Avoiding unfair advantage in weighted round robin (WRR) scheduling

摘要

A network device includes multiple queues to store packets to be scheduled, and a weighted round-robin (WRR) scheduler. The WRR scheduler performs a first WRR scheduling iteration including processing of at least one packet from a particular queue of the multiple queues, identifies the particular queue as an empty queue during the performing of the first WRR scheduling iteration, identifies the particular queue as a non-empty queue after the identifying the particular queue as the empty queue, and performs a second WRR scheduling iteration including processing of only one packet of a group of packets from the particular queue of the multiple queues.