git: 19fdc2029768 - releng/13.0 - Fix dpdk/ldradix fib lookup algorithm preference calculation.

[Alexander V. Chernikov]

The branch releng/13.0 has been updated by melifaro:

URL: https://cgit.FreeBSD.org/src/commit/?id=19fdc202976854a973067edd5a3d0c1d13a03846

commit 19fdc202976854a973067edd5a3d0c1d13a03846
Author:     Alexander V. Chernikov <melifaro at FreeBSD.org>
AuthorDate: 2021-03-07 22:05:34 +0000
Commit:     Alexander V. Chernikov <melifaro at FreeBSD.org>
CommitDate: 2021-03-11 08:24:44 +0000

    Fix dpdk/ldradix fib lookup algorithm preference calculation.
    
    The current preference number were copied from IPv4 code,
     assuming 500k routes to be the full-view. Adjust with the current
     reality (100k full-view).
    
    Reported by:    Marek Zarychta <zarychtam at plan-b.pwste.edu.pl>
    Approved by:    re(gjb)
    
    (cherry picked from commit 8a25d3f6ce34b80fef5fd6a324da724c56ad94ed)
---
 sys/contrib/dpdk_rte_lpm/dpdk_lpm6.c | 4 ++--
 sys/netinet6/in6_fib_algo.c          | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/sys/contrib/dpdk_rte_lpm/dpdk_lpm6.c b/sys/contrib/dpdk_rte_lpm/dpdk_lpm6.c
index 250e3e1bde4a..17d35c16346d 100644
--- a/sys/contrib/dpdk_rte_lpm/dpdk_lpm6.c
+++ b/sys/contrib/dpdk_rte_lpm/dpdk_lpm6.c
@@ -129,8 +129,8 @@ rte6_get_pref(const struct rib_rtable_info *rinfo)
 		return (1);
 	else if (rinfo->num_prefixes < 1000)
 		return (rinfo->num_prefixes / 10);
-	else if (rinfo->num_prefixes < 500000)
-		return (100 + rinfo->num_prefixes / 3334);
+	else if (rinfo->num_prefixes < 100000)
+		return (100 + rinfo->num_prefixes / 667);
 	else
 		return (250);
 }
diff --git a/sys/netinet6/in6_fib_algo.c b/sys/netinet6/in6_fib_algo.c
index c9df9387af37..04d194273168 100644
--- a/sys/netinet6/in6_fib_algo.c
+++ b/sys/netinet6/in6_fib_algo.c
@@ -118,8 +118,8 @@ lradix6_get_pref(const struct rib_rtable_info *rinfo)
 
 	if (rinfo->num_prefixes < 10)
 		return (255);
-	else if (rinfo->num_prefixes < 100000)
-		return (255 - rinfo->num_prefixes / 394);
+	else if (rinfo->num_prefixes < 10000)
+		return (255 - rinfo->num_prefixes / 40);
 	else
 		return (1);
 }