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authorRafał Miłecki <rafal@milecki.pl>2022-07-28 17:46:33 +0200
committerRafał Miłecki <rafal@milecki.pl>2022-07-28 17:46:33 +0200
commit57cad53f4e52be987cdd61308ff7d2704baca539 (patch)
treed04fe7a2b59fc105013adf5cb50a773fa1045087
parenta49212d762fb2635564cd3365651da51d0c535d9 (diff)
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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>
-rwxr-xr-xtarget/linux/bcm4908/base-files/etc/init.d/fastnetwork46
-rw-r--r--target/linux/bcm4908/base-files/etc/uci-defaults/05_packet_steering3
2 files changed, 49 insertions, 0 deletions
diff --git a/target/linux/bcm4908/base-files/etc/init.d/fastnetwork b/target/linux/bcm4908/base-files/etc/init.d/fastnetwork
new file mode 100755
index 0000000000..88f6075990
--- /dev/null
+++ b/target/linux/bcm4908/base-files/etc/init.d/fastnetwork
@@ -0,0 +1,46 @@
+#!/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
+}
diff --git a/target/linux/bcm4908/base-files/etc/uci-defaults/05_packet_steering b/target/linux/bcm4908/base-files/etc/uci-defaults/05_packet_steering
new file mode 100644
index 0000000000..98c9497815
--- /dev/null
+++ b/target/linux/bcm4908/base-files/etc/uci-defaults/05_packet_steering
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+uci set network.@globals[0].packet_steering="1"