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Seems like this user land tcp stack could be the basis of types of c10m servers. Are tbere existenting userland tcp stacks available? I'm not familiar with any.


http://shader.kaist.edu/mtcp/

http://www.openonload.org/

There's also some work showing that you can achieve very high performance with kernel TCP: https://www.usenix.org/conference/osdi14/technical-sessions/...


I build stacks that are highly customized for the target solution and are impractical for general purpose use.

A good general purpose stack is the 6windgate stack. I know nothing about it personally, but I know that a lot of people do use it successfully.


Also take a look at NetBSD's rump kernels and PicoTCP. Nobody mentioned them.


Check out snabb switch: http://www.snabb.co/ https://github.com/SnabbCo/snabbswitch/wiki


lwip would be a well-known example, right?




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