EP_Send(dest=3, tag=1, comm) mpi_tag=000000000000001 00000000 00000001 (binary) mpi_tag=65537 (decimal) MPI_Send(dest=1, tag=65537, mpi_comm) P0 0/0 1/1 EP_Recv(src=0, tag=1, comm) MPI_Recv(src=0, tag=65537, mpi_comm) tag=1 src local rank=0 P1 0/2 1/3 local rank / rank P1 P0 0/0 1/1 P1 0/2 1/3 local rank / rank mpi_tag=000000000000001 00000000 00000001 (binary) mpi_tag=65537 (decimal) tag=1 src local rank=0 dest local rank = 1 P0 dest local rank = 1 false true 50 1.0 cm false 10 0 true true true 2.0.8 1867 1176 53 24 0.8489555436529191 true true true 138