Composite Confidence Estimators for Enhanced Speculation Control Conference Paper

abstract

• This paper proposes a way to allow more effective use of speculation control techniques by combining multiple confidence estimators into a composite confidence estimator. This new class of confidence estimators provides improved performance and finer speculation control. This paper makes three contributions. First, we describe techniques for building efficient composite confidence estimators. Second, we present an improved statistical methodology for evaluating confidence estimators. Finally, we use a detailed microarchitectural simulator to evaluate the ability of our estimator to support an energy reduction technique called pipeline gating. Using previous confidence estimators, pipeline gating reduces the amount of extra work due to mis-speculated instructions by 22%, with a reduction in IPC of 5%. With the same impact on IPC, our confidence estimators reduce extra work by 31%. 2009 IEEE.

name of conference

• 2009 21st International Symposium on Computer Architecture and High Performance Computing

authors

• Jimenez, Daniel

published proceedings

• 2009 21st International Symposium on Computer Architecture and High Performance Computing

author list (cited authors)

• Jimnez, D. A.

citation count

• 2

complete list of authors

• Jiménez, Daniel A

publication date

• January 2009

publisher

• Institute of Electrical and Electronics Engineers (IEEE)  Publisher

published in

• Proceedings / Symposium on Computer Architecture and High Performance Computing. Symposium on Computer Architecture and High Performance Computing  Journal

Digital Object Identifier (DOI)

• 10.1109/sbac-pad.2009.17

International Standard Book Number (ISBN) 13

• 9780769538570

start page

• 161

end page

• 168

URL

• http://dx.doi.org/10.1109/sbac-pad.2009.17