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:
Oct. 01, 2013
Filed:
Aug. 24, 2011
Ramaswamy Sivaramakrishnan, San Jose, CA (US);
Aaron S. Wynn, San Jose, CA (US);
Connie Wai Mun Cheung, Sunnyvale, CA (US);
Satarupa Bose, San Jose, CA (US);
Ramaswamy Sivaramakrishnan, San Jose, CA (US);
Aaron S. Wynn, San Jose, CA (US);
Connie Wai Mun Cheung, Sunnyvale, CA (US);
Satarupa Bose, San Jose, CA (US);
Oracle International Corporation, Redwood Shores, CA (US);
Abstract
A cache memory system includes a cache controller and a cache tag array. The cache tag array includes one or more ways, one or more indices, and a cache tag entry for each way and index combination. Each cache tag entry includes an error correction portion and an address portion. In response to an address request for data that includes a first index and a first address, the cache controller compares the first address to the cache tag entries of the cache tag array that correspond to the first index. When the comparison results in a miss, the cache controller corrects cache tag entries with an error that correspond to the first index using the corresponding error correction portions, and stores at least one of the corrected cache tag entries in a storage that is external to the cache tag array. The cache controller, for each corrected cache tag entry, replays the comparison using the least one of the externally stored corrected cache tag entries.