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Visualization tool of the T-application execution trace

Visualization tool of the T-application execution trace. Kovalenko M . R., PSI RAS , PSTA’2006 Pereslavl-Zalesskij , PSI RAS , 2006-10-25. Objects of development . Tasks accomplished using T-visualizator. Take and examine t-application execution trace

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Visualization tool of the T-application execution trace

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  1. Visualization tool of theT-application execution trace KovalenkoM.R., PSI RAS,PSTA’2006Pereslavl-Zalesskij, PSI RAS, 2006-10-25

  2. Objects of development.Tasks accomplished using T-visualizator. • Take and examine t-application execution trace • Illustration of T-application computation runtime • Data collecting for execution analysis, debugging and tuning of T-application • OpenTS studying tool

  3. Architecture ofT-visualizator • OpenTS feature—“vistrace”—extension component for taking execution trace • GUI component—visualizator of collected trace data

  4. OpenTS extension “vistrace” • Pickup of T-application characteristicson every T-process every time tick (1/25 sec. for default) • Collecting data from computation nodes to root node using MPI messages. • Capsulation of frame/slice of execution state • Data recording in XML format

  5. OpenTS characteristics picked up by “vistrace” component • Resource data: • Available memory • Computation node productivity • T-application state data: • Spawned tasks • Prenatal tasks • Exported/Imported tasks • Active tasks • Suspended tasks • Finished tasks

  6. OpenTS characteristics picked up by “vistrace” component • Times: • Total OpenTS tasks computation time • Total time spent in scheduler • Total timeof MPI communications • Total idle time • Info about OpenTS messagespassed during execution (5 message types)

  7. GUI visualization component.Implementation of visualizator • GTK+ — multi-platform toolkit for creating graphical user interfaces • OS: Linux, Windows • Architectures: x86(ia32), x86_64 (AMD64, EM64T)

  8. Visualizator.Operation modes.Methods of input data processing.Pros and cons of various approaches • Process all trace input data at once. • Extended and suitable trace investigation • Requires significant resources • Process trace input data in stream way. • Limited set of trace investigation controls • Unlimited input data size

  9. Architecture of visualizator. GUI subcomponents. • Stats display GUI subcomponent • GUI subcomponent for T-application processes states representation • Trace playback/investigation controls

  10. T-visualizatorGUI component

  11. Visualizator.Statistics subcomponent • Per proc stats • Number of OpenTS tasks in various states • Sent/received OpenTS messages statistics • Elapsed time stats • Statistics summarized for all nodes • T-application trace and T-visualizator general info

  12. Visualizator.T-application processes states representationsubcomponent • OpenTS processes represented as circles with status bars • Interprocess OpenTS messages represented as arcs • Ability to move and place nodes in suitable way • Informational elements on messages arcs • Popup info tooltips

  13. Visualizator.Trace playback controlssubcomponent • Control buttons: • “Rewind (Select first frame/slice)” • “Back (Select previous frame)” • “Play” • “Pause” • “Next (Select next frame)” • “Forward (Select last frame)” • Limitations of stream mode (only “play”, “pause” and “next” available)

  14. Example of T-application trace investigation

  15. Example of T-application trace investigation

  16. Example of T-application trace investigation

  17. Example of T-application trace investigation

  18. Example of T-application trace investigation

  19. Thanks … … any questions ??? … …

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