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. 21, 2011
Filed:
Dec. 12, 2007
Chung-lung Kevin Shum, Wappingers Falls, NY (US);
Kathryn Marie Jackson, Poughkeepsie, NY (US);
Charles Franklin Webb, Wappingers Falls, NY (US);
Chung-Lung Kevin Shum, Wappingers Falls, NY (US);
Kathryn Marie Jackson, Poughkeepsie, NY (US);
Charles Franklin Webb, Wappingers Falls, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Software indicates to hardware of a processing system that its storage modification to a particular cache line is done, and will not be doing any modification for the time being. With this indication, the processor actively releases its exclusive ownership by updating its line ownership from exclusive to read-only (or shared) in its own cache directory and in the storage controller (SC). By actively giving up the exclusive rights, another processor can immediately be given exclusive ownership to that said cache line without waiting on any processor's explicit cross invalidate acknowledgement. This invention also describes the hardware design needed to provide this support.