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71 lines
1.7 KiB
ReStructuredText
71 lines
1.7 KiB
ReStructuredText
.. _parallel_compute_page:
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******************
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Parallel Computing
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******************
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.. warning::
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This functionality is a work in progress.
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It is only available for NETGEN.
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It is only available in TUI.
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The goal here is to speed up computation by running sub-meshes in parallel
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(multi-threading).
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*******
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Concept
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*******
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.. image:: ../images/diagram_parallel_mesh.png
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In order to parallelise the computation of the mesh we split the geometry into:
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* A 1D+2D compound
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* A list of 3D solids
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Then create a sub-mesh for each of those geometry.
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And associate Hypothesis to the mesh using a hypothesis on the whole geometry
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We will first compute sequentially the 1D+2D compound with NETGEN_1D2D.
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Then we will compute all the solids in parallel. Having done the 1D+2D first
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ensure that all the solids can be computed without any concurrency.
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******
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How to
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******
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You follow the same principle as the creation of a sequential Mesh.
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#. First you create the mesh:
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.. code-block:: python
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par_mesh = smesh.ParallelMesh(geom, name="par_mesh")
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#. Define the Global Hypothesis that will be split into an hypothesis for the
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1D+2D compound and one for each of the 3D solids:
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.. code-block:: python
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NETGEN_3D_Parameters_1 = smesh.CreateHypothesisByAverageLength( 'NETGEN_Parameters',
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'NETGENEngine', 34.641, 0 )
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par_mesh.AddGlobalHypothesis(netgen_parameters)
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#. Set the parameters for the parallelisation:
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.. code-block:: python
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param = par_mesh.GetParallelismSettings()
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param.SetNbThreads(6)
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#. Compute the mesh:
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.. code-block:: python
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mesh.Compute()
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**See Also** a sample script of :ref:`tui_create_parallel_mesh`.
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