Displays the content of the NFS server's pending request input
   queue.  Requests to the NFS server are queued to this queue
   directly by the TCP/IP network kernel at IPL 8.  Threads in the
   NFS kernel process these requests as they become available.  The
   queue's length is limited to a specific size (determined at NFS
   start time, it is related to the number of UDP threads).

   Requests on the input queue are UDP only.