Abstract: According to an embodiment, a control system includes a detector, an estimating unit, a determining unit, and a controller. The detector detects an idle state. The estimating unit estimates an idle period. When the idle state is detected, the determining unit determines whether a first power consumption when writeback of data which needs to be written back to a main storage device is performed and supply of power to a cache memory is stopped, is larger than a second power consumption when writeback of the data is not performed and supply of power is continued for the idle period. The controller stops the supply of power to the cache memory when the first power consumption is determined to be smaller than the second power consumption and continues the supply of power when the first power consumption is determined to be larger than the second power consumption.

Abstract: According to an embodiment, an information processing device includes a memory device, one or more peripheral devices, a processor, and a state controller. The processor is able to change between a first state, in which a command is executed, and a second state, in which an interrupt is awaited. When the processor enters the second state and if an operation for data transfer is being performed between at least one of the peripheral devices and the memory device, the state controller switches the information processing device to a third state in which power consumption is lower as compared to the first state. If the operation for data transfer is not being performed between any of the peripheral devices and the memory device, the state controller switches the information processing device to a fourth state in which power consumption is lower as compared to the third state.

Abstract: According to one embodiment, an information processing apparatus includes a processor, a non-volatile storage unit, a receiving unit, a judging unit, and a transmitting unit. The receiving unit receives from the processor an inquiry about accessibility of the storage unit. The judging unit judges, upon receipt of the inquiry, whether the storage unit is accessible on the basis of a start-up time period between starting power supply to the storage unit and activation of the storage unit. The transmitting unit transmits a judgment result obtained by the judging unit to the processor.

Abstract: According to one embodiment, an information processing apparatus includes a processor, a non-volatile storage unit, a receiving unit, a judging unit, and a transmitting unit. The receiving unit receives from the processor an inquiry about accessibility of the storage unit. The judging unit judges, upon receipt of the inquiry, whether the storage unit is accessible on the basis of a start-up time period between starting power supply to the storage unit and activation of the storage unit. The transmitting unit transmits a judgment result obtained by the judging unit to the processor.

Abstract: According to one embodiment, a controller includes a state detecting unit, a calculating unit, and a determining unit. The state detecting unit detects an idle state in which indicates there are no process that can execute on a processing device capable of performing one or more processes. The calculating unit calculates a resuming time, which indicates a time length until the next process starts, when the state detecting unit detects the idle state. The determining unit determines an operation mode of the processing device on the basis of the resuming time calculated by the calculating unit.

Abstract: According to an embodiment, a control device includes a receiving unit configured to receive an interrupt request requesting an interrupt process to be executed by a processing device that executes one or more processes; a storage unit configured to store therein the interrupt request; a determining unit configured to determine a state of the processing device; a sending unit configured to send the interrupt request to the processing device; and a control unit configured to store the interrupt request received by the receiving unit in the storage unit when the processing device is determined by the determining unit to be in an idle state in which the processing device is not executing the processes and a predetermined condition is not satisfied, and to control the sending unit to send the interrupt request stored in the storage unit to the processing device when the predetermined condition is satisfied.

Abstract: According to an embodiment, an information processing apparatus includes: a first control unit to control a first device; and a second control unit to control a second device. The first control unit includes a first request processing unit, a notification unit, and a first execution unit. The second request processing unit receives a second request including an instruction to start a process of the second device. The notification unit notifies the second control unit that the first control unit receives a first request. The second execution unit executes a second request received by the second request processing unit when the first device is in the active state, and executes the second request stored in the storage unit when the notification is received by the notification receiving unit.

Abstract: According to an embodiment, a control device includes a processor setting unit, a resumption data reading unit, and a resumption processing unit. The processor setting unit is configured to identify, among a plurality of processors included in an information processing system, each of which is connected to one or more memories, a processor connected to a memory storing resumption data for resuming the information processing system and to activate the identified processor, in response to a resumption request for resuming the information processing system from hibernation. The information processing system includes two or more processors each connected with one or more memories. The resumption data reading unit is configured to read the resumption data from the memory that stores the resumption data. The resumption processing unit is configured to resume the information processing system by using the read resumption data.

Abstract: According to an embodiment, an information processing apparatus that includes a processor, has a first control unit, a power storage unit, and a second control unit. The first control unit is configured to control execution of a process by the processor. The power storage unit is configured to store therein power. The second control unit is configured to control reduction of power consumption of the information processing apparatus in a case where there is a process waiting to be executed and an amount of stored power of the power storage unit is equal to or less than a first threshold.

Abstract: A data processing device according to embodiments comprises a data converting unit, a selecting unit, a managing unit, a updating unit, and a controller. The data converting unit is configured to convert update-data for updating at least a part of an electronic paper into processed update-data to be displayed. The selecting unit is configured to select an update-control-information identifier to be used for updating the electronic paper with the processed update-data. The managing unit is configured to store the processed update-data and a selected update-control-information identifier on a first memory. The updating unit is configured to instruct a drawing step of the electronic paper using the processed update-data and the update-control-information identifier stored on the first memory.

