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OpenACC NBody Galaxy

brute force algorithm suitable for simulating and visualizing spiral galaxy evolution. accelerated with OpenACC directives targeting NVIDIA GP GPUs. originally started this project as a barneshut simulation: https://github.com/alexshi0000/Astrocom

Demo

  • particles: 112,640
  • realization time: ~ 29 minutes

Alt Text

  • particles: 33,693
  • realization time: ~ 9 minutes

Alt Text

Getting Started

clone this repository on to your machine

git clone https://github.com/alexshi0000/OpenACC-PGI-NBODY

Prerequisites

NVIDIA gpu. recommended: NVIDIA Tesla k20 or higher. update drivers

sudo apt-get purge nvidia* 
sudo add-apt-repository ppa:graphics-drivers
sudo apt-get update
sudo apt-get install nvidia-370 (or better)

shutdown and check for new driver using smi. install glut

nvidia-smi
sudo apt-get install freeglut3 freeglut3-dev

install PGI compiler

https://developer.nvidia.com/openacc-toolkit

how to install CUDA (version 6 and up)

http://developer.download.nvidia.com/compute/cuda/7.5/Prod/docs/sidebar/CUDA_Installation_Guide_Linux.pdf

Installation

using make

sudo apt install make

./../src/make pgi

or

sudo chmod +x ./../src/pgi_make.sh
./../src/pgi_make.sh

Run

on linux

./../bin/main

on windows

./../bin/main.exe