Fujitsu Corporation

Satoshi Kazama

Yoshiyasu Nakashima

Koichi Yokota

Hiroshi Yamada

Isamu Yamada

Hideyuki Motoyama

Shinichi Shiotsu

Yasushi Hara

Shinya Kuwamura

Akira Shiba

Hideki Tanaka

Yuki Tamura

Junji Ogawa

Eiji Yoshida

Hiroyoshi Kodama

Masatomo Yasaki

Jun Kawai

Atsushi Yamaguchi

Toshiya Miyazaki

Shinichi Yoshimoto

Shigehiro Idani

Seiki Shibata

An information processing apparatus including: a first management data storing region that stores a plurality of first links being provided one for each of multiple calculating cores and representing an order of migration of pages of a page group allocated to the calculating core among a plurality of the pages; a second management data storing region that stores a second link being provided for an operating system and managing a plurality of pages selected in accordance with the order of migration among the page group of the plurality of first links as a group of candidate pages to be migrated to the second memory; and a migration processor that migrates data of a page selected from the group of the second link from the first memory to the second memory. With this configuration, occurrence of a spinlock is reduced, so that the load on processor is reduced.

Information processing apparatus, computer-readable recording medium having stored therein memory control program, and computer-readable recording medium having stored therein information processing program

An analysis device configured to be connected to an information processing apparatus configured to mount a first memory and a low-speed second memory, the low-speed second memory being cheaper and having lower performance than the first memory and being used for memory capacity expansion, the analysis device being configured to perform program instructions including: causing the information processing apparatus to execute a plurality of types of performance evaluation application programs and acquire memory performance characteristic information regarding each performance evaluation application program from the information processing apparatus; determining a recommended memory configuration according to the performance evaluation application program corresponding to the application to be evaluated program among the plurality of types of performance evaluation application programs by using a collection result of the memory performance characteristic information; and outputting recommended memory configuration information indicating the recommended memory configuration to an output destination.

Analysis device, non-transitory computer-readable storage medium for analysis program, and computer system

An information processing system includes a first processor, a second processor, a first buffer circuit, a second buffer circuit, and a first memory, wherein the first processor is configured to generate a first read command specifying a first data stored in a first address area of the first memory, the second processor is configured to, based on the first read command, generate a second read command specifying a second data stored in a second address area of the first memory, the first buffer circuit is configured to store the first read command, the second buffer circuit is configured to store the second read command, the second processor is configured to execute the first read command stored in the first buffer circuit, and the second processor is configured to execute the second read command stored in the second buffer circuit when the first buffer circuit is in an empty state.

Information processing system

A memory control apparatus includes a first memory, a second memory, a third memory, and a processor configured to add, to management information, first identification information and information indicating a position where first data is stored when the first data is stored in the first memory, add, to the management information, the first identification information and information indicating a position where second data is stored when the second data is stored in the second memory, add, to the management information, second identification information and information indicating a position where third data is stored when the third data is stored in the third memory, determine which one of the first identification information and the second identification information is associated with fourth data, and perform retrieval of the fourth data from the first memory or the second memory in accordance with information indicating a position where the fourth data is stored.

Memory control apparatus and memory control method for swapping data based on data characteristics

An information processing apparatus includes: a first memory including a semiconductor device memory; a second memory including a cache memory, the second memory being configured to temporarily store data to be written in the semiconductor device memory; and a processor configured to execute a writing-back process that includes providing a notification regarding completion of writing of the data before the data stored in the second memory is written in the first memory, execute an alternative writing process that includes writing the data at a second physical address in the first memory when writing of the data at a first physical address in the first memory is failed, and execute an access process that includes accessing the data written at the second physical address based on address management information, the address management information indicating a correspondence between the first physical address and the second physical address.

Information processing apparatus, information processing method, and non-transitory computer-readable storage medium for storing program of access control with respect to semiconductor device memory

An information processing apparatus includes a memory and a processor and accesses a first storage device and a second storage device wherein an access speed of the second storage device is higher than an access speed of the first storage device. The memory stores information relating to a request in a request from the information processing apparatus to the second storage device. The processor, which is connected to the memory, determines a load on the second storage device based on the information relating to the request.

