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:
Jul. 29, 2003
Filed:
Jul. 20, 2000
Bernd Lamparter, Heidelberg, DE;
International Business Machines Corporation, Armonk, NY (US);
Abstract
A self-adapting method and apparatus for determining an efficient cache line replacement algorithm for selecting which objects (or lines) are to be evicted from the cache. Objects are prioritized based upon weights which are determined dynamically for each object. The object weights depend on a first attribute L for each cache object and a first control parameter P which determines the influence of the first attribute L on the weights. The hit rate of the cache memory is observed during a first interval of time while the control parameter is set to a first value. The control parameter is adjusted and the hit rate is observed during a second interval of time. The control parameter is then adjusted an incremental amount having a magnitude and direction determined based on whether the hit rate improved or was reduced. The control parameter may be continuously and automatically adjusted based on observed hit rates and the algorithm may include additional control parameters associated with other object attributes, which are adjusted in a similar manner.