User Defined Tracing

• PVM 3.4 uses standard SDDF trace format

• Tracing can be buffered to reduce intrusion

• Tracing can be turned on/off within application

• User can select which events to trace

• User can define their own trace events

  • eg. write a trace event everytime task computes “B”

XPVM 1.2 modified to handle the new trace format

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