Abstract: According to an embodiment, an authority changing device includes a first determiner, a second determiner, and a changing unit. A first authority is defined by a first combination of first to third item values, and a second authority is defined by a second combination of the fourth to sixth item values. The first determiner uses a logical expression to determine whether the change from the first authority to the second authority is possible, not possible, or unknown. The second determiner uses a first table to determine the availability of change from the first authority to the second authority when the availability of the change is determined to be unknown. The changing unit changes the first authority to the second authority when the change is determined to be possible.

Abstract: According to one embodiment, a apparatus includes a first module which stores update information includes position information indicating an update position in the data file in a first storage and data to be updated in a second storage, such that update information items includes the update information are stored in contiguous storage areas of the second storage in the order of request of each of the update information items when the data file is requested to be updated, and a second module which stores the update information items stored in the second storage in free space having contiguous addresses of a third storage, in the order of storing in the second storage, if an amount of the update information items in the second storage exceeds a set volume.

Abstract: According to an embodiment, an information processing apparatus is powered by a power source including a power generation unit and a power storage device that stores power generated by the power generation unit. The information processing apparatus includes a first obtaining, a second obtaining unit, and a first control unit. The first obtaining unit is configured to obtain first information indicating a value of power generated by the power generation unit. The second obtaining unit is configured to obtain second information indicating an value of stored energy in the power storage device. The first control unit is configured to start a process that is set in advance when the value of power indicated by the first information is greater than zero and the value of stored energy indicated by the second information is equal to or greater than a first threshold value.

Abstract: A control device according to embodiments comprises a data-copying unit, a data-processing instructing unit, and a power-control unit. The data-copying unit copies data in a first memory to a second memory of which power consumption is less than power consumption of the first memory. The data is to be processed at a first data processing unit. The data-processing instructing unit instructs the first data processing unit to process the data copied to the second memory. The power-control unit switches power for the first memory from a first power to a second power while the first data processing unit is processing the data copied to the second memory. The first power is power supplied to the first memory at a time when the data is copied from the first memory to the second memory. The second power is lower than the first power.

Abstract: According to an embodiment, an information processing apparatus includes a processor, a first memory, and a power supply controller. The processor is configured to execute a program. The first memory is configured to store therein the program. The power supply controller is configured to stop supplying a power to the first memory when the processor transitions to an idle state where the processor waits for an interrupt, and start supplying the power to the first memory when the processor receives the interrupt in the idle state. When the processor receives the interrupt in the idle state, the processor executes initialization of the first memory to set the first memory into a state where the first memory is accessible from the processor.

Abstract: According to an embodiment, a memory control device controls a memory from/to which data are read/written by a processor. The memory control device includes a clock switcher and a control signal switcher. The clock receives as input a first clock and a second clock at a higher frequency than the first clock, supplies the first clock to the memory until the second clock becomes stable, and supplies the second clock after the second clock has become stable. The a control signal switcher starts supplying, to the memory, a first control signal for initializing the memory to a state allowing reading/writing of data by the processor while the first clock is being supplied to the memory, and supplies, to the memory, a second control signal according to the reading/writing of data by the processor, after the second clock is supplied to the memory and the memory is initialized.

Abstract: According to one embodiment, an information storage medium, and the program comprises referring to a manifest from a playlist that manages playback presentation of a playback presentation object, referring to one of a markup and a script from the manifest, monitoring defining of a name corresponding to an event in the markup, and generation of an event in response to the name corresponding to the event defined in the markup using an event listener in the script, and designating function contents that execute processing when the event is generated.

Abstract: According to one embodiment, there is provided a data processing method. The method includes reading management information indicative of a playback and display procedure, acquiring a content from a certain storage position at a timing determined based on the management information, and performing playback and display of the content at a timing determined based on the management information.

Abstract: According to an embodiment, a state control device controls a state transition of an information processing device. The information processing device includes a processor; a power supply unit; and an electric storage unit. The state control device includes a controller to, when the power amount accumulated in the electric storage unit is decreased to a first power amount while the information processing device is in a first state, cause the information processing device to transit from the first state to a second state in which power consumption of the processor is lower than that in the first state, and to, when the power amount accumulated in the electric storage unit is increased to a second power amount larger than the first power amount while the information processing device is in the second state, cause the information processing device to transit from the second state to the first state.

Abstract: A communication apparatus that encrypts a plurality of pieces that constitute a part of data and transmits the encrypted pieces stores an encrypted piece that is one of the pieces encrypted by another communication apparatus, and first decryption key information used for decrypting the encrypted piece, while keeping the encrypted piece and the first decryption key information in correspondence with each other. Further, the communication apparatus generates temporary information that can be different at each time of generation, further performs an encrypting process on the encrypted piece based on the temporary information, and outputs a new encrypted piece. The communication apparatus transmits the new encrypted piece, the first decryption key information that is stored in correspondence with the encrypted piece, and second decryption key information used for decrypting the encrypting process.