XcalableMP PGAS Programming Language

XcalableMP is a directive-based parallel programming language based on Fortran and C, supporting a Partitioned Global Address Space (PGAS) model for distributed memory parallel systems. This open access book presents XcalableMP language from its programming model and basic concept to the experience and performance of applications described in XcalableMP.　 XcalableMP was taken as a parallel programming language project in the FLAGSHIP 2020 project, which was to develop the Japanese flagship supercomputer, Fugaku, for improving the productivity of parallel programing. XcalableMP is now available on Fugaku and its performance is enhanced by the Fugaku interconnect, Tofu-D. The global-view programming model of XcalableMP, inherited from High-Performance Fortran (HPF), provides an easy and useful solution to parallelize data-parallel programs with directives for distributed global array and work distribution and shadow communication. The local-view programming adopts coarray notation from Coarray Fortran (CAF) to describe explicit communication in a PGAS model. The language specification was designed and proposed by the XcalableMP Specification Working Group organized in the PC Consortium, Japan. The Omni XcalableMP compiler is a production-level reference implementation of XcalableMP compiler for C and Fortran 2008, developed by RIKEN CCS and the University of Tsukuba. The performance of the XcalableMP program was used in the Fugaku as well as the K computer. A performance study showed that XcalableMP enables a scalable performance comparable to the message passing interface (MPI) version with a clean and easy-to-understand programming style requiring little effort

演算加速機構を持つ並列システム向けPGAS言語コンパイラの研究

筑波大学 (University of Tsukuba)201

筑波大学計算科学研究センター 平成26年度 年次報告書

1 平成26年度重点施策および改善目標の達成状況　……　22 自己評価と課題　……　103 各研究部門の報告　……　13I.素粒子物理研究部門　……　13Ⅱ.宇宙・原子核物理研究部門　……　40 Ⅱ-1.宇宙分野　……　40 Ⅱ-2.原子核物理分野　……　63Ⅲ.量子物性研究部門　……　78Ⅳ.生命科学研究部門　……　96 Ⅳ-1.生命機能情報分野　……　96 Ⅳ-2.分子進化分野　……　108Ⅴ.地球環境研究部門　……　123Ⅵ.高性能計算システム研究部門　……　133Ⅶ.計算情報学研究部　……　166 Ⅶ-1.データ基盤分野　……　166 Ⅶ-2.計算メディア分野　……　18

最先端高性能計算システムにおける第一原理電子動力学シミュレーションのコデザイン

筑波大学 (University of Tsukuba)201