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Reliability for general purpose processing on the GPU (GPGPU) is becoming a weak link in the construction of reliable supercomputer systems. Because hardware protection is expensive to develop, requires dedicated on-chip resources, and is not portable across different architectures, the efficiency of software solutions such as redundant multithreading (RMT) must be explored. This paper presents a real-world design and evaluation of automatic software RMT on GPU hardware. We first describe adoi:10.1145/2678373.2665686 fatcat:sp5qrkfdzzfhrg5pho3oo6wjne