etc-gentoo/hprofile/profiles/power/start

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#
# $Header: profiles/power/start Exp $
#
local cpu pci usb hda nmi vmw aspm scsi
declare -A opt
opt=(
[cpu]=${1:-powersave}
[pci]=${2:-auto}
[usb]=${3:-auto}
[hda]=${5:-1}
[nmi]=${6:-0}
[vmw]=${7:-1000}
[aspm]=${8:-default}
[scsi]=${4:-min_power}
)
for cpu in /sys/devices/system/cpu/cpu[0-9]*; do
echo ${opt[cpu]} >$cpu/cpufreq/scaling_governor
done
[ -e /sys/module/pcie_aspm/parameters/policy ] &&
echo ${opt[aspm]} >/sys/module/pcie_aspm/parameters/policy >/dev/null 2>&1
for scsi in /sys/class/scsi_host/host[0-9]*; do
[ -e $scsi/link_power_management_policy ] || continue
case "$(< $scsi/proc_name)" in
(ahci|usb-storage)
echo ${opt[scsi]} >$scsi/link_power_management_policy;;
(*) ;;
esac
done
# set usb host to auto powersave
for usb in /sys/bus/usb/devices/{usb[0-9],[0-9]-[0-9]}; do
echo ${opt[usb]} >$usb/power/control
done
# pci power control
for pci in /sys/bus/pci/devices/0000:0*; do
echo ${opt[pci]} >$pci/power/control
done
# snd-hda-intel powersave
[ -e /sys/module/snd_hda_intel/parameters/power_save ] &&
echo ${opt[hda]} >/sys/module/snd_hda_intel/parameters/power_save
# turn off NMI watchdog
[ -e /proc/sys/kernel/nmi_watchdog ] &&
echo ${opt[nmi]} >/proc/sys/kernel/nmi_watchdog
# VM write back timeout
[ -e /proc/sys/vm/dirty_writeback_centisecs ] &&
echo ${opt[vmw]} >/proc/sys/vm/dirty_writeback_centisecs
unset opt
[[ "${HPROFILE[power]}" == "network" ]] || return
local iface running
for iface in $(ifconfig | sed -nre 's/(^[ew].*[0-9]{1}):.*/\1/p'); do
running="$(ifconfig $iface | sed -nre /$iface/'s/.*(RUNNING).*/\1/p')"
[[ "$running" ]] || ifconfig "$iface" down
done
#
# vim:fenc=utf-8:ft=sh:ci:pi:sts=0:sw=4:ts=4:
#