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:
Aug. 16, 2011
Filed:
Jan. 29, 2008
Sebastian C. Burckhardt, Sammamish, WA (US);
Arthur J. O'neill, Wappingers Falls, NY (US);
Vesselina K. Papazova, Highland, NY (US);
Craig R. Walters, Highland, NY (US);
Sebastian C. Burckhardt, Sammamish, WA (US);
Arthur J. O'Neill, Wappingers Falls, NY (US);
Vesselina K. Papazova, Highland, NY (US);
Craig R. Walters, Highland, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method and apparatus in which the observability of cross-invalidates requests within remote nodes is controlled at the time of a partial response generation, when a remote request initially checks/snoops the directory state of the remote node, but before such the time that the cross-invalidate request is actually sent to the processors on a given node. If all of the remote nodes in the system indicate that the cross-invalidates could be sent during an initial directory snoop, the requesting node is able to return full exclusivity to a given cache line to a requesting processor at the time when it receives all of the partial responses, instead of having to wait for the final responses from each of the remote nodes within the system.