MPI_Ibsend(buf, count, datatype, dest, tag, comm, request, ierror)
<type> buf(*)
integer count, datatype, dest, tag, comm, request, ierror
　　非阻塞缓冲区发送

MPI_Init(ierror)
integer ierror
　　MPI执行环境初始化

MPI_Initialized(flag, ierror)
logical flag
integer ierror
　　查询MPI_Init是否已经调用

MPI_Intercomm_create(local_comm, local_leader, peer_comm,
remote_leader, tag, newintercomm, ierror)
integer local_comm, local_leader, peer_comm, remote_leader, tag,
newintercomm, ierror
　　根据两个组内通信域创建一个组间通信域

MPI_Intercomm_merge(intercomm, high, intracomm, ierror)
integer intercomm, intracomm, ierror
logical high
　　根据组间通信域创建一个组内通信域

MPI_Iprobe(source, tag, comm, flag, status, ierror)
integer source, tag, comm, status(*), ierror
　　非阻塞消息测试

MPI_Irecv(buf, count, datatype, source, tag, comm, request, ierror)
<type> buf(*)
integer count, datatype, source, tag, comm, request, ierror
　　非阻塞接收

MPI_Irsend(buf, count, datatype, dest, tag, comm, request, ierror)
<type> buf(*)
integer count, datatype, dest, tag, comm, request, ierror
　　非阻塞就绪发送

MPI_Isend(buf, count, datatype, dest, tag, comm, request, ierror)
<type> buf(*)
integer count, datatype, dest, tag, comm, request, ierror
　　非阻塞发送

MPI_Issend(buf, count, datatype, dest, tag, comm, request, ierror)
<type> buf(*)
integer count, datatype, dest, tag, comm, request, ierror
　　非阻塞同步发送