blob: 09b5f6ed8e153efa009b32bf3867485a93bb5bff [file] [log] [blame]
#! /bin/sh
#
# Laptop mode tools module to handle CPU frequency settings.
#
# Set kernel setting, showing an error if this fails.
# Parameter 1: sysctl/proc path
# Parameter 2: the value
set_sysctl() {
log "VERBOSE" "Executing: echo $2 > $1"
if ! echo "$2" > "$1" ; then
echo "SETTING OF KERNEL PARAMETER FAILED: echo $2 \> $1"
fi
}
#
# get_medium_value
#
# Get the medium value from a list of numerical values.
# $1 = file containing the list of values
#
get_medium_value() {
cat "$1" | tr ' ' '\n' | sort -n | awk -v RS="" '{n=split($0,a); print a[int((n+1)/2)]}'
}
if [ x$CONTROL_CPU_FREQUENCY = x1 ] ; then
if [ $ON_AC -eq 1 ] ; then
if [ "$ACTIVATE" -eq 1 ] ; then
CPU_MAXFREQ="$LM_AC_CPU_MAXFREQ"
CPU_MINFREQ="$LM_AC_CPU_MINFREQ"
CPU_GOVERNOR="$LM_AC_CPU_GOVERNOR"
CPU_IGNORE_NICE_LOAD="$LM_AC_CPU_IGNORE_NICE_LOAD"
else
CPU_MAXFREQ="$NOLM_AC_CPU_MAXFREQ"
CPU_MINFREQ="$NOLM_AC_CPU_MINFREQ"
CPU_GOVERNOR="$NOLM_AC_CPU_GOVERNOR"
CPU_IGNORE_NICE_LOAD="$NOLM_AC_CPU_IGNORE_NICE_LOAD"
fi
else
CPU_MAXFREQ="$BATT_CPU_MAXFREQ"
CPU_MINFREQ="$BATT_CPU_MINFREQ"
CPU_GOVERNOR="$BATT_CPU_GOVERNOR"
CPU_IGNORE_NICE_LOAD="$BATT_CPU_IGNORE_NICE_LOAD"
fi
for THISCPU in /sys/devices/system/cpu/* ; do
if [ -e $THISCPU/cpufreq/cpuinfo_min_freq ]; then
THIS_CPU_MAXFREQ="$CPU_MAXFREQ"
THIS_CPU_MINFREQ="$CPU_MINFREQ"
THIS_CPU_GOVERNOR="$CPU_GOVERNOR"
THIS_CPU_IGNORE_NICE_LOAD="$CPU_IGNORE_NICE_LOAD"
case "$CPU_MAXFREQ" in
"slowest")
THIS_CPU_MAXFREQ=`cat $THISCPU/cpufreq/cpuinfo_min_freq`
;;
"medium")
THIS_CPU_MAXFREQ=$(get_medium_value $THISCPU/cpufreq/scaling_available_frequencies)
;;
"fastest")
THIS_CPU_MAXFREQ=`cat $THISCPU/cpufreq/cpuinfo_max_freq`
;;
esac
case "$CPU_MINFREQ" in
"slowest")
THIS_CPU_MINFREQ=`cat $THISCPU/cpufreq/cpuinfo_min_freq`
;;
"medium")
THIS_CPU_MINFREQ=$(get_medium_value $THISCPU/cpufreq/scaling_available_frequencies)
;;
"fastest")
THIS_CPU_MINFREQ=`cat $THISCPU/cpufreq/cpuinfo_max_freq`
;;
esac
log "VERBOSE" "Setting CPU maximum frequency for cpu $THISCPU to $THIS_CPU_MAXFREQ."
set_sysctl $THISCPU/cpufreq/scaling_max_freq $THIS_CPU_MAXFREQ
log "VERBOSE" "Setting CPU minimum frequency for cpu $THISCPU to $THIS_CPU_MINFREQ."
set_sysctl $THISCPU/cpufreq/scaling_min_freq $THIS_CPU_MINFREQ
log "VERBOSE" "Setting CPU frequency governor for cpu $THISCPU to $THIS_CPU_GOVERNOR."
log "VERBOSE" "`/sbin/modprobe -q cpufreq_$THIS_CPU_GOVERNOR 2>&1`"
set_sysctl $THISCPU/cpufreq/scaling_governor $THIS_CPU_GOVERNOR
if [ -f "$THISCPU/cpufreq/$THIS_CPU_GOVERNOR/ignore_nice_load" ] ; then
log "VERBOSE" "Setting CPU ignore_nice_load for cpu $THISCPU to $THIS_CPU_IGNORE_NICE_LOAD."
set_sysctl $THISCPU/cpufreq/$THIS_CPU_GOVERNOR/ignore_nice_load $THIS_CPU_IGNORE_NICE_LOAD
else
log "VERBOSE" "Not setting CPU ignore_nice_load for cpu $THISCPU."
log "VERBOSE" "File $THISCPU/cpufreq/$THIS_CPU_GOVERNOR/ignore_nice_load does not exist."
fi
fi
done
fi
if [ x$CONTROL_CPU_THROTTLING = x1 ] ; then
if [ $ON_AC -eq 1 ] ; then
if [ "$ACTIVATE" -eq 1 ] ; then
CPU_THROTTLING="$LM_AC_CPU_THROTTLING"
else
CPU_THROTTLING="$NOLM_AC_CPU_THROTTLING"
fi
else
CPU_THROTTLING="$BATT_CPU_THROTTLING"
fi
for THISCPU in /proc/acpi/processor/* ; do
if [ -e $THISCPU/throttling ]; then
NUM_LEVELS=`cat $THISCPU/throttling | grep "T[0123456789]*\:" | wc -l`
case "$CPU_THROTTLING" in
"minimum")
THIS_CPU_THROTTLING=0
;;
"medium")
# Divide but round up: that way, "medium" on a two-level system will
# lead to full throttling -- which is 50% on my system, quite reasonable.
THIS_CPU_THROTTLING=$(( ($NUM_LEVELS / 2 ) ))
;;
"maximum")
THIS_CPU_THROTTLING=$(($NUM_LEVELS - 1))
;;
*)
THIS_CPU_THROTTLING="$CPU_THROTTLING"
esac
log "VERBOSE" "Setting throttling level for cpu $THISCPU to $THIS_CPU_THROTTLING."
set_sysctl $THISCPU/throttling $THIS_CPU_THROTTLING
fi
done
fi