Accelerating large-scale simulation of seismic wave propagation by multi-GPUs and three-dimensional domain decomposition

Taro Okamoto, Hiroshi Takenaka, Takeshi Nakamura, Takayuki Aoki

研究成果

10 被引用数 (Scopus)

抄録

We adopted the GPU (graphics processing unit) to accelerate the large-scale finite-difference simulation of seismic wave propagation. We describe the main part of our implementation: the memory optimization, the three-dimensional domain decomposition, and overlapping communication and computation. With our GPU program, we achieved a very high single-precision performance of about 61 TFlops by using 1,200 GPUs and 1.5 TB of total memory, and a scalability nearly proportional to the number of GPUs on TSUBAME–2.0, the recently installed GPU supercomputer in Tokyo Institute of Technology, Japan. In a realistic application by using 400 GPUs, only a wall clock time of 2,068 s (including the times for the overhead of snapshot output) was required for a complex structure model with more than 13 billion unit cells and 20,000 time steps. We therefore conclude that GPU computing for large-scale simulation of seismic wave propagation is a promising approach.

本文言語English
ホスト出版物のタイトルLecture Notes in Earth System Sciences
出版社Springer International Publishing
ページ375-389
ページ数15
9783642164040
DOI
出版ステータスPublished - 2013
外部発表はい

出版物シリーズ

名前Lecture Notes in Earth System Sciences
番号9783642164040
0
ISSN(印刷版)2193-8571
ISSN(電子版)2193-858X

ASJC Scopus subject areas

  • 地球科学におけるコンピュータ
  • 地球惑星科学一般

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