A comprehensive analysis of indirect branch prediction
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: A comprehensive analysis of indirect branch prediction
Abstract : Abstract. Indirect branch prediction is a performance limiting factor for current computer systems, preventing superscalar processors from exploiting the available ILP. Indirect branches are responsible for 55.7% of mispredictions in our benchmark set, although they only stand for 15.5 % of dynamic branches. Moreover, a 10.8 % average IPC speedup is achievable by perfectly predicting all indirect branches. The Multi-Stage Cascaded Predictor (MSCP) is a mechanism proposed for improving indirect branch prediction. In this paper, we show that a MSCP can replace a BTB and accurately predict the target address of both indirect and non-indirect branches. We do a detailed analysis of MSCP behavior and evaluate it in a realistic setup, showing that a 5.7% average IPC speedup is achievable.
: Computer Science
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