CC'ing TCPM on my responses to this thread... On 10/7/2015 8:50 AM, Francini, Andrea (Andrea) wrote: > How about the effect of ACK suppression on the growth of the > congestion window, for TCP sources where the trigger for window growth > is the arrival of an ACK, not the number of bytes it acknowledges? > > The Appropriate Byte Counting (ABC) option > (https://tools.ietf.org/html/rfc3465) was addressing a similar issue > with delayed ACKs, but it looks like it is no longer available in Linux > (http://www.spinics.net/lists/netdev/msg225164.html).
Even with ABC, killing off some of the ACKs would result in sender bursts because you're interfering with ACK clocking -- unless ABC were coupled with some sort of rate pacing. Note also that when you kill off intermediate ACKs you're increasing the round-trip delay. The sender can't start sending what you ACK until the ACK arrives; if you kill off earlier ACKs, then the later ACK will (by definition) arrive later. This is bad on many levels. Joe _______________________________________________ aqm mailing list aqm@ietf.org https://www.ietf.org/mailman/listinfo/aqm
