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There are lots of TCP variants available (bbr, cubic, Westwood, reno) in the Linux. But how to evaluate the performance of these variants? Which are the popular tools used to extract the congestion window and RTT information?

iperf and other similar traffic generator can be used to generate traffic but how to get congestion window and other TCP metric information?

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    What is your performance objective? – Maxim Egorushkin Feb 5 at 15:37
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    I want to see how congestion window varies for each variants, when I run iperf or something similar. – sudo Feb 6 at 2:38
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    You can capture your TCP flow with tcpdump and then read and analyze the capture in Python. – Maxim Egorushkin Feb 6 at 8:39
  • Users at networkengineering.stackexchange.com may have good answers for this. – homocomputeris Feb 6 at 18:42

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