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Traces

• Reduce to one, two, three dimensions and display using histogram techniques.
• Gantt chart
  • Horizontal bar chart where each bar represents processor satus as a function of time (Foster, Plates 8 and 12).
  • Status (computing, communicating, idling).
  • Highlight dependencies between program components.
  • Consistent event timing amoung processors!
• Space-Time Diagrams
  • Gantt charts augmented by lines connecting send/receive events on different processors (Foster, Plate 8).
  • Identify specific events for which processor is waiting.