Kavli Affiliate: Katrin Heitmann
| First 5 Authors: Nicholas Frontiere, Nicholas Frontiere, , ,
| Summary:
Resolving the most fundamental questions in cosmology requires simulations
that match the scale, fidelity, and physical complexity demanded by
next-generation sky surveys. To achieve the realism needed for this critical
scientific partnership, detailed gas dynamics, along with a host of
astrophysical effects, must be treated self-consistently with gravity for
end-to-end modeling of structure formation. As an important step on this
roadmap, exascale computing enables simulations that span survey-scale volumes
while incorporating key subgrid processes that shape complex cosmic structures.
We present results from CRK-HACC, a cosmological hydrodynamics code built for
the extreme scalability requirements set by modern cosmological surveys. Using
separation-of-scale techniques, GPU-resident tree solvers, in situ analysis
pipelines, and multi-tiered I/O, CRK-HACC executed Frontier-E: a four trillion
particle full-sky simulation, over an order of magnitude larger than previous
efforts. The run achieved 513.1 PFLOPs peak performance, processing 46.6
billion particles per second and writing more than 100 PB of data in just over
one week of runtime.
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