OilfieldToolsNet/opm-simulators
4
0
Fork 0
mirror of https://github.com/OPM/opm-simulators.git synced 2025-01-01 03:56:55 -06:00
Code Issues Packages Projects Releases Wiki Activity

Always accumulates data in AMG to 1 process on coarse levels.

Browse Source 
In OPM the matrix graph might be unsymmetric as we do not store
the full sparsity pattern for copy rows but only the diagonal.
Unfortunately, DUNE assumes that matrices from finite elements and
finite volumes have a symmetric sparsity pattern for copy rows to
and uses this assumption to create the graphs for PTScotch/ParMETIS
more easily. But PTScotch/ParMetis assume a symmetric graph.
This commit is contained in:
Markus Blatt 2020-11-03 22:00:04 +01:00
parent 0102287de0
commit d83ae17e5b
2 changed files with 12 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
opm/simulators/linalg/PreconditionerFactory.hpp
View File

@ -134,6 +134,10 @@ private:
criterion.setNoPreSmoothSteps(prm.get<int>("pre_smooth", 1));
criterion.setNoPostSmoothSteps(prm.get<int>("post_smooth", 1));
criterion.setDebugLevel(prm.get<int>("verbosity", 0));
// As the default we request to accumulate data to 1 process always as our matrix
// graph might be unsymmetric and hence not supported by the PTScotch/ParMetis
// calls in DUNE. Accumulating to 1 skips PTScotch/ParMetis
criterion.setAccumulate(static_cast<Dune::Amg::AccumulationMode>(prm.get<int>("accumulate", 1)));
return criterion;
}

8
opm/simulators/linalg/setupPropertyTree.cpp
View File

@ -61,6 +61,10 @@ setupCPR(const std::string& conf, const FlowLinearSolverParameters& p)
prm.put("preconditioner.coarsesolver.preconditioner.verbosity", 0);
prm.put("preconditioner.coarsesolver.preconditioner.maxlevel", 15);
prm.put("preconditioner.coarsesolver.preconditioner.skip_isolated", 0);
// We request to accumulate data to 1 process always as our matrix
// graph might be unsymmetric and hence not supported by the PTScotch/ParMetis
// calls in DUNE. Accumulating to 1 skips PTScotch/ParMetis
prm.put("preconditioner.coarsesolver.preconditioner.accumulate", 1);
return prm;
}
@ -85,6 +89,10 @@ setupAMG([[maybe_unused]] const std::string& conf, const FlowLinearSolverParamet
prm.put("preconditioner.verbosity", 0);
prm.put("preconditioner.maxlevel", 15);
prm.put("preconditioner.skip_isolated", 0);
// We request to accumulate data to 1 process always as our matrix
// graph might be unsymmetric and hence not supported by the PTScotch/ParMetis
// calls in DUNE. Accumulating to 1 skips PTScotch/ParMetis
prm.put("preconditioner.accumulate", 1);
return prm;
}