N-Body Cosmology

• Grand Challenge Cosmology Consortium

• TPM parallel N-body program
  • Tree-based direct algorithm for high-density regions

  • Particle-mesh algorithm for low-density regions

  • Guohong Xu (Princeton)

  • http://zeus.ncsa.uiuc.edu:8080/TPM_simulation.html

  • Message-passing (PVM, MPL)
    • Task (control) parallelism for tree calculation managed by master PE that computes global tree for a timestep

    • COW, IBM SP2 machines
      
      

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