Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ascl.soft02008m&link_type=abstract
Astrophysics Source Code Library, record ascl:1102.008
Astronomy and Astrophysics
Astrophysics
Scientific paper
We present a new parallel PM N-body code named PMFAST that is cost-effective and memory-efficient. PMFAST is based on a two-level mesh gravity solver where the gravitational forces are separated into long and short range components. The decomposition scheme minimizes communication costs and allows tolerance for slow networks. The code approaches optimality in several dimensions. The force computations are local and exploit highly optimized vendor FFT libraries. It features minimal memory overhead, with the particle positions and velocities being the main cost. The code features support for distributed and shared memory parallelization through the use of MPI and OpenMP, respectively. The current release version uses two grid levels on a slab decomposition, with periodic boundary conditions for cosmological applications. Open boundary conditions could be added with little computational overhead. We present timing information and results from a recent cosmological production run of the code using a 3712^3 mesh with 6.4 x 10^9 particles.
Merz Hugh
Pen U.-L.
Trac Hy
No associations
LandOfFree
PMFAST: Towards Optimal Parallel PM N-body Codes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with PMFAST: Towards Optimal Parallel PM N-body Codes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and PMFAST: Towards Optimal Parallel PM N-body Codes will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1117086