Method and apparatus for efficient virtual memory management

Details Method and apparatus for efficient virtual memory management Method and apparatus for efficient virtual memory management

2005-04-26

2005-04-26

Ellis, Kevin (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Control technique

C711S143000, C711S165000, C709S241000

Reexamination Certificate

active

06886085

ABSTRACT:
A method and an apparatus that improves virtual memory management. The proposed method and apparatus provides an application with an efficient channel for communicating information about future behavior of an application with respect to the use of memory and other resources to the OS, a paging daemon, and other system software. The state of hint bits, which are integrated into page table entries and TLB entries and are used for communicating information to the OS, can be changed explicitly with a special instruction or implicitly as a result of referencing the associated page. The latter is useful for canceling hints. The method and apparatus enables memory allocators, garbage collectors, and compilers (such as those used by the Java platform) to use a page-aligned heap and a page-aligned stack to assist the OS in effective management of memory resources. This mechanism can also be used in other system software.

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IBM TDB-NB900176, Compiler and Run-Time Hints for Memory, IBM Technical Bulletin, vol. 32, Issue No. 8B, Page No. 76-77, Jan. 1, 1990.

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