mpi4py #454
mpi4py #454
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src/binding/python/Series.cpp
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| //! https://bitbucket.org/mpi4py/mpi4py/src/3.0.0/demo/wrap-c/helloworld.c | ||
| // if( import_mpi4py() < 0 ) { here be dragons } | ||
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| MPI_Comm *mpiCommPtr = PyMPIComm_Get(comm.ptr()); |
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| //! @todo perform mpi4py import test? | ||
| //! required C-API init? | ||
| //! https://bitbucket.org/mpi4py/mpi4py/src/3.0.0/demo/wrap-c/helloworld.c | ||
| // if( import_mpi4py() < 0 ) { here be dragons } |
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trying to avoid mpi4py/mpi4py.h include:
Function generated during build. This just seems to import and perform tests on functions and type signatures for binary compatibility (e.g. the usual: MPI during build time must be MPI at runtime).
Afterwards the imported test module is unloaded again. We can probably skip it and check e.g. versions with pybind11's import method.
ax3l
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CMakeLists.txt
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| @@ -276,6 +276,11 @@ if(openPMD_HAVE_PYTHON) | |||
| INTERFACE pybind11::pybind11) | |||
| endif() | |||
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| # TODO: Check if mpi4py is available | |||
| # ref: https://github.com/ornladios/ADIOS2/blob/v2.3.0/cmake/FindPythonModule.cmake | |||
| # find_package(PythonModule REQUIRED COMPONENTS mpi4py mpi4py/mpi4py.h) | |||
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src/binding/python/Series.cpp
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| "(Mismatched MPI at compile vs. runtime?)"); | ||
| } | ||
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| return new Series(filepath, at, *mpiCommPtr); //! @todo do we already clone the communicator? |
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| ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/${examplename}.py | ||
| WORKING_DIRECTORY ${CMAKE_RUNTIME_OUTPUT_DIRECTORY} | ||
| ) | ||
| endif() |
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Add bindings for passing an mpi4py MPI communicator to our Python `Series` object. Also prepare CMake logic for examples.
translate the parallel C++ examples to Python
Document required versions and its support.
| // pyMPI: ... (todo) | ||
| py::str const comm_pystr = py::repr(comm); | ||
| std::string const comm_str = comm_pystr.cast<std::string>(); | ||
| if( comm_str.substr(0, 12) != std::string("<mpi4py.MPI.") ) |
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Should probably only match mpi4py Communicators (and derived/same-layouted objects)
Define an "openPMD-api[mpi]" optional variant in setup.py, which will pull mpi4py.
Add support for MPI-parallel I/O in python3 bindings.
Close #99
To Do
setup.py