Branch and Data Herding Reducing Control and Memory Divergence for Error toler

IEEE TRANSACTIONS ON MULTIMEDIA, VOL. XX, NO. Y, MONTH XX, 2012. 1Branch and Data Herding: Reducing Control and Memory Divergence for Error-tolerant GPU ApplicationsJohn Sartori and Rakesh KumarAbstract—Control and memory divergence between threads within the same execution bundle, or warp, have been shown to cause significant performance bottlenecks for GPU applications. In this paper, we exploit the observation that many GPU applications exhibit error tolerance to propose branch anddata herdin