Methods and apparatus for clock management based on environmental conditions

摘要

A method and apparatus for controlling processor clock rates of a synchronous multi-processor system in response to an environmental condition of a processor. In one embodiment, a processor-reported an environmental condition is stored in a register and all processors are interrupted simultaneously. Upon interrupt, each processor reads the contents of the register and responds by adjusting its local clock rate synchronously with the other processors. In another embodiment, the processor's environmental status is polled by software control. Upon notification of an environmental condition, the software control notifies each processor to adjust its local clock rate synchronously with the other processors.