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:
May. 31, 2005
Filed:
Oct. 24, 2002
John T. Robinson, Yorktown Heights, NY (US);
Robert B. Tremaine, Stormville, NY (US);
Michael E. Wazlowski, New Fairfield, CT (US);
John T. Robinson, Yorktown Heights, NY (US);
Robert B. Tremaine, Stormville, NY (US);
Michael E. Wazlowski, New Fairfield, CT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for selecting a line to replace in an inclusive set-associative cache memory system which is based on a least recently used replacement policy but is enhanced to detect and give special treatment to the reloading of a line that has been recently cast out. A line which has been reloaded after having been recently cast out is assigned a special encoding which temporarily gives priority to the line in the cache so that it will not be selected for replacement in the usual least recently used replacement process. This method of line selection for replacement improves system performance by providing better hit rates in the cache hierarchy levels above, by ensuring that heavily used lines in the levels above are not aged out of the levels below due to lack of use.