Paper Info
Title
The universe at extreme scale: multi-petaflop sky simulation on the BG/Q
Abstract
Remarkable observational advances have established a compelling cross-validated model of the Universe. Yet, two key pillars of this model -- dark matter and dark energy -- remain mysterious. Next-generation sky surveys will map billions of galaxies to explore the physics of the 'Dark Universe'. Science requirements for these surveys demand simulations at extreme scales; these will be delivered by the HACC (Hybrid/Hardware Accelerated Cosmology Code) framework. HACC's novel algorithmic structure allows tuning across diverse architectures, including accelerated and multi-core systems. On the IBM BG/Q, HACC attains unprecedented scalable performance -- currently 6.23 PFlops at 62% of peak and 92% parallel efficiency on 786,432 cores (48 racks) -- at extreme problem sizes with up to almost two trillion particles, larger than any cosmological simulation yet performed. HACC simulations at these scales will for the first time enable tracking individual galaxies over the entire volume of a cosmological survey.
Year
DOI
Venue
2012
10.1109/SC.2012.106
High Performance Computing, Networking, Storage and Analysis
Keywords
DocType
Volume
dark matter,compelling cross-validated model,hacc simulation,cosmological simulation,multi-petaflop sky simulation,dark universe,extreme scale,extreme problem size,cosmological survey,surveys demand simulation,dark energy,computer architecture,galaxies,cosmology
Journal
abs/1211.4864
ISSN
ISBN
Citations 
2167-4329
978-1-4673-0805-2
24
PageRank 
References 
Authors
1.48
2
12
Name
Order
Citations
PageRank
Salman Habib19815.24
Vitali Morozov21429.11
Hal Finkel311418.43
Adrian Pope4674.45
Katrin Heitmann514414.49
Kalyan Kumaran624717.32
Tom Peterka753149.78
Joe Insley8241.81
David Daniel9271.90
Patricia Fasel10595.18
Nicholas Frontiere11614.13
Zarija Lukić12241.48