A probe effect in concurrent programs
Software—Practice & Experience
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PADD '91 Proceedings of the 1991 ACM/ONR workshop on Parallel and distributed debugging
On efficiently implementing global time for performance evaluation on multiprocessor systems
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Experimental evaluation of on-line techniques for removing monitoring intrusion
SPDT '98 Proceedings of the SIGMETRICS symposium on Parallel and distributed tools
Time, clocks, and the ordering of events in a distributed system
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On Correcting the Intrusion of Tracing Non-deterministic Programs by Software
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Proceedings of the 5th European PVM/MPI Users' Group Meeting on Recent Advances in Parallel Virtual Machine and Message Passing Interface
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Software analysis tools apply monitors to retrieve state information about program executions. Unfortunately such observation introduces the probe effect, which means that analysis data are influenced by the monitor's requirements to computing time and space. Additionally, nondeterministic parallel programs may yield different execution patterns due to alterations of event ordering at race conditions. In order to correct these intrusions, two activities are carried out. Firstly, the monitor overhead is removed by recalculating event occurrence times based on measurements of the occurred delay. Secondly, event manipulation and program replay is applied at places, where reordering of events has occurred. The resulting data describes the program's execution without monitoring.