.gmd.de/RS/Papers/direct/direct.html, (http://set.gmd.de/RS/)

....feedback system as a model, we can frame parallel file system policy optimization as a dynamic steering problem that tracks performance to refine file system policy selection. This type of computational steering framework has proven useful in other contexts (e.g. Vetter [8] Wood [9] Gergeleit [10], and Gu [11] In our dynamic steering framework, we monitor performance sensors that encapsulate the performance of critical file system features, consult access pattern dependent policy selectors that map changes in input output performance to potential policy changes, and invoke system ....

....SciChem from Parker [28] are two representative examples of this interactive approach. In contrast to interactive steering environments, automatic steering environments do not require continuing user involvement. Instead, steering decisions are made automatically without user intervention. DIRECT [10], Falcon [29,30] and the Meta Toolkit [9] all provide automatic steering interfaces. DIRECT targets real time applications, a domain where the primary concern is validating that the system meets real time constraints. This goal is different from run time performance improvement, but the steering ....

GERGELEIT, M., KAISER, J., AND STREICH, H. Direct: Towards a Distributed ObjectOriented Real-Time Control System. In Workshop on Concurrent Object-based Systems (Oct. 1994).

....control subsystems. Welch, Masters, and Harrison explore a path based paradigm for developing a control system software architecture for large scale, ship board, distributed, real time control systems [23] Gergeleit et al. describe the use of Jewel IS for a distributed, real time control system [5]. Adaptive control of ISs for long running parallel and distributed applications have been implemented using different techniques. For instance, the Pablo instrumentation system can adaptively change its instrumentation level to generate a smaller volume of instrumentation data during execution if ....

Gergeleit, Martin, J. Kaiser, and H. Streich, "DIRECT: Towards a Distributed Object-Oriented RealTime Control System," Technical Report, 1996. Available from http://borneo.gmd.de:80/RS/Papers/ direct/direct.html.

No context found.

Gergeleit, M., J. Kaiser, H. Streich (1994b). DIRECT: Towards a Distributed Object-Oriented Real-Time Control System. Workshop on Concurrent Object-based Systems.

No context found.

M. Gergeleit, J. Kaiser, H. Streich: "DIRECT: Towards a Distributed Object-Oriented Real-Time Control System", Workshop on Concurrent Object-based Systems, Oct. 1994.

....by a real time activity. The global scheduling in a distributed system requires consensus between all participants about the usage of shared system resources. Particularly, if a joint action will be performed, all local resources must be available and reserved for the respective computation[5]. The global plan has to be enforced by all participants, based on their local information. In a completely static system, a global calendar is available and each participant has its relevant entries referring to its activities in a global time scale. A local activity may only be started according ....

M. Gergeleit, J. Kaiser, H. Streich: "DIRECT: Towards a Distributed ObjectOriented Real-Time Control System", Workshop on Concurrent Object-based Systems, Oct. 1994.

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