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add comm size check to blt mpi smoke#754

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cyrush wants to merge 1 commit intodevelopfrom
task/2026_02_blt_mpi_more_smoke
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add comm size check to blt mpi smoke#754
cyrush wants to merge 1 commit intodevelopfrom
task/2026_02_blt_mpi_more_smoke

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@cyrush cyrush commented Feb 4, 2026

resolves #753, helps detect mpi env puzzles earlier

MPI_Comm_size(MPI_COMM_WORLD, &commSize);

// this test should be using 4 mpi tasks, check the commSize
if(commSize != 4)
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Can you add a comment here and at the blt_add_test that says these numbers should be in sync?

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blt mpi smoke test may need more smoke

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