SwePub
Sök i SwePub databas

  Utökad sökning

Träfflista för sökning "WFRF:(Nolte Thomas) srt2:(2007)"

Sökning: WFRF:(Nolte Thomas) > (2007)

  • Resultat 1-10 av 10
Sortera/gruppera träfflistan
   
NumreringReferensOmslagsbildHitta
1.
  • Behnam, Moris, et al. (författare)
  • Independent Abstraction and Dynamic Slack Reclaiming in Hierarchical Real-Time Open Systems
  • 2007
  • Ingår i: Proceedings of the Work-In-Progress (WIP) session of the 19th Euromicro Conference on Real-Time Systems (ECRTS'07), Pisa, Italy. ; , s. 1-4
  • Konferensbidrag (refereegranskat)abstract
    • Independent subsystem abstraction allows subsystems to be developed and validated separately and supports an easier subsystem integration. In particular, this approach is desirable in open systems, since it does not require knowledge of temporal behaviour of other subsystems. However, independentabstraction, assuming the worst-case CPU supply pattern, requires extra CPU allocations. We present our work in progress on dynamic slack reclamation, which keeps track of such extra CPU allocations at run time. We are also investigating how to utilize those extra resources for supporting soft real-time tasks.
  •  
2.
  • Behnam, Moris, et al. (författare)
  • SIRAP : A Synchronization Protocol for Hierarchical Resource Sharing in Real-Time Open Systems
  • 2007
  • Ingår i: EMSOFT'07: Proceedings of the Seventh ACM and IEEE International Conference on Embedded Software. - New York, New York, USA : ACM Press. - 9781595938251 ; , s. 279-288
  • Konferensbidrag (refereegranskat)abstract
    • This paper presents a protocol for resource sharing in a hierarchical real-time scheduling framework. Targeting real-time open systems, the protocol and the scheduling framework significantly reduce the efforts and errors associated with integrating multiple semi-independent subsystems on a single processor. Thus, our proposed techniques facilitate modern software development processes, where subsystems are developed by independent teams (or subcontractors) and at a later stage integrated into a single product. Using our solution, a subsystem need not know, and is not dependent on, the timing behaviour of other subsystems; even though they share mutually exclusive resources. In this paper we also prove the correctness of our approach and evaluate its efficiency.
  •  
3.
  • Behnam, Moris, et al. (författare)
  • SIRAP: A Global Resource Sharing Protocol Facilitating Integration of Semi-independent Real-Time Systems
  • 2007
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • This paper presents a protocol for resource sharing in a hierarchical real-time scheduling framework. Together, the protocol and the scheduling framework significantly reduce the efforts and errors associated with integrating multiple semi-independent subsystems on a single processor. Thus, our proposed techniques facilitate modern software development processes, where subsystems are developed by independent teams (or subcontractors) and at a later stage integrated into a single product. Using our solution, a subsystem need not know, and is not dependent on, the timing behaviour of other subsystems; even though they share mutually exclusive resources. In this paper we also prove the correctness of our approach and evaluate its efficiency.
  •  
4.
  • Fredriksson, Johan, et al. (författare)
  • Clustering Worst-Case Execution Times for Software Components
  • 2007
  • Ingår i: Proceedings of the 7th International Workshop on Worst Case Execution Time Analysis (WCET'07), Pisa, Italy. - 9783939897057 ; , s. 19-25
  • Konferensbidrag (refereegranskat)abstract
    • For component-based systems, classical techniques for WCET-estimation produce unacceptable overestimations of the WCET. This is because software components have more general behavior in order to support reuse. Existing tools and methods for component-based software engineering (CBSE) do not yet adequately consider reusable analyses.We present a method that allows different WCETs to be associated with subsets of the component behavior by clustering WCETs with respect to behavior. The method is intended to be used for facilitating reusable WCET analysis for reusable software components. We illustrate our technique and demonstrate its potential in achieving tight WCET-estimates for components with rich behavior.
  •  
5.
  • Fredriksson, Johan, et al. (författare)
  • Contract-Based Reusable Analysis for Software Components with Extra-Functional Properties
  • 2007
  • Ingår i: Proceedings of the Work-In-Progress (WIP) session of the 19th Euromicro Conference on Real-Time Systems (ECRTS'07), Pisa, Italy. ; , s. 57-60
  • Konferensbidrag (refereegranskat)abstract
    • Component-based software engineering (CBSE) for embedded systems is currently gaining ground because of shortened time-to-market, reduced development costs and increased software quality. One main characteristic of CBSE that enable these benefits is its facilitation of component reuse. However, existing tools and methods do not consider reuse of extra-functional properties in these systems.In this paper we extend our previous work on contract-based reusable execution time predictions for software components with additional extra-functional properties, such as memory and energy consumption.
