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At R=100 SYNs/sec, RTT=250, and L=382, ((L-1)/L)^(RTT*R) = 93%, which is not so bad. Drop-oldest is better with those three numbers, since it works 100% (modulo ordinary problems), but its performance falls off the cliff to 0% at R=L/RTT. If you have a short queue and care about long RTT's, random drop is better than drop-oldest. Since the weekend, I've been pushing code that switches from drop-oldest to random-drop as the bombing rate increases. That might be overkill, but hey!, its only a handful of lines of code and the problem is fun to think about. Also since the weekend, I've been told FreeBSD and Linux have some kind of queue pruning code. Vernon Schryver, [email protected] - - - - - - - - - - - - - - - - -
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