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:
Aug. 15, 2000
Filed:
Dec. 26, 1997
Martin Farley, Wellesley, MA (US);
EMC Corporation, Hopkinton, MA (US);
Abstract
A shared resource lock mechanism is provided which enables processors in a multi-processor environment which each share common resources to obtain locks on those resources. The lock mechanism also includes a reserve feature which provides a mechanism for a processor to maintain a lock on a resource for several input/output cycles. The lock mechanism combines the lock feature and the reserve feature in a single structure. This combination allows a processor to manipulate both the lock data and reserve data in a single transaction. Thus, in transactions requiring manipulation of both the lock and reserve elements, overhead is significantly reduced. In addition a unification of software routines which manipulate the lock and reserve data is achieved.