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Nek5000 with OpenACC
Nek5000 with OpenACC
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- Gong, Jing (författare)
- KTH,SeRC - Swedish e-Science Research Centre,Parallelldatorcentrum, PDC
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- Markidis, Stefano (författare)
- KTH,High Performance Computing and Visualization (HPCViz),SeRC - Swedish e-Science Research Centre
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- Schliephake, Michael (författare)
- KTH,High Performance Computing and Visualization (HPCViz),SeRC - Swedish e-Science Research Centre
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- Laure, Erwin (författare)
- KTH,High Performance Computing and Visualization (HPCViz),SeRC - Swedish e-Science Research Centre
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- Henningson, Dan (författare)
- KTH,Stabilitet, Transition, Kontroll,SeRC - Swedish e-Science Research Centre
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- Schlatter, Philipp (författare)
- KTH,Stabilitet, Transition, Kontroll,SeRC - Swedish e-Science Research Centre
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Peplinski, Adam (författare)
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Hart, Alistair (författare)
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Doleschal, Jens (författare)
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Henty, David (författare)
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Fischer, Paul (författare)
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(creator_code:org_t)
- 2015-02-19
- 2015
- Engelska.
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Ingår i: Solving software challenges for exascale. - Cham : Springer International Publishing. - 9783319159751 - 9783319159768 ; , s. 57-68
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Nek5000 is a computational fluid dynamics code based on the spectral element method used for the simulation of incompressible flows. We follow up on an earlier study which ported the simplified version of Nek5000 to a GPU-accelerated system by presenting the hybrid CPU/GPU implementation of the full Nek5000 code using OpenACC. The matrix-matrix multiplication, the Nek5000 gather-scatter operator and a preconditioned Conjugate Gradient solver have implemented using OpenACC for multi-GPU systems. We report an speed-up of 1.3 on single node of a Cray XK6 when using OpenACC directives in Nek5000. On 512 nodes of the Titan supercomputer, the speed-up can be approached to 1.4. A performance analysis of the Nek5000 code using Score-P and Vampir performance monitoring tools shows that overlapping of GPU kernels with host-accelerator memory transfers would considerably increase the performance of the OpenACC version of Nek5000 code.
Ämnesord
- NATURVETENSKAP -- Data- och informationsvetenskap -- Datavetenskap (hsv//swe)
- NATURAL SCIENCES -- Computer and Information Sciences -- Computer Sciences (hsv//eng)
Nyckelord
- GPU programming
- Nek5000
- OpenACC
- Spectral element method
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- kon (ämneskategori)
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Gong, Jing
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Markidis, Stefan ...
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Schliephake, Mic ...
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Laure, Erwin
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Henningson, Dan
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Schlatter, Phili ...
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visa fler...
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Peplinski, Adam
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Hart, Alistair
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Doleschal, Jens
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Henty, David
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Fischer, Paul
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visa färre...
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