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:
Apr. 29, 2008
Filed:
Jun. 30, 2003
Robert E. Cypher, Saratoga, CA (US);
David A. Wood, Madison, WA (US);
Mark D. Hill, Madison, WI (US);
Thomas M. Wicki, Palo Alto, CA (US);
Robert E. Cypher, Saratoga, CA (US);
David A. Wood, Madison, WA (US);
Mark D. Hill, Madison, WI (US);
Thomas M. Wicki, Palo Alto, CA (US);
Sun Microsystems, Inc., Santa Clara, CA (US);
Abstract
A computer system may include a system memory, an active device configured to access data stored in the system memory, where the active device includes a cache configured to store data accessed by the active device, an address network for conveying address packets between the active device and the system memory, and a data network for conveying data packets between the active device and the system memory. An access right corresponding to a given block allocated in the cache transitions in response to a corresponding data packet being received by the cache. An ownership responsibility for the given block transitions in response to a corresponding address packet being received by the cache. The access right transitions at a different time than the ownership responsibility transitions. The cache is configured to inhibit receipt of the corresponding data packet based on a value of a timestamp associated with the corresponding data packet.