HELP! * YELLOW=global GREY=local Global HTML version of Foils prepared July 6 1996

Foil 27 BBH: Computational Challenge

From HPCC Current Status: Applications, Industry , Grand and National Challenges Trip to China -- July 12-28,96. by Geoffrey Fox * See also color IMAGE
Secs 48
Problem size: Analysis with Uniform Grid
  • Requested spatial resolution: 50 mesh points per black hole (radius of event horizon, R)
  • To extract gravitational waves a space region of ~100 R is necessary
  • Number of mesh points: (50 x100)3 => ~ 1011
  • Time evolution: 50,000 steps (corresponds to distance ~1000R with dt=dx)
  • Total number of events: ~1016
  • Floating point operations per event: ~104
  • Total FLOP count: 1020 => 30 years of a Teraflop machine!
Solution: Adaptive Mesh Refinement
  • one week of a Teraflop machine
Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu

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