Presentation of JPicus for Eclipse Summit Europe 2009.

1. 1JPicus I/O Analysis Framework 1.1
How about I/O ?
Kiril Mitov & Pavel Genevski
SAP Labs Bulgaria
Technology Development

2. 2JPicus I/O Analysis Framework 1.1
Agenda
 Why I/O analysis is important?
 JPicus - closing the gap
 Why Eclipse?
 Summary
 Q&A

3. 3JPicus I/O Analysis Framework 1.1
Why I/O analysis is important?
 Moving data in and out of RAM
 Throughput and latency
 I/O is really slow
 Today’s IT trends and I/O analysis
 Cloud computing / SaaS
 Distributed services
 Multi-core & Parallelism
Hard drive

4. 4JPicus I/O Analysis Framework 1.1
JPicus I/O Analysis Framework
 JavaTM
I/O analysis framework
 Non-intrusive
 Cross platform
 Free
JVM
Application
JPicus Agent
-javaagent:jpicus.jar
JPicus UI Test/KPI
Snapshots

5. 5JPicus I/O Analysis Framework 1.1
I/O Problem areas
 Correctness
 File handle leaks
 Exhausted file handles
 Failed delete operations – can’t delete a file
 Undesired delete operations – who deleted a file
 Performance
 Excessive I/O / bottlenecks
 Suboptimal I/O / insufficient buffering

6. 6JPicus I/O Analysis Framework 1.1
Tips and tricks
 Always close your streams
 DocumentBuilder.parse(“jar:file:…”)
 Equinox: osgi.bundlefile.limit=200
 Watch for excessive logging
 Watch for “Introvert” module contracts
 No nested archives

7. 7JPicus I/O Analysis Framework 1.1
Why Eclipse?
 A mature platform, widely adopted in SAP
 Modularization
 Many useful features and extension points
 Perspectives
 Source code navigation
 Help system
 Widely adopted by the developer community

8. 8JPicus I/O Analysis Framework 1.1
Possible next steps
 TCP & UDP
 Comparison of snapshots
 Object Query Language (OQL)
 SAP JVM / SAP JVM Profiler
 You name it!

9. 9JPicus I/O Analysis Framework 1.1
Summary
 I/O Analysis is important
 JPicus fills the gap
 Give it a try!
 JPicus wiki page
 http://jpicus.com
 Share your experience!
 Java Development SDN forum

10. 10JPicus I/O Analysis Framework 1.1
Thank you
Q&A