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. 13, 2005
Filed:
Aug. 23, 2002
Vladimir Pentkovski, Folsom, CA (US);
Vivek Garg, Folsom, CA (US);
Narayanan S. Iyer, Folsom, CA (US);
Jagannath Keshava, Folsom, CA (US);
Vladimir Pentkovski, Folsom, CA (US);
Vivek Garg, Folsom, CA (US);
Narayanan S. Iyer, Folsom, CA (US);
Jagannath Keshava, Folsom, CA (US);
Intel Corporation, Santa Clara, CA (US);
Abstract
A method and apparatus for shared cache coherency for a chip multiprocessor or a multiprocessor system. In one embodiment, a multicore processor includes a plurality of processor cores, each having a private cache, and a shared cache. An internal snoop bus is coupled to each private cache and the shared cache to communicate data from each private cache to other private caches and the shared cache. In another embodiment, an apparatus includes a plurality of processor cores and a plurality of caches. One of the plurality of caches maintains cache lines in two different modified states. The first modified state indicates a most recent copy of a modified cache line, and the second modified state indicates a stale copy of the modified cache line.