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Profiles

• Display amount of time spent in different program components.
• Application of sampling techniques.
  • Simple but not necessarily highly accurate.
  • Value of program counter is determined at fixed intervals.
  • Histogram of execution frequencies.
• Advantages:
  • Automatic generation at low costs.
  • Small amount of data.
  • High-level view of program behavior.
• Limitations:
  • No temporal aspects of execution.

First technique for seeking to understand parallel program performance.