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. 01, 2015
Filed:
Dec. 31, 2012
Applicant:
Emc Corporation, Hopkinton, MA (US);
Inventors:
Philippe Armangau, Acton, MA (US);
Chris Seibel, Walpole, MA (US);
John A. Hassey, Durham, NC (US);
Yubing Wang, Southborough, MA (US);
Assignee:
EMC Corporation, Hopkinton, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 12/00 (2006.01); G06F 12/08 (2006.01); G06F 9/52 (2006.01); G06F 12/02 (2006.01);
U.S. Cl.
CPC ...
G06F 12/0875 (2013.01); G06F 9/526 (2013.01); G06F 12/0261 (2013.01);
Abstract
A technique for managing resources on a storage array having multiple CPU cores releases share locks on a resource by decrementing share lock counters associated with the CPU cores that release the share locks, regardless of whether these are the same as the CPU cores that acquired the share locks. As each CPU core changes its own share lock counter, cache trashing caused by changing share lock counters associated with other CPU cores can be avoided.