Method to improve tolerance of non-homogeneous power outages

Details Method to improve tolerance of non-homogeneous power outages Method to improve tolerance of non-homogeneous power outages

1995-06-07

1997-11-11

Beausoliel, Jr., Robert W.

3951822, 39518209, G06F 1100

Patent

active

056873085

ABSTRACT:
Multiple processors are connected to form a multiprocessor system having inter-processor communicating capability. Each processor maintains a configuration option register indicating the resources necessary to operate the multiprocessor system. In the event of a power-fail signal, indicating that possible power loss is imminent, a processor will proceed through a shut-down procedure to save the present operating state so that when power is re-applied the processor can continue from the operating state it left when power was lost. Those processors not receiving a power-fail signal will attempt to reconfigure the multiprocessor system, waiting a reasonable amount of time for the processor receiving the power-fail signal to continue operations. If the processor has not recovered from the power-fail signal after a reasonable amount of time, the other processors check the configuration option register to determine whether that processor is necessary for operation of the multiprocessor system. If it is, then the processors wait for the processor according to a formula specified in said reconfiguration option register. Otherwise, the processors exclude the processor from the system and continue operation without the excluded processors.

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