Page 1 © 2001 Hewlett-Packard Company Tools for Measuring System and Application Performance Introduction GlancePlus Introduction Glance Motif Glance Character.

© 2001 Hewlett-Packard Company Tools for Measuring System and Application Performance Introduction GlancePlus Introduction Glance Motif Glance Character Mode Glance Command-line Xverbosegc HPjmeter and –Xeprof Other Tools

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 4 HPjmeter How To Collect Metrics HPjmeter java.eprof java.prof java.hprof.txt 1.1 Java 1.1.x JVMPI+ (HP-UX) Java 1.1.8+ Java 1.2.2.05+ Java 1.3.x JVMPI Java 1.2.1-A and compatible Java 1.3.0-C and compatible

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 5 HPjmeter JVMPI Options Options to use to any JVM: cpu=samples,thread=y,depth=10,cutoff=0,format=a heap=all,cpu=samples,thread=y,depth=10,cutoff=0,format=a monitor=y,cpu=samples,thread=y,depth=10,cutoff=0,format=a A support matrix for the features you need is online and in Help

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 6 HPjmeter JVMPI - Xrunhprof hprof usage: -Xrunhprof[:help]|[ =,...] Option Name/Value Description Default --------------------- ----------- ------- heap=dump|sites|all heap profiling all cpu=samples|times|oldCPU usage off monitor=y|n monitor contention n format=a|b ascii or binary outputa file= write data to file java.hprof(.txt) net= : send data over a socketwrite to file

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 7 hprof usage: -Xrunhprof[:help]|[ =,...] Option Name and Value Description Default --------------------- ----------- ------- depth= stack trace depth 4 cutoff= output cutoff point 0.0001 lineno=y|n line number in traces? y thread=y|n thread in traces? n doe=y|n dump on exit? y Example: java -Xrunhprof:cpu=samples,file=log.txt,depth=3 FooClass HPjmeter JVMPI - Xrunhprof

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 8 HPjmeter Enhanced Profiling for HP-UX Profiling option for HotSpot -Xeprof:help Collects CPU time separately per thread Very low intrusion

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 9 HPjmeter HP JVM’s -Xeprof Option Options to use for HP’s JVM: -Xeprof:file=java.$$.eprof Specify the $$ in the script with the java command to include the Process Identifier in the name and ensure files are not overwritten

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 11 HPjmeter Elapsed (Wall Clock) and CPU Time Inclusive and Exclusive times Methods Classes Process Thread Call Graph Tree form Call hierarchy navigation Ability to find callers quickly!

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 12 HPjmeter Object Creation Allocated Objects Residual Objects Location in code where created Reference Graph –Tree form –Ability to find referencing objects

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 13 HPjmeter HP JVM’s -Xeprof Option Options to use for HP’s JVM: -Xeprof:file=java.$$.eprof Specify the $$ in the script with the java command to include the Process Identifier in the name and ensure files are not overwritten

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 44 Exceptions Bad programming practice to use as: Terminators for searches Indicators of a frequent exception condition HPjmeter makes them easy to find Guess:Exceptions Thrown

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 69 HPjmeter Threads Thread Lifetimes Thread states - CPU, I/O, Waiting, GC,... Color coded to emphasize important performance characteristics Distribution over lifetime Visualize thread starvation Sort Thread Histogram by: Birth time of thread Heuristic based on each thread’s metrics CPU time used by method in Find pop-up

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 75 HPjmeter Java Application Monitor Contention Highlights contested Java monitors JDK 1.3.1 – Exact metrics generated for contention Metrics: Lock requests when lock held Per-method time spent waiting for lock

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 108 HPjmeter Object Creation Allocated Objects Residual Objects Location in code where created Reference Graph –Tree form –Ability to find referencing objects

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 109 HPjmeter Object Creation Created Objects Count with -Xeprof requires either: -Xeprof:inlining=disable or: -Xint -Xeprof Created Objects (Bytes) requires use of the the Classic JVM and hprof: java -classic -Xrunhprof:heap=all,cutoff=0,...

Tools for Measuring Performance © 2001 Hewlett-Packard Company Page 119 HPjmeter Profile Comparison Compare profile data from two different runs – See impact of – Code modification – Load change – Eliminate start-up noise – Find “memory retention”

Page 1 © 2001 Hewlett-Packard Company Tools for Measuring System and Application Performance Introduction GlancePlus Introduction Glance Motif Glance Character.

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Page 1 © 2001 Hewlett-Packard Company Tools for Measuring System and Application Performance Introduction GlancePlus Introduction Glance Motif Glance Character.

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Presentation on theme: "Page 1 © 2001 Hewlett-Packard Company Tools for Measuring System and Application Performance Introduction GlancePlus Introduction Glance Motif Glance Character."— Presentation transcript:

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