Documentation for PISM, the Parallel Ice Sheet Model

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petscoptions [2012/07/21 15:41]
Ed Bueler
petscoptions [2012/07/21 15:43] (current)
Ed Bueler done for now with separate PETSc solver options FAQ page
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 ====== PETSc options appropriate to SSA solves in PISM ====== ====== PETSc options appropriate to SSA solves in PISM ======
  
-Jed Brown, [[http://​www.mcs.anl.gov/​petsc/​petsc-2/​miscellaneous/​index.html|a PETSc developer]] and an original PISM author, gave this example of comparing which were the efficient solvers for a saved, invertible linear system that came from an SSA solve.  ​Using 8  MPI processes:+Jed Brown, [[http://​www.mcs.anl.gov/​petsc/​petsc-2/​miscellaneous/​index.html|a PETSc developer]] and an original PISM author, gave this example of comparing which were the efficient solvers for a saved, invertible linear system that came from an SSA solve.  ​This example, which uses 8  MPI processes, mostly shows that no method of these is outstandingly better than another. See also the page on [[kspdiverged|diagnosing and resolving "KSP diverged"​ errors]]. 
 <​code>​ <​code>​
 # Additive Schwarz with overlap 1 # Additive Schwarz with overlap 1
petscoptions.txt · Last modified: 2012/07/21 15:43 by Ed Bueler
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