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Performance Characteristics of HYDRA - A Multi-physics Simulation Code from LLNL

机译：HYDRA的性能特征-LLNL的多物理场仿真代码

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摘要

HYDRA simulates a variety of experiments carried out at the National Ignition Facility and other high energy density physics facilities. It has packages to simulate radiation transfer, atomic physics, hydrodynamics, laser propagation, and a number of other physics effects. HYDRA has over one million lines of code, includes MPI and thread-level (OpenMP and pthreads) parallelism, has run on a variety of platforms for two decades, and is undergoing active development. In this paper, we demonstrate that HYDRA's thread-based load balancing approach is very effective. Hardware counters from IBM Blue Gene/Q runs show that none of HYDRA's packages are memory bandwidth limited, a few come close to the maximum integer instruction issue rate, and all are well below the maximum floating point issue rate.
机译：HYDRA模拟了在国家点火设施和其他高能量密度物理设施上进行的各种实验。它具有模拟辐射传输，原子物理学，流体力学，激光传播以及许多其他物理效应的软件包。 HYDRA拥有超过一百万行代码，其中包括MPI和线程级（OpenMP和pthreads）并行性，已经在各种平台上运行了二十年，并且正在积极开发中。在本文中，我们证明了HYDRA基于线程的负载平衡方法非常有效。 IBM Blue Gene / Q运行的硬件计数器显示，HYDRA的软件包都没有受内存带宽限制，有一些软件包接近最大整数指令发出率，并且都远低于最大浮点发出率。

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