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:
Apr. 19, 2011
Filed:
Jul. 19, 2007
Michael K Fertig, Sunnyvale, CA (US);
Patrick Conway, Los Altos, CA (US);
Kevin Michael Lepak, Austin, TX (US);
Cissy Xumin Yuan, Sunnyvale, CA (US);
Michael K Fertig, Sunnyvale, CA (US);
Patrick Conway, Los Altos, CA (US);
Kevin Michael Lepak, Austin, TX (US);
Cissy Xumin Yuan, Sunnyvale, CA (US);
Globalfoundries Inc., Grand Cayman, KY;
Abstract
A system and method for pre-fetching data from system memory. A multi-core processor accesses a cache hit predictor concurrently with sending a memory request to a cache subsystem. The predictor has two tables. The first table is indexed by a portion of a memory address and provides a hit prediction based on a first counter value. The second table is indexed by a core number and provides a hit prediction based on a second counter value. If neither table predicts a hit, a pre-fetch request is sent to memory. In response to detecting said hit prediction is incorrect, the pre-fetch is cancelled.