aaacd70897
and it needs syslogd due to using logger(1). Have it run as early as possible to save battery power for laptop users.
94 lines
2.0 KiB
Bash
94 lines
2.0 KiB
Bash
#!/bin/sh
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#
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# Modify the power profile based on AC line state. This script is
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# usually called from devd(8).
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#
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# Arguments: 0x00 (AC offline, economy) or 0x01 (AC online, performance)
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#
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# $FreeBSD$
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#
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# PROVIDE: power_profile
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# REQUIRE: mountcritlocal syslogd
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# KEYWORD: nojail nostart
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# BEFORE: NETWORKING
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. /etc/rc.subr
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name="power_profile"
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LOGGER="logger -t power_profile -p daemon.notice"
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# Set a given sysctl node to a value.
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#
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# Variables:
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# $node: sysctl node to set with the new value
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# $value: HIGH for the highest performance value, LOW for the best
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# economy value, or the value itself.
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# $highest_value: maximum value for this sysctl, when $value is "HIGH"
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# $lowest_value: minimum value for this sysctl, when $value is "LOW"
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#
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sysctl_set ()
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{
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# Check if the node exists
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if [ -z "$(sysctl -n ${node} 2> /dev/null)" ]; then
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return
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fi
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# Get the new value, checking for special types HIGH or LOW
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case ${value} in
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[Hh][Ii][Gg][Hh])
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value=${highest_value}
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;;
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[Ll][Oo][Ww])
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value=${lowest_value}
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;;
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[Nn][Oo][Nn][Ee])
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return
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;;
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*)
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;;
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esac
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# Set the desired value
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[ -n "${value}" ] && sysctl ${node}=${value}
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}
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if [ $# -ne 1 ]; then
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err 1 "Usage: $0 [0x00|0x01]"
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fi
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load_rc_config $name
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# Find the next state (performance or economy).
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state=$1
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case ${state} in
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0x01 | '')
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${LOGGER} "changed to 'performance'"
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profile="performance"
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;;
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0x00)
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${LOGGER} "changed to 'economy'"
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profile="economy"
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;;
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*)
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echo "Usage: $0 [0x00|0x01]"
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exit 1
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esac
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# Set the various sysctls based on the profile's values.
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node="hw.acpi.cpu.cx_lowest"
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highest_value="C1"
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lowest_value="`(sysctl -n hw.acpi.cpu.cx_supported | \
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awk '{ print "C" split($0, a) }' -) 2> /dev/null`"
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eval value=\$${profile}_cx_lowest
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sysctl_set
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node="dev.cpu.0.freq"
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highest_value="`(sysctl -n dev.cpu.0.freq_levels | \
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awk '{ split($0, a, "[/ ]"); print a[1] }' -) 2> /dev/null`"
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lowest_value="`(sysctl -n dev.cpu.0.freq_levels | \
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awk '{ split($0, a, "[/ ]"); print a[length(a) - 1] }' -) 2> /dev/null`"
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eval value=\$${profile}_cpu_freq
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sysctl_set
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exit 0
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