Reducing power consumption in a logically partitioned data processing system with operating system call that indicates a selected processor is unneeded for a period of time

摘要

A method, apparatus, and computer instructions for managing a set of processors. A call from an operating system is received. The call indicates that a selected processor in the set of processors is unneeded for a period of time. In response to receiving this call, the operation of the selected processor is altered to reduce power usage during the period of time.