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Bård Skaflestad
fed4a3bb1c
This commit introduces a new hidden runtime parameter,
ZoltanPhgEdgeSizeThreshold (--zoltan-phg-edge-size-threshold,
double, default value = 0.35)
which maps to Zoltan's low-level control parameter
PHG_EDGE_SIZE_THRESHOLD
that controls which hypergraph edges to omit/discard. We add a new
parameter to 'setupZoltanParameters()' and thread the command line
parameter through as an argument to this function.
This is to enable runtime experimentation with this aspect of the
partitioning algorithm, but end-users should typically not alter the
default value without good reason.
69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
/*
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Copyright 2022 SINTEF Digital, Mathematics and Cybernetics.
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This file is part of the Open Porous Media project (OPM).
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OPM is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OPM is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OPM. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef OPM_SETUP_PARTITIONING_PARAMS_HPP
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#define OPM_SETUP_PARTITIONING_PARAMS_HPP
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#include <map>
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#include <optional>
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#include <string>
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namespace Opm {
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/// Form collection of Zoltan partitioning parameters from named configuration
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///
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/// \param[in] conf Named Zoltan configuration. Must either be the name of a
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/// JSON configuration file with the filename extension ".json", or one of
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/// the known configuration names
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///
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/// -* graph Generates configuration parameters for the "GRAPH"
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/// load-balancing method, using the "PHG" graph package.
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///
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/// -* hypergraph Generates configuration parameters for the "HYPERGRAPH"
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/// load-balancing method.
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///
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/// -* scotch Generates configuration parameters for the "GRAPH"
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/// load-balancing method, using the "Scotch" graph package.
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///
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/// \param[in] edgeSizeThreshold Low-level Zoltan partitioning control
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/// parameter for when to omit a hyperedge in a hypergraph. Fraction in the
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/// range [0,1] representing a threshold above which to omit discard
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/// hyperedges. Used for conf="graph" and conf="hypergraph". Nullopt to
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/// use the built-in default value.
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///
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/// \return Collection of Zoltan partitioning parameters.
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std::map<std::string, std::string>
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setupZoltanParams(const std::string& conf,
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const std::optional<double>& edgeSizeThreshold = {});
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/// Form collection of METIS partitioning parameters from named configuration
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///
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/// \param[in] conf Named METIS configuration. Must either be the name of a
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/// JSON configuration file with the filename extension ".json", or the
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/// known configuration name "default" which uses the built-in default
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/// partitioning parameters.
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///
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/// \return Collection of METIS partitioning parameters.
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std::map<std::string, std::string>
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setupMetisParams(const std::string& conf);
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} // namespace Opm
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#endif // OPM_SETUP_PARTITIONING_PARAMS_HPP
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