System for periodically reallocating page frames in memory based

Details System for periodically reallocating page frames in memory based System for periodically reallocating page frames in memory based

1989-08-03

1990-10-30

Lee, Thomas C.

Boots, shoes, and leggings

364246, 36424612, 3642463, 364262, G06F 1206

Patent

active

049673530

ABSTRACT:
A method for memory management and block paging in a control program that controls the execution of tasks on behalf of a plurality of system computing entities, which selects, transfers blocks of data, such as pages, between storage and memory to maintain in memory only those blocks of data necessary for current system processing requirements. Pages in memory are first identified as not referenced within a preceding time period, for example, since the last examination by a core table scan mechanism, on a system wide basis. Pages so identified are then grouped into blocks of pages used by a computing entity and then transferred to storage for later retrieval as a set when any one of the pages in the set is required by the system. Pages not referenced while resident are made available for paging to memory individually. Block paging achieves a significant reduction in the system overhead associated with memory management, as compared with prior art paging mechanisms. Demand driven systemwide or global least recently used memory management achieves more efficient memory utilization.

REFERENCES:
patent: 3964028 (1976-06-01), Belady et al.
patent: 4035778 (1977-07-01), Ghanem
patent: 4349875 (1982-09-01), Tada
patent: 4394732 (1983-07-01), Swenson
patent: 4422145 (1983-12-01), Secco et al.
patent: 4437155 (1984-03-01), Sawyer et al.
patent: 4499539 (1985-02-01), Vosacek
patent: 4603380 (1986-07-01), Easton et al.
patent: 4603382 (1986-07-01), Cole et al.
patent: 4660130 (1987-04-01), Bartley et al.
patent: 4680703 (1987-07-01), Kriz
patent: 4703422 (1987-10-01), Kinoshita et al.
patent: 4775932 (1988-10-01), Oxley et al.
IBM Virtual Machine/System Product High Performance Option, System Programmer's Guide, Release 4.2, pp. 22-32.

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