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+#!/bin/sh
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+# Startup script for cpuspeed
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+#
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+# chkconfig: 12345 06 99
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+# description: Run dynamic CPU speed daemon and/or load appropriate
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+# cpu frequency scaling kernel modules and/or governors
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+
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+# Source function library.
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+. /etc/rc.d/init.d/functions
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+
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+[ -r /proc/cmdline ] && cmdline=$(cat /proc/cmdline)
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+if (strstr "$cmdline" nocpufreq) ; then exit 0 ; fi
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+
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+prog="cpuspeed"
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+
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+[ -f /usr/sbin/$prog ] || exit 5
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+
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+# Get config.
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+if [ -f /etc/$prog.conf ]; then
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+ . /etc/$prog.conf
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+fi
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+
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+cpufreqd=/sys/devices/system/cpu/cpufreq
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+cpu0freqd=/sys/devices/system/cpu/cpu0/cpufreq
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+cpus='/sys/devices/system/cpu/cpu[0-9]*'
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+testpat="${cpus}/cpufreq/scaling_driver"
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+lockfile="/var/lock/subsys/$prog"
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+xendir="/proc/xen"
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+logger="/usr/bin/logger -p info -t $prog"
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+IGNORE_NICE=${IGNORE_NICE:-0}
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+module_loaded=false
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+
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+some_file_exist() {
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+ while [ "$1" ] ; do
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+ [ -f "$1" ] && return 0
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+ shift
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+ done
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+ return 1
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+}
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+
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+governor_is_module() {
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+ # Check to see if the requested cpufreq governor
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+ # is provided as a kernel module or not
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+ module_info=`/sbin/modinfo cpufreq-${governor}`
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+ return $?
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+}
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+
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+is_p4_clockmod() {
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+ if [ `/sbin/lsmod | grep -c -w "p4.clockmod"` -ge 1 -a -d "/sys/devices/system/cpu/cpu0/thermal_throttle" ]; then
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+ return 0
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+ fi
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+ return 1
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+}
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+
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+governor_module_loaded() {
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+# Check to see if we have a module loaded for
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+# the current cpufreq governor
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+ if [ -e ${cpu0freqd}/scaling_governor ]; then
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+ governor=`cat ${cpu0freqd}/scaling_governor`
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+ else
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+ governor="none"
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+ fi
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+ if [ "${governor}" != "none" -a `/sbin/lsmod | grep -c -w "cpufreq.${governor}"` -ge 1 ]; then
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+ return 0
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+ fi
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+ return 1
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+}
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+
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+adjust_cpufreq() {
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+ # First arg is a param under $cpufreqd
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+ # Second arg is the value you want to set that param to
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+ echo $2 > $cpufreqd/$1
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+}
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+
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+adjust_governor() {
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+ # First arg is a param under $cpu/cpufreq/
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+ # Second arg is the value you want to set that param to
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+ for cpu in ${cpus}; do
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+ echo $2 > $cpu/cpufreq/$1
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+ done
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+}
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+
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+start_cpuspeed() {
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+ echo -n $"Starting $prog: "
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+ # cpuspeed daemon thresholds are specified as idle percentages,
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+ # cpufreq modules as busy percentages, so we need to do some
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+ # math here for use of unified config...
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+ # DOWN_THRESHOLD doesn't mean exactly the same thing for
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+ # cpuspeed as it does for the cpufreq governors, but close
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+ # enough, and if not specified, we use same defaults as governors.
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+ if [ -n "$UP_THRESHOLD" ]; then
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+ let UP_THRESHOLD=100-$UP_THRESHOLD
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+ else
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+ UP_THRESHOLD=20
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+ fi
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+ if [ -n "$DOWN_THRESHOLD" ]; then
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+ let DOWN_THRESHOLD=100-$DOWN_THRESHOLD
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+ else
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+ DOWN_THRESHOLD=80
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+ fi
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+ OPTS="$OPTS -p $UP_THRESHOLD $DOWN_THRESHOLD"
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+ if [ -n "$MIN_SPEED" ]; then
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+ OPTS="$OPTS -m $MIN_SPEED"
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+ fi
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+ if [ -n "$MAX_SPEED" ]; then
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+ OPTS="$OPTS -M $MAX_SPEED"
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+ fi
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+ if [ "$IGNORE_NICE" -eq 1 ]; then
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+ OPTS="$OPTS -n"
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+ fi
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+ daemon $prog -d $OPTS
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+ RETVAL=$?
