J. Galarowics and B. Mohr. Analyzing message passing programs on the Cray T3E with PAT and VAMPIR. Technical report, ZAM Forschungszentrum: Juelich, Germany, 1998.  Home/Search   Document Details and Download   Summary   Related Articles   Check

....POMP interface in conjunction with OPARI for instrumentation of OpenMP programs. 2.4 Binary instrumentation Executable images can be instrumented using binary code rewriting techniques, often referred to as binary editing tools or executable editing tools. Systems such as Pixie, EEL [9] and PAT [10] include an object code instrumentor that parses an executable and 8 rewrites it with added instrumentation code. PAT can be used for call site profiling and instrumentation at the routine level as well as gathering routine level hardware performance statistics. Pixie can count basic blocks within ....

Galarowics, J. and B. Mohr, Analyzing Message Passing Programs on the Cray T3E with PAT and VAMPIR. 1998, ZAM Forschungszentrum: Juelich, Germany.

....and the tools we can use to interpret the data have major impact on the quality of our hypothesis. We can get the most detailed view on the behavior of the parallel application by tracing runtime events that determine its performance properties. This task can be performed by tools like PAT [4]. Then, a performance problem can be considered as an event pattern or compound event which has to be detected in the event trace after program termination. The compound event is built from primitive events such as those associated with entering a program region or sending a message. One advantage ....

Jim Galarowicz and Bernd Mohr. Analyzing Message Passing Programs on the Cray T3E with PAT and VAMPIR. In H. Lederer and F. Hertwick, editors, Proceedings of Fourth European CRAY-SGI MPP Workshop, pages 29--49, Garching/Munich (Germany) , October 1998.

....static and dynamic instrumentation. Whereas for static instrumentation this decision is made once before running the application, dynamic instrumentation allows to change theses parameters during runtime. There are a multitude of tools for static as well as dynamic instrumentation like PAT [5] and Dyninst [8] In most cases, the information recorded for a runtime event includes at least a time stamp, the location, e.g. the process or node, where the event happened, and the type of the event. Depending on the event type additional information may be supplied such as the function name ....

J. Galarowicz and B. Mohr. Analyzing Message Passing Programs on the Cray T3E with PAT and VAMPIR. In H. Lederer and F. Hertwick, editors, Proceedings of Fourth European CRAY-SGI MPP Workshop, pages 29--49, Garching/Munich (Germany), October 1998.

....execution of the application itself. The data collected gives a coarse overview of sustained performance of all applications of a T3E system and provides hints which codes should be analyzed in more detail. If more precise data is needed, the regular CRAY T3E performance tools Apprentice and PAT [2] or Rabenseifner s methods [4, 5, 6] can be used. Based on the techniques used for TOPAS ( sitelocal start and atexit ) his work even could be extended to cover PVM and SHMEM programs, too. 6 Acknowledgements The author wants to thank Reiner Vogelsang who was instrumental in understanding the ....

J. Galarowicz, B. Mohr, Analyzing Message Passing Programs on the Cray T3E with PAT and VAMPIR, Proceedings of 4th European CRAY-SGI MPP Workshop, Eds.: H. Lederer, F. Hertwick, IPP-Report des MPI fr Plasmaphysik, Garching, IPP R/46, 29-49 (also Technical Report FZJ-ZAM-IB-9809, Forschungszentrum Jlich), 1998.

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J. Galarowics and B. Mohr. Analyzing message passing programs on the Cray T3E with PAT and VAMPIR. Technical report, ZAM Forschungszentrum: Juelich, Germany, 1998.

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