This paper investigates a custornimd systems, work conserving schedulm will be examined. The ideal scheduling discipline is Generalised Processor Sharing (~ps). Packets are organised into separate logical queues with each nonempty queue visited in and an inffitesimally fair allocation of bandwidth and offers protection, but it cannot h'ansmit packets as entities. Round Robin is the simplest emulation of GPS and serves packets from each nonempty queue while WRR provides connection based bandwidth guarantees. Both approximate GPS reasonably well . when all packets have the same size. Deficit Round Robin can handle variable size packets and is suitable when packets are irnplemcatation for XiUm Virtex Pro board of a Weighted Fair Queuiq gvFQ) tag scheduler that bas tbe capacity to *ewe 8,000 i u d k i d d scpsionr at over lOOMHz The implementation is sctndly upsble of b a n d l i up to 64,OOO different sessions an excellent hardware cosl for a next generation terabit router. r e q n i~g the size FPGA. Thb represene small amount of d a b served *om each queue. GPS achieves
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