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Deterministic Message Delivery

This feature allows the user to trade performance and memory in return for deterministic delivery of messages. For a given set of message sends among multiple processors, a given destination processor will always receive the same sequence of messages. This is the case regardless of the receive criteria (requested tag and source) as long as the same receive criteria are issued in the same order each time.

In order to accomplish this, use the same library constructs as for an Asynchronous Reduction (Section 5), with the exception that AP_dsend_begin() and AP_dsend_end() are called rather than AP_send_begin() and AP_send_end()

There are several restrictions and caveats to deterministic message delivery:


next up previous contents
Next: MPI Issues Up: AUTOPACK User Manual 1 Previous: Asynchronous Reductions   Contents
Raymond Loy 2000-05-12