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:
May. 03, 2016
Filed:
Jun. 11, 2014
Applicant:
Vmware, Inc., Palo Alto, CA (US);
Inventors:
Assignee:
VMware, Inc., Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G06F 12/08 (2006.01); G06F 12/10 (2016.01); G06F 12/12 (2016.01); G06F 9/50 (2006.01); G06F 9/455 (2006.01);
U.S. Cl.
CPC ...
G06F 12/1009 (2013.01); G06F 9/45558 (2013.01); G06F 9/5077 (2013.01); G06F 12/1027 (2013.01); G06F 12/12 (2013.01); G06F 2212/652 (2013.01); G06F 2212/657 (2013.01);
Abstract
Large pages that may impede memory performance in computer systems are identified. In operation, mappings to selected large pages are temporarily demoted to mappings to small pages and accesses to these small pages are then tracked. For each selected large page, an activity level is determined based on the tracked accesses to the small pages included in the large page. By strategically selecting relatively low activity large pages for decomposition into small pages and subsequent memory reclamation while restoring the mappings to relatively high activity large pages, memory consumption is improved, while limiting performance impact attributable to using small pages.