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High-performance fault-tolerant VLSI systems using micro rollback

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2 Author(s)
Tamir, Y. ; Dept. of Comput. Sci., California Univ., Los Angeles, CA, USA ; Tremblay, M.

A technique called micro rollback, which allows most of the performance penalty for concurrent error detection to be eliminated, is presented. Detection is performed in parallel with the transmission of information between modules, thus removing the delay for detection from the critical path. Erroneous information may thus reach its destination module several clock cycles before an error indication. Operations performed on this erroneous information are undone using a hardware mechanism for fast rollback of a few cycles. The implementation of a VLSI processor capable of micro rollback is discussed, as well as several critical issues related to its use in a complete system

Published in:

Computers, IEEE Transactions on  (Volume:39 ,  Issue: 4 )

Date of Publication:

Apr 1990

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