http://www.lesswatts.org/projects/powertop/
Computer programs can make your computer use more
power. PowerTOP is a Linux tool that helps you find those programs that
are
misbehaving while your computer is idle. The application that
misbehaved the most was the Linux kernel. However, as
of version 2.6.21, the Linux kernel went tickless, and no longer has a
fixed
1000Hz timer tick. The result (in theory) is huge power savings because
the CPU stays in low power mode for longer periods during system
idle.
However... there are many things that can ruin the party, both inside
the
kernel and in userspace. PowerTOP combines various sources of
information
from the kernel into one convenient screen so that you can see how well
your
system is doing at saving power, and which components are the biggest
problems.
PowerTOP has these four basic goals:
- Show how well your system is using the various hardware
power-saving features
- Show you the culprit software components that are preventing
optimal usage of your hardware power savings
- Help Linux developers test their application and achieve optimal
behavior
- Provide you with tuning suggestions to achieve low power
consumption
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- [linuxkernelnewbies] LessWatts.org - Saving Power on Intel syst... Peter Teoh
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