%0 Conference Paper
%A Iwainsky, Christian
%A Shudler, Sergei
%A Calotoiu, Alexandru
%A Strube, Alexandre
%A Knobloch, Michael
%A Bischof, Christian
%A Wolf, Felix
%T How Many Threads will be too Many? On the Scalability of OpenMP Implementations
%V 9233
%C Berlin, Heidelberg
%I Springer Berlin Heidelberg
%M FZJ-2016-00659
%@ 978-3-662-48095-3 (print)
%B Lecture Notes in Computer Science
%P 451 - 463
%D 2015
%< Euro-Par 2015: Parallel Processing / Träff, Jesper Larsson (Editor)
%X Exascale systems will exhibit much higher degrees of parallelism both in terms of the number of nodes and the number of cores per node. OpenMP is a widely used standard for exploiting parallelism on the level of individual nodes. Although successfully used on today’s systems, it is unclear how well OpenMP implementations will scale to much higher numbers of threads. In this work, we apply automated performance modeling to examine the scalability of OpenMP constructs across different compilers and platforms. We ran tests on Intel Xeon multi-board, Intel Xeon Phi, and Blue Gene with compilers from GNU, IBM, Intel, and PGI. The resulting models reveal a number of scalability issues in implementations of OpenMP constructs and show unexpected differences between compilers.
%B 21st International Conference on Parallel and Distributed Computing
%C 24 Aug 2015 - 28 Aug 2015, Vienna (Austria)
Y2 24 Aug 2015 - 28 Aug 2015
M2 Vienna, Austria
%F PUB:(DE-HGF)8
%9 Contribution to a conference proceedings
%U <Go to ISI:>//WOS:000363786800035
%R 10.1007/978-3-662-48096-0_35
%U https://juser.fz-juelich.de/record/280948