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. 30, 2014
Filed:
Sep. 16, 2011
Daniel J. Post, Cupertino, CA (US);
Vadim Khmelnitsky, Foster City, CA (US);
Daniel J. Post, Cupertino, CA (US);
Vadim Khmelnitsky, Foster City, CA (US);
Apple Inc., Cupertino, CA (US);
Abstract
Systems and methods are disclosed for efficient buffering for a system having non-volatile memory ('NVM'). A tree can be stored in volatile memory that includes a logical-to-physical mapping between a logical space and physical addresses of the NVM. When the amount of memory available for the tree is below a pre-determined threshold, a system can attempt to reduce the number of data fragments in the NVM, and consequently flatten a portion of the tree. The NVM interface may select an optimal set of entries of the tree to combine. Any suitable approach can be used such as, for example, moving one or more sliding windows across the tree, expanding a sliding window when a condition has been satisfied, using a priority queue while scanning the tree, and/or maintaining a priority queue while the tree is being updated.