Better branch prediction through prophet/critic hybrids
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 t...
| Autores: | , , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2005 |
| País: | España |
| Recursos: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/105757 |
| Acesso em linha: | https://hdl.handle.net/2117/105757 https://dx.doi.org/10.1109/MM.2005.5 |
| Access Level: | acceso abierto |
| Palavra-chave: | Parallel processing (Electronic computers) Microprocessors -- Design and construction Storage management Parallel architectures Processament en paral·lel (Ordinadors) Microprocessadors -- Disseny i construcció Àrees temàtiques de la UPC::Informàtica::Arquitectura de computadors |
| Resumo: | 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. |
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