2. Framework for Evaluating Distributed Smalltalk Interface Jan Lukeš xlukesj@fel.cvut.cz Czech Technical University

3. Contents Framework Intention Distributed Systems User Interface Measurements Results Visualization Implementation Summary Future Work

4. Framework Intention control measurement with GUI start and terminate VM and ORB on other machines results collected and saved on one place with good structure visualization of results in charts show results during measurements get limits and characteristics from results

5. Distributed Systems Distributed Smalltalk (DST) –CORBA in Smalltalk –generating IDL from Smalltalk code –different programming languages Implicit Invocation Interface (I3) –alternative marshaler for DST –no IDL definitions –only Smalltalk-Smalltalk

6. Distributed Systems II. OpenTalk (OT) –framework for distributed system –implementation of St-St protocol GemStone (GS) –object database - object security, users, access rights, transactions, replication –large number of objects and large objects, optimized queries

7. Distributed Smalltalk (DST) register object for lifecycle protection against garbage collection register object in naming service using name instead of direct object reference look up the object in naming service received proxy object send messages to proxy object

8. CORBA Common Object Request Broker Architecture

9. Implicit Invocation Interface (I3) alternative marshaler fo DST no IDL definitions necessary passing objects by value / by reference setting pass mode per class, instance or instance variable classes passed just by name no methods are passed, just data

10. OpenTalk (OT) general framework for distributed system on top of TCP and UDP several protocols including St-St protocols unicast, multicast and broadcast protocol own implementation of services - naming, event, multiplexing broker with services provides interface between Smalltalk and network

11. GemStone (GS) large shared object repository multiuser environment with sessions concurrent environment with locks replication, forwarding, maintaining integrity class versions, history, migration of instances transactions, restoring security - users with access rights, ownership, profiles, groups security, authorization on object level object database, optimized queries, storing more and larger objects

12. User Interface - Control Window

13. User Interface - Menu Task Selection

14. User Interface - Menu Task Selection II.

15. How It Works add names to list of free nodes start VM+ORB on selected machine node registred in naming service and control node appears started nodes choose test to start on selected nodes watch results in charts

16. How It Works 1 234

17. Measurements I. Services: –data transfer, no services –life cycle registration and unregistration –naming service registration, unregistration and lookup

18. Measurements II. Data transfer –simple data types –Array/Sequence/String - different sizes –complex structures Char Char | Char | Char Char

19. Measurements III. Parallelism –no parallelism 1 client, 1 server –par. on server many clients, 1 server –par. on client many servers, 1 client

20. Measurements IV. Direction of data transfer –from client to server as a message argument –from server to client as a message result –both argument and result –oneway messages msg: arg msg msg: arg result

21. Measurements V. Number of ORBs –no ORB just standard message passing –one ORB simulation within one ORB –two ORB real communication between ORBs

22. Measurements VI. Locality –local several images on one machine –remote each one on different machine

23. Measurements VII. Interface –DST - Distributed Smalltalk –I3 - Implicit Invocation Interface –(OpenTalk) –(GemStone) –(other programming languages)

24. Example of Results I. Naming Service - 1 ORB

25. Example of Results II. Naming Service - 2 ORB

26. Example of Results III. Simple Data Type - 1 ORB

27. Example of Results IV. Simple Data Type - 2 ORB

28. Example of Results V. Simple Data Type - I3 Summary

29. Example of Results VI. Array - Rate

30. Example of Results VII. Array - Throughput

31. Example of Results VIII. String - Rate

32. Example of Results IX. String - Throughput

33. Saving Results hierarchy of directories data - text, boss images - gif, postscript reports - tex, dvi, postscript, pdf, html+gif archives - tar+gzip links to last version in case of repeated measurement

34. Results - Files I. [jan@jan test_NS]$ echo $PWD /home/jan/vw7nc/results/Sun_Ray/Smalltalk/local/w ith_two_ORB/test_NS [jan@jan test_NS]$ ls -sh total 312K 899 data_xy_speed(number_of_objects)_1.bos 521 data_xy_speed(number_of_objects)_1.txt 901 data_xy_speed(number_of_objects)_2.bos 524 data_xy_speed(number_of_objects)_2.txt 890 data_xy_time(number_of_objects)_1.bos 480 data_xy_time(number_of_objects)_1.txt 892 data_xy_time(number_of_objects)_2.bos 483 data_xy_time(number_of_objects)_2.txt

35. Results - Files II. 14K chart_xy_speed(number_of_objects)_1.eps 16K chart_xy_speed(number_of_objects)_1.gif 13K chart_xy_speed(number_of_objects)_2.eps 16K chart_xy_speed(number_of_objects)_2.gif 13K chart_xy_time(number_of_objects)_1.eps 16K chart_xy_time(number_of_objects)_1.gif 13K chart_xy_time(number_of_objects)_2.eps 16K chart_xy_time(number_of_objects)_2.gif 19 names_of_files.bos -> names_of_files1.bos 1.7K names_of_files1.bos

36. Results - Files III. 11 report.dvi -> report1.dvi 12 report.html -> report1.htm l10 report.ps -> report1.ps 11 report.tex -> report1.tex 11 report.txt -> report1.txt 118 report1.aux 5.9K report1.dvi 3.8K report1.html 3.5K report1.log 96K report1.ps 4.7K report1.tex 2.2K report1.txt

37. Implementation I. Developing environment –Cincom Smalltalk VisualWorks 5i.4 ( - 7.1) SunRay –Sun Blade 1000, 2 x UltraSparcIII 750MHz, 1GB RAM, OS Solaris 8, Ethernet 100Mb/s Solaris –SparcStation 4, 64MB RAM, Sun OS 5.7, Ethernet 10Mb/s

38. Implementation II. Java Laboratory –Sun Ultra 5, UltraSparcIIi 400MHz, 128MB RAM, OS Solaris 8, Ethernet 100Mb/s Standalone –PC AMD K6-2 450MHz, 256MB RAM, OS Red Hat Linux 8.0, standalone

39. Results - Summary [jan@jan results]$ du -sh * 159M AMD_450 148M Java 146M Solaris 154M Sun_Ray

40. Summary automated framework with GUI complex tests on group of computers visualization of results immediately limits, characteristics of particular interface

41. Future Work include OpenTalk and GemStone tests more testing of complex structures other programming languages and several ORB vendors optimizations of distributed interface transfer of behaviour (code in methods)

42. Questions Jan Lukeš xlukesj@fel.cvut.cz