linux 系统硬件优化

/etc/do_some_checks.sh

#!/bin/sh

#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.


touch /var/lock/subsys/local
echo 10 >/sys/module/ipmi_si/parameters/kipmid_max_busy_us


bash /etc/do_some_checks.sh
/etc/balance_lvs_cpu.sh
bash /home/fastmedia/push_fastmedia.sh f01i01_fastmedia.conf start CLC
[root@cmb-cq-218-201-042-186 ~]# cat /etc/do_some_checks.sh
#!/bin/bash
# 本脚本用于优化系统


export PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
########## 基础信息获取 ##########
CORES=`awk '/processor/{p++};END{print p}' /proc/cpuinfo`
DISK_SYS=`mount |awk '$3=="/"{i=$1;gsub(/\/dev\//,"",i);gsub(/[0-9]/,"",i);}END{print i}'`
DISK_NUM=0
for i in sd{a..z}; do
    if [ -b "/dev/$i" ]; then
        let DISK_NUM++
        last_disk=$i
        [ "/dev/$DISK_SYS" == "/dev/$i" ] && continue # skip OS device.
        # SSD?
        if ( smartctl -i /dev/$i 2>/dev/null |grep -q "SSD\|Micron\|INTEL" ); then
            SSDs[$DISK_NUM]=$i
            continue
        fi
        if ( smartctl -i /dev/$i 2>/dev/null |egrep -q "(4[78][0-9]|800) GB" ); then
            SSDs[$DISK_NUM]=$i
            continue
        fi
        # DATA?
        DISKs[$DISK_NUM]=$i
    else
        break
    fi
done
########## 调整优化 ################
for disk in ${SSDs[*]} ; do echo noop     > /sys/block/$disk/queue/scheduler; done
for disk in ${DISKs[*]}; do echo deadline > /sys/block/$disk/queue/scheduler; done
# fastcache启动项
if grep -q /usr/local/fastcache/sbin/fastcache /etc/rc.d/rc.local; then
sed -i -r 's!(nice -n -3 )?/usr/local/fastcache/sbin/fastcache!/etc/init.d/fastcache start!' /etc/rc.d/rc.local 
fi
# tcp初始化窗口
ip route |grep default | while read p; do ip route change $p initcwnd 10 initrwnd 44; done; ip route
# 强制使用 cubic 拥塞控制算法
sysctl -w net.ipv4.tcp_congestion_control=cubic &>/dev/null
# 设置 CPU 始终工作在最高频率
for CPUFREQ in /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor; do [ -f $CPUFREQ ] || continue; echo -n performance > $CPUFREQ; done
# IPMI CPU高
[ -f /sys/module/ipmi_si/parameters/kipmid_max_busy_us ] && echo 10 >/sys/module/ipmi_si/parameters/kipmid_max_busy_us
#


# CPU
# 平均绑定CPU到网卡多个队列上，避免单核CPU跑满的问题
set_affinity()
{
        if [ $VEC -ge 32 ]
        then
                MASK_FILL=""
                MASK_ZERO="00000000"
                let "IDX = $VEC / 32"
                for ((i=1; i<=$IDX;i++))
                do
                        MASK_FILL="${MASK_FILL},${MASK_ZERO}"
                done


                let "VEC -= 32 * $IDX"
                MASK_TMP=$((1<<$VEC))
                MASK=`printf "%X%s" $MASK_TMP $MASK_FILL`
        else
                MASK_TMP=$((1<<$VEC))
                MASK=`printf "%X" $MASK_TMP`
        fi


    printf "%s mask=%s for /proc/irq/%d/smp_affinity\n" $DEV $MASK $IRQ
    printf "%s" $MASK > /proc/irq/$IRQ/smp_affinity
}


if ( service irqbalance status &>/dev/null ); then
    service irqbalance stop
    chkconfig irqbalance off
fi


# Set up the desired devices.
for DEV in `ifconfig | awk '$0~/^(eth|em)[0-9] /{print $1}'`; do
  for DIR in rx tx TxRx; do
     MAX=`grep $DEV-$DIR /proc/interrupts | wc -l`
     if [ "$MAX" == "0" ] ; then
       MAX=`egrep -i "$DEV-" /proc/interrupts | wc -l`
     fi
     if [ "$MAX" == "0" ] ; then
       MAX=`egrep -i "$DEV:.*$DIR" /proc/interrupts | wc -l`
     fi
     if [ "$MAX" == "0" ] ; then
       echo no $DIR vectors found on $DEV
       continue
     fi
     for VEC in `seq 0 1 $MAX`; do
        IRQ=`cat /proc/interrupts | grep -i $DEV-$DIR-$VEC"$"  | cut  -d:  -f1 | sed "s/ //g"`
        if [ -z $IRQ ]; then
           IRQ=`cat /proc/interrupts | grep -i $DEV-$VEC"$"  | cut  -d:  -f1 | sed "s/ //g"`
        fi
        if [ -n  "$IRQ" ]; then
          set_affinity
        else
           IRQ=`cat /proc/interrupts | egrep -i $DEV:v$VEC-$DIR"$"  | cut  -d:  -f1 | sed "s/ //g"`
           if [ -n  "$IRQ" ]; then
             set_affinity
           fi
        fi
     done
  done
done