The introduction of the tickless kernel in Red Hat Enterprise Linux 6 (refer to Section 12.4.2, “Tickless Kernel”
) allows the CPU to enter the idle state more frequently, reducing power consumption and improving power management. The new powertop
tool provides the ability to identify specific components of kernel and userspace applications that frequently wake up the CPU. powertop
was used in development to identify and tune many applications in this release, reducing unnecessary CPU wake up by a factor of 10.