etc/rc.d/power_profile

#!/bin/sh
#
# Modify the power profile based on AC line state.  This script is
# usually called from devd(8).
#
# Arguments: 0x00 (AC offline, economy) or 0x01 (AC online, performance)
#
# $FreeBSD$
#

# PROVIDE: power_profile
# REQUIRE: FILESYSTEMS syslogd
# KEYWORD: nojail nostart

. /etc/rc.subr

name="power_profile"
stop_cmd=':'
LOGGER="logger -t power_profile -p daemon.notice"

# Set a given sysctl node to a value.
#
# Variables:
# $node: sysctl node to set with the new value
# $value: HIGH for the highest performance value, LOW for the best
#         economy value, or the value itself.
# $highest_value: maximum value for this sysctl, when $value is "HIGH"
# $lowest_value: minimum value for this sysctl, when $value is "LOW"
#
sysctl_set()
{
        # Check if the node exists
        if [ -z "$(sysctl -n ${node} 2> /dev/null)" ]; then
                return
        fi

        # Get the new value, checking for special types HIGH or LOW
        case ${value} in
        [Hh][Ii][Gg][Hh])
                value=${highest_value}
                ;;
        [Ll][Oo][Ww])
                value=${lowest_value}
                ;;
        [Nn][Oo][Nn][Ee])
                return
                ;;
        *)
                ;;
        esac

        # Set the desired value
        if [ -n "${value}" ]; then
                if ! sysctl ${node}=${value} > /dev/null 2>&1; then
                        warn "unable to set ${node}=${value}"
                fi
        fi
}

if [ $# -ne 1 ]; then
        err 1 "Usage: $0 [0x00|0x01]"
fi
load_rc_config $name

# Find the next state (performance or economy).
state=$1
case ${state} in
0x01 | '')
        ${LOGGER} "changed to 'performance'"
        profile="performance"
        ;;
0x00)
        ${LOGGER} "changed to 'economy'"
        profile="economy"
        ;;
*)
        echo "Usage: $0 [0x00|0x01]"
        exit 1
esac

# Set the various sysctls based on the profile's values.
node="hw.acpi.cpu.cx_lowest"
highest_value="C1"
lowest_value="Cmax"
eval value=\$${profile}_cx_lowest
sysctl_set

node="dev.cpu.0.freq"
highest_value="`(sysctl -n dev.cpu.0.freq_levels | \
        awk '{ split($0, a, "[/ ]"); print a[1] }' -) 2> /dev/null`"
lowest_value="`(sysctl -n dev.cpu.0.freq_levels | \
        awk '{ split($0, a, "[/ ]"); print a[length(a) - 1] }' -) 2> /dev/null`"
eval value=\$${profile}_cpu_freq
sysctl_set

exit 0
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	# $FreeBSD$
9	#
10
11	# PROVIDE: power_profile
12	# REQUIRE: FILESYSTEMS syslogd
13	# KEYWORD: nojail nostart
14
15	. /etc/rc.subr
16
17	name="power_profile"
18	stop_cmd=':'
19	LOGGER="logger -t power_profile -p daemon.notice"
20
21	# Set a given sysctl node to a value.
22	#
23	# Variables:
24	# $node: sysctl node to set with the new value
25	# $value: HIGH for the highest performance value, LOW for the best
26	# economy value, or the value itself.
27	# $highest_value: maximum value for this sysctl, when $value is "HIGH"
28	# $lowest_value: minimum value for this sysctl, when $value is "LOW"
29	#
30	sysctl_set()
31	{
32	# Check if the node exists
33	if [ -z "$(sysctl -n ${node} 2> /dev/null)" ]; then
34	return
35	fi
36
37	# Get the new value, checking for special types HIGH or LOW
38	case ${value} in
39	[Hh][Ii][Gg][Hh])
40	value=${highest_value}
41	;;
42	[Ll][Oo][Ww])
43	value=${lowest_value}
44	;;
45	[Nn][Oo][Nn][Ee])
46	return
47	;;
48	*)
49	;;
50	esac
51
52	# Set the desired value
53	if [ -n "${value}" ]; then
54	if ! sysctl ${node}=${value} > /dev/null 2>&1; then
55	warn "unable to set ${node}=${value}"
56	fi
57	fi
58	}
59
60	if [ $# -ne 1 ]; then
61	err 1 "Usage: $0 [0x00\|0x01]"
62	fi
63	load_rc_config $name
64
65	# Find the next state (performance or economy).
66	state=$1
67	case ${state} in
68	0x01 \| '')
69	${LOGGER} "changed to 'performance'"
70	profile="performance"
71	;;
72	0x00)
73	${LOGGER} "changed to 'economy'"
74	profile="economy"
75	;;
76	*)
77	echo "Usage: $0 [0x00\|0x01]"
78	exit 1
79	esac
80
81	# Set the various sysctls based on the profile's values.
82	node="hw.acpi.cpu.cx_lowest"
83	highest_value="C1"
84	lowest_value="Cmax"
85	eval value=\$${profile}_cx_lowest
86	sysctl_set
87
88	node="dev.cpu.0.freq"
89	highest_value="`(sysctl -n dev.cpu.0.freq_levels \| \
90	awk '{ split($0, a, "[/ ]"); print a[1] }' -) 2> /dev/null`"
91	lowest_value="`(sysctl -n dev.cpu.0.freq_levels \| \
92	awk '{ split($0, a, "[/ ]"); print a[length(a) - 1] }' -) 2> /dev/null`"
93	eval value=\$${profile}_cpu_freq
94	sysctl_set
95
96	exit 0