option FIB_ALGO and dpdk_lpm4

[Alexander V. Chernikov]

08.02.2021, 14:33, "Marek Zarychta" <zarychtam at plan-b.pwste.edu.pl>:
> W dniu 08.02.2021 o 13:10, mike tancsa pisze:
>>  I have been setting up some tests to see if
>>
>>  option FIB_ALGO and dpdk_lpm4.ko
>>
>>  will help with my pkt forwarding needs and large routing tables. So far so good. But one thing I noticed, is that its very chatty to dmesg.
>>  eg
>>  alloc_nhgrp: new mpath group: num_nhops: 2
>>  compile_nhgrp: O: 2/2
>>  compile_nhgrp: OO[0]: 1/1 curr=1 slot_idx=0
>>  compile_nhgrp: OO[1]: 0/0 curr=1 slot_idx=1
>>  alloc_nhgrp: new mpath group: num_nhops: 2
>>  compile_nhgrp: O: 2/2
>>  compile_nhgrp: OO[0]: 1/1 curr=1 slot_idx=0
>>  compile_nhgrp: OO[1]: 0/0 curr=1 slot_idx=1
>>  alloc_nhgrp: new mpath group: num_nhops: 2
>>  compile_nhgrp: O: 2/2
>>  compile_nhgrp: OO[0]: 1/1 curr=1 slot_idx=0
>>  compile_nhgrp: OO[1]: 0/0 curr=1 slot_idx=1
>>
>>  are these debugging messages that forgot to be turned off ? What do they mean ?
>>  Thanks for this work!
>>
>>  13.0-STABLE #11 stable/13-cc1352c1f-dirty
>
> Thank you for sharing this Mike. Could you please reveal us how do you
> feed your routing tables? Is net/bird{,2} or net/frr7 involved? Any
> problems or hints to make the routing daemon working with new routing stack?
Non-multipath should work as before, multipath works for quagga/frr but needs some patches for bird.
>
> The new routing stack looks very promising, please let me also give this
> way some appreciations to melifaro@ and other people who worked on it.
>
> I was also trying to test it with legacy net/bird and multiple fib
> tables, but I was early hit by: "KRT: Error sending route x.x.x.x/y to
> kernel: Operation not supported"
Any chance you could clarify what are these routes? "Operation not supported" looks a bit weird, it shouln't happen.
> Setting net.add_net.add_addr_allfibs=1addr_allfibs=1 changed it a bit,
> but still some blackhole /32 routes seem to get rejected.
Just "blackhole" route in the bird config? /32 or all?
>
> --
> Marek Zarychta