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:
Jun. 13, 2006
Filed:
Feb. 07, 2002
Peter L. Fu, Sunnyvale, CA (US);
Peter L. Fu, Sunnyvale, CA (US);
Sun Microsystems, Inc., Santa Clara, CA (US);
Abstract
A method is described for protecting dirty data in cache memories in a cost-effective manner. When an instruction to write data to a memory location is received, and that memory location is being cached, the data is written to a plurality of cache lines, which are referred to as duplicate cache lines. When the data is written back to memory, one of the duplicate cache lines is read. If the cache line is not corrupt, it is written back to the appropriate memory location and marked available. In one embodiment, if more duplicate cache lines exist, they are invalidated. In another embodiment, the other corresponding cache lines may be read for the highest confidence of reliability, and then marked clean or invalid.