Accurate statistical approaches for generating representative workload compositions

Lieven Eeckhout, Rashmi Sundareswarat, Joshua J. Yi, David J Lilja, Paul R Schrater

Research output: Chapter in Book/Report/Conference proceedingConference contribution

13 Scopus citations

Abstract

Composing a representative workload is a crucial step during the design process of a microprocessor. The workload should be composed in such a way that it is representative for the target domain of application and yet, the amount of redundancy in the workload should be minimized as much as possible in order not to overly increase the total simulation time. As a result, there is an important trade-off that needs to be made between workload representativeness and simulation accuracy versus simulation speed. Previous work used statistical data analysis techniques to identify representative benchmarks and corresponding inputs, also called a subset, from a large set of potential benchmarks and inputs. These methodologies measure a number of program characteristics on which Principal Components Analysis (PCA) is applied before identifying distinct program behaviors among the benchmarks using cluster analysis. In this paper we propose Independent Components Analysis (ICA) as a better alternative to PCA as it does not assume that the original data set has a Gaussian distribution, which allows ICA to better find the important axes in the workload space. Our experimental results using SPEC CPU2000 benchmarks show that ICA significantly outperforms PCA in that ICA achieves smaller benchmark subsets that are more accurate than those found by PCA.

Original languageEnglish (US)
Title of host publicationProceedings of the 2005 IEEE International Symposium on Workload Characterization, IISWC-2005
Pages56-66
Number of pages11
DOIs
StatePublished - 2005
Event2005 IEEE International Symposium on Workload Characterization, IISWC-2005 - Austin, TX, United States
Duration: Oct 6 2005Oct 8 2005

Publication series

NameProceedings of the 2005 IEEE International Symposium on Workload Characterization, IISWC-2005
Volume2005

Other

Other2005 IEEE International Symposium on Workload Characterization, IISWC-2005
Country/TerritoryUnited States
CityAustin, TX
Period10/6/0510/8/05

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