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@@ -347,9 +347,9 @@ Create a task corresponding to codelet with the following arguments.
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The argument list must be zero-terminated. The function performs the
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first two steps of the function starpu_mpi_task_insert(). Only the MPI
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node selected in the first step of the algorithm will return a valid
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-task structure which can then be submitted. The function
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-starpu_mpi_task_post_build() MUST be called after the submission of
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-the task, with the SAME list of arguments.
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+task structure which can then be submitted, others will return NULL. The function
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+starpu_mpi_task_post_build() MUST be called after that on all nodes, and after the submission of
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+the task on the node which creates it, with the SAME list of arguments.
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\fn int starpu_mpi_task_post_build(MPI_Comm comm, struct starpu_codelet *codelet, ...)
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\ingroup API_MPI_Support
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