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:
May. 22, 2001
Filed:
Aug. 31, 1998
Applicant:
Inventors:
Raymond J. Eberhard, Endicott, NY (US);
Eddie Wong, Apalachin, NY (US);
Vincent P. Zeyak, Jr., Apalachin, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 1/200 ; G06F 1/300 ;
U.S. Cl.
CPC ...
G06F 1/200 ; G06F 1/300 ;
Abstract
A memory coherency controller. Responsive to a request including a request type and request memory address, relevant queues are examined for queued addresses matching the request memory address. Responsive to a request memory address matching at least one of the queued addresses, the request is rejected. Following a retry latency, the request is retried. When the address of a read request matches queued address in a store queue, at least one request in the store queue is prioritized higher than all other queued requests.