ImmortalWrt/target/linux/bcm4908
Rafał Miłecki 57cad53f4e bcm4908: enable & setup packet steering
Without packet steering NAT masquarade speed on BCM4908 /jumps/ between
two speeds:
1. 826 Mb/s (±3 Mb/s)
2. 909 Mb/s (±8 Mb/s)
and it never reaches ~940 Mb/s.

Proper packet steering can improve it. Below are testing results for
running iperf TCP traffic from LAN to WAN. They were used to pick up
golden values.

┌──────────┬──────────┬───────────┐
│   eth0   │  br-lan  │   speed   │
│ rps_cpus │ rps_cpus │   [Mbps]  │
├──────────┼──────────┼───────────┤
│        0 │        0 │ 743 / 804 │
│        0 │        1 │ 738 / 821 │
│        0 │        2 │     ✓ 940 │
│        0 │        4 │     ✓ 938 │
│        0 │        8 │     ✓ 941 │
├──────────┼──────────┼───────────┤
│        1 │        0 │       829 │
│        1 │        1 │       829 │
│        1 │        2 │     ✓ 942 │
│        1 │        4 │     ✓ 941 │
│        1 │        8 │     ✓ 941 │
├──────────┼──────────┼───────────┤
│        2 │        0 │     ✓ 942 │
│        2 │        1 │       926 │
│        2 │        2 │     ✓ 942 │
│        2 │        4 │     ✓ 942 │
│        2 │        8 │     ✓ 941 │
├──────────┼──────────┼───────────┤
│        4 │        0 │     ✓ 941 │
│        4 │        1 │       925 │
│        4 │        2 │     ✓ 941 │
│        4 │        4 │     ✓ 941 │
│        4 │        8 │     ✓ 941 │
├──────────┼──────────┼───────────┤
│        8 │        0 │     ✓ 942 │
│        8 │        1 │       925 │
│        8 │        2 │     ✓ 941 │
│        8 │        4 │     ✓ 942 │
│        8 │        8 │     ✓ 942 │
└──────────┴──────────┴───────────┘

Ref: fcbd39689e ("bcm53xx: enable & setup packet steering")
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
2022-07-28 17:46:33 +02:00
..
base-files bcm4908: enable & setup packet steering 2022-07-28 17:46:33 +02:00
files-5.10/drivers/net/ethernet/broadcom bcm4908: prepare kernel 5.10 support 2021-11-03 12:08:40 +01:00
generic
image uboot-bcm4908: include SoC in output files 2022-07-25 18:13:12 +02:00
patches-5.10 bcm4908: backport bcmbca DT patches queued for 5.20 2022-07-20 20:04:50 +02:00
config-5.10 kernel: backport LEDs driver for BCMBCA devices 2022-07-17 18:44:41 +02:00
Makefile bcm4908: add uboot-envtools to default packages 2021-12-16 08:26:25 +01:00