PaCo: Probability-based path confidence prediction

Abstract

A path confidence estimate indicates the likelihood that the processor is currently fetching correct path instructions. Accurate path confidence prediction is critical for applications like pipeline gating and confidence-based SMT fetch prioritization. Previous work in this domain uses a threshold-and-count predictor, where the number of unresolved, low… (More)
DOI: 10.1109/HPCA.2008.4658627

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