Re: [dpdk-dev] announcing rump kernel TCP/IP stack for DPDK

[Antti Kantee <pooka@iki.fi>]

Vincent,

On 23.05.2013 21:52, Vincent JARDIN wrote:
> We had to develop a complete logic from scratch (aka fast path logic) to
> get a TCP/IP stack with good performances for 6WIND (including some
> Openflow switching). Unfortunately, as part of our DPDK opensource
> contribution, we do not plan to publish under open source our 6WINDGate
> stack (yet).

I'm under no illusion that making things really fast will be trivial 
work.  If it were, the world would be full of fast TCP/IP stacks ;)

> However, you are very welcomed to introduce a TCP/IP stack for the DPDK.
> What kind of support/benchmark did you run? Would you like to get it
> mainstream into the DPDK?

Our test was simple: DHCP and port 80 "GET /".  Since the TCP/IP stack 
and rump kernel themselves are solid, it's been my experience that once 
the above works, everything works even full blast.

I don't have hardware, but the other party I mentioned in my original 
mail wanted to benchmark, so hopefully we'll have some netperf numbers 
soon.  Based on prior experience, I expect some Gbps throughput on a 10G 
without optimizing, but we'll see.

I think currently integration makes sense only as some sort of a 
"reachover", i.e. source is not imported into the DPDK tree, but rather 
fetched on demand.  I'm happy with the current state, but if someone 
wants to work on a reachover solution, I'll be happy to assist, though 
not drive the effort.  Eventually integration may become more pertinent 
as different optimizations demand radically different code, but let's 
think about that if/when we get there.

br,
   antti