Astronomy and Astrophysics – Astrophysics
Scientific paper
2001-12-04
J.Comput.Phys. 185 (2003) 484-511
Astronomy and Astrophysics
Astrophysics
33 pages, 10 postscript figures
Scientific paper
10.1016/S0021-9991(02)00067-0
A systolic algorithm rhythmically computes and passes data through a network of processors. We investigate the performance of systolic algorithms for implementing the gravitational N-body problem on distributed-memory computers. Systolic algorithms minimize memory requirements by distributing the particles between processors. We show that the performance of systolic routines can be greatly enhanced by the use of non-blocking communication, which allows particle coordinates to be communicated at the same time that force calculations are being carried out. Hyper-systolic algorithms reduce the communication complexity at the expense of increased memory demands. As an example of an application requiring large N, we use the systolic algorithm to carry out direct-summation simulations using 10^6 particles of the Brownian motion of the supermassive black hole at the center of the Milky Way galaxy. We predict a 3D random velocity of 0.4 km/s for the black hole.
Dorband Ernst Nils
Hemsendorf Marc
Merritt David
No associations
LandOfFree
Systolic and Hyper-Systolic Algorithms for the Gravitational N-Body Problem, with an Application to Brownian Motion 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 Systolic and Hyper-Systolic Algorithms for the Gravitational N-Body Problem, with an Application to Brownian Motion, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systolic and Hyper-Systolic Algorithms for the Gravitational N-Body Problem, with an Application to Brownian Motion will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-173956