MTK平台控制CPU的脚本

最新推荐文章于 2024-12-25 15:16:52 发布

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#cpu #系统性能 #mtk #android #shell

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本文介绍了一种针对MTK6797平台的CPU性能调优脚本，通过控制不同核心的工作频率及在线状态实现系统性能与功耗平衡。脚本提供了max、min、normal和thermal等模式。

近日负责调整系统性能，对系统做了周身裁剪，包含APP，内核无关配置项，以及无关的so库等。。。

其次，硬件方面，我们使用的是MTK6797硬件平台，进入系统后，发现系统一般只开了一半的核数，而且并非高频运行，因此写了一个脚本来控制cpu的运行状态：

如下：

#!/system/bin/sh

# 0~3 max:1391000
# 4~7 max:1846000
# 8~9 max:2314000

#/sys/devices/system/cpu/cpu6/cpufreq/scaling_available_frequencies
cpu_base=/sys/devices/system/cpu
thermal_base=/sys/class/thermal

high_conf=/system/etc/.tp/.ht120.mtc
def_conf=/system/etc/.tp/thermal.conf
def_conf_bak=$def_conf.syn

function help_list() {
   echo -e "\r"
   echo "#####################################"
   echo "# help (display help list)"
   echo "# max (make all cpu fullspeed)"
   echo "# min (power save mode)"
   echo "# normal (make cpu at normal mode)"
   echo "# state (display cpu info)"
   echo "# thermal (higher thermal config)"
   echo "#####################################"
   echo -e "\r"
}

if [ $# -ne "1" ]; then
   help_list
   exit 1
fi

if [ $1 = "help" ]; then
   help_list;
   exit 0
elif [ $1 = "thermal" ]; then
   if [ -f $def_conf_bak ]; then
       echo "Already high temp mode"
       exit 0
   fi
echo "================cpu set=================="
   mount -o remount,rw /system

   cp $def_conf $def_conf_bak
   cp $high_conf $def_conf

   mount -o remount,ro /system
elif [ $1 = "max" ]; then
echo "================cpu set=================="
   for i in `seq 10`
   do
       ((i=$i-1))
#       ((j=$i+4))

#   if [ $i -eq "4" ]; then
#       echo "0" > $cpu_base/cpu$i/online
#   else
       echo "1" > $cpu_base/cpu$i/online
#       sleep 0.1
#   fi

       MAX_FREQ[$i]=`cat $cpu_base/cpu$i/cpufreq/scaling_available_frequencies | busybox awk -F ' ' '{print $1}'`

#       echo ${MAX_FREQ[$i]}

       echo "performance" > $cpu_base/cpu$i/cpufreq/scaling_governor
       echo "$MAX_FREQ[$i]" > $cpu_base/cpu$i/cpufreq/scaling_setspeed

       if [ $i -le "5" ]; then
           echo "0" > $cpu_base/cpu$i/online
       fi
       cpu4_state=`cat $cpu_base/cpu4/online`

       if [ $cpu4_state == "1" ]; then
           echo "0" > $cpu_base/cpu6/online
       fi
   done
elif [ $1 = "min" ]; then
echo "================cpu set=================="
   for i in `seq 2`
   do
       ((i=$i-1))
       echo "1" > $cpu_base/cpu$i/online
#       sleep 0.01
       echo "powersave" > $cpu_base/cpu$i/cpufreq/scaling_governor
   done

   for j in `seq 8`
   do
       ((j=$j+1))
       echo "0" > $cpu_base/cpu$j/online
#       sleep 0.01
   done
elif [ $1 = "normal" ]; then
echo "================cpu set=================="
   for i in `seq 5`
   do
       ((i=$i-1))
       echo "1" > $cpu_base/cpu$i/online
       echo "interactive" > $cpu_base/cpu$i/cpufreq/scaling_governor

       ((j=$i+5))
       echo "0" > $cpu_base/cpu$j/online
   done
elif [ $1 = "state" ]; then
   echo "###############################################"
   for i in `seq 10`
   do
        ((i=$i-1))

        online=`cat $cpu_base/cpu$i/online`
        if [ $online = "1" ];then
           echo "cpu $i ON temp:`cat $thermal_base/thermal_zone$i/temp` freq:`cat $cpu_base/cpu$i/cpufreq/scaling_cur_freq` mode:`cat $cpu_base/cpu$i/cpufreq/scaling_governor`"
        else
            echo "cpu $i OFF"
        fi
        #echo -e "\r"
   done
   echo "###############################################"
   exit 0
else
   help_list
   exit 1
fi

echo "================set finish================"
exit 0

目前max也就是开了四个核，开满了风扇效率不沾的话片子会重启。6797是4个1.4GHz+4个2.0GHz+2个2.4GHz。