  •  
6.
  • Fredriksson, Johan, et al. (författare)
  • Contract-Based Reusable Worst-Case Execution Time Estimate
  • 2007
  • Ingår i: Proceedings of the 13th IEEE International Conference on Embedded and Real-Time Computing Systems and Applications (RTCSA'07). - 9780769529752 ; , s. 39-46
  • Konferensbidrag (refereegranskat)abstract
    • We present a contract-based technique to achieve reuse of known worst-case execution times (WCET) in conjunction with reuse of software components. For resource constrained systems, or systems where high degree of predictability is needed, classical techniques for WCET-estimation will result in unacceptable overestimation of the execution-time of reusable software components with rich behavior. Our technique allows different WCETs to be associated with subsets of the component behavior. The appropriate WCET for any usage context of the component is selected be means of component contracts over the input domain. In a case-study we illustrate our technique and demonstrate its potential in achieving tight WCET-estimates for reusable components with rich behavior.
  •  
7.
  • Fredriksson, Johan, et al. (författare)
  • Reusing Worst-Case Execution Time Analysis with Component Contracts
  • 2007
  • Ingår i: Proceedings of the 9th Real-Time in Sweden (RTiS'07).
  • Konferensbidrag (refereegranskat)abstract
    • We present a contract-based technique to achieve reuse of known worst-case execution times (WCET) in conjunction with reuse of software components. For resource constrained systems, or systems where high degree of predictability is needed, classical techniques for WCET-estimation will result in unacceptable overestimation of the execution-time of reusable software components with rich behavior. Our technique allows different WCETs to be associated with subsets of the component behavior. The appropriate WCET for any usage context of the component is selected be means of component contracts over the input domain. In a case-study we illustrate our technique and demonstrate its potential in achieving tight WCET-estimates for reusable components with rich behavior.
  •  
8.
  • Kaczynski, Giordano A., et al. (författare)
  • Deriving Exact Stochastic Response Times of Periodic Tasks in Hybrid Priority-driven Soft Real-time Systems
  • 2007
  • Ingår i: Proceedings of 12th IEEE International Conference on Emerging Technologies and Factory Automation (ETFA'07), Patras, Greece. - 9781424408269 ; , s. 101-110
  • Konferensbidrag (refereegranskat)abstract
    • The aim of this paper is to allow for hybrid task sets in the context of stochastic real-time analysis. The paper goes beyond previous work by allowing for the presence of aperiodic tasks in the system. Instead of representing a task with a fixed activation period and a Worst-Case Execution Time (WCET), here a task is characterized by an Arrival Profile (AP) and an Execution Time Profile (ETP), both given by random variables with known distributions. Any number of aperiodic tasks, with arbitrary arrival and execution time profiles, can be dealt with. To cope with the unbounded interference introduced by aperiodic tasks in the system, sporadic and aperiodic tasks are encapsulated within servers. The paper presents the calculus for obtaining the exact ETP of servers, which allows us to derive exact response time distributions of periodic tasks. Also, an example is used to show the potential and validity of the proposed approach. 
  •  
9.
  •  
10.
  • Åkerholm, Mikael, et al. (författare)
  • The SaveCCM Language Reference Manual
  • 2007
  • Rapport (övrigt vetenskapligt/konstnärligt)abstract
    • This language reference describes the syntax and semantics of SaveCCM, acomponent modeling language for embedded systems designed with vehicle applications and safety concerns in focus. The SaveCCM component model wasdefined within the SAVE project. The SAVE components are influenced mainlyby the Rubus component technology, with a switch concept similar to thatin Koala. The semantics is defined by a transformation into timed automatawith tasks, a formalism that explicitly models timing and real-time task scheduling.The purpose of this document is to describe a semantics of the SAVE component modeling language, which can be used to describe timing and functional behavior of components. The model of a system is in some cases an over approximation of the actual system behavior. An implementation of a model can resolve non-determinism e.g. by merging tasks or assigning a scheduling policy (such as static scheduling or fixed priority, preemptive or not) that will resolvethe non-determinism.
  •  
Skapa referenser, mejla, bekava och länka
  • Resultat 1-10 av 10

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

 
pil uppåt Stäng

Kopiera och spara länken för att återkomma till aktuell vy