The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 28, 1993
Filed:
Feb. 25, 1991
Maria Costa, Buccinasco, IT;
Carlo Leonardi, Legnano, IT;
Bull HN Information Systems Italia S.p.A., Caluso, IT;
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.