gtpm3m0o | Multi-Processor Interconnect Facility Reference |
MPIF supports three types of priorities that can be specified by the user in a SEND Request parameter list:
Requests specifying normal priority are serviced in the order they are issued, using a first-in, first-out method.
A control message request that is waiting to be transferred on the same path and destination as a normal request will be serviced before the normal request. Multiple requests indicating control message priority are treated equally, using the first-in, first-out method.
A request with dispatching priority can specify initial dispatching from the ready list or the input list, in the system to which the SEND request is transferred.