HP ProCurve 9304M Manual Supplement page 27

Quality of Service (QoS) Algorithms
The weights of the lower queues determine how many times the next higher queue will chain to them before
moving to an even lower queue. Because queue 2's weight is 3, the algorithm chains from queue 3 to queue 2
three times before chaining farther down to queue 1. Because queue 1's weight is 2, the algorithm chains to
queue 1 twice during the cycle, once after each iteration of servicing queue 2. Queue 0 always has a weight of 0
and always is serviced only once during the cycle, at the very end.
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