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  1. Proceedings of the second workshop on Scalable algorithms for large-scale systems (ScalA '11)
  2. Layout-aware scientific computing: a case study using MILC
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Layout-aware scientific computing: a case study using MILC

Content Provider ACM Digital Library
Author Sun, Xian-He Simone, James Kowalkowski, Jim Paterno, Marc He, Jun Holmgren, Don
Abstract Nowadays, high performance computers have more cores and nodes than ever before. Computation is spread out among them, leading to more communication. For this reason, communication can easily become the bottleneck of a system and limit its scalability. The layout of an application on a computer is the key factor to preserve communication locality and reduce its cost. In this paper, we propose a simple model to optimize the layout for scientific applications by minimizing inter-node communication cost. The model takes into account the latency and bandwidth of the network and associates them with the dominant layout variables of the application. We take MILC as an example and analyze its communication patterns. According to our experimental results, the model developed for MILC achieved a satisfactory accuracy for predicting the performance, leading to up to 31% performance improvement.
Starting Page 21
Ending Page 24
Page Count 4
File Format PDF
ISBN 9781450311809
DOI 10.1145/2133173.2133183
Language English
Publisher Association for Computing Machinery (ACM)
Publisher Date 2011-11-14
Publisher Place New York
Access Restriction Subscribed
Content Type Text
Resource Type Article
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