4. Point to point communication: the message passing pattern

The fundamental basis of coordination between independent processes is point-to-point communication between processes through the communication links in a communicator such as MPI_COMM_WORLD. This form of point-to-point communication is called message passing, where one process sends data to another one, who in turn must receive it from the sender. This is illustrated as follows:

How processes communicate

• 4.1. Message Passing Pattern: Key Problem
  • 4.1.1. Explore the code
• 4.2. Message Passing Patterns: avoiding deadlock
  • 4.2.1. Fix the deadlock
  • 4.2.2. Sending data structures
  • 4.2.3. Ring of passed messages

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