Method and apparatus for seeding differences in lock-stepped...

Details Method and apparatus for seeding differences in lock-stepped... Method and apparatus for seeding differences in lock-stepped...

2006-02-21

2006-02-21

Beausoliel, Robert (Department: 2114)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S012000

Reexamination Certificate

active

07003691

ABSTRACT:
An apparatus, and a corresponding method, are used for seeding differences in lock stepped processors, the apparatus implemented on two or more processors operating in a lock step mode, wherein each of the two or more processors comprise a processor-specific resource operable to seed the differences, a processor logic to execute a code sequence, wherein an identical code sequence is executed by the processor logic of each of the two or more processors, and an output to provide a result of execution of the code sequence. The processor outputs, based on execution of the code sequence is provided to a lock step logic operable to read and compare the output of each of the two or more processors.

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