Heterogeneous Streaming

TitleHeterogeneous Streaming
Publication TypeConference Paper
Year of Publication2016
AuthorsNewburn, C. J., G. Bansal, M. Wood, L. Crivelli, J. Planas, A. Duran, P. Souza, L. Borges, P. Luszczek, S. Tomov, J. Dongarra, H. Anzt, M. Gates, A. Haidar, Y. Jia, K. Kabir, I. Yamazaki, and J. Labarta
Conference NameThe Sixth International Workshop on Accelerators and Hybrid Exascale Systems (AsHES), IPDPS 2016
Date Published2016-05
Conference LocationChicago, IL
AbstractThis paper introduces a new heterogeneous streaming library called hetero Streams (hStreams). We show how a simple FIFO streaming model can be applied to heterogeneous systems that include manycore coprocessors and multicore CPUs. This model supports concurrency across nodes, among tasks within a node, and between data transfers and computation. We give examples for different approaches, show how the implementation can be layered, analyze overheads among layers, and apply those models to parallelize applications using simple, intuitive interfaces. We compare the features and versatility of hStreams, OpenMP, CUDA Streams1 and OmpSs. We show how the use of hStreams makes it easier for scientists to identify tasks and easily expose concurrency among them, and how it enables tuning experts and runtime systems to tailor execution for different heterogeneous targets. Practical application examples are taken from the field of numerical linear algebra, commercial structural simulation software, and a seismic processing application.
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