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:
Jun. 11, 2013
Filed:
Dec. 09, 2008
Go Sugizaki, Kawasaki, JP;
Aiichiro Inoue, Kawasaki, JP;
Naozumi Aoki, Kawasaki, JP;
Tsuyoshi Motokurumada, Kawasaki, JP;
Go Sugizaki, Kawasaki, JP;
Aiichiro Inoue, Kawasaki, JP;
Naozumi Aoki, Kawasaki, JP;
Tsuyoshi Motokurumada, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
An information processing apparatus, a memory control method, and a memory control device are disclosed, the information processing apparatus including nodes each having a main memory, a processor including a cache memory, and a system controller. The system controller of at least one of the nodes includes a holding unit that holds address information corresponding to primary data stored in the main memory of its local node, and not cached in any of the cache memories of other nodes. The system controller of the at least one node may include local and global snoop control units, as well as a virtual tag expansion (VTAGx) unit, to maintain cache coherency, and under certain conditions, a snoop operation may be skipped or omitted.