Performance Comparison of Eulerian Kinetic Vlasov Code Between Xeon Phi KNL and Xeon Broadwell

  • Takayuki UmedaEmail author
  • Keiichiro Fukazawa
Conference paper
Part of the Communications in Computer and Information Science book series (CCIS, volume 946)


The present study deals with the kinetic Vlasov simulation code as a high-performance application, which solves the first-principle kinetic equations known as the Vlasov equation. A five-dimensional Vlasov code with two spatial dimension and three velocity dimensions is parallelized with the MPI-OpenMP hybrid parallelism. The performance of the parallel Vlasov code is measured on a single compute node with a Xeon Phi Knights Landing (KNL) processor and on a single compute node with two Xeon Broadwell processors. It is shown that the use of Multi-Channel Dynamic Random Access Memory (MCDRAM) as the “cache” mode gives higher performances than the “flat” mode when the size of a computing job is larger than the size of MCDRAM. On the other hand, the use of MCDRAM as the “flat” mode gives higher performances than the “cache” mode for small-size jobs, when the NUMA (Non-Uniform Memory Access) policy is controlled appropriately. It is also shown that there is not a substantial difference in the performance among the cluster modes. The performance of our Vlasov code is best with the “Quadrant” cluster mode and worst with the “SNC-4” cluster mode.


Performance measurement Xeon Phi processor Xeon processor Eulerian-grid-based method Hybrid parallelism 


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© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  1. 1.Institute for Space-Earth Environmental ResearchNagoya UniversityNagoyaJapan
  2. 2.Academic Center for Computing and Media StudiesKyoto UniversityKyotoJapan

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