Java Profiling on Linux

Question

I have a fairly complex Java application that is utilizing a lot of CPU, and would like to know if there is any recommendation on a profile tool that I could use to determine the cause of the CPU utilization. My goal is to pinpoint the location in the code where it is using most of the CPU time.

Are you using an IDE? Most good IDEs have profilers either built in or available as modules. — Michael Myers
– Michael Myers ♦, Commented Mar 5, 2010 at 16:29
Nope, I am not running an IDE. My application actually is started my another application. — beyonddc
– beyonddc, Commented Mar 5, 2010 at 16:32
What Java version are you running? Is it 1.6 update 7 or newer? — Michael Myers
– Michael Myers ♦, Commented Mar 5, 2010 at 16:34
If you have JDK 1.6.0_07 or newer, it comes with JVisualVM; that's why I ask. — Michael Myers
– Michael Myers ♦, Commented Mar 5, 2010 at 17:43

Paul Tomblin · Accepted Answer · 2010-03-05 16:36:41Z

3

I've used jProfiler and YourKit on Linux. But you might find the information you're looking for by running the jconsole that comes with recent JDKs. Good information on how to use it: http://java.sun.com/developer/technicalArticles/J2SE/jconsole.html

answered Mar 5, 2010 at 16:36

Paul Tomblin

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srini.venigalla · Accepted Answer · 2010-03-05 23:43:29Z

0

Netbeans has good built-in profiler. NB runs quite well on Ubuntu 9.10

If your issue cannot be observed in developement, you can attach the profiler to a remote JVM (your production environment). You have to configure the host JVM to accept the JMS/JConsole connections from the profilers. The JMS/JConsole realtime monitoring visualization charts look pretty awesome.

edited Mar 5, 2010 at 23:43

answered Mar 5, 2010 at 23:38

srini.venigalla

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Anu · Accepted Answer · 2010-03-06 00:10:13Z

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I have used Visual VM in the eclipse IDE. If you are not on an IDE, jhat and jconsole will help. Google jhat for more info

answered Mar 6, 2010 at 0:10

Anu

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reprogrammer · Accepted Answer · 2010-03-07 16:53:53Z

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If you are comfortable with Eclipse, I'd recommend TPTP.

answered Mar 7, 2010 at 16:53

reprogrammer

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Thorbjørn Ravn Andersen · Accepted Answer · 2010-03-07 17:29:03Z

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If you use Sun Java 6 then learn to use jvisualvm in the JDK on the machine running the troublesome program.

It will answer most of your questions, can attach effortlessly to an already running program and is gratis.

answered Mar 7, 2010 at 17:29

Thorbjørn Ravn Andersen

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Community · Accepted Answer · 2017-05-23 10:24:38Z

-1

This method is low-tech but works best. Here's a short explanation why.

Since you are not running under an IDE, you can use pstack or lsstack to get stack samples. If the app is using lots more time than it should, then most likely the problem is one or a few rogue function calls, which will be clearly visible on most of the stack samples.

edited May 23, 2017 at 10:24

CommunityBot

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answered Mar 5, 2010 at 20:11

Mike Dunlavey

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