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+ return $RETVAL
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+}
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+
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+stop_cpuspeed() {
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+ if [ -n "`pidof $prog`" ]; then
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+ echo -n $"Stopping $prog: "
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+ killproc $prog -USR1
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+ killproc $prog -INT
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+ fi
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+ if [ -n "`pidof $prog`" ]; then
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+ killproc $prog
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+ fi
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+ RETVAL=$?
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+ return $RETVAL
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+}
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+
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+start() {
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+ if [ ! -f $lockfile ] && [ ! -d "$xendir" ]; then
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+ cpu_vendor=$(awk '/vendor_id/{print $3}' /proc/cpuinfo | tail -n 1)
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+ cpu_family=$(awk '/cpu family/{print $4}' /proc/cpuinfo | tail -n 1)
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+ if ! some_file_exist $testpat ; then
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+ # Attempt to load scaling_driver if not loaded
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+ # but it is configured
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+ if [ -n "$DRIVER" ]; then
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+ /sbin/modprobe "$DRIVER"
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+ elif [ "$cpu_vendor" == AuthenticAMD ] && [ "$cpu_family" -ge 7 ]; then
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+ # Try loading powernow-k8 if this is an AMD processor,
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+ # family 7 or greater (Athlon XP/MP was family 6)
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+ pk8m=$(/sbin/modinfo powernow-k8 > /dev/null 2>&1)
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+ if [ "$?" -eq 0 ]; then
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+ /sbin/modprobe powernow-k8 2> /dev/null
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+ [ -d ${cpu0freqd} ] || /sbin/modprobe -r powernow-k8 2> /dev/null
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+ fi
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+ elif [ -d /proc/acpi ]; then
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+ # use ACPI as a fallback
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+ /sbin/modprobe acpi-cpufreq 2> /dev/null
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+ # if even ACPI didn't work, remove it
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+ # and then next test will bail out.
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+ [ -d ${cpu0freqd} ] || /sbin/modprobe -r acpi-cpufreq 2> /dev/null
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+ fi
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+ if [ ! -d ${cpu0freqd} -a "$cpu_vendor" == GenuineIntel ]; then
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+ # last-ditch effort for Intel proc boxes, try our neutered p4-clockmod
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+ # to get at least passive cooling support (no clock changes)
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+ /sbin/modprobe p4-clockmod 2> /dev/null
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+ if [ -d ${cpu0freqd} ]; then
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+ echo -n "Enabling p4-clockmod driver (passive cooling only): "
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+ success; echo
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+ return 0
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+ else
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+ /sbin/modprobe -r p4-clockmod 2> /dev/null
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+ fi
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+ fi
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+ fi
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+
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+ # If we get this far with no driver, we must have no scaling.
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+ # We're doomed.
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+ [ ! -f ${cpu0freqd}/scaling_driver ] && return 6
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+
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+ # Okay, we have a driver, carry on...
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+ drv=`cat ${cpu0freqd}/scaling_driver`
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+
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+ # Figure out default governor to use
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+ case "$drv" in
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+ centrino|powernow-k8|acpi-cpufreq|e_powersaver)
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+ default_governor=ondemand
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+ ;;
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+ *)
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+ default_governor=userspace
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+ ;;
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+ esac
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+ governor=${GOVERNOR:-${default_governor}}
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+
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+ # Load governor module, if need be, and validate
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+ governor_is_module && /sbin/modprobe cpufreq-${governor}
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+ if [ `grep -c -w ${governor} ${cpu0freqd}/scaling_available_governors` -ge 1 ]; then
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+ $logger "Enabling ${governor} cpu frequency scaling governor"
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+ else
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+ $logger "Invalid governor \"${governor}\" specified, falling back to ${default_governor}"
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+ governor_is_module && /sbin/modprobe -r cpufreq-${governor}
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+ governor=${default_governor}
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+ governor_is_module && /sbin/modprobe cpufreq-${governor}
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+ fi
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+
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+ # Set governor
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+ adjust_governor scaling_governor ${governor}
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+
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+ # Run cpuspeed daemon for userspace gov, kernel ones otherwise
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+ if [ "${governor}" == "userspace" ]; then
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+ start_cpuspeed
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+ RETVAL=$?
