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. 01, 2019
Filed:
Feb. 21, 2017
Applicant:
Advanced Micro Devices, Inc., Sunnyvale, CA (US);
Inventor:
Patrick N. Conway, Sunnyvale, CA (US);
Assignee:
Advanced Micro Devices, Inc., Santa Clara, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 12/128 (2016.01); G06F 12/0811 (2016.01); G06F 12/0815 (2016.01); G06F 12/0888 (2016.01);
U.S. Cl.
CPC ...
G06F 12/0888 (2013.01); G06F 12/0811 (2013.01); G06F 12/128 (2013.01); G06F 12/0815 (2013.01); G06F 2212/1024 (2013.01); G06F 2212/6046 (2013.01);
Abstract
A communication bypass mechanism accelerates cache-to-cache data transfers for communication traffic between caching agents that have separate last-level caches. A method includes bypassing a last-level cache of a first caching agent in response to a cache line having a modified state being evicted from a penultimate-level cache of the first caching agent and a communication attribute of a shadow tag entry associated with the cache line being set. The communication attribute indicates prior communication of the cache line with a second caching agent having a second last-level cache.