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arXiv 2103.09309math.PR
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Grishechkin处理机共享系统稳态性能的积分方程分析

Stationary Performance Analysis of Grishechkin Processor-Sharing Queues: An Integral Equation Approach

Yingdong Lu

摘要:

我们计算了一类广义处理器共享调度策略下的单服务器$M^X/G/1$队列的稳态性能指标,提出了由Grishechkin。这类处理器共享策略允许根据作业获得的服务量将服务能力分配给作业。在[11]中,Grishechkin导出了一个积分方程,该积分方程由这些策略下的静态性能度量的拉普拉斯变换所满足。本文的主要目的是推导这个积分方程的解。这是通过一系列的变换来实现的,这些变换将积分方程转换成更易处理的形式,然后求解它。然后,我们通过逆拉普拉斯变换来获得性能度量的密度函数的近似。在本文的最后一部分,我们将我们的结果应用到一些著名的调度策略,要么是一个特殊的情况下的Grishechkin处理器共享政策,或可以被视为一个序列的限制Grishechkin处理器共享政策。这些例子包括平等的处理器共享政策,歧视性的处理器共享政策,最短剩余处理时间优先规则,前台后台政策和时间函数调度政策。

英文摘要:

We compute the stationary performance metrics of a single server $M^X/G/1$ queue under a class of generalized processor-sharing scheduling policies that are proposed by Grishechkin. This class of processor-sharing policies allow service capacities to be allocated to jobs based on the amount of service they attained. In [11], Grishechkin derives an integral equation that is satisfied by the Laplace transform of the stationary performance metrics under these policies. Our main focus in this paper is to derive the solution to this integral equation. This is achieved through a series of transforms that convert the integral equation into a more tractable form, then solve it. Then we derive approximations to the density functions of the performance metrics through inverting the Laplace transforms. In the last part of the paper, we apply our results to some well-known scheduling policies that are either a special case of the Grishechkin processor-sharing policies or can be treated as the limits of a sequence Grishechkin processor-sharing policies. These examples include the egalitarian processor-sharing policy, the discriminatory processor-sharing policy, shortest residual processing time first rule, foreground-background policy and the time function scheduling policy.

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