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. 01, 2003
Filed:
May. 22, 2000
Caroline D. Benveniste, New York, NY (US);
Peter A. Franaszek, Kisco, NY (US);
John T. Robinson, Yorktown Heights, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
In a computer system having a processor, a memory system including multiple levels of caches L , L , . . . , L and including main memory L , and in which the cache L includes lines of size s and the cache L includes lines of size t with t>s, a dual line size cache directory mechanism, in which the contents of a cache L may be accessed at line size granularity s (in which case it is determined whether a line corresponding to a given memory address is stored in L , and if so its location and status), and in which the contents of L may also be accessed at line size granularity t (in which case it is determined whether any of the t/s lines of size s residing in the larger line of size t corresponding to a given memory address are stored in L , and if so their locations and status) without multiple sequential accesses to a cache L directory structure.