Optimize max RX/TX for ixgbe with ethtool on bond interfaces

Optimize-nics.sh

#!/bin/bash
### BEGIN INIT INFO
# Provides:          optimize-nics
# Required-Start:    $network
# Required-Stop:
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# chkconfig: 2345 98 90
# Short-Description: Enable optimization of NICs RX/TX
# Description:       Sets RX/TX to maximum, to improve
#                    network performance and decrease drops counters.
### END INIT INFO

# Source function library.
. /etc/rc.d/init.d/functions
INTERFACES="bond0 bond1"
LOCK_FILE=/tmp/.optimize-nics.lock
PATH="/sbin:/usr/sbin:/bin:/usr/bin:/usr/local/bin:/usr/local/sbin:$PATH"
export PATH
[ -f /etc/sysconfig/cedato-optimize-nics ] && . /etc/sysconfig/cedato-optimize-nics

case "$1" in
    start)
        if [ -e "$LOCK_FILE" ];then
          echo  "Already applied"
          success $"Already applied" 
          exit 0
        fi
          
        for bond_int in $(echo $INTERFACES);do
          if [[ -e  "/sys/class/net/$bond_int/bonding/slaves" ]];then
            echo -n $"Starting optimization on $bond_int: "
            is_updated=""
            for en in `cat /sys/class/net/$bond_int/bonding/slaves 2> /dev/null`;do 
              # check if ixgbe
              ethtool -i $en|grep -q ixgbe
              if [[ $? -ne 0 ]];then
                echo ""
                echo -n "Unsupported interface driver "
                success  $"Nic $en" 
                continue
              fi

               update_str=""
               max_rx=$(ethtool -g $en|awk '/^RX:/ {print$2}'|tr '\n' ' '|awk '{print $1}')
               curr_rx=$(ethtool -g $en|awk '/^RX:/ {print$2}'|tr '\n' ' '|awk '{print $2}')
               
               [[ ${curr_rx} -lt ${max_rx}  ]] && update_str="rx ${max_rx}"
               max_tx=$(ethtool -g $en|awk '/^TX:/ {print$2}'|tr '\n' ' '|awk '{print $1}')
               curr_tx=$(ethtool -g $en|awk '/^TX:/ {print$2}'|tr '\n' ' '|awk '{print $2}')
               [[ ${curr_tx} -lt ${max_tx}  ]] && update_str="$update_str tx ${max_tx}"
               
               if [[ "$update_str" != "" ]];then
                  is_updated="${is_updated}$update_str"
                  ethtool -G $en $update_str && success $"Nic $en" || failure $"Nic $en"
                  RETVAL=$?
                  [ $RETVAL -ne 0 ] && exit $RETVAL
              fi
              [[ "$is_updated" = "" ]] && success
            done
          fi
        done
        touch "$LOCK_FILE" 
        success
        echo
        exit 0
    ;;
    stop)      
      success
    ;;
    status)
      if [ -e "$LOCK_FILE" ];then
        echo "Running"
      else
          echo "Stopped"
          exit 1
      fi     
    ;;
    *)
    echo "Usage: $0 {start|stop|restart|status}"
    exit 1
    ;;

esac
exit 0