[Flent-users] [tohojo/flent] support for flowgrind (#219)

[Flent-users] [tohojo/flent] support for flowgrind (#219)

[Jonas Smedegaard]

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the tool flowgrind seems like it might be an interesting backend for flent to support: https://github.com/flowgrind/flowgrind

From its README:

> Unlike most cross-platform testing tools, flowgrind can output some transport layer information, which are usually internal to the TCP/IP stack. For example, on Linux and FreeBSD this includes among others the kernel's estimation of the end-to-end RTT, the size of the TCP congestion window (CWND) and slow start threshold (SSTHRESH).

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[Flent-users] Re: [tohojo/flent] support for flowgrind (#219)

[Toke Høiland-Jørgensen]

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Jonas Smedegaard <notifications@github.com> writes:

> the tool flowgrind seems like it might be an interesting backend for
> flent to support: https://github.com/flowgrind/flowgrind
>
> From its README:
>
>> Unlike most cross-platform testing tools, flowgrind can output some
>> transport layer information, which are usually internal to the TCP/IP
>> stack. For example, on Linux and FreeBSD this includes among others
>> the kernel's estimation of the end-to-end RTT, the size of the TCP
>> congestion window (CWND) and slow start threshold (SSTHRESH).

These values Flent can already extract (using the 'ss' tool). Just
enable --socket-stats :)

Also from its README:

>  In contrast to similar tools like iperf or netperf it features a
>  distributed architecture, where throughput and other metrics are
>  measured between arbitrary flowgrind server processes.

...which makes me suspect it's not a very good fit for Flent.


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