Latency-Aware Selection of Check Variables for Soft-Error Tolerant Datapath Synthesis

Junghoon OH  Mineo KANEKO  

Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E100-A   No.7   pp.1506-1510
Publication Date: 2017/07/01
Online ISSN: 1745-1337
Type of Manuscript: Special Section LETTER (Special Section on Design Methodologies for System on a Chip)
Category: 
Keyword: 
check variable selection,  cone-partitioning,  speculative resource sharing,  soft-error tolerant datapath,  triple algorithm redundancy,  

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Summary: 
This letter proposes a heuristic algorithm to select check variables, which are points of comparison for error detection, for soft-error tolerant datapaths. Our soft-error tolerance scheme is based on check-and-retry computation and an efficient resource management named speculative resource sharing (SRS). Starting with the smallest set of check variables, the proposed algorithm repeats to add new check variable one by one incrementally and find the minimum latency solution among the series of generated solutions. During the process, each new check variable is selected so that the opportunity of SRS is enlarged. Experimental results show that improvements in latency are achieved compared with the choice of the smallest set of check variables.