RTT of BBR algorithm in LSQUIC

[vanvantong]

Hi alls, I am running experiments to evaluate the performances of the BBR algorithm with lsquic library. I set the bandwidth to 5Mbps, change the loss from 0.1 to 5 percent, and evaluate the average RTT of packets. The average RTT is 116728 us with 0.1% of loss and 5Mbps of bandwidth while it is 43205 us with 5% of loss and 5Mbps of bandwidth. RTT is measured via rtt parameter in lsquic_bw_sampler_packet_acked function (in lsquic_bw_sampler.c). Do anybody know why RTT decreases when I increase the loss from 0.1 to 5 percent? Thank you in advance!

Best regards, Van