INFORMATION PROCESSOR, PROGRAM, RECORDING MEDIUM AND CONTROL CIRCUIT

Japanese Patent JP3857661

B2

PROBLEM TO BE SOLVED: To provide an information processor or the like allowing reduction of electric power consumption.
SOLUTION: This information processor 10 has a normal operation mode for executing consistency control for bringing contents of a cache memory of a processor into line with contents of a main memory, and a power-saving operation mode for reducing the power consumption as compared with the normal operation mode without executing the consistency control, and changes over the power-saving operation mode to the normal operation mode when an input/output device accesses the main memory in the power-saving operation mode. The information processor 10 has: an attribute setting part setting a device area that is an area accessed by the input/output device of the information processor, of the main memory, to a non-cacheble attribute wherein the consistency control is not executed even in the normal operation mode; and an operation mode setting part making the input/output device access the device area with the operation mode of the information processor kept in the power-saving operation mode when the input/output device requests the access to the device area in the power-saving operation mode.

Noriyoshi Yoshiyama
Seiichi Kono
Hirohide Omiyama
Satoshi Nakamura

JP2003068272A

December 13, 2006

March 13, 2003

Click for automatic bibliography generation  

INTERNATIONAL BUSINESS MASCHINES CORPORATION

G06F1/32; G06F12/08; (IPC1-7): G06F12/08; G06F1/32

JP2000039937A
JP2003067092A
JP2002510413A
JP2002073226A
JP2003044358A
JP63247852A
JP62226350A

Hiromichi Watanabe
Kazuo Moriya
Hiroshi Sakaguchi
Yoshihiro City
Takeshi Ueno

Previous Patent: ARTICLE STORAGE TO BE INSTALLED IN VERANDA

Next Patent: MULTI-SYSTEM NUMERICAL CONTROLLER HAVING INTER-SYSTEM AXIS EXCHANGE CONTROL FUNCTION