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Небесная энциклопедия

Космические корабли и станции, автоматические КА и методы их проектирования, бортовые комплексы управления, системы и средства жизнеобеспечения, особенности технологии производства ракетно-космических систем

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20-07-2006 дата публикации

Multiple contexts for efficient use of translation lookaside buffer

Номер: US20060161760A1
Автор: Paul Jordan, William Kucharski, Roman Zajcew, Ashley Saulsbury, Quinn Jacobson
Принадлежит: Sun Microsystems, Inc.

The present invention provides a method and apparatus for increased efficiency for translation lookaside buffers by collapsing redundant translation table entries into a single translation table entry (TTE). In the present invention, each thread of a multithreaded processor is provided with multiple context registers. Each of these context registers is compared independently to the context of the TTE. If any of the contexts match (and the other match conditions are satisfied), then the translation is allowed to proceed. Two applications attempting to share one page but that still keep separate pages can then employ three total contexts. One context is for one application's private use; one of the contexts is for the other application's private use; and a third context is for the shared page. In one embodiment of the invention, two contexts are implemented per thread. However, the teachings of the present invention can be extended to a higher number of contexts per thread.

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Номер записи: 1
24-02-2009 дата публикации

Modeling operating system instances

Номер: US0007496743B1
Автор: Arthur Salazar, Boman Irani, Roman Zajcew, Scott Carter, David L. Isaman, David Nielsen, SALAZAR ARTHUR, IRANI BOMAN, ZAJCEW ROMAN, CARTER SCOTT, ISAMAN DAVID L, NIELSEN DAVID, ISAMAN DAVID L.
Принадлежит: Sun Microsystems, Inc., SUN MICROSYSTEMS INC, SUN MICROSYSTEMS, INC.

A method and mechanism for managing operating system instances in a computing system. A computing system is configured to enable users to model and manage operating system instances. One or more defined operating system instances may be created and stored for future use. Each of the defined operating system instances may include a description of required resources. In addition, the definition of desired and/or optimal resources may be specified. In response to an attempt to realize an operating system instance, a determination is made as to whether resources allocated for the operating system instance are adequate. If the allocated resources are inadequate, further resources may be allocated. In addition, a determination may be made as to whether a standby mode is indicated for the operating system instance. If a standby mode is indicated, the operating system instance may be realized but not booted.

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Номер записи: 2