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MPI HPF and DAGH for Parallelization of Black Hole Codes

Given by Scott Klasky, Tom Haupt, Geoffrey C. Fox at SIAM Workshop Minneapolis "Is Message Passing Obsolete" on 16 March 97. Foils prepared 18 March 97

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
MPI or more generally message passing is not obsolete but rather the only complete solution!
Higher level systems DAGH and especially HPF 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

This mixed presentation uses parts of the following base foilsets which can also be looked at on their own! 
BBH-DAGH-HPF-Mar97Master Master Foilset for MPI HPF and DAGH for 
                          Parallelization of Black Hole Codes
DynamicWebPagesgivenbyURL Title and Abstract of FakeFoilset
NPACScreenDumps97        Collection of GIF Images for General NPAC 
                          Projects  January 97-
GeneralFoils97           Variety of Foils Used Starting January 97

Table of Contents for MPI HPF and DAGH for Parallelization of Black Hole Codes 

 BBH-DAGH-HPF-Mar97Master 001 001 HPF & DAGH usage in the Binary 
                                  Black Hole Grand Challenge 
 BBH-DAGH-HPF-Mar97Master 002 002 Goals of the Alliance
DynamicWebPagesgivenbyURL 003 003 Black Hole Grand Challenge Alliance
        NPACScreenDumps97 013 004 Black Hole Initial Condition from 
                                  Scott Klasky
 BBH-DAGH-HPF-Mar97Master 003 005 Computational Infrastructure
The Physics of Colliding Black Holes 
 BBH-DAGH-HPF-Mar97Master 004 006 ADM Equations
 BBH-DAGH-HPF-Mar97Master 005 007 ADM Equations continued
 BBH-DAGH-HPF-Mar97Master 006 008 Causal Differencing
 BBH-DAGH-HPF-Mar97Master 007 009 Causal Differencing continued
 BBH-DAGH-HPF-Mar97Master 008 010 Apparent Horizon boundary conditions
Summary of Computational Issues 
 BBH-DAGH-HPF-Mar97Master 009 011 Difficulties of the BBH Problem
More Detail on Each Issue 
 BBH-DAGH-HPF-Mar97Master 010 012 DAGH System
           GeneralFoils97 019 013 Sample HPF and 
                                  DAGH codes
 BBH-DAGH-HPF-Mar97Master 014 014 Sample of HPF and DAGH code 
 BBH-DAGH-HPF-Mar97Master 011 015 Parallel Execution in DAGH 
 BBH-DAGH-HPF-Mar97Master 012 016 Parallel Execution in DAGH continued
 BBH-DAGH-HPF-Mar97Master 013 017 Implementation 
 BBH-DAGH-HPF-Mar97Master 015 018 Linear Waves 
 BBH-DAGH-HPF-Mar97Master 018 019 Linear wave problem with outer 
                                  boundary condition 
 BBH-DAGH-HPF-Mar97Master 022 020 Elliptic Problem for the shift
 BBH-DAGH-HPF-Mar97Master 016 021 Black holes (Inner boundary 
                                  condition)
 BBH-DAGH-HPF-Mar97Master 017 022 Black holes continued
 BBH-DAGH-HPF-Mar97Master 020 023 Moving Inner boundary continued
 BBH-DAGH-HPF-Mar97Master 019 024 Moving Inner boundary
 BBH-DAGH-HPF-Mar97Master 021 025 Finding the Apparent Horizon
Some Conclusions 
           GeneralFoils97 020 026 Some Conclusions on Programming 
                                  Models

List of Foils Used as they occur 

BBH-DAGH-HPF-Mar97Master Master Foilset for MPI HPF and DAGH for 
                          Parallelization of Black Hole Codes
1 2 3 4 5 6 7 8 9 10 14 11 12 13 15 18 22 16 17 20 19 21 
DynamicWebPagesgivenbyURL Title and Abstract of FakeFoilset
3 
NPACScreenDumps97        Collection of GIF Images for General NPAC 
                          Projects  January 97-
13 
GeneralFoils97           Variety of Foils Used Starting January 97
19 20

Sorted List of Foils Used 

BBH-DAGH-HPF-Mar97Master Master Foilset for MPI HPF and DAGH for 
                          Parallelization of Black Hole Codes
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 
DynamicWebPagesgivenbyURL Title and Abstract of FakeFoilset
3 
NPACScreenDumps97        Collection of GIF Images for General NPAC 
                          Projects  January 97-
13 
GeneralFoils97           Variety of Foils Used Starting January 97
19 20
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