Visualizing Streams in Qlogs about qvis HOT 1 OPEN

Hey @abnv418,

The multiplexing tab was specifically designed to give you an idea of whether the streams are being multiplexed/round-robined or sent in sequential order... could you maybe share a screenshot of what you're seeing so I can help interpret it for you? Or better yet a qlog file?

If that's not enough, you can of course also just use the sequence diagram. That should show you for each QUIC packet for which stream it carries data. If you always see the same Stream ID in a given burst of packets before you see another Stream ID there, that would indicate sequential. If you instead see Stream ID switching each X packets (say each 1, 2, 4, 10, 20 packets for example), then you'd have round-robin/multiplexing behaviour.

In terms of throughput, that's a difficult metric to define here, and what you're seeing might just be an artefact of how aioquic is measuring it internally (e.g., if it IS multiplexing, the bandwidth is divided between different streams, causing the per-stream throughput to be lower?). You might look at the congestion diagram to get an idea of how the bandwidth was for the entire connection. If that seems to be stable, then aioquic is lying to you/you're misinterpreting what it's telling you ;) If the entire connection's bandwidth drops (e.g., lots of packet loss, low congestion window overall, use the ruler tool to measure slopes), then it's not due to multiplexing but rather failing congestion control.

I hope that helps!

from qvis.