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:
Jul. 24, 2012
Filed:
Feb. 10, 2005
James Stephen Fields, Jr., Austin, TX (US);
Guy Lynn Guthrie, Austin, TX (US);
William John Starke, Round Rock, TX (US);
Jeffrey Adam Stuecheli, Austin, TX (US);
James Stephen Fields, Jr., Austin, TX (US);
Guy Lynn Guthrie, Austin, TX (US);
William John Starke, Round Rock, TX (US);
Jeffrey Adam Stuecheli, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
In a cache coherent data processing system including at least first and second coherency domains, a memory block is stored in a system memory in association with a domain indicator indicating whether or not the memory block is cached, if at all, only within the first coherency domain. A master in the first coherency domain determines whether or not a scope of broadcast transmission of an operation should extend beyond the first coherency domain by reference to the domain indicator stored in the cache and then performs a broadcast of the operation within the cache coherent data processing system in accordance with the determination.