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:
Sep. 27, 2011
Filed:
Oct. 10, 2007
Method for increasing cache directory associativity classes in a system with a register space memory
Duane A. Averill, Rochester, MN (US);
Herman L. Blackmon, Moline, IL (US);
Joseph A. Kirscht, Rochester, MN (US);
David A. Shedivy, Rochester, MN (US);
Duane A. Averill, Rochester, MN (US);
Herman L. Blackmon, Moline, IL (US);
Joseph A. Kirscht, Rochester, MN (US);
David A. Shedivy, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
In a method of managing a cache directory in a memory system, an original system address is presented to the cache directory when corresponding associativity data is allocated to an associativity class in the cache directory. The original system address is normalized by removing address space corresponding to a memory hole, thereby generating a normalized address. The normalized address is stored in the cache directory. The normalized address is de-normalized, thereby generating a de-normalized address, when the associativity data is cast out of the cache directory to make room for new associativity data. The de-normalized address is sent to the memory system for coherency management.