Visualizing Network Traffic to Understand the Performance of Massively Parallel Simulations
AuthorsLandge, A. G.
Levine, J. A.
Isaacs, K. E.
Langer, S. H.
KAUST Grant NumberKUS-C1-016-04
MetadataShow full item record
AbstractThe performance of massively parallel applications is often heavily impacted by the cost of communication among compute nodes. However, determining how to best use the network is a formidable task, made challenging by the ever increasing size and complexity of modern supercomputers. This paper applies visualization techniques to aid parallel application developers in understanding the network activity by enabling a detailed exploration of the flow of packets through the hardware interconnect. In order to visualize this large and complex data, we employ two linked views of the hardware network. The first is a 2D view, that represents the network structure as one of several simplified planar projections. This view is designed to allow a user to easily identify trends and patterns in the network traffic. The second is a 3D view that augments the 2D view by preserving the physical network topology and providing a context that is familiar to the application developers. Using the massively parallel multi-physics code pF3D as a case study, we demonstrate that our tool provides valuable insight that we use to explain and optimize pF3D-s performance on an IBM Blue Gene/P system. © 1995-2012 IEEE.
CitationLandge AG, Levine JA, Bhatele A, Isaacs KE, Gamblin T, et al. (2012) Visualizing Network Traffic to Understand the Performance of Massively Parallel Simulations. IEEE Transactions on Visualization and Computer Graphics 18: 2467–2476. Available: http://dx.doi.org/10.1109/TVCG.2012.286.
SponsorsThis work is supported in part by NSF awards IIS-1045032, OCI-0904631, OCI-0906379 and CCF-0702817, and by a KAUST awardKUS-C1-016-04. This work was also performed under the auspicesof the U.S. Department of Energy by the University of Utah undercontracts DE-SC0001922, DE-AC52-07NA27344 and DE-FC02-06ER25781, and by Lawrence Livermore National Laboratory undercontract DE-AC52-07NA27344 (LLNL-CONF-543359).
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