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Algebraic Multigrid (amg) is a linear solver, well known for its linear computational complexity and excellent parallelization scalability. As a result, amg is expected to be a solver of choice for emerging extreme scale systems capable of delivering hundred Pflops and beyond. While node level performance of amg is generally limited by memory bandwidth, achieving high bandwidth efficiency is challenging due to highly sparse irregular computation, such as triple sparse matrix products,doi:10.1145/2807591.2807603 dblp:conf/sc/ParkSYMD15 fatcat:oss46ojlhrdsno2hmbibeyfk3q