<div dir="ltr"><div style="font-family:arial,sans-serif;font-size:13.63636302947998px">Dear List,</div><div style="font-family:arial,sans-serif;font-size:13.63636302947998px">I am trying to make a bufferbloat fairqueue with qdisc and compare that with fq_codel.</div>
<div style="font-family:arial,sans-serif;font-size:13.63636302947998px">However, I am now having some hard time doing it.</div><div style="font-family:arial,sans-serif;font-size:13.63636302947998px"><br></div><div style="font-family:arial,sans-serif;font-size:13.63636302947998px">
The commands I am using are:</div><div style="font-family:arial,sans-serif;font-size:13.63636302947998px"><br></div><div style="font-family:arial,sans-serif;font-size:13.63636302947998px"><div><div class="im">tc qdisc add dev $IFACE root handle 1: htb default 1<br>
</div>tc class add dev $IFACE parent 1: classid 1:1 htb rate 40mbit<br></div><div>tc qdisc del dev eth4 parent 1:1 handle 10: sfq perturb 10<br></div></div><div style="font-family:arial,sans-serif;font-size:13.63636302947998px">
<br></div><div style="font-family:arial,sans-serif;font-size:13.63636302947998px">And sending packet from the sender, where sfq qdisc is set, to the receiver, the queuing delay is quite small and is approximately the same as when fq_codel enabled.</div>
<div style="font-family:arial,sans-serif;font-size:13.63636302947998px"><br></div><div style="font-family:arial,sans-serif;font-size:13.63636302947998px">However, if I am not using sfq (only htb set), and send only one flow over this link, the delay will explode again.</div>
<div style="font-family:arial,sans-serif;font-size:13.63636302947998px"><br></div><div style="font-family:arial,sans-serif;font-size:13.63636302947998px">So is sfq here cut off the queue length somehow? How should I make a bufferbloat fair queue on linux box using tc qdisc?</div>
<div style="font-family:arial,sans-serif;font-size:13.63636302947998px"><br></div><div style="font-family:arial,sans-serif;font-size:13.63636302947998px">Thanks</div><div style="font-family:arial,sans-serif;font-size:13.63636302947998px">
<br></div><div style="font-family:arial,sans-serif;font-size:13.63636302947998px">-Mo Dong</div></div>