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image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao https://doi.org/10.1...arrow_drop_down
image/svg+xml Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao Closed Access logo, derived from PLoS Open Access logo. This version with transparent background. http://commons.wikimedia.org/wiki/File:Closed_Access_logo_transparent.svg Jakob Voss, based on art designer at PLoS, modified by Wikipedia users Nina and Beao
https://doi.org/10.1145/782817...
Article . 2003 . Peer-reviewed
Data sources: Crossref
DBLP
Conference object . 2025
Data sources: DBLP
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Recycling waste

exploiting wrong-path execution to improve branch prediction
Authors: Haitham Akkary; Srikanth T. Srinivasan; Konrad Lai;

Recycling waste

Abstract

Despite continuous improvement in branch prediction algorithms, branch misprediction remains a major limitation on microprocessor performance. As pipelines are widened or stretched deeper, branch prediction will become even more crucial. This paper taps into a currently wasted resource, wrong-path execution, to help improve branch prediction. Due to control independence, often the outcomes of branches that are executed along the wrong-path match the outcomes on the correct-path. Current branch prediction methods rely on correlation between branches on the correct path, therefore leaving potentially useful wrong-path branch information unexploited. We present in this paper a new, very simple, and very effective method that extends branch prediction to allow the recycling of wrong-path branch outcomes at the fetch stage. Simulations of deeply pipelined processors using a selected set of SpecInt 2000 and other benchmarks, with more than 5 branch mispredictions per thousand micro-operations, show that branch misprediction rate can be reduced by up to 30%. Depending on the pipeline depth, the corresponding average performance improvement varies from 5% to 20%.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
7
Average
Average
Average
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