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Proceeding. 10th EUROMICRO Workshop on Real-Time Systems (Cat. No.98EX168)最新文献

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Best-case analysis for improving the worst-case schedulability test for distributed hard real-time systems 改进分布式硬实时系统最坏情况可调度性测试的最佳案例分析
Pub Date : 1900-01-01 DOI: 10.1109/EMWRTS.1998.684945
J.C. Palencia Gutierrez, J. Javier Gutiérrez, M. González Harbour
We present an improvement of the schedulability analysis technique for distributed hard real time systems that allows us to increase the maximum schedulable resource utilization. Since the improvement affects only the analysis technique, there is no additional implementation cost for the application itself. The improvement in the analysis consists of calculating a lower bound for the best case response time of tasks and messages, in order to reduce the estimated jitter in the activation of subsequent tasks and messages. This reduction of jitter implies reduced worst case bounds for the response times, and thus allows us to increase the maximum schedulable utilization. The paper explores two different ways to calculate a lower bound on the best case execution times. The paper also shows the results of simulations that we have carried out, in which we found that we could increase the maximum schedulable limit of the different resources by approximately 5% more utilization.
我们提出了一种改进的分布式硬实时系统的可调度性分析技术,使我们能够提高可调度资源的最大利用率。由于改进只影响分析技术,因此对应用程序本身没有额外的实现成本。分析中的改进包括计算任务和消息的最佳情况响应时间的下界,以减少激活后续任务和消息时估计的抖动。这种抖动的减少意味着响应时间的最坏情况边界的减少,从而允许我们增加最大可调度利用率。本文探讨了计算最佳情况下执行时间下界的两种不同方法。本文还展示了我们所进行的模拟结果,在模拟中我们发现,我们可以将不同资源的最大可调度限制提高约5%的利用率。
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引用次数: 14
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Proceeding. 10th EUROMICRO Workshop on Real-Time Systems (Cat. No.98EX168)
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