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:
Jun. 10, 2008
Filed:
Apr. 28, 2006
John Carter, Salt Lake City, UT (US);
Randal S. Passint, Chippewa Falls, WI (US);
Liqun Cheng, Salt Lake City, UT (US);
Donglai Dai, Eau Claire, WI (US);
John Carter, Salt Lake City, UT (US);
Randal S. Passint, Chippewa Falls, WI (US);
Liqun Cheng, Salt Lake City, UT (US);
Donglai Dai, Eau Claire, WI (US);
Silicon Graphics, Inc., Sunnyvale, CA (US);
Abstract
An apparatus and method of controlling data sharing in a shared memory computer system transfers control of a cache coherency directory (entry) to a node having control of the data. Specifically, the plurality of nodes includes a home node and a second node. The home node has given data in a cache line in its memory, and also has a directory identifying the state of the cache line. The method and apparatus thus detect a request for ownership of the cache line from the second node, and enable the second node to control the directory after receipt of the request.