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:
Jun. 28, 2016
Filed:
Mar. 31, 2015
Emc Corporation, Hopkinton, MA (US);
Ruiling Dou, Shanghai, CN;
Feng Zhang, Shanghai, CN;
Ying Hu, Northborough, MA (US);
Gong Chen, Beijing, CN;
Hao Pan, Shanghai, CN;
EMC Corporation, Hopkinton, MA (US);
Abstract
Improved techniques of implementing range lock involve granting a sleeping thread access to an address range when no conflicts exist with earlier pending requests as well as with already granted requests. Along these lines, a current child thread that has a conflict with a parent thread that currently holds a range lock on a range of bytes during a read/write operation will be awoken from waiting state when the parent thread has completed its access and releases its lock. In response, the processor compares the range to which the current child thread request access with the ranges to which other sleeping threads request access. However, the comparisons are only performed in connection with (i) requests that arrived prior to the current child thread and (ii) other granted requests.