Msg Passing: Lowest Common Denominator

Message passing ...



• Intended for programmers
• Standard libraries (PVM, MPI) give std interface
• Most (new) machines have other forms of (more efficient) communication

Made into Message, “sent”

Arrives

A

Strided in memory

Marshalled in pgm

Copied by library

Scattered in memory

Returned to pgm

Buffered by library

Pi

Pi+1

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