210 citations · 660 across the 10 of their papers we have counts for
10 papers
Resolving local and global kinematic signatures of satellite mergers with billion particle simulations
Jason A. S. Hunt, Ioana A. Stelea, Kathryn V. Johnston +3
In this work we present two new particle self-consistent simulations of the merger of a Sagittarius-like dwarf galaxy with a Milky Way-like disc galaxy. One model is a v…
Scalable Distributed DNN Training using TensorFlow and CUDA-Aware MPI: Characterization, Designs, and Performance Evaluation
Ammar Ahmad Awan, Jeroen Bedorf, Ching-Hsiang Chu +2
TensorFlow has been the most widely adopted Machine/Deep Learning framework. However, little exists in the literature that provides a thorough understanding of the capabilities whi…
The origin of interstellar asteroidal objects like 1I/2017 U1 'Oumuamua
Simon Portegies Zwart, Santiago Torres, Inti Pelupessy +2
We study the origin of the interstellar object 1I/2017 U1 'Oumuamua by juxtaposing estimates based on the observations with simulations. We speculate that objects like 'Oumuamua ar…
Sapporo2: A versatile direct -body library
Jeroen Bédorf, Evghenii Gaburov, Simon Portegies Zwart
Astrophysical direct -body methods have been one of the first production algorithms to be implemented using NVIDIA's CUDA architecture. Now, almost seven years later, the GPU is…
24.77 Pflops on a Gravitational Tree-Code to Simulate the Milky Way Galaxy with 18600 GPUs
Jeroen Bédorf, Evghenii Gaburov, Michiko S. Fujii +3
We have simulated, for the first time, the long term evolution of the Milky Way Galaxy using 51 billion particles on the Swiss Piz Daint supercomputer with our -body gravitation…
Computational Gravitational Dynamics with Modern Numerical Accelerators
Simon Portegies Zwart, Jeroen Bédorf
We review the recent optimizations of gravitational -body kernels for running them on graphics processing units (GPUs), on single hosts and massive parallel platforms. For each…
Bonsai: A GPU Tree-Code
Jeroen Bédorf, Evghenii Gaburov, Simon Portegies Zwart
We present a gravitational hierarchical N-body code that is designed to run efficiently on Graphics Processing Units (GPUs). All parts of the algorithm are executed on the GPU whic…
A sparse octree gravitational N-body code that runs entirely on the GPU processor
Jeroen Bédorf, Evghenii Gaburov, Simon Portegies Zwart
We present parallel algorithms for constructing and traversing sparse octrees on graphics processing units (GPUs). The algorithms are based on parallel-scan and sort methods. To te…
Gravitational tree-code on graphics processing units: implementation in CUDA
Evghenii Gaburov, Jeroen Bédorf, Simon Portegies Zwart
We present a new very fast tree-code which runs on massively parallel Graphical Processing Units (GPU) with NVIDIA CUDA architecture. The tree-construction and calculation of multi…
High Performance Direct Gravitational N-body Simulations on Graphics Processing Units -- II: An implementation in CUDA
Robert G. Belleman, Jeroen Bedorf, Simon Portegies Zwart
We present the results of gravitational direct -body simulations using the Graphics Processing Unit (GPU) on a commercial NVIDIA GeForce 8800GTX designed for gaming computers. T…