Point-to-Point Communication

• Introduction and Overview
• Blocking Send and Receive Operations
  • Blocking Send
  • Send Buffer and Message Data
  • Message Envelope
  • Comments on Send
  • Blocking Receive
  • Receive Buffer
  • Message Selection
  • Return Status
  • Comments on Receive
• Datatype Matching and Data Conversion
  • Type Matching Rules
    • Type MPI_CHARACTER
  • Data Conversion
  • Comments on Data Conversion
• Semantics of Blocking Point-to-point
  • Buffering and Safety
  • Multithreading
  • Order
  • Progress
  • Fairness
• Example - Jacobi iteration
• Send-Receive
• Null Processes
• Nonblocking Communication
  • Request Objects
  • Posting Operations
  • Completion Operations
  • Examples
  • Freeing Requests
  • Semantics of Nonblocking Communications
    • Order
    • Progress
    • Fairness
    • Buffering and resource limitations
  • Comments on Semantics of Nonblocking Communications
• Multiple Completions
• Probe and Cancel
• Persistent Communication Requests
• Communication-Complete Calls with Null Request Handles
• Communication Modes
  • Blocking Calls
  • Nonblocking Calls
  • Persistent Requests
  • Buffer Allocation and Usage
  • Model Implementation of Buffered Mode
  • Comments on Communication Modes