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:
Feb. 11, 2003
Filed:
Dec. 22, 1999
Stephen S. Chang, Glendora, CA (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
Cache states for cache coherency protocols for a multiprocessor system are described. Some embodiments described include a multiprocessor computer system comprising a plurality of cache memories to store a plurality of cache lines and state information for each one of the cache lines. The state information comprises data representing a first state selected from the group consisting of a Shared-Update state, a Shared-Respond state and an Exclusive-Respond state. The multiprocessor computer system further comprises a plurality of processors with at least one cache memory associated with each one of the plurality of processors. The multiprocessor computer system further comprises a system memory shared by the plurality of processors, and at least one bus interconnecting the system memory with the plurality of cache memories and the multiple processors. In some embodiments, one or more of the states (a Shared-Update state, a Shared-Respond state or an Exclusive-Respond state) are implemented in conjunction with the states of the MESI protocol.