Yes, all datatypes are supported. -- Hui Zhou ________________________________ From: Palmer, Bruce J via discuss <[email protected]> Sent: Wednesday, July 13, 2022 5:29 PM To: [email protected] <[email protected]> Cc: Palmer, Bruce <[email protected]> Subject: [mpich-discuss] GPU-aware MPICH Hi, Does anyone know if GPU-aware MPICH supports MPI datatypes? In particular, can you use the subarray datatype (created with MPI_Type_create_subarray)? Bruce Palmer