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. 28, 2008
Filed:
Jul. 14, 2006
Pradip Bose, Yorktown Heights, NY (US);
Zhigang HU, Ossining, NY (US);
Xiaodong LI, Longmont, CO (US);
Jude A. Rivers, Cortlandt Manor, NY (US);
Pradip Bose, Yorktown Heights, NY (US);
Zhigang Hu, Ossining, NY (US);
Xiaodong Li, Longmont, CO (US);
Jude A. Rivers, Cortlandt Manor, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A write filter cache system for protecting a microprocessor core from soft errors and method thereof are provided. In one aspect, data coming from a processor core to be written in primary cache memory, for instance, L1 cache memory system, is buffered in a write filter cache placed between the primary cache memory and the processor core. The data from the write filter is move to the main cache memory only if it is verified that main thread's data is soft error free, for instance, by comparing the main thread's data with that of its redundant thread. The main cache memory only keeps clean data associated with accepted checkpoints.