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. 31, 2005
Filed:
Mar. 25, 2002
Fred Gruner, Palo Alto, CA (US);
David Hass, Santa Clara, CA (US);
Robert Hathaway, Santa Clara, CA (US);
Ramesh Panwar, Pleasanton, CA (US);
Ricardo Ramirez, Sunnyvale, CA (US);
Nazar Zaidi, San Jose, CA (US);
Fred Gruner, Palo Alto, CA (US);
David Hass, Santa Clara, CA (US);
Robert Hathaway, Santa Clara, CA (US);
Ramesh Panwar, Pleasanton, CA (US);
Ricardo Ramirez, Sunnyvale, CA (US);
Nazar Zaidi, San Jose, CA (US);
Juniper Networks, Inc., Sunnyvale, CA (US);
Abstract
A system includes a plurality of processing clusters and a snoop controller. A first processing cluster in the plurality of processing clusters includes a first tier cache memory coupled to a second tier cache memory. The system employs a store-create operation to obtain sole ownership of a full cache line memory location for the first processing cluster, without retrieving the memory location from other processing clusters. The system issues the store-create operation for the memory location to the first tier cache. The first tier cache forwards a memory request including the store-create operation command to the second tier cache. The second tier cache determines whether the second tier cache has sole ownership of the memory location. If the second tier cache does not have sole ownership of the memory location, ownership of the memory location is relinquished by the other processing clusters with any ownership of the memory location.