openwrt/target/linux/bcm4908/base-files/etc/init.d/fastnetwork

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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: fcbd39689ebfe ("bcm53xx: enable & setup packet steering") Signed-off-by: Rafał Miłecki <rafal@milecki.pl> (cherry picked from commit 57cad53f4e52be987cdd61308ff7d2704baca539)
2022-07-28 15:46:33 +00:00
#!/bin/sh /etc/rc.common
START=25
USE_PROCD=1
start_service() {
reload_service
}
service_triggers() {
procd_add_reload_trigger "network"
procd_add_reload_trigger "firewall"
procd_add_reload_interface_trigger "lan"
}
reload_service() {
local packet_steering="$(uci -q get network.@globals[0].packet_steering)"
local num_cpus="$(grep -c "^processor.*:" /proc/cpuinfo)"
local flow_offloading="$(uci -q get firewall.@defaults[0].flow_offloading)"
local flow_offloading_hw="$(uci -q get firewall.@defaults[0].flow_offloading_hw)"
local rps_eth0=0
local rps_br_lan=0
[ "$num_cpus" -le 1 ] && return
[ "$packet_steering" = 1 ] && {
if [ ${flow_offloading_hw:-0} -gt 0 ]; then
# HW offloading
# Not implemented
:
elif [ ${flow_offloading:-0} -gt 0 ]; then
# SW offloading
# BCM4908 always reaches ~940 Mb/s
:
else
# Default
case "$num_cpus" in
2) rps_eth0=2; rps_br_lan=2;;
4) rps_eth0=e; rps_br_lan=e;;
esac
fi
}
echo $rps_eth0 > /sys/class/net/eth0/queues/rx-0/rps_cpus
echo $rps_br_lan > /sys/class/net/br-lan/queues/rx-0/rps_cpus
}