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Cloverleaf : preparing hydrodynamics codes for exascale
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Mallinson, Andrew C., Beckingsale, David A., Gaudin, W. P., Herdman, J. A., Levesque, J. M. and Jarvis, Stephen A. (2013) Cloverleaf : preparing hydrodynamics codes for exascale. In: A New Vintage of Computing : CUG2013, Napa, CA, 6 - 9 May 2013. Published in: A New Vintage of Computing : Preliminary Proceedings
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Official URL: https://cug.org/proceedings/cug2013_proceedings/by...
Abstract
In this work we directly evaluate five candidate programming models for future exascale applications (MPI, MPI+OpenMP, MPI+OpenACC, MPI+CUDA and CAF) using a recently developed Lagrangian-Eulerian explicit hydrodynamics mini-application. The aim of this work is to better inform the exacsale planning at large HPC centres such as AWE. Such organisations invest significant resources maintaining and updating existing scientific codebases, many of which were not designed to run at the scale required to reach exascale levels of computation on future system architectures. We present our results and experiences of scaling these different approaches to high node counts on existing large-scale Cray systems (Titan and HECToR). We also examine the effect that improving the mapping between process layout and the underlying machine interconnect topology can have on performance and scalability, as well as highlighting several communication-focused optimisations.
| Item Type: | Conference Item (Paper) | ||||
|---|---|---|---|---|---|
| Divisions: | Faculty of Science > Computer Science | ||||
| Journal or Publication Title: | A New Vintage of Computing : Preliminary Proceedings | ||||
| Publisher: | Cray User Group, Inc. | ||||
| Official Date: | 2013 | ||||
| Dates: |
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| Status: | Peer Reviewed | ||||
| Publication Status: | Published | ||||
| Access rights to Published version: | Restricted or Subscription Access | ||||
| Conference Paper Type: | Paper | ||||
| Title of Event: | A New Vintage of Computing : CUG2013 | ||||
| Type of Event: | Conference | ||||
| Location of Event: | Napa, CA | ||||
| Date(s) of Event: | 6 - 9 May 2013 |
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