cpufrequtils 와 governor 설정

$ cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor

ondemand

cpufrequtils를 삭제후 리부팅 하니 기본적으로 ondemand 인 것 같고

$ ll /etc/init.d/cpufrequtils

-rwxr-xr-x 1 root root 2489 May  6  2012 cpufrequtils

위의 경로에서 내용을 바꾸어 주면 기본 거버너가 변경/설정이 가능 한 듯.

$ cat /etc/init.d/cpufrequtils #!/bin/sh ### BEGIN INIT INFO # Provides:       cpufrequtils # Required-Start: $remote_fs loadcpufreq # Required-Stop: # Default-Start:  2 3 4 5 # Default-Stop: # Short-Description: set CPUFreq kernel parameters # Description: utilities to deal with CPUFreq Linux #       kernel support ### END INIT INFO # DESC="CPUFreq Utilities" PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin CPUFREQ_SET=/usr/bin/cpufreq-set CPUFREQ_INFO=/usr/bin/cpufreq-info CPUFREQ_OPTIONS="" # use lsb-base . /lib/lsb/init-functions # Which governor to use. Must be one of the governors listed in: #   cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors # # and which limits to set. Both MIN_SPEED and MAX_SPEED must be values # listed in: #   cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_available_frequencies # a value of 0 for any of the two variables will disabling the use of # that limit variable. # # WARNING: the correct kernel module must already be loaded or compiled in. # # Set ENABLE to "true" to let the script run at boot time. # # eg:   ENABLE="true" #       GOVERNOR="ondemand" #       MAX_SPEED=1000 #       MIN_SPEED=500 ENABLE="true" GOVERNOR="ondemand" MAX_SPEED="0" MIN_SPEED="0" check_governor_avail() {         info="/sys/devices/system/cpu/cpu0/cpufreq/scaling_available_governors"         if [ -f $info ] && grep -q "\<$GOVERNOR\>" $info ; then                 return 0;         fi         return 1; } [ -x $CPUFREQ_SET ] || exit 0 if [ -f /etc/default/cpufrequtils ] ; then         . /etc/default/cpufrequtils fi # if not enabled then exit gracefully [ "$ENABLE" = "true" ] || exit 0 if [ -n "$MAX_SPEED" ] && [ $MAX_SPEED != "0" ] ; then         CPUFREQ_OPTIONS="$CPUFREQ_OPTIONS --max $MAX_SPEED" fi if [ -n "$MIN_SPEED" ] && [ $MIN_SPEED != "0" ] ; then         CPUFREQ_OPTIONS="$CPUFREQ_OPTIONS --min $MIN_SPEED" fi if [ -n "$GOVERNOR" ] ; then         CPUFREQ_OPTIONS="$CPUFREQ_OPTIONS --governor $GOVERNOR" fi CPUS=$(cat /proc/stat|sed -ne 's/^cpu\([[:digit:]]\+\).*/\1/p') RETVAL=0 case "$1" in         start|force-reload|restart|reload)                 log_action_begin_msg "$DESC: Setting $GOVERNOR CPUFreq governor"                 if check_governor_avail ; then                         for cpu in $CPUS ; do                                 log_action_cont_msg "CPU${cpu}"                                 $CPUFREQ_SET --cpu $cpu $CPUFREQ_OPTIONS 2>&1 > /dev/null || \                                         RETVAL=$?                         done                         log_action_end_msg $RETVAL ""                 else                         log_action_cont_msg "disabled, governor not available"                         log_action_end_msg $RETVAL                 fi                 ;;         stop)                 ;;         *)                 echo "Usage: $0 {start|stop|restart|reload|force-reload}"                 exit 1 esac exit 0