HPROF: A Heap/CPU Profiling Tool in J2SE 5.0 - The Diigo Meta page

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  •  

     The above stack traces are shared with all the running threads, if it was necessary to separate the stack traces of different threads the thread option would need to be used. This will increase the space used and the number of stack traces in the output file. 
  • Normally you want to watch out for large accumulations of objects, allocated at the same location, that seem excessive.

  • Currently HPROF injects calls to static Java methods which in turn call a native method that is in the HPROF agent library itself. This was an early design choice to limit the extra Java code introduced during profiling. So the combination of the requested JVM TI events, and the created BCI events, provides the basics for HPROF to work.  

     

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• 08 Dec 11
  

  Ching Yi Chan

  java profiling

• 23 Jun 11
  

  Jack Lavender

  The Java 2 Platform Standard Edition (J2SE) has always provided a simple command line profiling tool called HPROF for heap and cpu profiling. HPROF is actually a JVM native agent library which is dynamically loaded through a command line option, at JVM startup, and becomes part of the JVM process. By supplying HPROF options at startup, users can request various types of heap and/or cpu profiling features from HPROF. The data generated can be in textual or binary format, and can be used to track down and isolate performance problems involving memory usage and inefficient code. The binary format file from HPROF can be used with tools such as HAT to browse the allocated objects in the heap.

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• 29 Mar 09
  

  Роман Каршиев

  Having performance problems with your Java Application? Using too much Java heap space and don't know why? Sometimes simple software tools are all that's needed. This article discusses those tools.

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• 12 Mar 09
  

  li feng

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  Martin Kovacik

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• 05 Sep 08
  

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  • java -agentlib:hprof=heap=sites ToBeProfiledClass
  • HPROF can collect CPU usage information by injecting code into every method entry and exit, keeping track of exact method call counts and the time spent in each method. This uses Byte Code Injection (BCI) and runs considerably slower than cpu=samples.
• 01 Jul 08
  

  Nigel Sim

  java profiling memory cpu

• 09 Apr 08
  

  Olivier C

  The Java 2 Platform Standard Edition (J2SE) has always provided a simple command line profiling tool called HPROF for heap and cpu profiling. HPROF is actually a JVM native agent library which is dynamically loaded through a command line

  java:profiling programming delicious

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  yoyoyoyo

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  Foo Foo

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  Magnus K

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• 29 Sep 06
  

  arnold reuser

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  • he Java 2 Platform Standard Edition (J2SE) has always provided a simple command line profiling tool called HPROF for heap and cpu profiling. HPROF is actually a JVM native agent library which is dynamically loaded through a command line option, at JVM startup, and becomes part of the JVM process.
  • By supplying HPROF options at startup, users can request various types of heap and/or cpu profiling features from HPROF.
• 20 Sep 06
  

  Denis Scholler

  HPROF is actually a JVM native agent library which is dynamically loaded through a command line option, at JVM startup, and becomes part of the JVM process. By supplying HPROF options at startup, users can request various types of heap and/or cpu profilin

  java profiler tools tuning documentation debugging

• 18 Sep 06
  

  morrita

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• 09 Aug 06
  

  Edgar Meij
  • HPROF: A Heap/CPU Profiling Tool in J2SE 5.0
• 03 Jul 06
  

  Built-in profiler with 1.5 JVM. Easy to use and results quite comprehensible.

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• 02 Jun 05
  

  John Doe

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• 19 Jan 05
  

  Prabhu B

  About CPU Profiling Java

• 18 Nov 04
  

  kanzen zen

  performance debugging profiling Java Development

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• 
  Edgar Meij on 2006-08-09
  java profiling tool benchmark memory disk cpu

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