Apparatus and method for routing access based on device load

An access control method includes: determining a number of a plurality of commands to be continuously transferred; transferring to a storage device, a transfer preparation completion command indicating that preparation for transfer of the plurality of commands is completed, when it is determined that the number is greater than or equal to a threshold value; transferring, in sequence, to the storage device, the plurality of commands when it is determined that the number is less than the threshold value; when a command transferred from the host device is the transfer preparation completion command, issuing a direct memory access request to the host device based on the transfer preparation completion command and receiving the plurality of commands transferred from the host device by a direct memory access method based on the direct memory access request; and accessing the storage, based on each of the plurality of commands received.

Access control method, storage device, and system

A method of reading data from a first memory device includes generating a first read command based on a first request which requests to generate the first read command for first data stored in a first address region of the first memory device, generating a second read command for second data stored in a second address region of the first memory device, generating a third read command based on a second request which requests to generate the third read command for third data stored in a third address region of the first memory device, executing the first read command and the third read command to read the first data and the third data, respectively, from the first memory device, and after the executing the first read command and the third read command, executing the second read command to read the second data from the first memory device.

Method of reading data from a memory device and information processing system controlling data reading

The storage device includes multiple NAND devices each of which performs a process on the basis of a command; a command management unit that issues the command from a host to one of the NAND devices specified by the command and that sends an issue completion notification of the issued command to the host; and a state notifying unit that notifies, based on whether each of the NAND devices performs a predetermined process, the host whether each of the NAND devices is ready to accept the command. The host includes a NAND control unit that selects one of the NAND devices that is ready to accept the command based on the notification from the state notifying unit when the issue completion notification is received and sends, to the command management unit, a command to allow the selected one of the NAND devices to perform the process.

Storage system, storage device, and control method of storage system

A load distribution system for allocating a job to one of a plurality of arithmetic devices includes a temperature data acquirer, a candidate selector, and a job allocator. The temperature data acquirer acquires temperature data indicating temperature of each of the plurality of arithmetic devices. The candidate selector selects at least one of the plurality of arithmetic devices as a candidate for a device to which the job is to be allocated. The job allocator allocates the job to the selected candidate.

Load distribution system

In a storage apparatus, a calculation unit calculates first power consumption by adding the power consumption of a first storage device not in use to the total power consumption of a plurality of storage devices in operation, and calculates second power consumption by adding the power consumption of a second storage device not in use to the total power consumption of the plurality of storage devices in operation, and subtracting therefrom the power consumption of one of the plurality of storage devices in operation, from which data is movable to the second storage device. A determination unit determines to activate the first storage device when the second power consumption is not lower than the first power consumption, and determines to activate, the second storage device when the second power consumption is lower than the first power consumption.

Storage apparatus and method of determining device to be activated

An information processing device is provided. The information processing device which operates upon receipt of power supply from a power unit connected to an alternative current power source or from a battery includes an obtaining unit which obtains load information of parts included in the information processing device itself, a deciding unit which decides a voltage value to be supplied by the power unit which supplies electric power to the information processing device, based on the load information obtained by the obtaining unit, and an output unit which outputs a signal relative to the voltage value decided by the deciding unit to the power unit.

Method and system of controlling power supply of an information processing device including load information

An information processing apparatus and method include measuring power consumptions of devices and outputting power consumption data, receiving operational conditions of the devices for measuring the power consumptions of the devices, setting the operational conditions of the devices according to application-setting conditions, and executing an application program to measure reference power consumptions for executing the application program. The information processing apparatus includes a power consumption data-transmitting section transmitting power consumption data, a normalized power consumption-calculating section receiving normalized reference power consumption calculated from reference power consumptions of information processing apparatuses, and calculating normalized power consumption from the normalized reference power consumption and the reference power consumptions.

Power management apparatus and method

A wireless power transmitting system that transmits power from a power transmitting station to a power receiving station wirelessly includes the power receiving station. The power receiving station includes a unit receiving power from the power transmitting station, a unit obtaining a level of power received through the antenna, a unit obtaining a level of power consumed by the device operating while being supplied with received power and a unit transmitting the received power level and the power consuming level to the power transmitting station wirelessly. The power transmitting station includes a unit receiving the received power level and the power consuming level from the power receiving station wirelessly, a unit controlling the level of power transmitted through the transmitting antenna based on the difference between the received power level and the received power consuming level, and a unit transmitting power to the power receiving station wirelessly.

Wireless power transmitting system, power receiving station, power transmitting station, and recording medium

A fan control method performed by a computer having a processor and a fan includes predicting a load of the processor for a job to be executed by referring to a memory that stores information on the load of the processor according to a job type, determining fan rotation control according to a temperature of the processor under the load, and controlling the fan according to the determined fan rotation control.

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Kawasaki, Japan

Satoshi Kazama