Patent ID: 7325148

Claim:
A power supply management system in a parallel processing system by an OS for single processors, wherein on a parallel processing system which operates an OS and an application for single processors on a multiprocessor, said multiprocessor being logically divided into two groups of a first processor side and a second processor side, and controls a unit of work that can be parallelized within said application operating on a processor on said first processor side as a new unit of work on a processor on said second processor side, thereby executing parallel processing by said multiprocessor with respect to said application, the processor on said first processor side accepts a request for activating or stopping a processor from a unit of work on any of the processors and controls a device of said OS for single processors to activate or stop the requested processor, and said processor requested to be activated or stopped executes processing necessary for said activation or stop based on a notification from said first processor side, wherein further comprising on said first processor side a main power supply management unit having a function, regarding power supply management of each processor, of managing a state of power supply of said second processor side and a function of making a request for changing a power supply state to said OS for single processors, and on said second processor side, a sub power supply, management unit having a function of executing processing necessary for said activation or stop and a function of making a request for activation or stop of other processor to said main power supply management unit.