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:
Mar. 14, 2000
Filed:
Mar. 19, 1997
Hitachi, Ltd., Tokyo, JP;
Abstract
Information indicative of whether each processor unit caches data which belongs to each of the plural areas of the main memory larger than a cache line is stored in the multicast table. The destinations of a coherent processing request which should be sent to other processor units are limited by the information stored in this table. The interconnection network broadcasts the request to the limited destinations. When the processor unit of the destination of this processing request sends back a cache status of the data designated by the request, it also sends back the caching status in the processor unit concerning a specific memory area which includes the data. Depending on this send back, the request source processor unit renews a portion relating to the destination processor unit within the caching status concerning that specific memory area stored in the processor unit.