02f8215b25
Per MPI 3.1 chapter 13.3 : "Derived etypes can be constructed by using any of the MPI datatype constructor routines, provided all resulting typemap displacements are non-negative and monotonically nondecreasing." Same restriction applies to ftypes. add the OMPI_DATATYPE_CHECK_FOR_VIEW() macro that is check the underlying opal_datatype_t is monotonic, on top of all checks performed in OMPI_DATATYPE_CHECK_FOR_RECV(). Since checking monotoniciy is expensive, check is only performed when needed, but the result is cached by ompi_datatype_is_monotonic(). Thanks Wei-keng Liao for the valuable feedback. Thanks George for the guidance. Refs. open-mpi/ompi#4682 Signed-off-by: Gilles Gouaillardet <gilles@rist.or.jp> |
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