Linear Branch Entropy: Characterizing and Optimizing Branch Behavior in a Micro-Architecture Independent Way
MAR 17, 2017 18:18 PM
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Linear Branch Entropy: Characterizing and Optimizing Branch Behavior in a Micro-Architecture Independent Way

Linear Branch Entropy: Characterizing and Optimizing Branch Behavior in a Micro-Architecture Independent Way

Sander De Pestel, Department of Electronics and Information Systems, Ghent University, Ghent, Belgium
Stijn Eyerman, Intel Belgium, Kontich, Belgium
Lieven Eeckhout, Department of Electronics and Information Systems, Ghent University, Ghent, Belgium

In this paper, we propose linear branch entropy, a new metric for characterizing branch behavior. Linear branch entropy is independent of the configuration of a specific branch predictor, but is highly correlated with the branch misprediction rate of any predictor.

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