scholarly journals A Study of the Floating-Point Tuning Behaviour on the N-body Problem

2021 ◽  
pp. 176-190 ◽  
Author(s):  
Dorra Ben Khalifa ◽  
Matthieu Martel
Keyword(s):  
Body Problem ◽  
Floating Point ◽  
N Body Problem

scholarly journals 2HOT: An Improved Parallel Hashed Oct-Tree N-Body Algorithm for Cosmological Simulation

2014 ◽  
Vol 22 (2) ◽  
pp. 109-124
Author(s):  
Michael S. Warren
Keyword(s):  
Computational Efficiency ◽  
Body Problem ◽  
Computational Approach ◽  
Floating Point ◽  
Scientific Application ◽  
The Past ◽  
N Body Problem ◽  
The Standard Model ◽  
Body Method ◽  
Planck Satellite

We report on improvements made over the past two decades to our adaptive treecode N-body method (HOT). A mathematical and computational approach to the cosmological N-body problem is described, with performance and scalability measured up to 256k (218) processors. We present error analysis and scientific application results from a series of more than ten 69 billion (40963) particle cosmological simulations, accounting for 4×1020floating point operations. These results include the first simulations using the new constraints on the standard model of cosmology from the Planck satellite. Our simulations set a new standard for accuracy and scientific throughput, while meeting or exceeding the computational efficiency of the latest generation of hybrid TreePM N-body methods.

scholarly journals On frequency estimations in phase fitted variational integrators for the general N-body problem

PAMM ◽  
2013 ◽  
Vol 13 (1) ◽  
pp. 33-34
Author(s):  
Odysseas Kosmas ◽  
Sigrid Leyendecker
Keyword(s):  
Body Problem ◽  
Variational Integrators ◽  
N Body Problem
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