CQStat

Tool to measure the outgoing bandwidth usage on a per class/qdisc basis.

This is my first C project, the quality of the code is therefore not great. Feel free to contact me if you find a bug, or suggest improvements. It's still a work in progress and I already have improvements planned.

Prerequisites

Linux kernel headers are required to run this program.

sudo apt update
sudo apt install linux-headers-$(uname -r)

Compile

Execute the following command in the terminal in the path containing nlcomm.c:

gcc nlcomm.c cqstat.c -o cqstat

This should generate a binary file named qdisc_stats in the current working directory.

Execute

Execute the following command in the terminal in the path containing nlcomm.c:

./cqstat

The data will be stored in a csv file, either with the provided name or using the default name cqstat.csv. This data can be plotted using plotting.py. This will generate one figure per network interface.

The dummy.sh script can be used to create a virtual interface pair and configure veth1 with a hierarchical queueing setup. This was made purely for testing purposes.

To Do / Known issues

• Improve plotting
  
• upload example plot
  
• Class based measurement not working...
  • Current workaround: -c/-q flag is being ignored. Internally always being set to -q
    
• Implement ingress bw measurement
  

Final Note

The basis of this code was taken from https://github.com/sbhTWR/qdisc_stats/ This program fetches queue statistics once and displays them on the terminal