Partial assembly support using libCEED #64
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…ce" configuration file options
…er assembly of multigrid hierarchy, partial assembly for auxiliary operators and solvers (postprocessing, div-free solver, etc.)
…hreshold below which operators are fully assembled Also adds option for libCEED multigrid transfer operators.
…level operators for multigrid
…rmSolver -> EnergyNormSolver
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This PR adds support for operator partial assembly for meshes containing either tensor-product elements or simplex elements using the libCEED library. This makes use of some recent improvements adding support for H(div) and H(curl) elements in libCEED, see CEED/libCEED#1265 and CEED/libCEED#1156.
This resolves the first part of #3. As the libCEED H(curl) and H(div) support does not yet include GPU-backends, the rest of #3 remains in progress and will come at a later date. For now, PA is disabled by default and must be enabled by the user with the
"PartialAssemblyOrder"and"Device"configuration file keywords. In the future we will come up with easier default options to make use of PA.This PR is a follow-up to the changes in for #47. Since this PR contains some follow-up changes to changes also made in this PR, I propose we review both simultaneously and only merge #47 quickly followed by #64 once comments with both have been addressed and they are both approved.
TODO