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|
#!/bin/bash
###########################################################################
# #
# Powersave Daemon #
# #
# Copyright (C) 2004,2005 SUSE Linux Products GmbH #
# #
# Author(s): Holger Macht <hmacht@suse.de> #
# #
# This program is free software; you can redistribute it and/or modify it #
# under the terms of the GNU General Public License as published by the #
# Free Software Foundation; either version 2 of the License, or (at you #
# option) any later version. #
# #
# This program is distributed in the hope that it will be useful, but #
# WITHOUT ANY WARRANTY; without even the implied warranty of #
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU #
# General Public License for more details. #
# #
# You should have received a copy of the GNU General Public License along #
# with this program; if not, write to the Free Software Foundation, Inc., #
# 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA #
# #
###########################################################################
#
# powersaved: Powersave daemon
#
# chkconfig: 345 99 04
# description: This is a daemon for powermanagement. Powersaved support \
# trigger suspend2disk/ram and standby. It support cpufreq \
# scaling and many more functions to save power.
#
# processname: powersaved
# pidfile: /var/run/powersaved.pid
#
# Check for missing binaries (stale symlinks should not happen)
powersaved_BIN=/usr/sbin/powersaved
powersave_BIN=/usr/bin/powersave
ACPID_BIN=/usr/sbin/acpid
# this is the default set of acpi modules loaded if nothing is configured
DEFAULT_ACPI_MODULES="ac battery button fan processor thermal"
test -x $powersaved_BIN || exit 5
# Check for existence of needed config file and read it
CONFIG=/etc/powersave
test -r $CONFIG || exit 6
. $CONFIG/common
. $CONFIG/cpufreq
. $CONFIG/thermal
if test -e /etc/sysconfig/security; then
. /etc/sysconfig/security
fi
LOGGER="/usr/bin/logger -t rcpowersaved"
# source functions
. /etc/init.d/functions
OPTS=""
SYSFS_PATH="/sys/devices/system/cpu/cpu0/cpufreq"
function load_governors()
{
if [ ! -r $SYSFS_PATH ];then
$LOGGER Cannot load cpufreq governors - No cpufreq driver available
return 1
fi
read govs < $SYSFS_PATH/scaling_available_governors
case "$govs" in
*powersave*)
;;
*)
modprobe -q cpufreq_powersave >/dev/null 2>&1
[ $? != 0 ] && $LOGGER powersave cpufreq governor could not be loaded
;;
esac
case "$govs" in
*performance*)
;;
*)
modprobe -q cpufreq_performance >/dev/null 2>&1
[ $? != 0 ] && $LOGGER perfromance cpufreq governor could not be loaded
;;
esac
case "$govs" in
*userspace*)
;;
*)
modprobe -q cpufreq_userspace >/dev/null 2>&1
[ $? != 0 ] && $LOGGER userspace cpufreq governor could not be loaded
;;
esac
case "$govs" in
*ondemand*)
;;
*)
modprobe -q cpufreq_ondemand >/dev/null 2>&1
[ $? != 0 ] && $LOGGER ondemand cpufreq governor could not be loaded
;;
esac
return 0
}
start() {
checkpid $powersaved_BIN
RETVAL=$?
if [ $RETVAL = 0 ]; then
echo -n "daemon already running"
echo
return $RETVAL;
elif [ -e /var/run/powersaved.pid ];then
rm -f /var/run/powersaved.pid&> /dev/null
fi;
checkpid "cpufreqd" &>/dev/null
RETVAL=$?
if [ $RETVAL = 0 ]; then
echo -n "cpufreqd already running, stop it first and restart service"
echo
return $RETVAL
fi
ACPI_APM=`$powersave_BIN --apm-acpi`
if [ "$ACPI_APM" = "ACPI" ]; then
# set thermal polling frequency
# this should be managed by the daemon later
if [ "$THERMAL_POLLING_FREQUENCY" != "0" ];then
[ -z "$THERMAL_POLLING_FREQUENCY" ] && THERMAL_POLLING_FREQUENCY=2
for x in /proc/acpi/thermal_zone/*; do
[ -w $x/polling_frequency ] && echo "$THERMAL_POLLING_FREQUENCY" >$x/polling_frequency
done
fi
ACCESS_PROC_EVENTS=" (accessing ACPI events over acpid) "
ACPI_EVENT_FILE="/var/run/acpid.socket"
pidof $ACPID_BIN >/dev/null
ACPID_NOT_RUNNING=$?