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+ else
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+ if [ -n "$MIN_SPEED" ]; then
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+ adjust_cpufreq scaling_min_freq $MIN_SPEED
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+ fi
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+ if [ -n "$MAX_SPEED" ]; then
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+ adjust_cpufreq scaling_max_freq $MAX_SPEED
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+ fi
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+ if [ -n "$UP_THRESHOLD" -a ${governor} == "ondemand" ]; then
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+ adjust_cpufreq ondemand/up_threshold $UP_THRESHOLD
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+ fi
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+ if [ -n "$DOWN_THRESHOLD" -a ${governor} == "conservative" ]; then
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+ adjust_cpufreq conservative/down_threshold $DOWN_THRESHOLD
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+ fi
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+ if [ "$IGNORE_NICE" -eq 1 -a ${governor} == "ondemand" -o ${governor} == "conservative" ]; then
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+ adjust_cpufreq ${governor}/ignore_nice_load $IGNORE_NICE
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+ fi
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+ echo -n "Enabling ${governor} cpu frequency scaling: "
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+ success
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+ RETVAL=0
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+ fi
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+ echo
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+ # Technically, not quite right in non-cpuspeed daemon
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+ # cases, but close enough to indicate that we're
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+ # doing some sort of cpu frequency scaling.
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+ [ $RETVAL = 0 ] && touch $lockfile
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+ else
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+ if [ -d "$xendir" ]; then
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+ $logger "CPU Frequency scaling is currently not supported on xen kernels"
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+ fi
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+ return 0
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+ fi
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+ return $RETVAL
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+}
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+
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+stop() {
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+ is_p4_clockmod && p4status="true"
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+ if [ "$p4status" == "true" ]; then
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+ echo "p4-clockmod passive cooling support cannot be stopped"
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+ return 0
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+ fi
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+ [ ! -f ${cpu0freqd}/scaling_driver ] && return 0
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+ drv=`cat ${cpu0freqd}/scaling_driver`
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+ governor_module_loaded && module_loaded=true
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+
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+ if [ "${governor}" != "userspace" ]; then
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+ echo -n "Disabling ${governor} cpu frequency scaling: "
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+ $logger "Disabling ${governor} cpu frequency scaling governor"
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+ for cpu in ${cpus}; do
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+ echo userspace > $cpu/cpufreq/scaling_governor
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+ cat $cpu/cpufreq/cpuinfo_max_freq > $cpu/cpufreq/scaling_setspeed
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+ done
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+ if [ $module_loaded == true ]; then
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+ /sbin/modprobe -r cpufreq-${governor}
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+ fi
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+ success
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+ RETVAL=0
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+ else
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+ stop_cpuspeed
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+ RETVAL=$?
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+ fi
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+ echo
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+ [ -n "$DRIVER" ] && /sbin/modprobe -r $DRIVER
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+ [ $RETVAL = 0 ] && RETVAL=$?
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+ [ $RETVAL = 0 ] && rm -f $lockfile
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+ return $RETVAL
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+}
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+
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+case "$1" in
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+ start)
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+ start
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+ ;;
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+
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+ stop)
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+ stop
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+ ;;
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+
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+ status)
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+ is_p4_clockmod && p4status="true"
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+ if [ "$p4status" == "true" ]; then
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+ echo "p4-clockmod passive cooling is enabled"
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+ exit 0
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+ fi
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+ governor_module_loaded && module_loaded=true
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+ if [ -d "$xendir" ]; then
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+ echo "Frequency scaling not supported under xen kernels"
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+ RETVAL=0
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+ elif [ $module_loaded == true -o ${governor} == "performance" ]; then
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+ echo "Frequency scaling enabled using ${governor} governor"
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+ RETVAL=0
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+ else
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+ status $prog
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+ RETVAL="$?"
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+ fi
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+ ;;
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+
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+ restart)
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+ stop
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+ start
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+ ;;
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+
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+ condrestart)
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+ governor_module_loaded && module_loaded=true
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+ if [ $module_loaded == true -o -n "`pidof $prog`" -o ${governor} == "performance" ]; then
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+ stop
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+ start
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+ fi
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+ ;;
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+
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+ *)
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+ echo $"Usage: $0 {start|stop|restart|condrestart|status}"
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+ exit 3
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+ ;;
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+esac
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+
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+exit $RETVAL
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