power_profile revision 136224 
1#!/bin/sh
2#
3# Modify the power profile based on AC line state.  This script is
4# usually called from devd(8).
5#
6# Arguments: 0x00 (AC offline, economy) or 0x01 (AC online, performance)
7#
8# $FreeBSD: head/etc/rc.d/power_profile 136224 2004-10-07 13:55:26Z mtm $
9#
10
11# PROVIDE: power_profile
12# KEYWORD: nojail nostart
13
14. /etc/rc.subr
15
16name="power_profile"
17LOGGER="logger -t power_profile -p daemon.notice"
18
19# Set a given sysctl node to a value.
20#
21# Variables:
22# $node: sysctl node to set with the new value
23# $value: HIGH for the highest performance value, LOW for the best
24#	  economy value, or the value itself.
25# $highest_value: maximum value for this sysctl, when $value is "HIGH"
26# $lowest_value: minimum value for this sysctl, when $value is "LOW"
27#
28sysctl_set ()
29{
30	# Check if the node exists
31	if [ -z "$(sysctl -n ${node} 2> /dev/null)" ]; then
32		return
33	fi
34
35	# Get the new value, checking for special types HIGH or LOW
36	case ${value} in
37	[Hh][Ii][Gg][Hh])
38		value=${highest_value}
39		;;
40	[Ll][Oo][Ww])
41		value=${lowest_value}
42		;;
43	*)
44		;;
45	esac
46
47	# Set the desired value
48	[ -n "${value}" ] && sysctl ${node}=${value}
49}
50
51if [ $# -ne 1 ]; then
52	err 1 "Usage: $0 [0x00|0x01]"
53fi
54load_rc_config $name
55
56# Find the next state (performance or economy).
57state=$1
58case ${state} in
590x01 | '')
60	${LOGGER} "changed to 'performance'"
61	profile="performance"
62	;;
630x00)
64	${LOGGER} "changed to 'economy'"
65	profile="economy"
66	;;
67*)
68	echo "Usage: $0 [0x00|0x01]"
69	exit 1
70esac
71
72# Set the various sysctls based on the profile's values.
73node="hw.acpi.cpu.cx_lowest"
74highest_value="C1"
75lowest_value="$(sysctl -n hw.acpi.cpu.cx_supported | \
76	awk '{ print "C" split($0, a) }' - 2> /dev/null)"
77eval value=\$${profile}_cx_lowest
78sysctl_set
79
80node="hw.acpi.cpu.throttle_state"
81highest_value="$(sysctl -n hw.acpi.cpu.throttle_max 2> /dev/null)"
82lowest_value="1"
83eval value=\$${profile}_throttle_state
84sysctl_set
85
86exit 0
87