COMPENSATION OF MEASUREMENT OVERHEAD IN PARALLEL PERFORMANCE PROFILING.

The article presents a study which discusses the use of performance profiling in the measurement overhead of parallel message passing program execution. It offers four important outcomes including message passing interface (MPI) profiling support, schemes to local delays, tuning and analysis utilities (TAU) overhead compensation prototype and the transmission of delay information with messages. It was observed that the most parallel performance measurement tools ignore the overhead incurred by their use. It is concluded that the performance uncertainty principle implies accuracy of performance data and is inversely correlated with the degree of performance instrumentation.