@inproceedings{0c87e4b978e942dcae0818add48a65db,
title = "Evaluating the impacts of code-level performance tunings on power efficiency",
abstract = "As the power consumption of HPC systems will be a primary constraint for exascale computing, a main objective in HPC communities is recently becoming to maximize power efficiency (i.e., performance per watt) rather than performance. Although programmers have spent a considerable effort to improve performance by tuning HPC programs at a code level, tunings for improving power efficiency is now required. In this work, we select two representative HPC programs (Graph500 and SDPARA) and evaluate how traditional code-level performance tunings applied to these programs affect power efficiency. We also investigate the impacts of the tunings on power efficiency at various operating frequencies of CPUs and/or GPUs. The results show that the tunings significantly improve power efficiency, and different types of tunings exhibit different trends in power efficiency by varying CPU frequency. Finally, the scalability and power efficiency of state-of-the-art Graph500 implementations are explored on both a single-node platform and a 960-node supercomputer. With their high scalability, they achieve 27.43 MTEPS/Watt with 129.76 GTEPS on the single-node system and 4.39 MTEPS/Watt with 1,085.24 GTEPS on the supercomputer.",
author = "Satoshi Imamura and Keitaro Oka and Yuichiro Yasui and Yuichi Inadomi and Katsuki Fujisawa and Toshio Endo and Koji Ueno and Keiichiro Fukazawa and Nozomi Hata and Yuta Kakibuka and Koji Inoue and Takatsugu Ono",
year = "2016",
month = jan,
day = "1",
doi = "10.1109/BigData.2016.7840624",
language = "English",
series = "Proceedings - 2016 IEEE International Conference on Big Data, Big Data 2016",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "362--369",
editor = "Ronay Ak and George Karypis and Yinglong Xia and Hu, {Xiaohua Tony} and Yu, {Philip S.} and James Joshi and Lyle Ungar and Ling Liu and Aki-Hiro Sato and Toyotaro Suzumura and Sudarsan Rachuri and Rama Govindaraju and Weijia Xu",
booktitle = "Proceedings - 2016 IEEE International Conference on Big Data, Big Data 2016",
address = "United States",
note = "4th IEEE International Conference on Big Data, Big Data 2016 ; Conference date: 05-12-2016 Through 08-12-2016",
}