Electrical computers and digital processing systems: memory – Storage accessing and control – Hierarchical memories
Patent
1996-07-05
1998-06-30
Coleman, Eric
Electrical computers and digital processing systems: memory
Storage accessing and control
Hierarchical memories
711145, G06F 1314
Patent
active
057747318
ABSTRACT:
In order to reduce load at a resource managing node for exclusive control of a shared resource, each node has a group of lock state registers each corresponding to one of the nodes. Before one node issues a lock request to a resource managing node, the node checks the register group to see if the resource managing node is unlocked. With the target node found to be accessible, the access requesting node sends to a broadcast message exchange circuit a broadcast request message including a lock request regarding the resource managing node. The broadcast message exchange circuit receives such broadcast request messages from access requesting nodes, and changes them serially into broadcast messages for broadcast to all nodes. Of these broadcast messages, the first message received by each node is processed by its lock control circuit so that the lock request in that message is allowed to lock the resource managing node. The lock control circuit writes the number of the access requesting node into the register corresponding to the resource managing node. The access requesting node checks the register contents to see if the lock request it issued has been successfully accepted.
REFERENCES:
patent: 5063503 (1991-11-01), Jordan
patent: 5230070 (1993-07-01), Liu
patent: 5696959 (1997-12-01), Guttag
Nikkei Electronics, No. 630, Feb. 27, 1995 pp. 101-114 by Masai, et al.
Study Report of the Information Processing Society of Japan, vol. 89, No. 60, Jul. 1989 pp. 17-24 by Nakagawa, et al.
Asaie Machiko
Higuchi Tatsuo
Inagami Yasuhiro
Kitai Katsuyoshi
Takeuchi Shigeo
Coleman Eric
Hitachi , Ltd.
Hitachi ULSI Engineering Co., Ltd.
LandOfFree
Exclusive control method with each node controlling issue of an does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Exclusive control method with each node controlling issue of an , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Exclusive control method with each node controlling issue of an will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1870909