[dpdk-dev] rte_lpm4 with expanded next hop support now available

[Matthew Hall]

Hello,

Based on the wonderful assistance from Vladimir and Stephen and a close friend of mine that is a hypervisor developer who helped me reverse engineer and rewrite rte_lpm_lookupx4, I have got a known-working version of rte_lpm4 with expanded 24 bit next hop support available here:

https://github.com/megahall/dpdk_mhall/tree/megahall/lpm-expansion

I'm going to be working on rte_lpm6 next, it seems to take a whole ton of memory to run the self-test, if anybody knows how much that would help, as it seems to run out when I tried it.

Sadly this change is not ABI compatible or performance compatible with the original rte_lpm because I had to hack on the bitwise layout to get more data in there, and it will run maybe 50% slower because it has to access some more memory.

Despite all this I'd really like to do the right thing find a way to contribute it back, perhaps as a second kind of rte_lpm, so I wouldn't be the only person using it and forking the code when I already met several others who needed it. I could use some ideas how to handle the situation.

Matthew.