[PATCH v2] lpm: improve performance with copious IPv4 peering routes

[David Marchand]

Hello Jeffrey,

On Fri, Nov 10, 2023 at 12:11 AM Warrington, Jeffrey
<jwarrington at verisign.com> wrote:
>
> Minimize the performance impact of large numbers of BGP peering
> routes by updating LPM's IPv4 code to use a hash like the IPv6 code.
>
> Co-authored-by: Julien Charbon <jcharbon at verisign.com>
> Signed-off-by: Julien Charbon <jcharbon at verisign.com>
> Signed-off-by: Jeff Warrington <jwarrington at verisign.com>
> Co-authored-by: Nicolas Witkowski <nwitkowski at verisign.com>
> Signed-off-by: Nicolas Witkowski <nwitkowski at verisign.com>
> Co-authored-by: Rohit Gupta <rogupta at verisign.com>
> Signed-off-by: Rohit Gupta <rogupta at verisign.com>

Thanks for the patch.

Cc: lpm maintainers.
Don't forget to Cc: maintainers when sending patches.
You can simply pass --cc-cmd devtools/get-maintainer.sh to git send-email.


Can you provide performance numbers?


After this patch, LPM and LPM6 implementations become close.
Did you consider refactoring so that LPM and LPM6 can share more code?


> ---
>  lib/lpm/rte_lpm.c | 306 ++++++++++++++++++++++------------------------
>  lib/lpm/rte_lpm.h |   6 +

Seeing how no other .c is touched and no exposed symbol use it,
exposing the rte_lpm_rule_key structure in the public API is unneeded.

>  2 files changed, 149 insertions(+), 163 deletions(-)


-- 
David Marchand