Research Article
Understanding Slowdown in Large-Scale Heterogeneous Systems
@INPROCEEDINGS{10.1007/978-3-031-31234-2_12, author={William Turchetta and Kristen Gardner}, title={Understanding Slowdown in Large-Scale Heterogeneous Systems}, proceedings={Performance Evaluation Methodologies and Tools. 15th EAI International Conference, VALUETOOLS 2022, Virtual Event, November 2022, Proceedings}, proceedings_a={VALUETOOLS}, year={2023}, month={5}, keywords={Dispatching Heterogeneity Slowdown}, doi={10.1007/978-3-031-31234-2_12} }- William Turchetta
Kristen Gardner
Year: 2023
Understanding Slowdown in Large-Scale Heterogeneous Systems
VALUETOOLS
Springer
DOI: 10.1007/978-3-031-31234-2_12
Abstract
Modern computer systems are both large-scale, consisting of hundreds or thousands of servers, and heterogeneous, meaning that not all servers have the same speed. In such systems, slowdown—the ratio of a job’s response time to its size—is an important performance metric that has not yet received significant attention. We propose a new definition of slowdown that is well-suited to large-scale, heterogeneous systems. We analyze mean slowdown and mean response time under the Probabilistic SITA family of dispatching policies, and use our analysis to present a numerical study of the tradeoff between these two performance metrics.
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