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:
Feb. 15, 2011
Filed:
Dec. 19, 2006
Leo J. Clark, Georgetown, TX (US);
James S. Fields, Jr., Austin, TX (US);
Pak-kin Mak, Poughkeepsie, NY (US);
William J. Starke, Round Rock, TX (US);
Leo J. Clark, Georgetown, TX (US);
James S. Fields, Jr., Austin, TX (US);
Pak-Kin Mak, Poughkeepsie, NY (US);
William J. Starke, Round Rock, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system and method for implementing an enhanced hover state with active prefetches. According to a preferred embodiment of the present invention, a snooper in a processing unit receives a system-wide update complete operation indicating a completion of a storage-modifying operation targeting a particular address, where the storage-modifying operation results in a modified first cache line in a first cache memory. The snooper determines if a second cache memory held a second cache line associated with the particular address prior to receiving the system-wide update complete operation. If so, the snooper issues a prefetch request for a copy of the modified first cache line to replace the second cache line in the second cache memory. The snooper updates the second cache memory with a copy of the modified first cache line.