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