Method and apparatus for improving the fairness of new attaches to a weighted fair queue in a quality of service (QoS) scheduler
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United States of America Patent
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Aug 14, 2007
Grant Date -
Sep 25, 2003
app pub date -
Mar 20, 2002
filing date -
Mar 20, 2002
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a first aspect, a network processor includes a scheduler in which a scheduling queue is maintained. A last frame is dispatched from a flow queue maintained in the network processor, thereby emptying the flow queue. Data indicative of the size of the dispatched last frame is stored in association with the scheduler. A new frame corresponding to the emptied flow queue is received, and the flow corresponding to the emptied flow queue is attached to the scheduling queue. The flow is attached to the scheduling queue at a distance D from a current pointer for the scheduling queue. The distance D is determined based at least in part on the stored data indicative of the size of the dispatched last frame.
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