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Título:
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Reducing cache hierarchy energy consumption by predicting forwarding and disabling associative sets
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Autores:
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Carazo, Pablo ;
Apollini, Ruben ;
Castro Rodríguez, Fernando ;
Chaver Martínez, Daniel Ángel ;
Piñuel Moreno, Luis ;
Tirado Fernández, Francisco
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Tipo de documento:
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texto impreso
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Editorial:
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World Scientific Publ Co Pte Ltd, 2012-11
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Dimensiones:
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application/pdf
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Nota general:
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info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Informática
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Tipo = Artículo
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Resumen:
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The first level data cache in modern processors has become a major consumer of energy due to its increasing size and high frequency access rate. In order to reduce this high energy consumption, we propose in this paper a straightforward filtering technique based on a highly accurate forwarding predictor. Specifically, a simple structure predicts whether a load instruction will obtain its corresponding data via forwarding from the load-store structure - thus avoiding the data cache access - or if it will be provided by the data cache. This mechanism manages to reduce the data cache energy consumption by an average of 21.5% with a negligible performance penalty of less than 0.1%. Furthermore, in this paper we focus on the cache static energy consumption too by disabling a portion of sets of the L2 associative cache. Overall, when merging both proposals, the combined L1 and L2 total energy consumption is reduced by an average of 29.2% with a performance penalty of just 0.25%.
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En línea:
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https://eprints.ucm.es/id/eprint/28484/1/pi%C3%B1uel02preprint.pdf
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