1. Visualization tool of the T-application execution trace
Kovalenko M.R., PSI RAS, PSTA’2006 Pereslavl-Zalesskij, PSI RAS,

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 of T-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 characteristics on 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 time of MPI communications
Total idle time
Info about OpenTS messages passed 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
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-visualizator GUI 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 representation subcomponent
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 controls subcomponent
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
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