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. 10, 2011
Filed:
Mar. 07, 2007
Philip George Emma, Danbury, CT (US);
Wing K. Luk, Chappaqua, NY (US);
Thomas R. Puzak, Ridgefield, CT (US);
Vijayalakshmi Srinivasan, New York, NY (US);
Philip George Emma, Danbury, CT (US);
Wing K. Luk, Chappaqua, NY (US);
Thomas R. Puzak, Ridgefield, CT (US);
Vijayalakshmi Srinivasan, New York, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system and method of providing a cache system having a store-in policy and affording the advantages of store-in cache operation, while simultaneously providing protection against soft-errors in locally modified data, which would normally preclude the use of a store-in cache when reliability is paramount. The improved store-in cache mechanism includes a store-in L1 cache, at least one higher-level storage hierarchy; an ancillary store-only cache (ASOC) that holds most recently stored-to lines of the store-in L1 cache, and a cache controller that controls storing of data to the ancillary store-only cache (ASOC) and recovering of data from the ancillary store-only cache (ASOC) such that the data from the ancillary store-only cache (ASOC) is used only if parity errors are encountered in the store-in L1 cache.