Dynamic resource pool expansion and contraction in multiprocessi

Details Dynamic resource pool expansion and contraction in multiprocessi Dynamic resource pool expansion and contraction in multiprocessi

1989-06-26

1992-03-03

Lee, Thomas C.

Boots, shoes, and leggings

3642300, 3642386, 3642450, 3642455, 364DIG1, G06F 1200

Patent

active

050939122

ABSTRACT:
A method for expanding and contracting a resource pool dynamically, i.e. in response to demand for the resources, is disclosed. Resources are allocated for use from a single master pool 22. The overall pool of available resources is expanded by creating an extension pool and adding its resources to the master pool. The master pool can theoretically be expanded to the limits of the number of resources available in the system.
To contract the pool dynamically, first one of the extension pools is selected to be freed (FREE.sub.-- POOL 66). Those resources owned by the freed pool but still in the master pool (i.e., not in use) are moved to the extension pool, preventing their reuse. Resources in use which are owned by the freed pool are labeled by changing their home address 52 so that they will be returned to the extension pool instead of to the master pool. Once all such resources have been returned to the freed extension pool it is deleted, thereby contracting the overall pool of resources.
Pseudocode implementations of the procedures for manipulating storage buffers and buffer pools are included.

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