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:
Mar. 18, 2014
Filed:
Apr. 13, 2009
Mahadev S. Deshpande, Fort Collins, CO (US);
Ronny L. Arnold, Fort Collins, CO (US);
Josef A. Dvorak, Fort Collins, CO (US);
Paul L. Rogers, Fort Collins, CO (US);
Mahadev S. Deshpande, Fort Collins, CO (US);
Ronny L. Arnold, Fort Collins, CO (US);
Josef A. Dvorak, Fort Collins, CO (US);
Paul L. Rogers, Fort Collins, CO (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
A prefetch device and method are disclosed that determines from which addresses to speculatively fetch data based on information collected regarding previous cache-miss addresses. A historical record showing a propensity to experience cache-misses at a particular address-offset from a prior cache-miss address within a region of memory provides an indication that data needed by future instructions has an increased likelihood to be located at a similar offset from a current cache-miss address. The prefetch device disclosed herein maintains a record of the relationship between a cache-miss address and subsequent cache-miss addresses for the most recent sixty-four unique data manipulation instructions that resulted in a cache-miss. The record includes a weighted confidence value indicative of how many cache-misses previously occurred at each of a selection of offsets from a particular cache-miss address.