. L. R. Welch, B. Ravindran, B. Shirazi and C. Bruggeman, "Specification and analysis of dynamic, distributed real-time systems", in Proceedings of the 19 IEEE Real-Time Systems Symposium, 72-81, IEEE Computer Society Press, 1998.  Home/Search   Document Not in Database   Summary   Related Articles   Check

No context found.

. L. R. Welch, B. Ravindran, B. Shirazi and C. Bruggeman, "Specification and analysis of dynamic, distributed real-time systems", in Proceedings of the 19 IEEE Real-Time Systems Symposium, 72-81, IEEE Computer Society Press, 1998.

No context found.

L. R. Welch, B. Ravindran, B. Shirazi and C. Bruggeman, "Specification and analysis of dynamic, distributed real-time systems," in Proceedings of the 19 IEEE Real-Time Systems Symposium, 72-81, IEEE Computer Society Press, 1998.

....(A description of the testbed is provided in [3] The remainder of this paper will focus on the portion of the reference architecture which pertains to resource management (RM) The components which constitute RM services are: 1) resource mgt. neg. 2) resource allocation, 3) QoS specs (see [2] and [3] for details of the RM Spec specification language) 4) resource control, 5) appl. QoS mgt. neg. 6) application QoS broker, 7) application control agent, and (8) resource QoS broker. Several components perform RM services, but also serve other roles; the components in this class ....

.... The diagram in Figure 3 details the roles undertaken by the resource allocation component, which include: mapping scheduling: solves the global scheduling problem by mapping computation subpaths and communication subpaths to host resources and network resources, respectively (see [2]and [3] for detailed discussions of paths and subpaths) stability analysis: detects system level thrashing. tradeoff analysis: optimizes along several (possibly conflicting) dimensions. constraint analysis, dependency analysis: ensures that required mapping constraints and ....

L. R. Welch, B. Ravindran, B. Shirazi and C. Bruggeman, "Specification and analysis of dynamic, distributed real-time systems," in Proceedings of the 19 th IEEE Real-Time Systems Symposium, 72-81, IEEE CS Press, 1998.

....which will be used to describe our approach for providing security and resource management for dynamic real time systems. INBOUNDS notifies SECURE RM of individual intrusion events. This information is combined with knowledge of the software system attributes and the hardware system attributes [1], and information about the current allocation of (hardware) resources to the software systems [1] to ascertain the adversary s strategic goals. The results of the analysis are presented to the decision maker in terms pertaining to system structure, QoS and mission goals. Resource QoS ....

....dynamic real time systems. INBOUNDS notifies SECURE RM of individual intrusion events. This information is combined with knowledge of the software system attributes and the hardware system attributes [1] and information about the current allocation of (hardware) resources to the software systems [1] to ascertain the adversary s strategic goals. The results of the analysis are presented to the decision maker in terms pertaining to system structure, QoS and mission goals. Resource QoS Monitoring Secure RM adversary s strategic goals, action advice, metrics queries re allocation actions QoS ....

[Article contains additional citation context not shown here]

L. R. Welch, B. Ravindran, B. Shirazi and C. Bruggeman, "Specification and analysis of dynamic, distributed real-time systems," in Proceedings of the 19 th IEEE Real-Time Systems Symposium, 72-81, IEEE Computer Society Press, 1998.

.... as a function of time and resource allocation At a slightly higher level of abstraction benefit is calculated as a function of the completion time as it relates to the release time or deadline for that period but controlled by a higher level resource allocation mechanism, as in DeSiDeRaTa [11], SMART [16] and Rialto [17] In this case benefit is specified as a direct linear function of time and may or may not be used in the actual scheduling decisions as any scheduler that minimizes wait time will also tend to maximize benefit. Benefit is controlled by managing resource allocations so ....

.... met [9, 18] Even with hard and firm real time applications, more resources can always be considered better in the sense that with greater resources each application is in some sense less likely to miss a deadline through data dependent variations in processing time or other system fluctuations [11]. While individual threads may cooperate to achieve the goals of the applications, application benefit can remain constant despite changes in thread level execution. In particular, application benefit is not merely the sum of a theoretical lower level benefit of the threads implementing the ....

L.R.Welch,B.Ravindran,B.ShiraziandC.Bruggeman, "Specification and analysis of dynamic, distributed real-time systems," in Proceedings of the 19 th IEEE Real-Time Systems Symposium, 72-81, IEEE Computer Society Press, 1998.

....using a priori worst case execution times can lead to poor resource utilization, particularly when the difference between WCET and normal execution time is large. Furthermore, it is stated in [12, 1] that accurately measuring WCET is often difficult and sometimes impossible. DeSiDeRaTa project [17] is addressing these shortcomings. One of the fundamental innovations of the DeSiDeRaTa project is the dynamic path paradigm, which is employed for modeling and resource management of large grain, distributed real time missioncritical systems. The approach was experimentally validated on a ....

L. R. Welch, B. Ravindran, B. Shirazi and C. Bruggeman, "Specification and analysis of dynamic, distributed real-time systems," in Proceedings of the 19 th IEEE Real-Time Systems Symposium, 72-81, IEEE Computer Society Press, 1998.

....via employing the model, metrics and techniques; and (6) results from applying our technology to a large distributed computing system. In this paper we define a new QoS reference architecture, and we elaborate the details of the language, system model, metrics, and middleware presented in [Wel98]. Furthermore, the experimental results presented in [Wel98] were performed on a benchmark system, whereas this paper presents results from applying the technology within an experimental Navy distributed computing system. The authors have developed an adaptive QoS reference architecture which ....

....(6) results from applying our technology to a large distributed computing system. In this paper we define a new QoS reference architecture, and we elaborate the details of the language, system model, metrics, and middleware presented in [Wel98] Furthermore, the experimental results presented in [Wel98] were performed on a benchmark system, whereas this paper presents results from applying the technology within an experimental Navy distributed computing system. The authors have developed an adaptive QoS reference architecture which provides a plan for constructing a dynamic QoS and resource ....

[Article contains additional citation context not shown here]

L. R. Welch, B. Ravindran, B. Shirazi and C. Bruggeman, "Specification and analysis of dynamic, distributed real-time systems," in Proceedings of the 19 th IEEE Real-Time Systems Symposium, 72-81, IEEE Computer Society Press, 1998.

Online articles have much greater impact   More about CiteSeer.IST   Add search form to your site   Submit documents   Feedback  

CiteSeer.IST - Copyright Penn State and NEC