[PATCH 0/2] fib: fix and speed up RVV lookup

[Thomas Monjalon]

05/10/2026 09:04, Sun Yuechi:
> Patch 1 fixes wrong next hops from a FIB created with
> RTE_FIB_F_LOOKUP_NETWORK_ORDER on RISC-V: the vector lookup read the
> addresses in host order.
> 
> Patch 2 removes a register spill from the vector lookup loop by
> gathering the entries at the width they are stored with.
> 
> Patch 2, ns per lookup, standalone benchmark, tables in cache, -O3:
> 
>                     1B     2B     4B     8B
>   SpacemiT X60
>     before         31.1   32.1   30.6   29.7
>     after          27.2   27.9   27.6   26.4
>   Sophgo SG2044
>     before          5.6    5.7    5.9    7.5
>     after           4.4    4.1    5.0    6.0
>   SpacemiT X100
>     before          4.7    4.8    4.8    5.9
>     after           4.1    4.2    4.3    5.1
> 
> fib_perf_autotest, whose addresses miss the cache, gains 0 to 14%.
> 
> Sun Yuechi (2):
>   fib: fix lookup in network order with RVV
>   fib: gather entries at their own width with RVV

Applied, thanks.