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:
Dec. 17, 2013
Filed:
Mar. 07, 2011
Martin T. Pohlack, Dresden, DE;
Michael P. Hohmuth, Dresden, DE;
Stephan Diestelhorst, Dresden, DE;
David S. Christie, Austin, TX (US);
Jaewoong Chung, Bellevue, WA (US);
Martin T. Pohlack, Dresden, DE;
Michael P. Hohmuth, Dresden, DE;
Stephan Diestelhorst, Dresden, DE;
David S. Christie, Austin, TX (US);
Jaewoong Chung, Bellevue, WA (US);
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Abstract
A system and method are disclosed for allowing protection of larger areas than memory lines by monitoring accessed and dirty bits in page tables. More specifically, in some embodiments, a second associative structure with a different granularity is provided to filter out a large percentage of false positives. By providing the associative structure with sufficient size, the structure exactly specifies a region in which conflicting cache lines lie. If entries within this region are evicted from the structure, enabling the tracking for the entire index filters out a substantial number of false positives (depending on a granularity and a number of indices present). In some embodiments, this associative structure is similar to a translation look aside buffer (TLB) with 4 k, 2M entries.