success 52329 jpin 2008-12-16T18:03:11Z 2009-04-20T21:09:12Z jpinNew Toy Project. It’s a Javaagent based profiling tool. Now it uses Javaassist as a BCI(Byte-Code Instrumentation). And, The goal of the project is to make a simple and lightweight profiling tool for finding a performance problem with low memory consumptions and least heisenberg effects. Users can do poke a pinpoint to a specific portion of a system. Now, it’s in an early stage. Version0.1 GoalLow Memory Profile Low Monitoring Overhead Intuitive User Interface MeasurementsMethod Execution Time Free/Max Heap Memory Change Call Sequence Configuration File : PinpointerclassName1:methodName1 className1:methodName2 className4:methodName123 className:* className*:* *className*:* *:*TODOTrace Caller and Callee (v) Add profiling information to Thread Local Storage (with low memory profile) (v) Codebook-based Trace Output (Three Steps: 1. Building Codebook 2. Monitoring 3. Code Resolving) Data Mining (Cluster Algorithm) for detecting Hot spots Visualization with GraphViz / NetworkX Statistics Graph with R Overhead PortionsMethod Wrapper Code Block to measure time and memory changes Taking Stack Traces of a thread to get caller/callee Delivering output from JPin out of a system Usage of TLS (ThreadLocal Storage) (Concerns on TLS heavy use codes such like ReentrantReadWriteLock) Downloadsvn checkout http://jpin.googlecode.com/svn/trunk/ jpin-read-only AuthorDongWoo Lee (leepro@gmail.com) Screenshots Call Stack (Test) [jpin*] Hello.main 2040668008 -> Hello.main 3 [jpin*] Hello.main 2040668008 -> HelloSub.test1 5 [jpin*] HelloSub.test1 210331534 -> HelloSub.test2 7 [jpin*] HelloSub.test2 210332495 -> HelloSub.test3 9 [jpin*] HelloSub.test2 210332495 HelloSub.test2 5 [jpin*] HelloSub.test2 210332495 -> HelloSub.test3 7 [jpin*] HelloSub.test2 210332495 HelloSub.test3 5 [jpin*] Hello.main 2040668008 http://code.google.com/p/jpin jpin 0 0 525359 525359 52329 2009-12-19T07:29:57Z 2009-12-19T07:29:53Z 2008-04-01T00:00:00Z 2008-05-01T00:00:00Z 1 637 5 Java gpl GNU General Public License 2.0