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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.:

US 7395380 B1

PDFFull Text
Date of Patent:
Jul. 01, 2008

Filed:

Mar. 20, 2003

Selective snooping by snoop masters to locate updated data

Applicants:

James N. Dieffenderfer, Apex, NC (US);

Bernard C. Drerup, Austin, TX (US);

Jaya P. Ganasan, Youngsville, NC (US);

Richard G. Hofmann, Apex, NC (US);

Thomas A. Sartorius, Raleigh, NC (US);

Thomas P. Speier, Holly Springs, NC (US);

Barry J. Wolford, Austin, TX (US);

Inventors:

James N. Dieffenderfer, Apex, NC (US);

Bernard C. Drerup, Austin, TX (US);

Jaya P. Ganasan, Youngsville, NC (US);

Richard G. Hofmann, Apex, NC (US);

Thomas A. Sartorius, Raleigh, NC (US);

Thomas P. Speier, Holly Springs, NC (US);

Barry J. Wolford, Austin, TX (US);

Assignee:

International Business Machines Corporation, Armonk, NY (US);

Attorneys:

Joscelyn G. Cockburn

James A. Lucas

Driggs, Hogg & Fry Co., LPA

Primary Examiner:

Kevin L Ellis

Assistant Examiner:

Mardochee Chery

Int. Cl.
CPC ...
G06F 12/00 (2006.01); G06F 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A method and structure for snooping cache memories of several snooping masters connected to a bus macro, wherein each non-originating snooping master has cache memory, and wherein some, but less than all the cache memories, may have the data requested by an originating snooping master and wherein the needed data in a non-originating snooping master is marked as updated, and wherein a main memory having addresses for all data is connected to the bus macro. Only those non-originating snooping masters which may have the requested data are queried. All the non-originating snooping masters that have been queried reply. If a non-originating snooping master has the requested data marked as updated, that non-originating snooping master returns the updated data to the originating snooping master and possibly to the main memory. If none of the non-originating snooping masters has the requested data marked as updated, then the requested data is read from main memory.

Find Patent Forward Citations

Dieffenderfer, James. (2008). Selective snooping by snoop masters to locate updated data (U.S. Patent No. 7395380). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/7395380

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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