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:
May. 24, 1988
Filed:
Mar. 27, 1987
Paul K Rodman, Ashland, MA (US);
Prime Computer, Inc., Natick, MA (US);
Abstract
A cache coherence system for a multiprocessor system including a plurality of data processors coupled to a common main memory. Each of the data processors includes an associated cache memory having storage locations therein corresponding to storage locations in the main memory. The cache coherence system for a data processor includes a cache invalidate table (CIT) memory having internal storage locations corresponding to locations in the cache memory of the data processor. The cache coherence system detects when the contents of storage locations in the cache memories of the one or more of the data processors have been modified in conjuction with the activity those data processors and is responsive to such detections to generate and store in its CIT memory a multiple element linked list defining the locations in the cache memories of the data processors having modified contents. Each element of the list defines one of those cache storage locations and also identifies the location in the CIT memory of the next element in the list.