3662033599
the throttling state in response to line transitions. Future plans include adding support for CPU frequency changes. Add a devd.conf entry for calling this script. The default values for this are: performance_cx_lowest="HIGH" # Use HLT (C0) online performance_throttle_state="HIGH" # 100% (no throttling) economy_cx_lowest="LOW" # Use the lowest Cx state possible economy_throttle_state="HIGH" # 100% (no throttling)
87 lines
1.8 KiB
Bash
87 lines
1.8 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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# KEYWORD: FreeBSD nostart
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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=${lowest_value}
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;;
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*)
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;;
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esac
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# Set the desired value
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[ -n "${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: $0 [0x00|0x01]"
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exit 1
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esac
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# Set the various sysctls based on the profile's values.
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node="hw.acpi.cpu.cx_lowest"
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highest_value=0
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lowest_value="$(sysctl -n hw.acpi.cpu.cx_supported | \
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awk '{ print split($0, a) - 1 }' - 2> /dev/null)"
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eval value=\$${profile}_cx_lowest
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sysctl_set
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node="hw.acpi.cpu.throttle_state"
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highest_value="$(sysctl -n hw.acpi.cpu.throttle_max 2> /dev/null)"
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lowest_value="1"
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eval value=\$${profile}_throttle_state
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sysctl_set
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exit 0
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