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. 24, 1996
Filed:
Oct. 20, 1994
Wayne M Cardoza, Amherst, NH (US);
Digital Equipment Corporation, Maynard, MA (US);
Abstract
A network of processors synchronize modification of a common data structure stored in an asymmetric reflective memory by using a queue. A first processor stores a queue element in a global write-only address space of the reflective memory, the reflective memory to copy the queue element to a local read/write address space of a second processor. The first processor also stores a queue header in the global write-only address space. In response to detecting the queue element, the second processor reads the queue header and then overwrites the queue header with a zero. The reading and writing of the queue header are performed atomically in the local read/write address space of the second processor. The second processor processes the queue element, and marks the queue element as processed in the global address space of the reflective memory.