Weighted fair queue having adjustable scaling factor
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United States of America Patent
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Oct 9, 2007
Grant Date -
May 1, 2003
app pub date -
Nov 1, 2001
filing date -
Nov 1, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A scheduler for a network processor includes a scheduling queue in which weighted fair queuing is applied. The scheduling queue has a range R. Flows are attached to the scheduling queue at a distance D from a current pointer for the scheduling queue. The distance D is calculated for each flow according to the formula D=((WF.times.FS)/SF), where WF is a weighting factor applicable to a respective flow; FS is a frame size attributable to the respective flow; and SF is a scaling factor. The scaling factor SF is adjusted depending on a comparison of the distance D to the range R.
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