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Fluid approximations for a processor-sharing queue. (English) Zbl 0892.90073
Summary: In this paper a fluid approximation, also known as a functional strong law of large numbers (FSLLN) for a $GI/G/1$ queue under a processor-sharing service discipline is established and its properties are analyzed. The fluid limit depends on the arrival rate, the service time distribution of the initial customers, and the service time distribution of the arriving customers. This is in contrast to the known result for the $GI/G/1$ queue under a FIFO service discipline, where the fluid limit is piecewise linear and depends on the service time distribution only through its mean. The piecewise linear form of the limit can be recovered by an equilibrium type choice of the initial service distribution.
##### MSC:
 90B22 Queues and service (optimization) 60K25 Queueing theory