Basic HTML version of Foils prepared 17 November 1998

Foil 117 Message-Passing Abstraction e.g. MPI

From Master Foilset for HPC Achitecture Overview CPS615 Basic Simulation Track for Computational Science -- Fall Semester 98. by Geoffrey C. Fox
Send specifies buffer to be transmitted and receiving process
Receive specifies sending process and application storage to receive into
Memory to memory copy, but need to name processes
Optional tag on send and matching rule on receive
User process names local data and entities in process/tag space too
In simplest form, the send/recv match achieves pairwise synch event but also collective communication
Many overheads: copying, buffer management, protection

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