Heterogeneous acceleration of volumetric JPEG 2000 using OpenCL-Reference-Cited by-同舟云学术

Heterogeneous acceleration of volumetric JPEG 2000 using OpenCL

Published:2016-05-10 Issue:3 Volume:31 Page:229-245
ISSN:1094-3420
Container-title:The International Journal of High Performance Computing Applications
language:en
Short-container-title:The International Journal of High Performance Computing Applications

Author:

Cornelis Jan G.¹²,Lemeire Jan¹³²,Bruylants Tim¹²,Schelkens Peter¹²

Affiliation:

1. Vrije Universiteit Brussel (VUB), Electronics and Informatics (ETRO) Dept., Belgium

2. iMinds, Multimedia Technologies Dept., Belgium

3. Vrije Universiteit Brussel (VUB), Dept. Of Industrial Sciences (INDI), Belgium

Abstract

This paper discusses an OpenCL version of a volumetric JPEG 2000 codec that runs on GPUs, multi-core processors or a combination of both. Since the performance critical part consists of a fine-grained (discrete wavelet transform) and coarse-grained algorithm (Tier-1), the best performance is obtained with a hybrid execution in which the discrete wavelet transform is executed on a GPU and Tier-1 on a multi-core. Using an Intel i7 multi-core in combination with a modest NVIDIA Quadro K620 GPU yields speedups greater than 10 compared with the original sequential code. The performance bottlenecks that arise on GPUs when parallelizing algorithms that are coarse-grained by nature are discussed and also the optimizations that are possible. A performance analysis reveals the inefficiencies and explains the deviations from the GPU peak performance.

Funder

iMinds

Publisher

SAGE Publications

Subject

Hardware and Architecture,Theoretical Computer Science,Software

Link

http://journals.sagepub.com/doi/pdf/10.1177/1094342016646438

Reference21 articles.

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