Configuration:a 2.667 GHz Intel® Core™ 2 Duo processor with 2 Gb RAM
Kernel power performance trend
This graph shows the power performance trend of the latest mainline kernel.
Power saving features
The following graph shows the saving in power by employing various features in the Linux development kernel.
Tickless - This feature allows enable the CPU not to be woken up only when necessary instead of at regular intervals. It can be enabled by setting CONFIG_NO_HZ in kernel configuration during compile time.
alpm-patch - Many AHCI SATA controller chips have a feature that allows the controller to power down the SATA link to the disk when idle. This feature can save up to 1 Watt of power per SATA link. The patch can be found here.
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