# if acpid is not there we need access to /proc/acpi/event
if [ $ACPID_NOT_RUNNING = 1 ];then
$LOGGER "WARN: Service powersaved skipped. You have to start acpid before powersaved"
echo -n "###############################################
# ACPI system but acpid not running. #
# Start acpid first, then restart powersaved! #
###############################################"
return $ACPID_NOT_RUNNING
fi
elif [ "$ACPI_APM" = "APM" ]; then
# check whether apmd is already running
checkpid "apmd" &>/dev/null
RETVAL=$?
if [ $RETVAL = 0 ];then
echo -n "APM daemon is already running, stop it first and restart service"
echo
return $RETVAL
fi
echo -n "This machine supports APM "
#### when neither APM nor ACPI is found, do still start the powersave daemon
#### we still provide suspend to disk and possibly cpufreq feature
#### this is always the case on ppc workstations
# else
# $LOGGER "INFO: Your system does neither support ACPI nor APM. \
#the powersave service does not provide any features for this machine, therefore the service is skipped."
# rc_status -s
fi
CPUFREQ_MODULES="speedstep_centrino powernow_k8 powernow_k7 powernow_k6 longrun longhaul acpi speedstep_ich"
CPUFREQ_MODULES_GREP="^speedstep_centrino\|^speedstep_ich\|^powernow_k8\|^powernow_k7\|^powernow_k6\|^longrun\|^longhaul\|^acpi"
###### load CPUFREQ modules############
# module specfied in sysconfig.cpufreq?
# also check whether /sys/.../cpufreq already exists This might
# happen if modules are already loaded or compiled into kernel
# (default on ppc)
if [ "$CPUFREQD_MODULE" != "off" ] && [ ! -d /sys/devices/system/cpu/cpu0/cpufreq ]; then
# test for already loaded modules
ALREADY_LOADED_MODS=`grep $CPUFREQ_MODULES_GREP /proc/modules`
if [ "$CPUFREQD_MODULE" ]; then
modprobe -q $CPUFREQD_MODULE $CPUFREQD_MODULE_OPTS &>/dev/null
RETVAL=$?
# try to load one of the modules we know
elif [ -z "$ALREADY_LOADED_MODS" ] ; then
for MODULE in $CPUFREQ_MODULES; do
modprobe $MODULE &>/dev/null
RETVAL=$?
[ "$RETVAL" = 0 ] && break
done
# skip if no module could be loaded!
if [ "$RETVAL" != 0 ]; then
$LOGGER "CPU frequency scaling is not supported by your processor."
$LOGGER "enter 'CPUFREQD_MODULE=off' in $CONFIG/cpufreq to avoid this warning."
else
$LOGGER "enter '$MODULE' into CPUFREQD_MODULE in $CONFIG/cpufreq."
$LOGGER "this will speed up starting powersaved and avoid unnecessary warnings in syslog."
fi
fi
# sleeping should not be necessary, all is processed sequential
# usleep 10000
fi
# see function above
# -> load powersave,performance,userspace and ondemand governor
[ "$CPUFREQD_MODULE" != "off" ] && load_governors
###### load CPUFREQ modules############
echo -ne "Starting powersaved $ACCESS_PROC_EVENTS"
OPTS="$OPTS -v ${DEBUG:-3}"
daemon $powersaved_BIN -d ${ACPI_EVENT_FILE:+-f "$ACPI_EVENT_FILE"} $OPTS
RETVAL=$?
echo
return $RETVAL
}
stop() {
echo -n "Shutting down powersaved "
killproc $powersaved_BIN
RETVAL=$?
echo
return $RETVAL
}
case "$1" in
start)
start
;;
stop)
stop
;;
restart)
stop
start
;;
status)
status $powersaved_BIN
RETVAL=$?
;;
*)
echo "Usage: $0" \
"{start|stop|status|}"
exit 1
;;
esac
exit $RETVAL
|
