LOCAL foilset Master Foilset for Parallelization of Black Hole Codes using HPF and DAGH

Given by Scott Klasky, Tom Haupt, Geoffrey C. Fox at CRPC Annual Meeting Houston on 21 May 97. Foils prepared 19 May 97
Abstract * Foil Index for this file

We describe basic physics and computational features of Binary Black Collision Grand Challenge

We show a simple finite difference is complicated by Adaptive Mesh refinement Complex inner and outer boundary conditions Need for several algorithms for hyberbolic and elliptic parts of problem

High level systems DAGH and especially HPF1 cannot express full complexity of problem and MPI must fill in the missing parts

HPF2 might be able to express full problem but HPF1 misses many key capabilities

DAGH is more succesful than HPF1 but needs MPI for parts of problem

Postscript or FramemakerVersion

HPF Code for Linear Waves

Grand Challenge Alliance Home Page

NPAC Activity in Grand Challenge Alliance

Table of Contents for full HTML of Master Foilset for Parallelization of Black Hole Codes using HPF and DAGH

This table of Contents Abstract

Foil 1 Goals of the Alliance

Foil 2 Computational Infrastructure

Foil 3 Memory requirements

Foil 4 Memory requirements (contiued)

Foil 5 ADM Equations

Foil 6 ADM Equations (continued)

Foil 7 ADM Equations (continued)

Foil 8 Causual Differencing

Foil 9 Causual Differencing (continued)

Foil 10 Apparent Horizon boundary Conditions

Foil 11 Computational components/modules

Foil 12 HPF and HPF2

Foil 13 DAGH

Foil 14 DAGH (continued)

Foil 15 DAGH (continued)

Foil 16 DAGH (continued)

Foil 17 Conversion of an existing Fortran 90 implementation to DAGH

Foil 18 F90 to DAGH: communication

Foil 19 F90 to DAGH: Passing data

Foil 20 Automatic translation

Foil 21 IMPLEMENTATION

Foil 22 IMPLEMENTATION

Foil 23 IMPLEMENTATION

Foil 24 1. Linear waves

Foil 25 2. Finding the Apparent Horizon

Foil 26 3a. Black Holes (Inner Boundary Condition

Foil 27 Inner Boundary condition (continued)

Foil 28 Inner Boundary Conditions (continued)

Foil 29 Inner Boundary Conditions (continued)

Foil 30 Inner Boundary Conditions (continued)

Foil 31 Inner Boundary Condition. Variable stencil size

Foil 32 3b. Moving Inner Boundary (A Moving Hole)

Foil 33 Moving Hole (Continued)

Foil 34 Moving Hole (continued)

Foil 35 4. Linear wave problem with matching outer boundary condition for gravitational wave extraction.

Foil 36 Matching interior and exterior evolution

Foil 37 5. Support for (parallel) AMR

Northeast Parallel Architectures Center, Syracuse University, npac@npac.syr.edu