Finding modern computer CPU frequency scaling function is reduced and the processor speed to run time to dynamic performance and energy consumption is increasing, if necessary with the possibility to save energy at the same time. Slackware is very easy on the CPU frequency scale activation fee and requires a minimum of two kernel modules and run a simple command. On the one hand, it is essential that specific CPU, the frequency calibration function to load the platform to activate a driver. Second, a CPU frequency scaling governor, one to decide when and how internal processor speed change and need to choose modules. It is always run at full speed governors governors, governors and always at low speed, CPU usage, etc. based on the running speed

Usually it is desirable as soon as possible in the boot process to activate CPU frequency scale, but needs a few seconds at full power is not as important. The easiest way, however, so that you startup script / etc / rc.d / rc.local runs right at the end of the boot process. Other approaches require more intrusive changes. You need a startup script and command module can load an initial RAM disk is replaced. The same / etc / rc.d / rc.modules.local or even an employee can be up to rc.local. It's up to you to decide when, where to download and activate the function.

The second step is to load a module governor. Governor, most people only need to download to name, there is always the lowest available frequency to complete processing. If the computer is idle, the minimum processor speed. If you have a very CPU intensive task, and the frequency increased. The governor also recommended that your laptop is Intel. / Lib modules / Governor all available modules / (uname-r) / cpufreq / kernel drivers. A governor, the first step load the appropriate module, CPU module with as we had before.

Governor says the module can be used immediately. In fact, all the modules you can load the governor if you wish. Governor to decide what one to be determined at run time to time will be used. Each processor can have its own governor. That is, if you have a dual core machine, you set up a low power core and the other can force, if necessary. However, the most common case is one of the governor to use all the CPU. Each CPU file sys / system in your configuration file. For example, name / sys/devices/system/cpu/cpu0/cpufreq/scaling_governor to file first with the CPU. Other CPUs cpu0 place to increase. You use an open loop at the time all of them as governor for example a name, can set the OnDemand governor for each CPU:

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