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//proc/self/root/proc/self/root/etc/rc.d/init.d/cpuspeed
#!/bin/sh # the following is the LSB init header see # http://www.linux-foundation.org/spec//booksets/LSB-Core-generic/LSB-Core-generic.html#INITSCRCOMCONV # ### BEGIN INIT INFO # Provides: cpuspeed # Should-Start: # Default-Start: 1 2 3 4 5 # Short-Description: processor frequency scaling support # Description: This script enables/disables processor frequency # scaling support, either using the cpuspeed daemon # or in-kernel frequency scaling support ### END INIT INFO # the following is the chkconfig init header # # cpuspeed: processor frequency scaling support # # chkconfig: 12345 13 99 # description: Run dynamic CPU speed daemon and/or load appropriate # cpu frequency scaling kernel modules and/or governors # # Source function library. . /etc/rc.d/init.d/functions prog="cpuspeed" [ -f /usr/sbin/$prog ] || exit 5 # Get config. if [ -f /etc/sysconfig/$prog ]; then . /etc/sysconfig/$prog fi cpu0freqd=/sys/devices/system/cpu/cpu0/cpufreq globfreq='/sys/devices/system/cpu' cpufreq="${globfreq}/cpufreq" cpus="${globfreq}/cpu[0-9]*" testpat="${cpus}/cpufreq/scaling_driver" lockfile="/var/lock/subsys/$prog" xendir="/proc/xen" logger="/usr/bin/logger -p info -t $prog" IGNORE_NICE=${IGNORE_NICE:-0} module_loaded=false some_file_exist() { while [ "$1" ] ; do [ -f "$1" ] && return 0 shift done return 1 } governor_is_module() { # Check to see if the requested cpufreq governor # is provided as a kernel module or not module_info=`/sbin/modinfo cpufreq-${governor} > /dev/null 2>&1` return $? } is_p4_clockmod() { if [ `/sbin/lsmod | grep -c -w "p4.clockmod"` -ge 1 -a -d "/sys/devices/system/cpu/cpu0/thermal_throttle" ]; then return 0 fi return 1 } governor_module_loaded() { # Check to see if we have a module loaded for # the current cpufreq governor if [ -e ${cpu0freqd}/scaling_governor ]; then governor=`cat ${cpu0freqd}/scaling_governor` else governor="none" fi if [ "${governor}" != "none" -a `/sbin/lsmod | grep -c -w "cpufreq.${governor}"` -ge 1 ]; then return 0 fi return 1 } adjust_cpufreq() { # First arg is a param under $cpu/cpufreq/ # Second arg is the value you want to set that param to if $(echo ${1} | grep -qE '(threshold|ignore_nice_load)'); then [ -f $cpufreq/$1 ] && echo $2 > $cpufreq/$1 else for cpu in ${cpus}; do [ -f $cpu/cpufreq/$1 ] && echo $2 > $cpu/cpufreq/$1 done fi } start_cpuspeed() { echo -n $"Starting $prog: " # cpuspeed daemon thresholds are specified as idle percentages, # cpufreq modules as busy percentages, so we need to do some # math here for use of unified config... # DOWN_THRESHOLD doesn't mean exactly the same thing for # cpuspeed as it does for the cpufreq governors, but close # enough, and if not specified, we use same defaults as governors. if [ -n "$UP_THRESHOLD" ]; then let UP_THRESHOLD=100-$UP_THRESHOLD else UP_THRESHOLD=20 fi if [ -n "$DOWN_THRESHOLD" ]; then let DOWN_THRESHOLD=100-$DOWN_THRESHOLD else DOWN_THRESHOLD=80 fi OPTS="$OPTS -r -p $UP_THRESHOLD $DOWN_THRESHOLD" if [ -n "$MIN_SPEED" ]; then OPTS="$OPTS -m $MIN_SPEED" fi if [ -n "$MAX_SPEED" ]; then OPTS="$OPTS -M $MAX_SPEED" fi if [ "$IGNORE_NICE" -eq 0 ]; then OPTS="$OPTS -n" fi daemon $prog -d $OPTS RETVAL=$? return $RETVAL } stop_cpuspeed() { if [ -n "`pidof $prog`" ]; then echo -n $"Stopping $prog: " killproc $prog -USR1 killproc $prog -INT fi if [ -n "`pidof $prog`" ]; then killproc $prog fi RETVAL=$? return $RETVAL } start() { if [ $(id -u) -ne 0 ]; then echo -n "Insufficient privileges to start cpuspeed service: " failure; echo return 4 fi if [ ! -f $lockfile ] && [ ! -d "$xendir" ]; then cpu_vendor=$(awk '/vendor_id/{print $3}' /proc/cpuinfo | tail -n 1) cpu_family=$(awk '/cpu family/{print $4}' /proc/cpuinfo | tail -n 1) if ! some_file_exist $testpat ; then # Attempt to load scaling_driver if not loaded # but it is configured if [ -n "$DRIVER" ]; then /sbin/modprobe "$DRIVER" elif [ -d /proc/acpi ]; then /sbin/modprobe pcc-cpufreq 2> /dev/null if [ ! -d ${cpu0freqd} ]; then /sbin/modprobe -r pcc-cpufreq 2> /dev/null if [ "$cpu_vendor" == AuthenticAMD ] && [ "$cpu_family" -ge 7 ]; then # Try loading powernow-k8 if this is an AMD processor, # family 7 or greater (Athlon XP/MP was family 6) pk8m=$(/sbin/modinfo powernow-k8 > /dev/null 2>&1) if [ "$?" -eq 0 ]; then /sbin/modprobe powernow-k8 2> /dev/null [ -d ${cpu0freqd} ] || /sbin/modprobe -r powernow-k8 2> /dev/null fi else # use ACPI as a fallback /sbin/modprobe acpi-cpufreq 2> /dev/null # if even ACPI didn't work, remove it # and then next test will bail out. [ -d ${cpu0freqd} ] || /sbin/modprobe -r acpi-cpufreq 2> /dev/null fi fi fi if [ ! -d ${cpu0freqd} -a "$cpu_vendor" == GenuineIntel ]; then # last-ditch effort for Intel proc boxes, try our neutered p4-clockmod # to get at least passive cooling support (no clock changes) /sbin/modprobe p4-clockmod 2> /dev/null [ -d ${cpu0freqd} ] || /sbin/modprobe -r p4-clockmod 2> /dev/null fi fi # If we get this far with no driver, we must have no scaling. # We're doomed. [ ! -f ${cpu0freqd}/scaling_driver ] && return 6 # Okay, we have a driver, carry on... drv=`cat ${cpu0freqd}/scaling_driver` # Figure out default governor to use case "$drv" in centrino|powernow-k8|pcc-cpufreq|acpi-cpufreq|e_powersaver) default_governor=ondemand ;; p4-clockmod) # not actually a governor, we want to bail without doing either # in-kernel scaling or starting up the cpuspeed daemon in this case default_governor=p4passive ;; intel_pstate) default_governor=powersave echo "CPU states managed by intel_pstate; use cpupower for configuration." $logger "CPU states managed by intel_pstate; use cpupower for configuration." ;; *) default_governor=userspace ;; esac governor=${GOVERNOR:-${default_governor}} if [ "${governor}" == "p4passive" ]; then echo -n "Enabling p4-clockmod driver (passive cooling only): " success; echo return 0 fi # Load governor module, if need be, and validate governor_is_module && /sbin/modprobe cpufreq-${governor} if [ `grep -c -w ${governor} ${cpu0freqd}/scaling_available_governors` -ge 1 ]; then $logger "Enabling ${governor} cpu frequency scaling governor" else $logger "Invalid governor \"${governor}\" specified, falling back to ${default_governor}" governor_is_module && /sbin/modprobe -r cpufreq-${governor} governor=${default_governor} governor_is_module && /sbin/modprobe cpufreq-${governor} fi # Set governor adjust_cpufreq scaling_governor ${governor} # Run cpuspeed daemon for userspace gov, kernel ones otherwise if [ "${governor}" == "userspace" ]; then start_cpuspeed RETVAL=$? else if [ -n "$MIN_SPEED" ]; then adjust_cpufreq scaling_min_freq $MIN_SPEED else adjust_cpufreq scaling_min_freq 0 fi if [ -n "$MAX_SPEED" ]; then adjust_cpufreq scaling_max_freq $MAX_SPEED else adjust_cpufreq scaling_max_freq `cat $cpu0freqd/cpuinfo_max_freq` fi if [ -n "$UP_THRESHOLD" -a ${governor} == "ondemand" ]; then adjust_cpufreq ondemand/up_threshold $UP_THRESHOLD fi if [ -n "$DOWN_THRESHOLD" -a ${governor} == "conservative" ]; then adjust_cpufreq conservative/down_threshold $DOWN_THRESHOLD fi if [ "$IGNORE_NICE" -eq 1 -a ${governor} == "ondemand" -o ${governor} == "conservative" ]; then adjust_cpufreq ${governor}/ignore_nice_load $IGNORE_NICE fi echo -n "Enabling ${governor} cpu frequency scaling: " success RETVAL=0 fi echo # Technically, not quite right in non-cpuspeed daemon # cases, but close enough to indicate that we're # doing some sort of cpu frequency scaling. [ $RETVAL = 0 ] && touch $lockfile else if [ -d "$xendir" ]; then $logger "CPU Frequency scaling is currently not supported on xen kernels" fi return 0 fi return $RETVAL } stop() { if [ $(id -u) -ne 0 ]; then echo -n "Insufficient privileges to stop cpuspeed service: " failure; echo return 4 fi is_p4_clockmod && p4status="true" if [ "$p4status" == "true" -a "x${GOVERNOR}" == "x" ]; then echo "p4-clockmod passive cooling support cannot be truly stopped" fi [ ! -f ${cpu0freqd}/scaling_driver ] && return 0 drv=`cat ${cpu0freqd}/scaling_driver` governor_module_loaded && module_loaded=true if [ "${drv}" != "intel_pstate" -a "${governor}" != "userspace" ] || [ "${drv}" == "intel_pstate" -a "${governor}" != "powersave" ]; then echo -n "Disabling ${governor} cpu frequency scaling: " $logger "Disabling ${governor} cpu frequency scaling governor" for cpu in ${cpus}; do if [ "${drv}" == "intel_pstate" ]; then echo powersave > $cpu/cpufreq/scaling_governor else echo userspace > $cpu/cpufreq/scaling_governor cat $cpu/cpufreq/cpuinfo_max_freq > $cpu/cpufreq/scaling_setspeed fi done if [ $module_loaded == true ]; then /sbin/modprobe -r cpufreq-${governor} fi success RETVAL=0 else stop_cpuspeed RETVAL=$? fi echo [ -n "$DRIVER" ] && /sbin/modprobe -r $DRIVER [ $RETVAL = 0 ] && RETVAL=$? [ $RETVAL = 0 ] && rm -f $lockfile return $RETVAL } reload() { if [ $(id -u) -ne 0 ]; then echo -n "Insufficient privileges to stop cpuspeed service: " failure; echo return 4 fi governor_module_loaded && module_loaded=true if [ "${governor}" == "userspace" ]; then failure; echo return 3 else if [ -n "$MIN_SPEED" ]; then adjust_cpufreq scaling_min_freq $MIN_SPEED fi if [ -n "$MAX_SPEED" ]; then adjust_cpufreq scaling_max_freq $MAX_SPEED fi if [ -n "$UP_THRESHOLD" -a ${governor} == "ondemand" ]; then adjust_cpufreq ondemand/up_threshold $UP_THRESHOLD fi if [ -n "$DOWN_THRESHOLD" -a ${governor} == "conservative" ]; then adjust_cpufreq conservative/down_threshold $DOWN_THRESHOLD fi if [ "$IGNORE_NICE" -eq 1 -a ${governor} == "ondemand" -o ${governor} == "conservative" ]; then adjust_cpufreq ${governor}/ignore_nice_load $IGNORE_NICE fi echo -n "Reloading configuration for ${governor}: " success; echo return 0 fi } case "$1" in start) start ;; stop) stop ;; status) is_p4_clockmod && p4status="true" if [ "$p4status" == "true" -a "x${GOVERNOR}" == "x" ]; then echo "p4-clockmod passive cooling is enabled" exit 0 fi governor_module_loaded && module_loaded=true if [ -d "$xendir" ]; then echo "Frequency scaling not supported under xen kernels" RETVAL=0 elif [ $module_loaded == true -o ${governor} == "performance" ]; then echo "Frequency scaling enabled using ${governor} governor" RETVAL=0 else status $prog RETVAL="$?" fi ;; restart|force-reload) stop start ;; reload) reload ;; condrestart|try-restart) governor_module_loaded && module_loaded=true if [ $module_loaded == true -o -n "`pidof $prog`" -o ${governor} == "performance" ]; then stop start fi ;; *) echo $"Usage: $0 {start|stop|restart|condrestart|status}" exit 2 ;; esac exit $RETVAL
