PC World Komputer 2010 April/PCWorld0410.iso/hity wydania/Ubuntu 9.10 PL/karmelkowy-koliberek-desktop-9.10-i386-PL.iso/casper/filesystem.squashfs/usr/share/laptop-mode-tools/modules/cpufreq

Text File | 2009-10-06 | 4.1 KB | 132 lines

#! /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() {
    $LM_VERBOSE && echo "Executing: echo $2 > $1" >> $OUTPUT
    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

            $LM_VERBOSE && echo "Setting CPU maximum frequency for cpu $THISCPU to $THIS_CPU_MAXFREQ." >> $OUTPUT
            set_sysctl $THISCPU/cpufreq/scaling_max_freq $THIS_CPU_MAXFREQ
            $LM_VERBOSE && echo "Setting CPU minimum frequency for cpu $THISCPU to $THIS_CPU_MINFREQ." >> $OUTPUT
            set_sysctl $THISCPU/cpufreq/scaling_min_freq $THIS_CPU_MINFREQ
            $LM_VERBOSE && echo "Setting CPU frequency governor for cpu $THISCPU to $THIS_CPU_GOVERNOR." >> $OUTPUT
            /sbin/modprobe -q cpufreq_$THIS_CPU_GOVERNOR >> $OUTPUT 2>&1
            set_sysctl $THISCPU/cpufreq/scaling_governor $THIS_CPU_GOVERNOR
            if [ -f "$THISCPU/cpufreq/$THIS_CPU_GOVERNOR/ignore_nice_load" ] ; then
                $LM_VERBOSE && echo "Setting CPU ignore_nice_load for cpu $THISCPU to $THIS_CPU_IGNORE_NICE_LOAD." >> $OUTPUT
                set_sysctl $THISCPU/cpufreq/$THIS_CPU_GOVERNOR/ignore_nice_load $THIS_CPU_IGNORE_NICE_LOAD
            else
                $LM_VERBOSE && echo "Not setting CPU ignore_nice_load for cpu $THISCPU." >> $OUTPUT
                $LM_VERBOSE && echo "File $THISCPU/cpufreq/$THIS_CPU_GOVERNOR/ignore_nice_load does not exist." >> $OUTPUT
            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

            $LM_VERBOSE && echo "Setting throttling level for cpu $THISCPU to $THIS_CPU_THROTTLING." >> $OUTPUT
            set_sysctl $THISCPU/throttling $THIS_CPU_THROTTLING
        fi
    done
fi