Hello,
I originally posted this in the aqm list; re-posted to this, more appropriate,
list:
There exists a short-circuit into a "deeper" drop state if we were previously
and recently in a drop state. I understand the need for this, but I'm curious
where the '16' came from? How was this decided upon?
For example, here's the ns3 implementation:
/*
* if min went above target close to when we last went below it
* assume that the drop rate that controlled the queue on the
* last cycle is a good starting point to control it now.
*/
int delta = m_count - m_lastCount;
if (delta > 1 && CoDelTimeBefore (now - m_dropNext, 16 * Time2CoDel
(m_interval)))
{
m_count = delta;
NewtonStep ();
}
If I read this correctly, it says;
If we have previously dropped for more than one interval, and have re-entered
the drop state in less then 16 intervals from the previous drop state, then
short circuit count to the delta... but why 16 intervals?
--Jeff
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