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:
Sep. 07, 2004
Filed:
Jun. 02, 2000
Tsuyoshi Tanaka, Kokubunji, JP;
Hideya Akashi, Kunitachi, JP;
Yuji Tsushima, Kokubunji, JP;
Keitaro Uehara, Kokubunji, JP;
Naoki Hamanaka, Tokyo, JP;
Toru Shonai, Hachioji, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
In a multiprocessor system of a main memory shared type having a plurality of nodes connected each other through signal lines; each of the plurality of nodes includes CPUs having caches therein, a main memory, and a node controller for performing communication control between the CPUs, main memory and ones of the nodes other than its own node. The node controller has a communication controller for controlling communication interface between the plurality of nodes, a crossbar for determining a processing sequence of memory access issued from at least one of the plurality of nodes to be directed to the main memories of the plurality of nodes, and crossbar controller for making valid or invalid the crossbar.