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New Techniques for Improving the Performance of the Lockstep Architecture for SEEs Mitigation in FPGA Embedded Processors

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5 Author(s)
Abate, F. ; Politec. di Torino, Torino, Italy ; Sterpone, L. ; Lisboa, C.A. ; Carro, L.
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The growing availability of embedded processors inside FPGAs provides unprecedented flexibility for system designers. The use of such devices for space or mission critical applications, however, is being delayed by the lack of effective low cost techniques to mitigate radiation induced errors. In this paper a non invasive approach for the implementation of fault tolerant systems based on COTS processors embedded in FPGAs, using lockstep in conjunction with checkpoint and rollback recovery, is presented. The proposed approach does not require modifications in the processor architecture or in the application software. The experimental validation of this approach through fault injection is described, the corresponding results are discussed, and the addition of a write history table as a means to reduce the performance overhead imposed by previous implementations is proposed and evaluated.

Published in:

Nuclear Science, IEEE Transactions on  (Volume:56 ,  Issue: 4 )

Date of Publication:

Aug. 2009

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