Towards the impact of design flaws on resources used by an application
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This document discusses two case studies that analyze the impact of design flaws on resource usage in software applications. The first case study uses a simple example to show that a "data class" design flaw increases memory and CPU usage. The second case study analyzes the open source application JhotDraw 5.4, refactoring flaws like cyclic dependencies and data clumps, and finding that memory usage decreased in all refactored versions while CPU usage varied. The document concludes that design flaws can influence resource usage like memory and CPU time, and that further studies on other systems could provide more evidence.
![2. Related work
Some work in this direction was done
Hindle performed a study that investigates the
correlation between software changes and energy
consumption [1] (energy consumption scales linearly
with resource usage, according to [3])
He does not take isolated changes
Grosskop and Visser [2] proposed an energy model
for an application and some application-level
optimizations, but they are not related to design
flaws](https://image.slidesharecdn.com/prezentaretaiata-140618192656-phpapp01/85/Towards-the-impact-of-design-flaws-on-resources-used-by-an-application-5-320.jpg)
![3. Case Study A scenarios
(from [4])](https://image.slidesharecdn.com/prezentaretaiata-140618192656-phpapp01/85/Towards-the-impact-of-design-flaws-on-resources-used-by-an-application-7-320.jpg)
![3. Case Study A results (from
[4])](https://image.slidesharecdn.com/prezentaretaiata-140618192656-phpapp01/85/Towards-the-impact-of-design-flaws-on-resources-used-by-an-application-8-320.jpg)
![3. Case Study B resuls (from
[4])](https://image.slidesharecdn.com/prezentaretaiata-140618192656-phpapp01/85/Towards-the-impact-of-design-flaws-on-resources-used-by-an-application-10-320.jpg)
![6. References
[1] A. Hindle, “Green mining: Investigating power consumption across
versions.” in ICSE, M. Glinz, G. C. Murphy, and M. Pezz, Eds. IEEE,
2012, pp. 1301–1304. [Online]. Available: http://dblp.uni-trier.de/db/
conf/icse/icse2012.html#Hindle12
[2] K. Grosskop and J. Visser, “Identification of application-level energy
optimizations,” in Proceedings of ICT for Sustainability (ICT4S
2013), 2013, pp. 101–107
[3] X. Fan, W.-D. Weber, and L. A. Barroso, “Power provisioning for a
warehouse-sized computer,” in The 34th ACM International
Symposium on Computer Architecture, 2007..
[4] „Towards the Impact of Design Flaws on the Resources used
by an Application” by Cristina Marinescu, Serban Stoenescu
and Teodor-Florin Fortis](https://image.slidesharecdn.com/prezentaretaiata-140618192656-phpapp01/85/Towards-the-impact-of-design-flaws-on-resources-used-by-an-application-16-320.jpg)
Towards the impact of design flaws on resources used by an application
- 1. Towards the Impact of Design Flaws on the Resources used by an Application Candidate: Şerban STOENESCU Supervisor: Assistant Professor, PhD. Eng. Cristina MARINESCU
- 3. Content 1. Introduction 2. Related Work 3. Case Studies 4. Results Interpretation 5. Conclusions and Future Work 6. References
- 4. 1. Introduction Do design flaws have an impact on resource usage? We performed two case studies – A very simple one – A large, well-known open source system Tools used: InFusion http://www.intooitus.com/products/infusion Hyperic SIGAR http://www.hyperic.com/products/sigar
- 5. 2. Related work Some work in this direction was done Hindle performed a study that investigates the correlation between software changes and energy consumption [1] (energy consumption scales linearly with resource usage, according to [3]) He does not take isolated changes Grosskop and Visser [2] proposed an energy model for an application and some application-level optimizations, but they are not related to design flaws
- 6. 3. Case Study Setup: Case Study A Simple case study Tackles one design flaw: Data Class
- 7. 3. Case Study A scenarios (from [4])
- 8. 3. Case Study A results (from [4])
- 9. 3. Case Study Setup: Case Study B Takes on a larger system: JhotDraw 5.4 We run unit tests for the original version We measure the resource usage We refactor design flaws After removing/reducing each design flaw, we run the tests again and perform the measurements again The source code for the refactorings are available at http://cs.upt.ro/~cristina/jhotdraw-refactorings.zip
- 10. 3. Case Study B resuls (from [4])
- 11. 4. Case Study A: Results Interpretation Memory and CPU usage are higher in Scenario 2 (with Data Class)
- 12. 4. Case Study B: Results Interpretation Design flaws do have an impact on resource usage In all versions, the used memory is less than in the original version The CPU usage varies both upwards and downwards compared to the initial version
- 13. 5. Conclusions and Future Work We provide evidence of the impact of various design flaws on the resource usage of a software system We showed that: – They influence CPU time – They increase memory usage
- 14. 5. Conclusions and Future Work (continued) Design flaws implied: - Cyclic Dependencies - Data Clumps - Blob Operations - Data Classes - God Class - Intensive Coupling, - Feature Envy - Schizophrenic Classes
- 15. 5. Conclusions and Future Work (continued) The experiment is dependent on the test cases available Further investigations on other systems can be done An application can be deployed in a cloud environment and the same measurements can be performed again
- 16. 6. References [1] A. Hindle, “Green mining: Investigating power consumption across versions.” in ICSE, M. Glinz, G. C. Murphy, and M. Pezz, Eds. IEEE, 2012, pp. 1301–1304. [Online]. Available: http://dblp.uni-trier.de/db/ conf/icse/icse2012.html#Hindle12 [2] K. Grosskop and J. Visser, “Identification of application-level energy optimizations,” in Proceedings of ICT for Sustainability (ICT4S 2013), 2013, pp. 101–107 [3] X. Fan, W.-D. Weber, and L. A. Barroso, “Power provisioning for a warehouse-sized computer,” in The 34th ACM International Symposium on Computer Architecture, 2007.. [4] „Towards the Impact of Design Flaws on the Resources used by an Application” by Cristina Marinescu, Serban Stoenescu and Teodor-Florin Fortis
- 17. Thank you for your attention!