diff options
| author | Nikolay Aleksandrov <razor@blackwall.org> | 2026-09-30 10:14:11 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2026-10-02 12:42:11 -0700 |
| commit | f1829618e0ad2d5ff974b5d6f295b897e301cda6 (patch) | |
| tree | 92b2978f6386a34e297b074e6eb229e8aa6493ed /tools/lib/python/kdoc/python_version.py | |
| parent | 8533e9b85bd23e6c8ab0e9c3f2d5574d1a33c1b8 (diff) | |
net: bridge: fdb: avoid VLAN lookups in unicast forwarding
Pass the complete fdb destination to br_forward(). The tagged value is
decoded once into br_fwd_dst on entry so all subsequent forwarding checks
use the decoded port and VLAN. A cached port-VLAN is then used to avoid two
VLAN hash lookups in the standard unicast forwarding path. A backup-port
redirect also uses a raw destination because the cached VLAN belongs to the
original port.
[1] 64 byte vlan packets, 4k randomized fdb hits with 4k fdbs, 5 million
packets passed 5 times for every case
VIDs Ports Mpps Gbps CPU1 cycles/input
before after gain before after before after reduction
64 8/2 2.375486 2.635811 11.0% 1.216 1.350 1724.6 1553.7 9.9%
64 8/4 2.376731 2.636459 10.9% 1.217 1.350 1714.8 1554.7 9.3%
64 8/8 2.376621 2.635783 10.9% 1.217 1.350 1722.6 1553.2 9.8%
64 32/2 2.375876 2.637897 11.0% 1.216 1.351 1726.7 1552.3 10.1%
64 32/16 2.376442 2.636426 10.9% 1.217 1.350 1721.3 1554.2 9.7%
64 32/32 2.376763 2.636268 10.9% 1.217 1.350 1726.8 1553.5 10.0%
64 64/2 2.375678 2.638707 11.1% 1.216 1.351 1725.0 1552.1 10.0%
64 64/32 2.376681 2.637359 11.0% 1.217 1.350 1725.1 1555.9 9.8%
64 64/64 2.376787 2.638396 11.0% 1.217 1.351 1722.8 1550.9 10.0%
1024 8/2 2.263768 2.498881 10.4% 1.159 1.279 1808.5 1637.1 9.5%
1024 8/4 2.264519 2.499075 10.4% 1.159 1.280 1807.6 1638.8 9.3%
1024 8/8 2.263551 2.499231 10.4% 1.159 1.280 1812.0 1640.2 9.5%
1024 32/2 2.263841 2.499120 10.4% 1.159 1.280 1806.8 1639.6 9.3%
1024 32/16 2.263990 2.499562 10.4% 1.159 1.280 1806.1 1639.2 9.2%
1024 32/32 2.263719 2.498905 10.4% 1.159 1.279 1807.7 1639.3 9.3%
1024 64/2 2.263635 2.501889 10.5% 1.159 1.281 1809.4 1635.6 9.6%
1024 64/32 2.264467 2.500359 10.4% 1.159 1.280 1806.5 1633.0 9.6%
1024 64/64 2.240494 2.470246 10.3% 1.147 1.265 1810.0 1637.1 9.6%
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://patch.msgid.link/20260930071411.2786201-13-razor@blackwall.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'tools/lib/python/kdoc/python_version.py')
0 files changed, 0 insertions, 0 deletions