Configuration of locally spared arrays in the presence of multiple fault types
The bulk of results for the performance of configuration architectures treat the case of failed processors, but neglect switches that are stuck open or closed. By contrast, the present work characterizes this multivariate problem in the presence of either lid or clustered faults. Suppose that the designer wishes to assure, with high probability, a fault free sigma x t array. If local sparing is used then, as we prove, the area of the,redundant array is 1) theta(st log st) in the presence of faulty elements or faulty elements and switches stuck open; 2) theta(st log(2) st) in the presence of faulty elements and switches stuck closed; 3) theta([st](2) log st) in the presence of faulty elements and switches that may be either stuck open or stuck closed. We also furnish bounds on maximum wirelength and an optimal configuration algorithm.
local sparing configuration architectures fault tolerance systolic arrays