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IEICE TRANSACTIONS on Information

Open Access
Fast Computation with Efficient Object Data Distribution for Large-Scale Hologram Generation on a Multi-GPU Cluster

Takanobu BABA, Shinpei WATANABE, Boaz JESSIE JACKIN, Kanemitsu OOTSU, Takeshi OHKAWA, Takashi YOKOTA, Yoshio HAYASAKI, Toyohiko YATAGAI

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Summary :

The 3D holographic display has long been expected as a future human interface as it does not require users to wear special devices. However, its heavy computation requirement prevents the realization of such displays. A recent study says that objects and holograms with several giga-pixels should be processed in real time for the realization of high resolution and wide view angle. To this problem, first, we have adapted a conventional FFT algorithm to a GPU cluster environment in order to avoid heavy inter-node communications. Then, we have applied several single-node and multi-node optimization and parallelization techniques. The single-node optimizations include a change of the way of object decomposition, reduction of data transfer between the CPU and GPU, kernel integration, stream processing, and utilization of multiple GPUs within a node. The multi-node optimizations include distribution methods of object data from host node to the other nodes. Experimental results show that intra-node optimizations attain 11.52 times speed-up from the original single node code. Further, multi-node optimizations using 8 nodes, 2 GPUs per node, attain an execution time of 4.28 sec for generating a 1.6 giga-pixel hologram from a 3.2 giga-pixel object. It means a 237.92 times speed-up of the sequential processing by CPU and 41.78 times speed-up of multi-threaded execution on multicore-CPU, using a conventional FFT-based algorithm.

Publication
IEICE TRANSACTIONS on Information Vol.E102-D No.7 pp.1310-1320
Publication Date
2019/07/01
Publicized
2019/03/29
Online ISSN
1745-1361
DOI
10.1587/transinf.2018EDP7346
Type of Manuscript
PAPER
Category
Human-computer Interaction

Authors

Takanobu BABA
  Utsunomiya University
Shinpei WATANABE
  Acs Co., Ltd.
Boaz JESSIE JACKIN
  National Institute of Information and Communications Technology
Kanemitsu OOTSU
  Utsunomiya University
Takeshi OHKAWA
  Utsunomiya University
Takashi YOKOTA
  Utsunomiya University
Yoshio HAYASAKI
  Utsunomiya University
Toyohiko YATAGAI
  Utsunomiya University

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