Parallel HDF5: Try fixing strict collective requirements of HDF5 >= 2.0 #1862

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Draft

franzpoeschel wants to merge 114 commits into openPMD:dev from franzpoeschel:fix-parallel-hdf5

GitHub Advanced Security / CodeQL succeeded Apr 29, 2026 in 2s

32 new alerts

New alerts in code changed by this pull request

1 warning
31 notes

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Check warning on line 152 in src/IO/AbstractIOHandlerImpl.cpp

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Poorly documented large function Warning

Poorly documented function: fewer than 2% comments for a function of 431 lines.

Check notice on line 410 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function openPMD_parallel_hdf5_write_test_skip_declare is unreachable (

must be removed at the same time)
Static function openPMD_parallel_hdf5_write_test_skip_declare is unreachable (

must be removed at the same time)

Check notice on line 410 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function CATCH2_INTERNAL_TEST_10 is unreachable (

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Check notice on line 756 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function openPMD_parallel_write_4D_test is unreachable (

must be removed at the same time)
Static function openPMD_parallel_write_4D_test is unreachable (

must be removed at the same time)

Check notice on line 756 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function CATCH2_INTERNAL_TEST_12 is unreachable (

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Unused static function Note test

Static function openPMD_parallel_write_makeconst_some is unreachable (

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Static function openPMD_parallel_write_makeconst_some is unreachable (

must be removed at the same time)

Check notice on line 789 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function CATCH2_INTERNAL_TEST_14 is unreachable (

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Unused static function Note test

Static function openPMD_parallel_close_iteration_test is unreachable (

must be removed at the same time)
Static function openPMD_parallel_close_iteration_test is unreachable (

must be removed at the same time)

Check notice on line 896 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function CATCH2_INTERNAL_TEST_16 is unreachable (

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Unused static function Note test

Static function openPMD_parallel_file_based_write_read is unreachable (

must be removed at the same time)
Static function openPMD_parallel_file_based_write_read is unreachable (

must be removed at the same time)

Check notice on line 1015 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function CATCH2_INTERNAL_TEST_18 is unreachable (

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Unused static function Note test

Static function openPMD_parallel_hipace_like_write is unreachable (

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Static function openPMD_parallel_hipace_like_write is unreachable (

must be removed at the same time)

Check notice on line 1195 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function CATCH2_INTERNAL_TEST_20 is unreachable (

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Unused static function Note test

Static function openPMD_parallel_unavailable_backend is unreachable (

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Static function openPMD_parallel_unavailable_backend is unreachable (

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Check notice on line 1239 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function CATCH2_INTERNAL_TEST_22 is unreachable (

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Check notice on line 2740 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function openPMD_parallel_bug_1655_bp5_writer_hangup is unreachable (

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Static function openPMD_parallel_bug_1655_bp5_writer_hangup is unreachable (

must be removed at the same time)

Check notice on line 2740 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function CATCH2_INTERNAL_TEST_24 is unreachable (

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Unused static function Note test

Static function CATCH2_INTERNAL_TEST_8 is unreachable (

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Check notice on line 396 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function openPMD_parallel_hdf5_write_test_skip_chunk is unreachable (

must be removed at the same time)
Static function openPMD_parallel_hdf5_write_test_skip_chunk is unreachable (

must be removed at the same time)

Check notice on line 390 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function CATCH2_INTERNAL_TEST_6 is unreachable (

must be removed at the same time)

Check notice on line 390 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function openPMD_parallel_hdf5_write_test_zero_extent is unreachable (

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Static function openPMD_parallel_hdf5_write_test_zero_extent is unreachable (

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Unused static function Note test

Static function CATCH2_INTERNAL_TEST_4 is unreachable (

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Check notice on line 320 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function openPMD_parallel_hdf5_write_test is unreachable (

must be removed at the same time)
Static function openPMD_parallel_hdf5_write_test is unreachable (

must be removed at the same time)

Check notice on line 236 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function CATCH2_INTERNAL_TEST_2 is unreachable (

must be removed at the same time)

Check notice on line 236 in test/ParallelIOTest.cpp

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Unused static function Note test

Static function openPMD_parallel_git_hdf5_sample_content_test is unreachable (

must be removed at the same time)
Static function openPMD_parallel_git_hdf5_sample_content_test is unreachable (

must be removed at the same time)