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۱Global Stability Analysis Based on Lyapunov–Krasovskii Theorem for Computer Networks with Fixed Communication Delay
نویسنده(ها): ، ، ،
اطلاعات انتشار: شانزدهیمن کنفرانس مهندسی برق ایران، سال
تعداد صفحات: ۵
In this paper, a global stability analysis of a rate–based congestion control system modeled by a first order nonlinear delay differential equation is given. The model determines the dynamics of a single source single link network, with fixed communication delay. We obtain a delay–independent condition on system parameters under which global asymptotic stability of the system is guarantied. The proof is based on an extension of Lyapunov–Krasovskii theorem for a class of nonlinear time–delay systems.<\div>

۲Program Phase Detection in Heterogeneous Multi–Core Processors
نویسنده(ها): ،
اطلاعات انتشار: چهاردهمین کنفرانس بین المللی سالانه انجمن کامپیوتر ایران، سال
تعداد صفحات: ۶
In present study, in order to improve the performance and reduce the amount of power which is dissipated in heterogeneous multicore processors, the ability of detecting the program execution phases is investigated. The program’s execution intervals have been classified in different phases based on their throughput and the utilization of the cores. The results of implementing the phase detection technique are investigated on a single core processor and also on a multi–core processor. To minimize the profiling overhead, an algorithm for the dynamic adjustment of the profiling intervals is presented. It is based on the behavior of the program and reduces the profiling overhead more than three fold. The results are obtained from executing multiprocessor benchmarks on a given processor. In order to show the program phases clearly, throughput and utilization of execution intervals are presented on a scatter plot. The results are presented for both fixed and variable intervals.<\div>
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