Efficient Parallel Computation of All-Pairs N-Body Acceleration by Do-loop Folding

Details Efficient Parallel Computation of All-Pairs N-Body Acceleration by Do-loop Folding Efficient Parallel Computation of All-Pairs N-Body Acceleration by Do-loop Folding

Jul 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aj....142...18f&link_type=abstract

The Astronomical Journal, Volume 142, Issue 1, article id. 18 (2011).

Astronomy and Astrophysics

Astronomy

Celestial Mechanics, Methods: Numerical

Scientific paper

The computational load inside a do loop is equalized by folding the loop appropriately if the amount of load is a linear function of the loop index. Using this idea, we develop an efficient parallel computation scheme of Newtonian all-pairs N-body acceleration vectors with help from OpenMP architecture. Using a consumer PC with a quad-core eight-thread processor, the new parallel scheme runs 4.2-4.9 times faster than a serial computation when the number of particles exceeds a few hundred.

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