Method for error recovery spinlock in asymmetrically accessed mu

Details Method for error recovery spinlock in asymmetrically accessed mu Method for error recovery spinlock in asymmetrically accessed mu

1997-03-14

1999-07-13

Ellis, Richard L.

Electrical computers and digital processing systems: memory

Storage accessing and control

Shared memory area

39580028, 39518501, G06F 1216

Patent

active

059241225

ABSTRACT:
An error recovery method and apparatus has specific application in a networking arrangement having a plurality of individual processing nodes which communicate via shared memory space. For error recovery, the system uses a reliable error count, the value of which is maintained by all of the nodes. When an error is detected, the error count is incremented, and all of the active nodes are provided with the new error count. Any of the nodes can run the error recovery method, and may gain exclusive access to the network by acquiring an error recovery spinlock. Once the spinlock is acquired, the node holding the spinlock increments the error count and confirms that all active nodes have received the new error count. The spinlock is thereafter released.

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Wang et al., Priority Inheritance Spin Locks for Multiprocessor Real-Time Systems, Parallel Architectures, Algorithms, and Networks, 1996 Symposium, IEEE, Jun. 12-14, 1996.
Anderson, Thomas E., The Performance of Spin Lock Alternatives for Shared-Memory Multiprocessors, IEEE Transactions on Parallel and Distributed Systems, IEEE, vol. 1, No. 1, Jan. 1990.

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