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Don't call MPI_Comm_split if NCCL_TESTS_SPLIT_MASK is not set #151

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Don't call MPI_Comm_split if NCCL_TESTS_SPLIT_MASK is not set #151

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Commits on Jun 30, 2023

  1. Don't call MPI_Comm_split if NCCL_TESTS_SPLIT_MASK is not set 

    No need to call MPI_Comm_split if the NCCL_TESTS_SPLIT_MASK variable
is not set. It only causes unnecessary traffic with no real effect,
and in some cases might cause the ranks be invalid.

Signed-off-by: Tadeusz Struk <[email protected]>
    @tstruk
    tstruk committed Jun 30, 2023
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