Enable data transfers larger than 2 GiB #153
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…r size restriction
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Currently, buffer data transfers are limited to 2 GiB by the
MPI_Isend/IrecvAPI that takes 32-bit signed integer element counts. This PR increases the limit to 128GiB by transferring data as arrays of a 64-byte custom MPI type.Since the receiver side cannot recover the byte-exact frame size, we also have to drop
unique_frame_ptr::get_payload_count(), which was fortunately only used in one assertion.