Multiprocessor system

Details Multiprocessor system Multiprocessor system

1995-10-30

1998-10-27

Coleman, Eric

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

711117, G06F 1208

Patent

active

058290320

ABSTRACT:
As much tag information as corresponds to the number of blocks stored in main memories is stored in tag memories. The tag information indicates whether or not a processor belonging to a node other than the nodes containing tag memories has made an access request and the contents of a cache have been rewritten. Bus bridges perform cache coherency control, referring to the tag information. When the tag information indicates "Modified," the bus bridges stop the data read from the main memories and send the correct data to the requesting processor after a copy-back process of the modified block has been completed.

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