SCHEDULE: NOV 16-22, 2013

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2HOT: An Improved Parallel Hashed Oct-Tree N-body Algorithm for Cosmological Simulation

SESSION: Physical Frontiers

EVENT TYPE: Papers, Awards, Best Paper Finalists

TIME: 4:30PM - 5:00PM

SESSION CHAIR: Richard Vuduc

AUTHOR(S):Michael S. Warren

ROOM:201/203

ABSTRACT:
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 (2^18) processors. We present error analysis and scientific application results from a series of more than ten 69 billion (4096^3) particle cosmological simulations, accounting for 4 x 10^20 floating 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.

Chair/Author Details:

Richard Vuduc (Chair) - Georgia Institute of Technology

Michael S. Warren - Los Alamos National Laboratory

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The full paper can be found in the ACM Digital Library