First-order analysis of power overheads of redundant multi-threading

Redundant multi-threading (RMT) has been proposed as an architectural approach that efficiently detects and recovers from soft errors. RMT can impose non-trivial overheads in terms of power consumption. In this paper, we characterize some of the major factors that influence the power consumed by RMT. We outline mechanisms that can reduce this power and derive simple analytical estimates to identify the most promising approach.