enable rps/rfs on centos6

enable_rps.sh

#!/bin/bash

VAL_RPS_FLOW_CNT="32768"
VAL_RPS_SOCK_FLOW_ENTRIES="32768"

PROC_NUM=$(cat /proc/cpuinfo | grep -c ^processor)
VAL_RPS_CPUS=0

if [ ${PROC_NUM:?} -eq 1 ]
then
  echo "RPS/RFS disabled because of single cpu."
  exit 0
elif [ ${PROC_NUM:?} -le 3 ]
then
  ## 11(bit) = 3(0x3)
  VAL_RPS_CPUS=3
else
  ## 1111(bit) = f(0xf)
  VAL_RPS_CPUS="f"
fi

## RPS
FILES=$(ls /sys/class/net/*/queues/rx-*/rps_cpus)
for FILE in ${FILES}
do
  echo "${VAL_RPS_CPUS:?}" > "${FILE:?}"
done

## RFS
FILES=$(ls /sys/class/net/*/queues/rx-*/rps_flow_cnt)
for FILE in ${FILES}
do
  echo "${VAL_RPS_FLOW_CNT:?}" > "${FILE:?}"
done
sysctl -q -w net.core.rps_sock_flow_entries=${VAL_RPS_SOCK_FLOW_ENTRIES:?}

much smart way to persist settings are...

set attibute in /etc/udev/rules.d/70-persistent-net.rules

ATTR{queues/rx-0/rps_cpus}="f", ATTR{queues/rx-0/rps_flow_cnt}="32768",

set value in /etc/sysctl.conf

net.core.rps_sock_flow_entries = 32768

and reboot system.