Apparatus and method for shortening the time returning from a power-saving mode to normal power mode and reducing power consumption in the power-saving mode

摘要

In an information processing apparatus which incorporates a plurality of arithmetic units and a plurality of storage units, power consumption in a power saving mode is reduced, and a return time required to return from the power saving mode to a normal power mode is shortened. With this invention, in an information processing method in an information processing apparatus which incorporates a plurality of CPUs and a plurality of RAMs, when a condition required to transit to the power saving mode is satisfied, each CPU stores information associated with an operation state of an active program in one RAM, and turns off the power supply to devices except for the one RAM.