linux笔记本过热调频控制算法+脚本

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linux笔记本过热调频控制算法+脚本

发布： 2012-08-11 18:46

由于笔记本几年没有除尘了，风扇降温效果非常差了，开几个软件可能出来过热死机。
使用几个调频软件一直没有设置成我需要的方式，只好自己先写一个简单的工具。

已测试系统; gentoo linux，arch linux。

调频软件包使用的新的调频包cpupower。

算法说明：
开始的时候使用laptop-mode的默认ondemand档
每隔１－２秒检测一下ＣＰＵ的温度，
如果没有超过９０度，忽略本次检测
如果超过９０度，转为userspace档，设定ＣＰＵ频率为最低
记录当前时间
如果低于６０度，如果是我们设置了固定的频率（使用记录时间值和当前的频率设定档是否是userspace检测）
则，返回到ondemand档
否则，忽略本次检测。
完成

附后;
查看ＣＰＵ温度:
cat /sys/devices/virtual/hwmon/hwmon0/temp1_input

关注最新版本脚本实现：http://nullfxp.googlecode.com/svn/vendor/myscripts/laphot_ctrl.sh

[code type="bash"]
#!/bin/sh

# usage: (start|stop|status|reset)

RTDIR_PREFIX=
PID_FILE=$RTDIR_PREFIX/var/run/laphot.pid
LOG_FILE=$RTDIR_PREFIX/var/log/laphot.log
LAST_SETFREQ_TIME_FILE=$RTDIR_PREFIX/var/tmp/laphot_last_setfreq_time.txt
STOP_FLAG_FILE=$RTDIR_PREFIX/var/tmp/laphot_stop.conf

COOL_HOLL=61000
HOT_HOLL=92000

RT_PID=$$

echo $RT_PID > $PID_FILE || exit 1;
echo "" > $LAST_SETFREQ_TIME_FILE || exit 2;
echo "" > $STOP_FLAG_FILE || exit 3;
echo "I'm ${USER}." | tee $LOG_FILE || exit 4;

while true
do
CUR_TIME=$(date)
echo $CUR_TIME | tee -a $LOG_FILE

CUR_TEMP=$(cat /sys/devices/virtual/hwmon/hwmon0/temp1_input)
echo $CUR_TEMP | tee -a $LOG_FILE

if [ $CUR_TEMP -lt $COOL_HOLL ] ; then
# up
last_setfreq_time=$(cat $LAST_SETFREQ_TIME_FILE)
if [ x"$last_setfreq_time" = x"" ] ; then
echo "Cool state ${CUR_TEMP}, Not need any op" | tee -a $LOG_FILE
true
else
#
echo "" > $LAST_SETFREQ_TIME_FILE
# set freq to ondemand
echo "Set to ondemand mode, go to nice performance mode." | tee -a $LOG_FILE
cpupower frequency-set --min 800MHz --max 2820MHz | tee -a $LOG_FILE
cpupower frequency-set --governor ondemand | tee -a $LOG_FILE

echo "SET ondemangovernor, set max_freq." | tee -a $LOG_FILE
FREQ_INFO=$(cpupower frequency-info)
echo $FREQ_INFO | tee -a $LOG_FILE
echo "" | tee -a $LOG_FILE
echo "" | tee -a $LOG_FILE
fi
elif [ $CUR_TEMP -gt $HOT_HOLL ] ; then
last_setfreq_time=$(cat $LAST_SETFREQ_TIME_FILE)
if [ x"$last_setfreq_time" = x"" ] ; then
# down
echo $CUR_TIME > $LAST_SETFREQ_TIME_FILE
# set freq to usespace
# set freq to min_freq

echo "Set to userspace mode, go to cooler mode." | tee -a $LOG_FILE

#cpupower frequency-set --governor userspace | tee -a $LOG_FILE
#cpupower frequency-set --min 800MHz --max 800MHz | tee -a $LOG_FILE
#cpupower frequency-set --freq 800MHz | tee -a $LOG_FILE

cpupower frequency-set --min 800MHz --max 1600MHz | tee -a $LOG_FILE
cpupower frequency-set --governor ondemand | tee -a $LOG_FILE

echo "SET userspace governor, set min_freq." | tee -a $LOG_FILE
FREQ_INFO=$(cpupower frequency-info)
echo $FREQ_INFO | tee -a $LOG_FILE
echo "" | tee -a $LOG_FILE
echo "" | tee -a $LOG_FILE
else
echo "Already set min freq. continue." | tee -a $LOG_FILE
fi
else
echo "Good nice porformane state: ${CUR_TEMP}, Not need any op." | tee -a $LOG_FILE
true
fi

sleep 2;
done

# cat /etc/rc.local
# if [ x"$USER" = x"root" ] ; then
# /root/bin/laphot_ctrl.sh > /dev/null &
# elif [ x"$USER" = x"" ] ; then
# /root/bin/laphot_ctrl.sh > /dev/null &
# else
# true
# fi

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原文： http://qtchina.tk/?q=node/673