[medawsonjr]

Or better yet, Mellanox VMA since it's open source (unlike Solarflare OpenOnload) and the NICs are far less expensive.

[bitcharmer]

That's not true. OpenOnload is open source:

https://github.com/majek/openonload

[jackbondpreston]

https://github.com/xilinx-cns/onload

[gpderetta]

It as been OSS since forever, but I thought that there were some patent gotchas. In any case it now apparently even support non-SolarFlare NICs!

Onload has also has other nice features like accelerating machine-local stuff (pipes, unix sockets and other stuff).

[pclmulqdq]

I have found OpenOnload to be easier to use than VMA, although I think you can go a bit faster with Mellanox NICs.