Matsushita Electric Industrial Co., Ltd.

Sony Corporation

Panasonic Corporation

Kiyoshi Owada

Masaya Miyazaki

Katsushige Amano

Tetsuji Yamamoto

Toyoharu Kuroda

Hiroyuki Machida

Takao Shinohara

Susumu Kobayashi

Nobuyuki Enoki

Yoshihiko Motohashi

Seimizu Joukan

Shinsuke Kato

Tomohiro Hirata

The cache memory systemcomprises: a virtual index obtaining unitoperable to obtain, based on a virtual address, virtual indexes of an access-target cache line and a cache line potentially having a cache-aliasing relationship with the access-target cache line; a physical tag obtaining unitoperable to obtain a physical tag of a physical page by performing address translation on the virtual address; and a comparing unitoperable to compare a physical tag TAG obtained by the physical tag obtaining unitwith each tag information piece TAG(i) belonging to cache lines corresponding to the virtual indexes and output from the tag arraybased on the virtual indexes obtained by the virtual index obtaining unit, and determines a cache hit/miss.

Cache memory system

A process scheduling apparatus has a delayed task handling process for processing delayed tasks having variable priorities and multiple other processes for handling processes other than delayed tasks. Fixed priorities are assigned to the other processes. The process scheduler sequentially executes the delayed task handling process and the other processes according the assigned priorities. A delayed task registration processor stores newly generated delayed tasks with assigned priorities in a queuing table. A delayed task priority controller selects the delayed task with the highest priority in the queuing table. A process priority controller sets the priority of the delayed task handling process to the same priority as the priority of the delayed task with the highest priority.

Process scheduling apparatus, process scheduling method, program for process scheduling, and storage medium recording a program for process scheduling

In this system, program data is generated by configuring a plurality of modules based on a relationship between dependence of the modules composing the program. Then, generated two versions of program data is compared starting from a head address of each of the program data, and data at an address, and thereafter, where the data first makes a difference is extracted to generate difference data. Further, a center holds the latest version of program and at least one item of difference data, and transmits the whole data of program or difference data corresponding to a program version in a terminal apparatus, and the program is updated in the terminal apparatus using the received data.

Remote program downloading system

To start up an operating system (OS), CPU performs initializations in three modes: The three modes include a first I/O initialization (Early init) () which is to be done serially when no threads are yet usable, without any advanced technique and with a long wait time until a next operation can be made; a second I/O initialization () which is to be done when threads are usable, in a plurality of steps parallelized with each other using the usable threads according to the dependency relation between devices to be initialized and with synchronization between the steps each by a barrier; and a third I/O initialization (Lazy init) () in which remaining initializations are done in parallel with each other using the threads commensurately to a user process when the user process becomes executable. The present invention is applicable to home-use electric or electronic appliances.

Information processing apparatus for start-up of an operating system using three different initialization modes in a specific sequence

An arithmetic unit includes a switching deviceand a cache controllerThe switching devicedetermines whether desired data to be read by the CPUis in a RAMand allows, depending on a result of the determination, the CPUto directly read the desired data from a ROMThe cache controllercontrols a cacheso that the RAMis initialized based on cache data corresponding to the desired data stored in the cacheIn an arithmetic unit having a CPU, a cache, RAM, and ROM configured in the above manner, the time required for a startup process is reduced.

Arithmetic unit with reduced startup time and method of loading data

The present invention provides an information processor and an information processing method, which reduces the memory capacity and utilizes a free space in a memory area as a cache area for EPG. This information processor includes a program obtaining means a program storage means which has plural storage areas, a program execution means a selection information updating means that stores execution memory information indicating a storage area which contains a program to be executed by the program execution means compression information which indicates compression states of programs stored in the storage areas, and memory relation information which indicates the relation of the plural storage areas, a program execution area switching means for selecting one of the storage areas on the basis of the execution memory information, a storage area switching means for selecting one of the storage areas on the basis of the information in the selection information updating means a program writing means a program compression means a program restoration means for restoring a program which has been compressed by the program compression means and a memory information updating means for updating information stored in the selection information updating means

Information processor and information processing method

A code export symbol offset table A stores sets of the identifier and the offset of the area of a code symbol. In an export symbol import step the identifier that matches the identifier of a symbol is retrieved from the code export symbol offset table A the offset corresponding to the retrieved identifier is extracted, and a predetermined calculation is performed to create an absolute address.

Program linking apparatus for linking and executing one program and another program using a microprocessor and a program linking method thereof

A file management apparatus is used in an information processor using a media exchange type storage device including a plurality of storage media, at least one data access device, and a storage media exchanging means as an external storage device. The file management apparatus includes a data block management device for dividing storage regions of the respective storage media into data blocks of fixed capacity and managing the use states of the divided data blocks. A data block allocation device allocates unused data blocks shown by the data block management device to a file to which a writing request from the information processor has been given.

File management apparatus, file management method, and recording medium containing file management program

A multimedia data reproduction apparatus comprising an optical disk library containing a plurality of optical disks and a plurality of optical disk drives, a file management unit for managing names of motion picture files stored in the respective optical disks, a media management unit for managing whether each of the optical disks is being used or not, a drive management unit for managing whether each of the optical disk drives is being used or not, an open processing unit for deciding whether to accept a request to start reading or reject it according to information from the file management unit, media management unit and the drive management unit, a close processing unit for performing close processing of a motion picture file for which a request to end reading is issued, a data readout control unit for reading motion picture data in response to the request to start reading, and a network control unit for controlling communication between the above-mentioned units and terminal PCs 20. In this apparatus, it is possible to continuously reproduce motion pictures from the optical disk library.

Apparatus for reproducing multimedia data, method for reproducing

A backup unit comprises a first storage means containing at least one program and a setup file in which the operating environment of that program is written; a second storage means used when the first storage means has a fault; a duplication means for duplicating the program and the setup file contained in the first storage means, into the second storage means; and an identifier conversion means for converting identifiers included in the setup file of the first storage means and relating to the first storage means, into identifiers relating to the second storage means, when the duplication is performed. Therefore, when the operation of an information processor is stopped due to a fault in the first storage means, the second storage means enables temporary operation of the information processor. In addition, it is possible to employ, as the second storage means, a recording medium that is lower in price and writing speed than the first storage means.

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Hirakata, Japan

Kiyoshi Owada