Balance interrupts across cpu cores on TP-Link Archer C2600 or similar

rc.local

# Put your custom commands here that should be executed once
# the system init finished. By default this file does nothing.

set_smp_affinity() {
  local NR=0
  local CPU=1
  local ETHIRQS=`cat /proc/interrupts | grep "eth[0-9]" | cut -d: -f1`
  local PCIIRQS=`cat /proc/interrupts | grep "qcom-pcie-msi" | cut -d: -f1`
  local USBIRQS=`cat /proc/interrupts | grep "usb" | cut -d: -f1`
  local IRQS="$ETHIRQS $PCIIRQS $USBIRQS"

  for I in $IRQS; do
    if [ `expr $NR % 2` -eq 0 ]; then
      CPU=1
    else
      CPU=2
    fi

    echo $CPU > "/proc/irq/$I/smp_affinity"

    NR=`expr $NR + 1`
  done
}
set_smp_affinity

exit 0