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Better branch prediction through prophet/critic hybrids
Falcón Samper, Ayose Jesús; Stark, Jared; Ramírez Bellido, Alejandro; Lai, Konrad; Valero Cortés, Mateo
Universitat Politècnica de Catalunya. Departament d'Arquitectura de Computadors; Universitat Politècnica de Catalunya. CAP - Grup de Computació d'Altes Prestacions
The prophet/critic hybrid conditional branch predictor has two component predictors. The prophet uses a branch's history to predict its direction. We call this prediction and the ones for branches following it the branch future. The critic uses the branch's history and future to critique the prophet's prediction. The hybrid combines the prophet's prediction with the critique, either agrees or disagree, forming the branch's overall prediction. Results shows these hybrids can reduce mispredicts by 39 percent and improve processor performance by 7.8 percent.
Peer Reviewed
Àrees temàtiques de la UPC::Informàtica::Arquitectura de computadors
Parallel processing (Electronic computers)
Microprocessors -- Design and construction
Storage management
Parallel architectures
Processament en paral·lel (Ordinadors)
Microprocessadors -- Disseny i construcció
info:eu-repo/semantics/publishedVersion
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