Hierarchical memory control system

Details Hierarchical memory control system Hierarchical memory control system

G - Physics

06

F

G06F 13/16 (2006.01) G06F 12/00 (2006.01) G06F 12/08 (2006.01)

Patent

CA 2047888

HIERARCHICAL MEMORY CONTROL SYSTEM ABSTRACT A hierarchical memory control system comprising N central processing units (1) each including a store-in type buffer storage unit (2); a main storage unit (3) commonly used by the N central processing units (1); a global buffer storage unit (5) of a store-in type connected between the central processing units (1) and the main storage unit (3), for storing a data block transferred from the main storage unit (3), each entry of the global buffer storage unit (5) being larger than each entry of the buffer storage unit (2), the data block in each entry of the global buffer storage unit (5) being divided into M divided blocks; a tag unit (7) for managing the entries of the global buffer storage unit (5), including tags respectively corresponding to the entries of the global buffer storage unit (53, each tag including managing data for managing the data block; and a buffer control unit (8) for controlling the managing data in the tag unit (7), the buffer control unit (8) controlling the tag unit (7) and the global buffer storage unit (5) in such a way that, when the data stored in the buffer storage unit (2) is modified, the modified data is reflected at the global buffer storage unit (5) in accordance with the managing data in the tag unit (7), and when the data stored in the global buffer storage unit (5) is modified, the modified data is reflected at the main storage unit (3) in accordance with the managing data in the tag unit (7).

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