Contribution to a conference proceedings/Contribution to a book

FZJ-2017-00520

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Packet-Oriented Streamline Tracing on Modern SIMD Architectures

Hentschel, B. ; Göbbert, J. H. ; Klemm, M. ; Springer, P. ; Schnorr, A. ; Kuhlen, T.

2015
The Eurographics Association

This record in other databases:  

Please use a persistent id in citations: doi:10.2312/pgv.20151154

Abstract: The advection of integral lines is an important computational kernel in vector field visualization. We investigate how this kernel can profit from vector (SIMD) extensions in modern CPUs. As a baseline, we formulate a streamline tracing algorithm that facilitates auto-vectorization by an optimizing compiler. We analyze this algorithm and propose two different optimizations. Our results show that particle tracing does not per se benefit from SIMD computation. Based on a careful analysis of the auto-vectorized code, we propose an optimized data access routine and a re-packing scheme which increases average SIMD efficiency. We evaluate our approach on three different, turbulent flow fields. Our optimized approaches increase integration performance up to 5:6 over our baseline measurement. We conclude with a discussion of current limitations and aspects for future work.

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Contributing Institute(s):

1. Jülich Supercomputing Center (JSC)
2. JARA - HPC (JARA-HPC)

Research Program(s):

1. 511 - Computational Science and Mathematical Methods (POF3-511) (POF3-511)

Appears in the scientific report 2016

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