It defaults to 3000 bytes, which is roughly twice as fast as TCP, which uses one segment, i.e. The closer the measured delay gets to the target, the smaller the effective gain will be. Setting the target delay to 1s (from the default 100ms) could have a small impact as it makes the 'delay factor' smaller, and the small delay that is detected has much less impact on throttling.Īnother important setting is utp_gain_factor, which is specified as number of bytes per ACK (at 0 delay). Would you mind sharing what you've set the utp_* settings to? However, it looks like you've tweaked the uTP parameters, or at least the target delay. The problem is that the cwnd pulls back a lot more than cut in half when there's packet loss (or times 0.78 as I updated in that patch). It's not the sawtooth itself that't the problem, it's expected when there's no buffer delay.
