>Compare response of UKLight vs. netem -- no background traffic, router buffer=25% BDP, duration: 600sec, 2 iterations


Plots of TCP transmission under the following three configurations : - TCP over UKLight link, no netem, 177ms - TCP over local testbed, with all netem dealy is at the receiver (i.e., all packets (ACKs) from receiver are delayed RTT ms - TCP over local testbed, using the Intermediate Functional Block (IFB) option of netem to add RTT/s delay on the incoming interfacdes of the router and another RTT/2 worth of delay at the receiver outgoing interface.

One TCP Flow

Two TCP flows

Two TCP flows, Linux kernel 2.6.18.2 (containes a patch to cubic-TCP that corrects a math error that causes its cwnd to grow too slowly)