Multiprocessor system having distributed shared resources and dy

Details Multiprocessor system having distributed shared resources and dy Multiprocessor system having distributed shared resources and dy

Filed on

1991-02-25

Date issued

1993-12-28

Examiner

Rudolph, Rebecca L.

Patent Class

Boots, shoes, and leggings

Other Related Categories

364DIG1, 364243, 364246, 3642431, 3642551, 3642557, G06F 1200

Type

Patent

Status

active

Patent number

052747891

Description

ABSTRACT:
Multiprocessor system having distributed shared resources and dynamical and selective global data replication in which a plurality of processors communicate each with the other through a sytem bus. Each CPU is provided with a local memory storing data used locally and global data shareable by a plurality of processes operative in differing CPUs and therefore replicated in the local memory of each CPU. The global data replication is performed, at page level, only when a global data page is effectively needed by a plurality of processes operative in differing CPUs and in those CPUs where the page is needed, the replication in the other CPUs being performed in a predetermined trash page of the local memory so that memory space required for replication is minimized, as is traffic on the system bus for global data replication and global data writes required for assuring global data consistency.

REFERENCES:
patent: 4928224 (1990-05-01), Zulian
patent: 4951193 (1990-08-01), Muramatsu et al.
patent: 5055999 (1991-10-01), Frank et al.
Kessler et al., "An Analysis of Distributed Shared Memory Algorithms", The 9th International Conf. on Distributed Computing Systems, Jun. 9, 1989.
Swan, R. J. et al., "The Implementation of the Cm* Multi-Microprocessor", Proc. of the National Computer Conference, Dallas, Jun. 13-16, 1977.
Scheurich, C. et al. "Dynamic Page Migration in Multiprocessors with Distributed Global Memory", IEEE Trans. on Comp. V38 1N.8 p. 1154.
Fleisch, Brett D. "Distributed Shared Memory in a Loosely Coupled Distributed System", Compcon Spring 88, pp. 182-184.

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