Matsushita Electric Industrial Co., Ltd.

Panasonic Corporation

Masashige Mizuyama

Atsunobu Kato

Satoshi Inami

Hidehiko Shin

Masahiko Saito

Takako Hirose

Hiromi Wada

Katsushige Amano

Kazuomi Kato

Munehito Matsuda

An object of the invention is to reduce the electric power consumption resulting from temporarily activating a processor requiring a large electric power consumption, out of a plurality of processors. A multiprocessor system () includes: a first processor () which executes a first instruction code; a second processor () which executes a second instruction code, a hypervisor () which converts the second instruction code into an instruction code executable by the first processor (); and a power control circuit () which controls the operation of at least one of the first processor () and the second processor (). When the operation of the second processor () is suppressed by the power control circuit (), the hypervisor () converts the second instruction code into the instruction code executable by the first processor (), and the first processor () executes the converted instruction code.

Multiprocessor control apparatus for controlling a plurality of processors sharing a memory and an internal bus and multiprocessor control method and multiprocessor control circuit for performing the same

Each task #registers signal handlers belonging thereto in a signal-handler table through a handler registering section in an OS, and registers itself and the priority thereof in a task/handler priority table through a task registering section. When a signal is generated, a signal notifying section specifies a signal handler corresponding to the signal and the priority thereof by referring to the signal-handler table, and a task/handler selecting section selects a task or signal handler having a highest priority in the task/handler priority table. A task executing section executes the selected task and a signal-handler executing section executes the selected signal handler.

Task scheduling apparatus, task scheduling method, task scheduling program, storage medium and transmission medium

A clock controller controls a clock generated by a clock generator to determine a clock frequency. A computing device executes software obtained from a storage in accordance with the clock supplied via the clock controller. An exclusive processing section detector detects the start and end of an exclusive processing section which is a section during which an exclusive processing is executed. A clock control judging device commands the clock controller to decrease the clock frequency if the exclusive processing section detector has detected the start of a specific processing section, while commanding the clock controller to decrease the clock frequency if the exclusive processing section detector has detected the end of the specific processing section.

Method for controlling a clock frequency of an information processor in accordance with the detection of a start and a end of a specific processing section

A terminal-side communications control unit makes a request to a server for retrieving an instruction file that describes an instruction for transmitting transmission data. The server transmits the instruction file in response to the request for retrieving the instruction file. On receiving the instruction file, the terminal-side communications control unit causes an application executing unit to execute an application, and also forwards the instruction file to a transmission data generating unit. On receiving the instruction file, the transmission data generating part refers to the instruction file to generate, from generated data stored in a generated data storage unit, transmission data to be transmitted to the server.

Communications system for retrieving instruction files from a server

In a communications terminala CPUretrieves start-up datafrom a serverusing a Web browserwhich is stored in a storage deviceThe CPUperforms data authentication with respect to authentication type dataincluded in the start-up dataThen, when the authentication is succeeded, the CPUfollows the authentication type dataso as to determine which authentication mode is to be used for authenticating the application data. In this manner, the authentication mode for authenticating the application data can be easily changed.

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Neyagawa, Japan

Masashige Mizuyama