The word "small" is coming up a lot in this discussion, and
I think packet size really has nothing to do with it. Multiple
streams generating packets of any size would benefit; the
key ingredient is a queue length greater than 1.
I think the intent is to remove queue lock cycles by taking
the whole list (at least up to the count of free ring buffers)
when the queue is greater than one packet, thus effectively
removing the lock expense for n-1 packets.
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