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. 11, 2010
Filed:
Nov. 16, 2004
Peter A. Franaszek, Mount Kisco, NY (US);
Steven R. Kunkel, Rochester, MN (US);
Luis Alfonso Lastras Montaño, Cortlandt Manor, NY (US);
Aaron C. Sawdey, Cannon Falls, MN (US);
Peter A. Franaszek, Mount Kisco, NY (US);
Steven R. Kunkel, Rochester, MN (US);
Luis Alfonso Lastras Montaño, Cortlandt Manor, NY (US);
Aaron C. Sawdey, Cannon Falls, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
We present a 'directory extension' (hereinafter 'DX') to aid in prefetching between proximate levels in a cache hierarchy. The DX may maintain (1) a list of pages which contains recently ejected lines from a given level in the cache hierarchy, and (2) for each page in this list, the identity of a set of ejected lines, provided these lines are prefetchable from, for example, the next level of the cache hierarchy. Given a cache fault to a line within a page in this list, other lines from this page may then be prefetched without the substantial overhead to directory lookup which would otherwise be required.