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Cpuspeed

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Cpuspeed

CPUFreq is a Linux kernel subsystem which allows the clock speed of mobile CPUs (most often found in laptop computers) to be explicitly set. CPUSpeed dynamically controls CPUFreq, slowing down the CPU to conserve power and reduce heat when the system is idle, on battery power or overheating, and speeding up the CPU when the system is busy and more processing power is needed. Using CPUSpeed can significantly increase a laptop computer's battery life and significantly reduce the heat it generates while still allowing your system to perform at top speed when you need it.


Installation

Root terminal 48px.png
# pacman-g2 -S cpuspeed


Configuring

Now edit /etc/cpuspeed.conf

and put the correct driver for your cpu(s)

For example

DRIVER="p4-clockmod"

Check the available modules in this directory

/lib/modules/your_kernel_version/kernel/arch/i386/kernel/cpu/cpufreq

  • powernow-k7 for AMD Sempron/Athlon/MP (K7)
  • powernow-k8 for AMD Duron/Sempron/Athlon/Opteron 64 (K8)
  • p4-clockmod for Intel Pentium 4 and Intel Celeron M
  • speedstep-centrino forIntel Pentium M/Core Duo/Core 2 Duo (maybe now replaced by acpi-cpufreq)
  • acpi-cpufreq for the rest


Service

Root terminal 48px.png
# service cpuspeed add
Root terminal 48px.png
# service cpuspeed start
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