Electrical computers and digital processing systems: support – Computer power control – Power conservation
Reexamination Certificate
2006-12-05
2006-12-05
Cao, Chun (Department: 2115)
Electrical computers and digital processing systems: support
Computer power control
Power conservation
C718S100000, C713S500000, C713S600000
Reexamination Certificate
active
07146513
ABSTRACT:
An information processing system that can reduce its power consumption by means of robust power controlling even upon occurrence of an interruption/exception processing. If it is found that there is no task set in the ready state as a result of watching the number of tasks set in the ready state by the RTOS or ready state watching task, the system controls the RTOS or ready state watching task so as to lower the power while the current active task controls the power according to the preset WCET of each application slice. On the contrary, if there is any task set in the ready state, the system controls so as to raise the power and the current active task comes to control the power according to the virtual WCET that is earlier than the WCET of each application slice. And, if there is no task set in the ready state and there is no current active task, the system controls so that the RTOS or both of the ready state watching task and sleep task lower the power. This is why the present invention can reduce the power consumption of the subject information processing system.
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Nutt Gary J., Operating Systems: A Modern Perspective, 2000, Addison-Wesley, 2nd Ed., pp. 160-161.
Irie Naohiko
Misaka Satoshi
A. Marquez, Esq. Juan Carlos
Cao Chun
Connolly Mark
Fisher Esq. Stanley P.
Hitachi , Ltd.
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