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Issue No.10 - October (1990 vol.39)
pp: 1298-1304
ABSTRACT
<p>A multiprocessing system is t/s-diagnosable if all faulty processors can be identified to within s processors, provided there are no more than t faulty processors. A characterization theorem of S. Karunanithi and A.D. Friedman (1979) for t/s-diagnosability in certain special cases of systems called designs is extended to the entire class of D/sub 1,t'/(n) designs. It is shown that for large t, s is approximately t/sup 2//4t'. Furthermore, the minimum number of processors needed to attain a given diagnosability is derived. A multiprocessor system is sequentially t-diagnosable if at least one faulty processor can be identified provided there are no more than t faulty processors. A theorem by F. Preparata, G. Metze, and R. Chien (1967), giving a sufficient condition for sequential t-diagnosability in the single-loop system (a special case of designs), is extended to the entire class of D/sub 1,t'/(n) designs. It is shown that, for large t, approximately t/sup 2//4t' nodes are needed for a D/sub 1,t'/(n) design to be sequentially t-diagnosable.</p>
INDEX TERMS
t/s-diagnosability; sequential t-diagnosability; designs; multiprocessing system; faulty processors; characterization theorem; diagnosability; sufficient condition; single-loop system; nodes; fault tolerant computing; multiprocessing systems.
CITATION
Joo-Kang Lee, "A Characterization of t/s-Diagnosability and Sequential t-Diagnosability in Designs", IEEE Transactions on Computers, vol.39, no. 10, pp. 1298-1304, October 1990, doi:10.1109/12.59861
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