Visualizing Objects and Memory Usage
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Presentation of the research paper entitled "Visualizing Objects and Memory Usage" in Smalltalks 2010, Concepci坦n del Uruguay, Argentina.
Visualizing Objects and Memory Usage
- 1. Visualizing Objects and Memory Usage I n g . m a r i a n o m a rt i n e z p e c k m a r i a n o p e c k @ g m a i l . c o m 1 Saturday, November 13, 2010
- 2. The context 2 Saturday, November 13, 2010
- 3. The context 2 Saturday, November 13, 2010
- 4. The context 2 Saturday, November 13, 2010
- 5. The context 2 Saturday, November 13, 2010
- 6. The context 2 Saturday, November 13, 2010
- 7. 1st step: UNDERSTAND. To understand: VISUALIZATIONS. 3 Saturday, November 13, 2010
- 8. Problem How to visualize objects and memory usage. Special treatment for classes, methods and packages. Take into account objects usage. 4 Saturday, November 13, 2010
- 9. Regarding related work... no one solves the problem of taking into account objects usage. 5 Saturday, November 13, 2010
- 10. Our solution Trace objects usage. Use DistributionMaps to visualize the results. 6 Saturday, November 13, 2010
- 11. Moose is a platform for software and data analysis 7 Saturday, November 13, 2010
- 12. DistributionMap Distribution Map visualizes parts of a system and shows how properties of the part elements spread over the initial parts. part 1 part 2 part 3 Property1 Property2 Property3 part 5 part 4 Element Property4 Container 8 Saturday, November 13, 2010
- 13. JBOSS example 9 Saturday, November 13, 2010
- 14. Used Object Maps Distribution Maps that take into account objects and memory usage 10 Saturday, November 13, 2010
- 15. How to use them? 1.Start the analysis. 2.Run the scenario to analyze. 3.Stop the analysis. 4.Visualize using DistributionMaps. 11 Saturday, November 13, 2010
- 16. SHOWTIME 12 Saturday, November 13, 2010
- 17. Tracing Objects Usage Usage bit in the Object Header (Virtual Machine). De鍖ne when an objects is marked as used?. Modify VM to mark objects when used. 13 Saturday, November 13, 2010
- 18. when an objects is marked as used? Quick answer: when it receives a message. When the VM directly use it. When used by special VM bytecodes (#class, #==, etc). 14 Saturday, November 13, 2010
- 19. Showtime 2 15 Saturday, November 13, 2010
- 20. Possible uses When building minimal images. Virtual memory implementations. Detect bad smells or possible overuse of memory. Detect opportunities of refactorings. 16 Saturday, November 13, 2010
- 21. conclusions and future work Use Distribution Maps and distinguish between used and unused instances. Useful to analyze the system and to know which objects are used in different scenarios. DistributionMap comparator. Saturday, November 13, 2010
- 22. Thanks! Mariano Martinez Peck marianopeck@gmail.com Saturday, November 13, 2010