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private-octopus / picoquic

Minimal implementation of the QUIC protocol
MIT License
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Throughput issues when implemented on mininet #1536

Closed meejeei closed 10 months ago

meejeei commented 11 months ago

Hello, I conducted an experiment to compare throughput by configuring a dumbbell topology on a mininet and sending TCP (CUBIC) using iperf3 on top and picoquic on the bottom.

However, I set the bandwidth of the link between the switches to 100M, but found that the combined throughput of TCP and throughput of picoquic exceeded 100M.

If you know the solution, I wonder if you can explain it.

Iperf3-c 10.0.0.2 was sent to the tcp client picoquic client has a ./picoquicdemo-n test-G cubic-D 10.0.0.4 4433 /500000000 For the picoquic server, type ./picoquicdemo -p4433 -G cubic -c /home/... -k /home/.

huitema commented 11 months ago

Looks like this is an issue with your setup, not an issue with TCP or picoquic. I have no idea how mininet "sets the bandwidth to 100M" (megabits or megabytes?), but obviously the way it was done does not work.

meejeei commented 11 months ago

I set the tbf rate to 100Mbit using the netem function of Linux. I'll have to find out if there's another way.

Thank you very much for your quick reply.