How do I set up advanced power management on a linux system?

IBM rolled out the POWER5 processor in 2004. The 1.9 GHz version posted the highest uniprocessor SPECfp score of any shipping chip. The POWER5 powers the i5 and p5 eServers. Improvements in the POWER5 over the POWER4 include: a larger L2 cache, a memory controller on the chip, simultaneous multithreading which appears to the operating system as multiple CPUs, advanced power management, dedicated single-tasking mode, Hypervisor (virtualization technology), and eFuse (hardware re-routing around faults). Ravi Arimilli, IBM's chief microprocessor designer has said: "The POWER5 chip is more of a midrange design that can drive up to the high end and then down to things like blades." IBM servers built with the POWER5 processor offer virtualization features: logical partitioning and micro partitioning. Up to ten LPARs (logical partitions) can be created for each CPU, the biggest 64-Way system can run 256 independent operating systems. Memory, CPU-Power and I/O can be dynamically moved between partitions. See also Linux on Power.