55 lines
2.7 KiB
Plaintext
55 lines
2.7 KiB
Plaintext
A small app of questionable value (myself I use it to throttle the CPU when I perceive it
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is getting too hot). At the moment the code is optimized for a dell laptop but should work
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on most ACPI systems.
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Supports changing cpu speed via performance (Intl's enhanced speedstep in
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Centrino/Pentium M cpus) as well, via the -p command line option. This is good for
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saving energy while on batteries and it can also avoid fan noise.
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It also features automatic, dynamic downclocking/throttling depending on the cpu
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temperature. This can be useful to avoid fan noise. To enable this feature, simply
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run wmthrottle with the -t <temperature> option and give it a certain temperature
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threshold. Starting at this threshold, it will change performance/throttle states.
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This is dynamic, i.e. a higher temperature will result in a lower clock speed
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(or higher throttling).
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The temperature threshold depends on the machine you use it on and on workload.
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The machine it was tested on (Acer TravelMate 800) requires a
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threshold of 49/50 degrees (Celsius) when having 100% cpu usage to keep the cpu fan
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from turning on.
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Note that although the numbers above are in Celsius, this feature should work with
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Fahrenheit as well. Simply check /proc/acpi/thermal_zone/THRM/temperature to see
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if your acpi is set to use Celsius or Fahrenheit.
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When the -t switch is set, wmthrottle will change cpu performance/throttling
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states every one degree. Example: You start wmthrottle with -t 49, which means
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that it will change from state 0 to state 1 when the cpu is at 49 degrees,
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and will change from state 1 to 2 when the temperature increases by 1 degree,
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i.e. at 50 degrees, and so on.
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If your setup requires a different temperature delta value, e.g. when your
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system is using Fahrenheit, you can set this value using the -e switch.
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You will probably have to plain with both the -t and the -e switches since
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all computers are different.
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Once you have started wmthrottle, change throttle/performance states by
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clicking on state numbers.
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If started with the -t <temperature> option, clicking on the [T] toggles
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dynamic performance/throttle changes. If you turn it off, you can also choose
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states manually again.
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Clicking anywhere else will toggle the back light.
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If you want to use wmthrottle with a windowmanager other than windowmaker, the
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-bw (--broken-wm) flag will probably be your friend.
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wmthrottle certainly needs to be run as root. To always run it as root, simply set the
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setuid bit on wmthrottle after installing:
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# chmod u+s wmthrottle
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This means that wmthrottle is always run by whoever owns it (root in this case),
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no matter who started it.
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Also remember that playing around with your CPU etc can be a bad thing so saying
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standard I take no responsibility for damage to your machine disclaimer applies.
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