理化学研究所 計算科学研究センター

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第149回 第3部

第149回 第3部
日時: 2018年10月10日(水)、15:50 - 16:20
場所: R-CCS 6階講堂

・講演題目:High-performance implementation of the Jacobi based eigen- and singular value decomposition methods
・講演者:工藤周平 (大規模並列数値計算技術研究チーム 特別研究員)
※発表・スライド共に英語

講演要旨:

In this talk, we explain our progress in developing high-performance implementations of the Jacobi method. The Jacobi method is an old algorithm to compute eigen- and singular value decompositions. Although its large computational cost, it has advantages against the conventional method on recent supercomputers when it is used with the blocking and the parallelizing techniques which improve the arithmetic intensity and reduce the communication cost. Our optimized implementations of the Jacobi method show high strong scalability on recent supercomputers with more than ten thousand nodes and outperform the conventional method.